{"id":3497,"date":"2026-07-13T18:36:06","date_gmt":"2026-07-13T18:36:06","guid":{"rendered":"https:\/\/oscaleresource.com\/WP\/?page_id=3497"},"modified":"2026-07-13T18:36:06","modified_gmt":"2026-07-13T18:36:06","slug":"railroad-signal-document-archivedocuments-digitized-by-the-collectors-at-rrsignalpix-com-each-entry-links-back-to-its-source-hosted-for-reference-by-the-o-scale-resource","status":"publish","type":"page","link":"https:\/\/oscaleresource.com\/WP\/index.php\/railroad-signal-document-archivedocuments-digitized-by-the-collectors-at-rrsignalpix-com-each-entry-links-back-to-its-source-hosted-for-reference-by-the-o-scale-resource\/","title":{"rendered":"Railroad Signal Document Archive<br><h5>Documents digitized by the collectors at rrsignalpix.com; each entry links back to its source. Hosted for reference by The O Scale Resource.<\/h5>"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"font-family: verdana, geneva, sans-serif; font-size: 18pt;\">Scanned catalogs, bulletins, and handbooks from the signal builders of the steam and early-diesel eras \u2014 Union Switch &amp; Signal, General Railway Signal, Hall, and many more. Read online or download. 166 documents in the collection.<\/span><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 14pt;\">Documents digitized by the collectors at <a href=\"http:\/\/rrsignalpix.com\" target=\"_blank\" rel=\"noopener\">rrsignalpix.com<\/a>; each entry links back to its source. Hosted for reference by The O Scale Resource. <\/span><\/strong><\/p>\n<style id=\"sigarch-css\">\n.sigarch{--accent:#010075;--accent-dark:#010057;--secondary:#2d3359;\n  --card:#fff;--muted:#8a8a8a;--line:#e8e8e8;\n  --shadow:0 1px 3px rgba(0,0,0,.12),0 1px 2px rgba(0,0,0,.20);\n  --shadow-hi:0 6px 16px rgba(0,0,0,.15),0 3px 6px rgba(0,0,0,.12);\n  font-family:inherit;color:#2d2d2d;max-width:1100px;margin:0 auto}\n.sigarch *{box-sizing:border-box}\n.sigarch .sig-intro{font-size:16px;color:#555;margin:0 0 20px;max-width:70ch}\n.sigarch .sig-toolbar{display:flex;gap:16px;align-items:center;padding:14px 18px;flex-wrap:wrap;\n  background:var(--card);box-shadow:var(--shadow);border-radius:3px;margin:0 0 30px;\n  position:sticky;top:0;z-index:5}\n.sigarch .sig-search{flex:1;min-width:230px;position:relative}\n.sigarch .sig-search input{width:100%;font-family:inherit;font-size:15px;color:#2d2d2d;\n  padding:12px 14px 12px 40px;border:1px solid var(--line);border-radius:3px;background:#fafafa}\n.sigarch .sig-search input:focus{outline:none;border-color:var(--accent);background:#fff;\n  box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}\n.sigarch .sig-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted)}\n.sigarch .sig-count{font-size:13px;color:var(--muted);white-space:nowrap}\n.sigarch .sig-count b{color:var(--accent);font-weight:700}\n.sigarch .sig-grp{margin:0 0 38px}\n.sigarch .sig-grp-head{display:flex;align-items:baseline;gap:12px;margin:0 0 18px}\n.sigarch .sig-grp-head h3{font-family:inherit;font-weight:500;font-size:21px;letter-spacing:.01em;\n  color:var(--secondary);margin:0;padding:0;border:0}\n.sigarch .sig-rule{flex:1;height:1px;background:var(--line)}\n.sigarch .sig-n{font-size:12px;color:#fff;background:var(--accent);border-radius:20px;\n  padding:2px 10px;font-weight:500}\n.sigarch .sig-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px}\n.sigarch .sig-doc{background:var(--card);border-radius:3px;box-shadow:var(--shadow);\n  padding:18px 20px 15px;display:flex;flex-direction:column;\n  transition:box-shadow .18s ease,transform .18s ease}\n.sigarch .sig-doc:hover{box-shadow:var(--shadow-hi);transform:translateY(-3px)}\n.sigarch .sig-co{font-family:inherit;font-weight:500;font-size:16px;line-height:1.3;color:var(--secondary)}\n.sigarch .sig-de{font-size:13.5px;color:#5f5f5f;margin-top:5px;flex:1}\n.sigarch .sig-meta{display:flex;gap:7px;align-items:center;margin-top:13px;flex-wrap:wrap}\n.sigarch .sig-chip{font-size:11px;letter-spacing:.03em;padding:2px 9px;border-radius:20px;\n  background:#f0f0f0;color:#6a6a6a}\n.sigarch .sig-chip.yr{background:color-mix(in srgb,var(--accent) 12%,#fff);color:var(--accent-dark);font-weight:500}\n.sigarch .sig-foot{display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:12px;\n  border-top:1px solid var(--line)}\n.sigarch .sig-actions{display:flex;gap:8px}\n.sigarch .sig-btn{font-family:inherit;text-transform:uppercase;letter-spacing:.05em;font-size:12px;\n  font-weight:500;text-decoration:none;padding:7px 15px;border-radius:2px;\n  display:inline-flex;align-items:center;gap:5px;line-height:1.2;\n  transition:background .15s,color .15s,border-color .15s}\n.sigarch .sig-btn.view{color:#fff;background:var(--accent);box-shadow:0 1px 3px rgba(0,0,0,.2)}\n.sigarch .sig-btn.view:hover{background:var(--accent-dark);color:#fff}\n.sigarch .sig-btn.dl{color:var(--accent);background:transparent;border:1px solid var(--line)}\n.sigarch .sig-btn.dl:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,#fff)}\n.sigarch .sig-src{margin-left:auto;font-size:11.5px;color:var(--muted);text-decoration:none;\n  display:inline-flex;align-items:center;gap:3px}\n.sigarch .sig-src:hover{color:var(--accent)}\n.sigarch .sig-src svg{width:11px;height:11px}\n.sigarch .sig-none{display:none;text-align:center;padding:50px 20px;color:var(--muted)}\n@media (max-width:540px){.sigarch .sig-grid{grid-template-columns:1fr}}\n@media (prefers-reduced-motion:reduce){.sigarch *{transition:none!important}}\n<\/style>  <div class=\"sigarch\">\n    <p class=\"sig-intro\">Scanned catalogs, bulletins, and handbooks from the signal builders of the steam and early-diesel eras &mdash; Union Switch &amp; Signal, General Railway Signal, Hall, and many more. Read online or download; each entry also links back to its source. 166 documents in the collection.<\/p>\n    <div class=\"sig-toolbar\">\n      <div class=\"sig-search\">\n        <svg width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><circle cx=\"11\" cy=\"11\" r=\"7\"\/><path d=\"m21 21-4.3-4.3\"\/><\/svg>\n        <input type=\"search\" placeholder=\"Search by company, catalog, bulletin, or year&hellip;\" autocomplete=\"off\" aria-label=\"Search documents\">\n      <\/div>\n      <div class=\"sig-count\"><b class=\"sig-shown\">166<\/b> of 166 shown<\/div>\n    <\/div>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Union Switch &amp; Signal Company<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">50<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of automatic rail circuit block, draw-bridge, crossing and station signaling may 1st, 1883 1883 uss_cat_1883_2_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Automatic Rail Circuit Block, Draw-Bridge, Crossing and Station Signaling May 1st, 1883<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1883<\/span>              <span class=\"sig-chip\">16.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1883_2_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1883_2_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1883_2_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of interlocking may 1st, 1883 1883 uss_cat_1883_1_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking May 1st, 1883<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1883<\/span>              <span class=\"sig-chip\">49.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1883_1_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1883_1_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1883_1_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company 1894 a catalogue of the devices and their parts 1894 uss_cat_1894_opt_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">1894 A Catalogue Of The Devices and Their Parts<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1894<\/span>              <span class=\"sig-chip\">185.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1894_opt_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1894_opt_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1894_opt_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of interlocking and signaling devices 1902 section 1 mechanical interlocking machines and ground lever stands 1902 uss_cat_1902_s01_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking and Signaling Devices 1902 Section 1 Mechanical Interlocking Machines and Ground Lever Stands<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1902<\/span>              <span class=\"sig-chip\">39.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S01_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S01_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1902_S01_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of interlocking and signaling devices 1902 section 11 electric locks, electric slots, hand releases and time locks 1902 uss_cat_1902_s11_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking and Signaling Devices 1902 Section 11 Electric Locks, Electric Slots, Hand Releases and Time Locks<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1902<\/span>              <span class=\"sig-chip\">37.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S11_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S11_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1902_S11_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of interlocking and signaling devices 1902 section 12 the union electric semaphore and the union disc signal 1902 uss_cat_1902_s12_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking and Signaling Devices 1902 Section 12 The Union Electric Semaphore and The Union Disc Signal<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1902<\/span>              <span class=\"sig-chip\">27.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S12_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S12_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1902_S12_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of interlocking and signaling devices 1902 section 2 mechanical ground connections and leadout appliances 1902 uss_cat_1902_s2_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking and Signaling Devices 1902 Section 2 Mechanical Ground Connections and Leadout Appliances<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1902<\/span>              <span class=\"sig-chip\">54.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S2_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S2_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1902_S2_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company catalogue of interlocking and signaling devices 1902 section 4 mechanical interlocking signals 1902 uss_cat_1902_s4_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking and Signaling Devices 1902 Section 4 Mechanical Interlocking Signals<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1902<\/span>              <span class=\"sig-chip\">56.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S4_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_1902_S4_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_1902_S4_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company 1907 catalogue of pennsylvania railroad standard appliances 1907 uss_prr_1907_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">1907 Catalogue of Pennsylvania Railroad Standard Appliances<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1907<\/span>              <span class=\"sig-chip\">80.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_PRR_1907_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_PRR_1907_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_PRR_1907_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company electric train staff catalogue september, 1907 1907 uss_staff_1907_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Electric Train Staff Catalogue September, 1907<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1907<\/span>              <span class=\"sig-chip\">141.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Staff_1907_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Staff_1907_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Staff_1907_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company swissvale, pa. 1907 electro-pneumatic catalogue 1907 uss_ep_1907_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Swissvale, Pa. 1907 Electro-Pneumatic Catalogue<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1907<\/span>              <span class=\"sig-chip\">36.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EP_1907_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EP_1907_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_EP_1907_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company a catalogue and price list of interlocking and signaling devices 1909 1909 uss_cat_1909_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">A Catalogue and Price List of Interlocking and Signaling Devices 1909<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1909<\/span>              <span class=\"sig-chip\">61.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_cat_1909_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_cat_1909_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_cat_1909_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company swissvale, pa. 1909 catalogue of electric crossing bell appliances 1909 uss_1909_crossing_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Swissvale, Pa. 1909 Catalogue of Electric Crossing Bell Appliances<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1909<\/span>              <span class=\"sig-chip\">33 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_1909_Crossing_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_1909_Crossing_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_1909_Crossing_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company swissvale, pa. 1909 electric interlocking catalogue 1909 uss_ei_1909_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Swissvale, Pa. 1909 Electric Interlocking Catalogue<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1909<\/span>              <span class=\"sig-chip\">181.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EI_1909_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EI_1909_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_EI_1909_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company swissvale, pa. 1909 electro-pneumatic catalogue volume 2 1909 uss_ep_1909_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Swissvale, Pa. 1909 Electro-Pneumatic Catalogue Volume 2<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1909<\/span>              <span class=\"sig-chip\">15.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EP_1909_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EP_1909_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_EP_1909_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company swissvale, pa. 1909 electro-pneumatic catalogue volume 3 1909 uss_ep_1909_v3_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Swissvale, Pa. 1909 Electro-Pneumatic Catalogue Volume 3<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1909<\/span>              <span class=\"sig-chip\">99.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EP_1909_V3_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EP_1909_V3_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_EP_1909_V3_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company swissvale, pa. volume 2 electric interlocking catalogue 1911 1911 uss_ei_1911_v2_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Swissvale, Pa. Volume 2 Electric Interlocking Catalogue 1911<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1911<\/span>              <span class=\"sig-chip\">122.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EI_1911_V2_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_EI_1911_V2_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_EI_1911_V2_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company union electric semaphore equipped with style &quot;s&quot; mechanism 1911 bulletin no. 42 1911 uss_42_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Union Electric Semaphore Equipped With Style &quot;S&quot; Mechanism 1911 Bulletin No. 42<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1911<\/span>              <span class=\"sig-chip\">13.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_42_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_42_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_42_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company style &quot;t-2&quot; signals bulletin no. 67 october 1913 1913 uss_67_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Style &quot;T-2&quot; Signals Bulletin No. 67 October 1913<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1913<\/span>              <span class=\"sig-chip\">40.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_67_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_67_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_67_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company safety efficiency economy the tdb system bulletin no. 69 february 1914 1914 uss_69_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Safety Efficiency Economy The TDB System Bulletin No. 69 February 1914<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1914<\/span>              <span class=\"sig-chip\">71.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_69_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_69_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_69_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company alternating current signaling 1915 1915 uss_ac_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Alternating Current Signaling 1915<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1915<\/span>              <span class=\"sig-chip\">209.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_AC_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_AC_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_AC_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company union three aspect flagman style &quot;dw&quot; bulletin no. 86 with supplement no. 1 december 1916 1916 uss_86_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Union Three Aspect Flagman Style &quot;DW&quot; Bulletin No. 86 with Supplement No. 1 December 1916<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1916<\/span>              <span class=\"sig-chip\">11.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_86_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_86_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_86_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company the type &quot;f&quot; system of electric interlocking bulletin 100 november, 1922 1922 uss_100_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">The Type &quot;F&quot; System of Electric Interlocking Bulletin 100 November, 1922<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1922<\/span>              <span class=\"sig-chip\">70.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_100_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_100_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_100_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company a story of two wires bulletin 112 june-1927 reprinted october-1927 1927 uss_112_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">A Story of Two Wires Bulletin 112 June-1927 Reprinted October-1927<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1927<\/span>              <span class=\"sig-chip\">20.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_112_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_112_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_112_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company &quot;union&quot; automatic continuous train control bulletin 105 october, 1929 1929 uss_105_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">&quot;Union&quot; Automatic Continuous Train Control Bulletin 105 October, 1929<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1929<\/span>              <span class=\"sig-chip\">53.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_105_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_105_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_105_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company operating trains without train orders bulletin 150 april, 1935 1935 uss_150_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Operating Trains Without Train Orders Bulletin 150 April, 1935<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1935<\/span>              <span class=\"sig-chip\">70.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_150_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_150_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_150_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company remote control bulletin 152 august, 1937 1937 uss_152_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Remote Control Bulletin 152 August, 1937<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1937<\/span>              <span class=\"sig-chip\">60.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_152_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_152_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_152_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company centralized traffic control catalog section &quot;t&quot; no. 306 july, 1941 1941 uss_cat_t_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Centralized Traffic Control Catalog Section &quot;T&quot; No. 306 July, 1941<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1941<\/span>              <span class=\"sig-chip\">59 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_T_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_Cat_T_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_Cat_T_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch &amp; signal company style nl-15, 60 cyc, 20 va, spec 1413a voltage table and connection diagram 0-30-10  0-30-10_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch &amp; Signal Company<\/div>\n            <div class=\"sig-de\">Style NL-15, 60 Cyc, 20 VA, Spec 1413A Voltage Table and Connection Diagram 0-30-10<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">360 KB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/0-30-10_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/0-30-10_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/0-30-10_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch &amp; signal company style nl-15, 60 cyc, 50 va, spec 1174 voltage table and connection diagram 0-30-9  0-30-9_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch &amp; Signal Company<\/div>\n            <div class=\"sig-de\">Style NL-15, 60 Cyc, 50 VA, Spec 1174 Voltage Table and Connection Diagram 0-30-9<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">360 KB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/0-30-9_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/0-30-9_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/0-30-9_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch &amp; signal company style w-10, 60\/100 cyc, 300 va, spec 2118 voltage table and connection diagram 0-30-15  0-30-15_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch &amp; Signal Company<\/div>\n            <div class=\"sig-de\">Style W-10, 60\/100 Cyc, 300 VA, Spec 2118 Voltage Table and Connection Diagram 0-30-15<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">281 KB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/0-30-15_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/0-30-15_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/0-30-15_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company automatic block signaling washington, baltimore &amp; annapolis electric r.r. bulletin 61  uss_61_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Automatic Block Signaling Washington, Baltimore &amp; Annapolis Electric R.R. Bulletin 61<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">26.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_61_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_61_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_61_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company bulletin 124 turning minutes into dollars  uss_124_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Bulletin 124 Turning Minutes Into Dollars<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_124_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_124_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_124_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company centralized traffic control union ctc bulletin 148  uss_148_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Centralized Traffic Control Union CTC Bulletin 148<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">169.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_148_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_148_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_148_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company interborough rapid transit company, new york. electro-pneumatic interlocking and signaling bulletin no. 21 revised print  uss_21_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Interborough Rapid Transit Company, New York. Electro-Pneumatic Interlocking and Signaling Bulletin No. 21 Revised Print<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">25.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_21_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_21_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_21_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company multiple unit electric interlocking system bulletin no. 49  uss_49_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Multiple Unit Electric Interlocking System Bulletin No. 49<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">65.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_49_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_49_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_49_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company operation of trains by signal indication on single track central of georgia bulletin 127  uss_127_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Operation of Trains by Signal Indication on Single Track Central of Georgia Bulletin 127<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">26.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_127_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_127_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_127_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company the signal in the cab bulletin 144  uss_144_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">The Signal In The Cab Bulletin 144<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">14 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_144_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_144_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_144_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company the table interlocker bulletin 110  uss_110_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">The Table Interlocker Bulletin 110<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">26.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_110_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_110_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_110_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company the union electric semaphore signal bulletin no. 6  uss_6_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">The Union Electric Semaphore Signal Bulletin No. 6<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_6_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_6_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_6_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the union switch and signal company training course in railway signal engineering bulletin no. 140  uss_140_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Training Course In Railway Signal Engineering Bulletin No. 140<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">22 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_140_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_140_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_140_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company bulletin 45 a system of automatic block signaling for single track operation  uss_45_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Bulletin 45 A System of Automatic Block Signaling for Single Track Operation<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">4.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_45_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_45_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_45_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company bulletin 73 electro-pneumatic interlocking  uss_73_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Bulletin 73 Electro-Pneumatic Interlocking<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">40 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_73_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_73_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USS_73_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5006 maintenance of style &quot;t-2&quot; d.c. signals  u_5006_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5006 Maintenance of Style &quot;T-2&quot; D.C. Signals<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">2.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/U_5006_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/U_5006_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/U_5006_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5007 installation and adjustment of position light signal  u-5007_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5007 Installation and Adjustment of Position Light Signal<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">762 KB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/U-5007_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/U-5007_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/U-5007_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5012 installation and maintenance of style &quot;p-2&quot; color light signal  u-5012_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5012 Installation and Maintenance of Style &quot;P-2&quot; Color Light Signal<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">963 KB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/U-5012_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/U-5012_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/U-5012_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5013 maintenance of style &quot;b&quot; a-c. and d-c. signals  u_5013_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5013 Maintenance of Style &quot;B&quot; a-c. and d-c. Signals<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/U_5013_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/U_5013_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/U_5013_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5034 installation and maintenance of styles h and h-2 searchlight signals with permanent magnet field structure  uss_h2.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5034 Installation and Maintenance of Styles H and H-2 Searchlight Signals with Permanent Magnet Field Structure<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">3.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_H2.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USS_H2.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/USS_H2.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5037 life, installation and replacement of railway light signal lamps  u_5037_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5037 Life, Installation and Replacement of Railway Light Signal Lamps<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">3.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/U_5037_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/U_5037_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/U_5037_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"union switch and signal company u-5429 installation of inclined cover glasses with phankill units on existing color light signals  u-5429_sec.pdf\">\n            <div class=\"sig-co\">Union Switch and Signal Company<\/div>\n            <div class=\"sig-de\">U-5429 Installation of Inclined Cover Glasses with Phankill Units on Existing Color Light Signals<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">851 KB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/U-5429_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/U-5429_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/U-5429_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>General Railway Signal Company<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">41<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1901 bulletin no. 105 supplementing catalogue, sections 1, 2 and 5 outlying switch lock model 1 form a 1901 grs_105_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1901 Bulletin No. 105 Supplementing Catalogue, Sections 1, 2 and 5 Outlying Switch Lock Model 1 Form A<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1901<\/span>              <span class=\"sig-chip\">14.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_105_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_105_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_105_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1905 section 1 electric interlocking 1905 grs_1905_e_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1905 Section 1 Electric Interlocking<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1905<\/span>              <span class=\"sig-chip\">65.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_1905_E_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_1905_E_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_1905_E_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1905 section 2 mechanical interlocking 1905 grs_1905_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1905 Section 2 Mechanical Interlocking<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1905<\/span>              <span class=\"sig-chip\">90.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_1905_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_1905_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_1905_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1908 section 5 automatic block signaling for steam roads 1908 grs_1908_a_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1908 Section 5 Automatic Block Signaling For Steam Roads<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1908<\/span>              <span class=\"sig-chip\">89 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_1908_A_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_1908_A_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_1908_A_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1909 bulletin no. 112 controlled manual block system station block instruments 1909 grs_112_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1909 Bulletin No. 112 Controlled Manual Block System Station Block Instruments<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1909<\/span>              <span class=\"sig-chip\">6.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_112_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_112_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_112_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1910 bulletin no. 115 supplementing catalogue, sections 1, 2, and 5 model 2a signal 1910 grs_115_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1910 Bulletin No. 115 Supplementing Catalogue, Sections 1, 2, and 5 Model 2A Signal<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1910<\/span>              <span class=\"sig-chip\">19.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_115_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1911 bulletin no. 115-a supplementing catalogue, sections 1, 2, and 5 model 2a signal 1911 grs_115a_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1911 Bulletin No. 115-A Supplementing Catalogue, Sections 1, 2, and 5 Model 2A Signal<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1911<\/span>              <span class=\"sig-chip\">14.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115A_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115A_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_115A_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1911 bulletin no. 115-b block signaling for high speed interurban lines 1911 grs_115b_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1911 Bulletin No. 115-B Block Signaling for High Speed Interurban Lines<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1911<\/span>              <span class=\"sig-chip\">8.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115B_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115B_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_115B_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1911 bulletin no. 120 automatic signaling for electric railways 1911 grs_120_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1911 Bulletin No. 120 Automatic Signaling for Electric Railways<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1911<\/span>              <span class=\"sig-chip\">12.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_120_Ocr_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_120_Ocr_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_120_Ocr_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company a.p. block system for single track steam railroads bulletin 128 march 1912 1912 grs_128_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">A.P. Block System for Single Track Steam Railroads Bulletin 128 March 1912<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1912<\/span>              <span class=\"sig-chip\">18.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_128_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_128_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_128_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company the way is clear bulletin 124 october, 1912 1912 grs_124_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">The Way Is Clear Bulletin 124 October, 1912<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1912<\/span>              <span class=\"sig-chip\">14.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_124_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_124_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_124_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company alternating current signals on the southern bulletin 126 december 1913 1913 grs_126_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Alternating Current Signals On The Southern Bulletin 126 December 1913<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1913<\/span>              <span class=\"sig-chip\">49.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_126_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_126_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_126_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company electric interlocking handbook (first print) 1913 1913 grs_e_interlocking_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Electric Interlocking Handbook (First Print) 1913<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1913<\/span>              <span class=\"sig-chip\">278.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_E_Interlocking_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_E_Interlocking_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_E_Interlocking_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1914 bulletin no. 115-c grs model 2a signal 1914 grs_115c_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1914 Bulletin No. 115-C GRS Model 2A Signal<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1914<\/span>              <span class=\"sig-chip\">14.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115C_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_115C_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_115C_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company model 2a signal handbook 2 pre-1918 booklet 1003a post-1918 march 1914 1918 handbook02_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Model 2A Signal Handbook 2 Pre-1918 Booklet 1003A Post-1918 March 1914<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1918<\/span>              <span class=\"sig-chip\">30.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Handbook02_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Handbook02_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Handbook02_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company alternating-current block signals on the southern railway system bulletin 146 october 1925 1925 grs_146_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Alternating-Current Block Signals on the Southern Railway System Bulletin 146 October 1925<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1925<\/span>              <span class=\"sig-chip\">44.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_146_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_146_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_146_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 1927 bulletin 154 centralized traffic control 1927 grs_154_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">1927 Bulletin 154 Centralized Traffic Control<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1927<\/span>              <span class=\"sig-chip\">8.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_154_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_154_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_154_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company type s and sa color-light signals installation, operation and maintenance booklet no. 8 january 1929 1929 handbook_08_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Type S and SA Color-Light Signals Installation, Operation and Maintenance Booklet No. 8 January 1929<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1929<\/span>              <span class=\"sig-chip\">5.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Handbook_08_Ocr_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Handbook_08_Ocr_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Handbook_08_Ocr_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company switch machines for your main line switches bulletin 161 july 1930 1930 grs_161_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Switch Machines For Your Main Line Switches Bulletin 161 July 1930<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1930<\/span>              <span class=\"sig-chip\">9.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_161_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_161_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_161_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company type k relays bulletin 162 august 1931 1931 grs_162_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Type K Relays Bulletin 162 August 1931<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1931<\/span>              <span class=\"sig-chip\">36.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_162_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_162_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_162_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company xb crossing signals have strong backlight indications f-o34 october 1931 1931 grs_f_o34_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">XB Crossing Signals Have Strong Backlight Indications F-O34 October 1931<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1931<\/span>              <span class=\"sig-chip\">2.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_F_O34_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_F_O34_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_F_O34_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company a powerful signal indication type sa searchlight signal bulletin 163 february, 1932 1932 grs_163_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">A Powerful Signal Indication Type SA Searchlight Signal Bulletin 163 February, 1932<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1932<\/span>              <span class=\"sig-chip\">24.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_163_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_163_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_163_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company assemblies signal equipment sections 5 - 97 1959 - 1969 1959 grs_10_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Assemblies Signal Equipment Sections 5 - 97 1959 - 1969<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1959<\/span>              <span class=\"sig-chip\">223 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_10_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_10_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_10_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company 2a signal, 110 volt - 3 position, dynamic indication, upper quadrant assembly adjustment testing  grs_2a_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">2A Signal, 110 Volt - 3 Position, Dynamic Indication, Upper Quadrant Assembly Adjustment Testing<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">15.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_2A_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_2A_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_2A_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company absolute permissive block system bulletin 128a  grs_128a_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Absolute Permissive Block System Bulletin 128A<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_128A_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_128A_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_128A_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company all-relay interlocking systems bulletin 188  grs_188_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">All-Relay Interlocking Systems Bulletin 188<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">9.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_188_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_188_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_188_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company centralized traffic control bulletin 169  grs_169_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Centralized Traffic Control Bulletin 169<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">11.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_169_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_169_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/GRS_169_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company economical protection with slide detector fences bulletin 168  grs_168_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Economical Protection With Slide Detector Fences Bulletin 168<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">3.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_168_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_168_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_168_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company grs color light &amp; position light signals bulletin 144  grs_144_ocr_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">GRS Color Light &amp; Position Light Signals Bulletin 144<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">14.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_144_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_144_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_144_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company model 9a electric switch lock bulletin 181  grs_181_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Model 9A Electric Switch Lock Bulletin 181<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">10.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_181_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_181_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_181_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company modern crossing protection by g-r-s type xa and xb signals bulletin 165  grs_165_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Modern Crossing Protection By G-R-S Type XA and XB Signals Bulletin 165<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">10.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_165_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_165_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_165_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company railway signal engineering  grs_pub_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Railway Signal Engineering<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">10.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_Pub_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_Pub_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_Pub_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company sc signal bulletin 176  grs_176_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">SC Signal Bulletin 176<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">14.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_176_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_176_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_176_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company section 62, type b relays, plug-in type  section-62.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Section 62, Type B Relays, Plug-In Type<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">12.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Section-62.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Section-62.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/Section-62.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company section 65, type k relays  section-65.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Section 65, Type K Relays<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">12.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Section-65.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Section-65.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/Section-65.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company speed and simplicity in train direction first nx interlocking in the u.s.a. bulletin 172  grs_172_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Speed and Simplicity in Train Direction First NX Interlocking in the U.S.A. Bulletin 172<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_172_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_172_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/GRS_172_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company the nx system of electric interlocking bulletin 167  grs_nx.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">The NX System of Electric Interlocking Bulletin 167<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">3.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_NX.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_NX.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/GRS_NX.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company type b relays general information inspection and maintenance handbook 18  handbook_18_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Type B Relays General Information Inspection and Maintenance Handbook 18<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">18.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/handbook_18_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/handbook_18_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/handbook_18_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company type sa color-light signal handbook 29  grs_handbook_29_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Type SA Color-Light Signal Handbook 29<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">5.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_Handbook_29_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_Handbook_29_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GRS_Handbook_29_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company type sc color-light signal handbook 23  handbook_23_sec.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Type SC Color-Light Signal Handbook 23<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">9.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/handbook_23_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/handbook_23_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/handbook_23_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"general railway signal company types md and me dwarf signals two-indication color light bulletin 175  grs_md.pdf\">\n            <div class=\"sig-co\">General Railway Signal Company<\/div>\n            <div class=\"sig-de\">Types MD and ME Dwarf Signals Two-Indication Color Light Bulletin 175<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">5.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_MD.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GRS_MD.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/GRS_MD.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Hall Signal Company<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">7<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall signal company catalogue no. 4 and price list automatic electric disc and semaphore signaling apparatus 1901 1901 hall_01_sec.pdf\">\n            <div class=\"sig-co\">The Hall Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue No. 4 and Price List Automatic Electric Disc and Semaphore Signaling Apparatus 1901<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1901<\/span>              <span class=\"sig-chip\">15.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_01_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_01_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Hall_01_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall signal company catalogue no. 6 and price list the hall electric semaphore style &quot;f&quot;, electric disc signals, switches, tower indicators, switch boxes, ect. 1906 1906 hall_06_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Hall Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue No. 6 and Price List The Hall Electric Semaphore Style &quot;F&quot;, Electric Disc Signals, Switches, Tower Indicators, Switch Boxes, Ect. 1906<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1906<\/span>              <span class=\"sig-chip\">48.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/HALL_06_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/HALL_06_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/HALL_06_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall signal company the hall-electro-gas automatic-semaphore signal circular 10 1907 1907 hall_10_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Hall Signal Company<\/div>\n            <div class=\"sig-de\">The Hall-Electro-Gas Automatic-Semaphore Signal Circular 10 1907<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1907<\/span>              <span class=\"sig-chip\">14.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_10_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_10_OCR_SEC.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Hall_10_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall signal company the style &quot;k&quot; automatic signal 1912 1912 hall_k_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Hall Signal Company<\/div>\n            <div class=\"sig-de\">The STYLE &quot;K&quot; Automatic Signal 1912<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1912<\/span>              <span class=\"sig-chip\">35.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/HALL_K_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/HALL_K_OCR_SEC.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/HALL_K_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall signal company alternating current track circuit installation on long island railroad circular no. 12.  hall_12_sec.pdf\">\n            <div class=\"sig-co\">The Hall Signal Company<\/div>\n            <div class=\"sig-de\">Alternating Current Track Circuit Installation on Long Island Railroad Circular No. 12.<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">3.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_12_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_12_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Hall_12_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall switch and signal company section 34-a-19 style &quot;l&quot; signal mechanisms  hall_l_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Hall Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Section 34-A-19 Style &quot;L&quot; Signal Mechanisms<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">52.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_L_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_L_OCR_SEC.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Hall_L_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hall switch and signal company section 6 general catalogue telephone and telephone apparatus  hall_section_6.pdf\">\n            <div class=\"sig-co\">The Hall Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Section 6 General Catalogue Telephone and Telephone Apparatus<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">946.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_Section_6.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Hall_Section_6.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Hall_Section_6.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Magnetic Signal Company<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">6<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"magnetic signal co. &quot;magnetic wigwag flagman&quot; railroad highway grade crossing signals section a section j 1940 catalog 1940 magneticsignal1940_ocr_sec.pdf\">\n            <div class=\"sig-co\">Magnetic Signal Co.<\/div>\n            <div class=\"sig-de\">&quot;Magnetic WigWag Flagman&quot; Railroad Highway Grade Crossing Signals Section A Section J 1940 Catalog<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1940<\/span>              <span class=\"sig-chip\">31.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/MagneticSignal1940_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/MagneticSignal1940_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/MagneticSignal1940_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"magnetic signal co. installation and maintenance instructions for all types of magnetic flagmen  magneticinstructions_ocr_sec.pdf\">\n            <div class=\"sig-co\">Magnetic Signal Co.<\/div>\n            <div class=\"sig-de\">Installation and Maintenance Instructions For All Types of Magnetic Flagmen<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">1.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/MagneticInstructions_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/MagneticInstructions_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/MagneticInstructions_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"magnetic signal co. magnetic wig wag crossing flagman signal accessories and supplies  wigwag_sec.pdf\">\n            <div class=\"sig-co\">Magnetic Signal Co.<\/div>\n            <div class=\"sig-de\">Magnetic Wig Wag Crossing Flagman Signal Accessories and Supplies<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">7.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/wigwag_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/wigwag_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/wigwag_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"magnetic signal co. magnetic wig wag crossing flagman signal accessories and supplies catalogue c  magnetic1_ocr_sec.pdf\">\n            <div class=\"sig-co\">Magnetic Signal Co.<\/div>\n            <div class=\"sig-de\">Magnetic Wig Wag Crossing Flagman Signal Accessories and Supplies Catalogue C<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">19.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Magnetic1_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Magnetic1_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Magnetic1_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"magnetic signal co. number 1731 iron offset bracket for mounting wigwag mechanism  magnetic_1731_sec.pdf\">\n            <div class=\"sig-co\">Magnetic Signal Co.<\/div>\n            <div class=\"sig-de\">Number 1731 Iron Offset Bracket For Mounting Wigwag Mechanism<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">4.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Magnetic_1731_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Magnetic_1731_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Magnetic_1731_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"magnetic signal co. number jh-3570 twin lamp unit assembly for two way indication wigwag banners  magnetic_jh3570_sec.pdf\">\n            <div class=\"sig-co\">Magnetic Signal Co.<\/div>\n            <div class=\"sig-de\">Number JH-3570 Twin Lamp Unit Assembly For Two Way Indication Wigwag Banners<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">4.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Magnetic_JH3570_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Magnetic_JH3570_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Magnetic_JH3570_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Other Manufacturers &amp; Documents<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">28<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"johnson railroad signal company catalogue of interlocking and railroad signaling appliances est. 1889 1889 johnson_1889_ocr_sec.pdf\">\n            <div class=\"sig-co\">Johnson Railroad Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue of Interlocking and Railroad Signaling Appliances Est. 1889<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1889<\/span>              <span class=\"sig-chip\">146.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Johnson_1889_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Johnson_1889_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Johnson_1889_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the adams &amp; westlake company electric signal lamp equipped with decentered corning-lebby mirror adlake &quot;lebby focusing device&quot; 1893 1893 adlakeb_93_sec.pdf\">\n            <div class=\"sig-co\">The Adams &amp; Westlake Company<\/div>\n            <div class=\"sig-de\">Electric Signal Lamp Equipped with Decentered CORNING-LEBBY Mirror Adlake &quot;LEBBY Focusing Device&quot; 1893<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1893<\/span>              <span class=\"sig-chip\">6.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AdlakeB_93_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AdlakeB_93_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AdlakeB_93_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"national switch and signal company illustrations of standard apparatus for interlocking and block signals 1894 1894 nss_1894_ocr_sec.pdf\">\n            <div class=\"sig-co\">National Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Illustrations of Standard Apparatus for Interlocking and Block Signals 1894<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1894<\/span>              <span class=\"sig-chip\">83.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/NSS_1894_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/NSS_1894_OCR_SEC.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/NSS_1894_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the railroad signal supply company railway signal supplies catalog no. 32 1895 - 1927 1895 wrrs_1927_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Railroad Signal Supply Company<\/div>\n            <div class=\"sig-de\">Railway Signal Supplies Catalog No. 32 1895 - 1927<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1895<\/span>              <span class=\"sig-chip\">106.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/WRRS_1927_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/WRRS_1927_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/WRRS_1927_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"national switch and signal company &#039;96 interlocking machine 1896 1896 nss_1896_ocr_sec.pdf\">\n            <div class=\"sig-co\">National Switch and Signal Company<\/div>\n            <div class=\"sig-de\">&#039;96 Interlocking Machine 1896<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1896<\/span>              <span class=\"sig-chip\">87.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/NSS_1896_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/NSS_1896_OCR_SEC.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/NSS_1896_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"taylor signal company catalogue no. 1 the electric interlocking system 1902 1902 taylor1902_ocr_sec.pdf\">\n            <div class=\"sig-co\">Taylor Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue No. 1 The Electric Interlocking System 1902<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1902<\/span>              <span class=\"sig-chip\">55.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Taylor1902_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Taylor1902_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Taylor1902_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"pneumatic signal company take the safe course bulletin no. 7 pre 1905 1905 pneumatic_7_ocr_sec.pdf\">\n            <div class=\"sig-co\">Pneumatic Signal Company<\/div>\n            <div class=\"sig-de\">Take The Safe Course Bulletin No. 7 Pre 1905<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1905<\/span>              <span class=\"sig-chip\">50.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Pneumatic_7_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Pneumatic_7_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Pneumatic_7_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the federal railway signal company catalogue of the federal railway signal co. 1905 1905 federal_1905_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Federal Railway Signal Company<\/div>\n            <div class=\"sig-de\">Catalogue Of The Federal Railway Signal Co. 1905<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1905<\/span>              <span class=\"sig-chip\">100.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Federal_1905_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Federal_1905_OCR_Sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Federal_1905_OCR_Sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"locking by frederick c. lavarack 1907 1907 locking_ocr_sec.pdf\">\n            <div class=\"sig-co\">LOCKING<\/div>\n            <div class=\"sig-de\">By Frederick C. Lavarack 1907<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1907<\/span>              <span class=\"sig-chip\">118.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Locking_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Locking_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Locking_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"bryant zinc company catalogue no. 19 1911 1911 rrs_1911_philip.pdf\">\n            <div class=\"sig-co\">Bryant Zinc Company<\/div>\n            <div class=\"sig-de\">Catalogue No. 19 1911<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1911<\/span>              <span class=\"sig-chip\">11.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/RRS_1911_Philip.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/RRS_1911_Philip.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/RRS_1911_Philip.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the locke insulator mfg. co. the insulator book 1912 1912 locke1912_ocr_sec.pdf\">\n            <div class=\"sig-co\">The LOCKE Insulator Mfg. Co.<\/div>\n            <div class=\"sig-de\">The Insulator Book 1912<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1912<\/span>              <span class=\"sig-chip\">79.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Locke1912_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Locke1912_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Locke1912_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"chicago railway signal and supply company 1914 catalogue and price list of electric and mechanical railway signals highway crossing alarms signaling materials and signal accessories 1914 chicago_1914_ocr_sec.pdf\">\n            <div class=\"sig-co\">Chicago Railway Signal and Supply Company<\/div>\n            <div class=\"sig-de\">1914 Catalogue and Price List of Electric and Mechanical Railway Signals Highway Crossing Alarms Signaling Materials and Signal Accessories<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1914<\/span>              <span class=\"sig-chip\">66.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/chicago_1914_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/chicago_1914_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/chicago_1914_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"saxby &amp; farmer, ltd. control of single line railways by the webb-thompson miniature train staff apparatus &quot;s&quot; type catalogue c (1914 edition) 1914 s&amp;b_cat_c_sec.pdf\">\n            <div class=\"sig-co\">Saxby &amp; Farmer, Ltd.<\/div>\n            <div class=\"sig-de\">Control of Single Line Railways By The Webb-Thompson Miniature Train Staff Apparatus &quot;S&quot; Type Catalogue C (1914 Edition)<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1914<\/span>              <span class=\"sig-chip\">33.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/S%26B_Cat_c_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/S%26B_Cat_c_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/S&#038;B_Cat_c_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"williamsport &amp; susquehanna division instruction and examination of signals may 1st, 1914 1914 wmsignal_sec.pdf\">\n            <div class=\"sig-co\">Williamsport &amp; Susquehanna Division<\/div>\n            <div class=\"sig-de\">Instruction and Examination of Signals May 1st, 1914<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1914<\/span>              <span class=\"sig-chip\">3.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/WMSignal_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/WMSignal_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/WMSignal_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the general electric company limited railway signalling apparatus january, 1923 1923 gec_1923_philip.pdf\">\n            <div class=\"sig-co\">The General Electric Company Limited<\/div>\n            <div class=\"sig-de\">Railway Signalling Apparatus January, 1923<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1923<\/span>              <span class=\"sig-chip\">36 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/GEC_1923_Philip.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/GEC_1923_Philip.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/GEC_1923_Philip.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"chicago railway signal &amp; supply co. chicago, ill. 1928 1928 chicago_philip.pdf\">\n            <div class=\"sig-co\">Chicago Railway Signal &amp; Supply Co.<\/div>\n            <div class=\"sig-de\">Chicago, Ill. 1928<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1928<\/span>              <span class=\"sig-chip\">109.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Chicago_Philip.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Chicago_Philip.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Chicago_Philip.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"locke insulator corporation catalog no. 32 january 1, 1932 baltimore, maryland 1932 locke32_ocr_sec.pdf\">\n            <div class=\"sig-co\">LOCKE Insulator Corporation<\/div>\n            <div class=\"sig-de\">Catalog No. 32 January 1, 1932 Baltimore, Maryland<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1932<\/span>              <span class=\"sig-chip\">217 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Locke32_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Locke32_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Locke32_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"exide signal power for the maintainer  exide1929_sec.pdf\">\n            <div class=\"sig-co\">Exide Signal Power<\/div>\n            <div class=\"sig-de\">for the Maintainer<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Exide1929_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Exide1929_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Exide1929_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"federal telephone and radio company a division of it&amp;t it&amp;t sequence switch interlocking system  itt_ocr_sec.pdf\">\n            <div class=\"sig-co\">Federal Telephone and Radio Company<\/div>\n            <div class=\"sig-de\">A Division of IT&amp;T IT&amp;T Sequence Switch Interlocking System<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">11.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/ITT_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/ITT_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/ITT_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"griswold signal company flashing light rotating banner signals a - section  griswold_manual_ocr_sec.pdf\">\n            <div class=\"sig-co\">Griswold Signal Company<\/div>\n            <div class=\"sig-de\">Flashing Light Rotating Banner Signals A - Section<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">15.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/griswold_manual_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/griswold_manual_ocr_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/griswold_manual_ocr_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"griswold signal company flashing light signals d section  griswold_d.pdf\">\n            <div class=\"sig-co\">Griswold Signal Company<\/div>\n            <div class=\"sig-de\">Flashing Light Signals D Section<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">10.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Griswold_D.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Griswold_D.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Griswold_D.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"griswold signal company minneapolis, minn rotating banner diagrams and prints  griswold_prints1_sec.pdf\">\n            <div class=\"sig-co\">Griswold Signal Company<\/div>\n            <div class=\"sig-de\">Minneapolis, Minn Rotating Banner Diagrams and Prints<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">9.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/griswold_prints1_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/griswold_prints1_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/griswold_prints1_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"louisville frog, switch and signal company successor to southern signal corporation successor to peerless manufacturing corporation catalogs  sscorp.pdf\">\n            <div class=\"sig-co\">Louisville Frog, Switch and Signal Company<\/div>\n            <div class=\"sig-de\">Successor to Southern Signal Corporation Successor to Peerless Manufacturing Corporation Catalogs<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">39.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/SSCorp.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/SSCorp.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/SSCorp.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"signal indication slide card new york new haven and hartford railroad  slidecard.pdf\">\n            <div class=\"sig-co\">Signal Indication Slide Card<\/div>\n            <div class=\"sig-de\">New York New Haven and Hartford Railroad<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">2.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/slidecard.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/slidecard.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/slidecard.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the hutchinson train indicators national indicator company new york, u.s.a.  hutchinson_ocr_sec.pdf\">\n            <div class=\"sig-co\">The Hutchinson Train Indicators<\/div>\n            <div class=\"sig-de\">National Indicator Company New York, U.S.A.<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">54.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Hutchinson_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Hutchinson_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Hutchinson_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the railway supply company section number one crossing signal poles, warning signs, vibrating bells, high voltage adapters, and etc.  rrs_1910_philip.pdf\">\n            <div class=\"sig-co\">The Railway Supply Company<\/div>\n            <div class=\"sig-de\">Section Number One Crossing Signal Poles, Warning Signs, Vibrating Bells, High Voltage Adapters, and Etc.<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">40.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/RRS_1910_Philip.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/RRS_1910_Philip.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/RRS_1910_Philip.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"united states electric signals parts for: k and k2  uses_k2_ocr_sec.pdf\">\n            <div class=\"sig-co\">United States Electric Signals<\/div>\n            <div class=\"sig-de\">Parts For: K and K2<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">19.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/USES_K2_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/USES_K2_OCR_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/USES_K2_OCR_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"western railroad supply company railroad equipment signaling communications maintenance of way mechanical  wrrs_1967_sec.pdf\">\n            <div class=\"sig-co\">Western Railroad Supply Company<\/div>\n            <div class=\"sig-de\">Railroad Equipment Signaling Communications Maintenance of Way Mechanical<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">109.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/WRRS_1967_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/WRRS_1967_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/WRRS_1967_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>American Railway Signaling \u2014 Principles &amp; Practices<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">13<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter ii symbols, aspects and indications  aar_2_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter II Symbols, Aspects and Indications<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">12.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_2_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_2_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/AAR_2_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter ix rectifiers and battery chargers  aar_9_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter IX Rectifiers and Battery Chargers<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">9.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_9_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_9_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_9_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter vi direct current relays  aar_6_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter VI Direct Current Relays<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">7.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_6_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_6_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_6_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter vii non-coded direct current track circuits  aar_7_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter VII Non-Coded Direct Current Track Circuits<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_7_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_7_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_7_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter viii transformers  aar_8_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter VIII Transformers<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_8_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_8_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/AAR_8_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter x alternating current relays  aar_10_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter X Alternating Current Relays<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">10.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_10_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_10_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_10_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xi alternating current track circuits  aar_11_ocr_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XI Alternating Current Track Circuits<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">54.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_11_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_11_OCR_SEC.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_11_OCR_SEC.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xii semaphore signals  aar_12_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XII Semaphore Signals<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">9.7 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_12_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_12_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/AAR_12_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xiii light signals and light signal lamps  aar_13_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XIII Light Signals and Light Signal Lamps<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">10.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_13_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_13_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/AAR_13_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xv automatic block systems  aar_15_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XV Automatic Block Systems<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">8.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_15_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_15_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_15_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xvii mechanical and electro-mechanical interlocking  aar_17_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XVII Mechanical and Electro-Mechanical Interlocking<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">12.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_17_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_17_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_17_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xxiii railroad highway grade crossing protection  aar_23_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XXIII Railroad Highway Grade Crossing Protection<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">8.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_23_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_23_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/AAR_23_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"american railway signaling principles and practices chapter xxiv power distribution systems and lightning protection  aar_24_sec.pdf\">\n            <div class=\"sig-co\">American Railway Signaling Principles and Practices<\/div>\n            <div class=\"sig-de\">Chapter XXIV Power Distribution Systems and Lightning Protection<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_24_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/AAR_24_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/AAR_24_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Railway Age Advertisements<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">15<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 03\/06\/1926 1926 rwy_age_03061926_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">03\/06\/1926<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1926<\/span>              <span class=\"sig-chip\">11.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_03061926_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_03061926_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_03061926_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 03\/10\/1926 1926 rwy_age_03101926_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">03\/10\/1926<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1926<\/span>              <span class=\"sig-chip\">9.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_03101926_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_03101926_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_03101926_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 06\/18\/1927 1927 rwy_age_06181927_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">06\/18\/1927<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1927<\/span>              <span class=\"sig-chip\">21.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_06181927_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_06181927_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_06181927_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 03\/14\/1931 1931 rwy_age_03141931_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">03\/14\/1931<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1931<\/span>              <span class=\"sig-chip\">14.5 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_03141931_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_03141931_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_03141931_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 07\/03\/1937 1937 rwy_age_07031937_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">07\/03\/1937<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1937<\/span>              <span class=\"sig-chip\">10.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_07031937_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_07031937_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_07031937_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 01\/22\/1938 1938 rwy_age_01221938_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">01\/22\/1938<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1938<\/span>              <span class=\"sig-chip\">6.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_01221938_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_01221938_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_01221938_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 01\/04\/1941 1941 rwy_age_01041941_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">01\/04\/1941<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1941<\/span>              <span class=\"sig-chip\">14.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_01041941_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_01041941_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_01041941_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 07\/26\/1941 1941 rwy_age_07261941_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">07\/26\/1941<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1941<\/span>              <span class=\"sig-chip\">6.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_07261941_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_07261941_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_07261941_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 11\/14\/1942 1942 rwy_age_11141942_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">11\/14\/1942<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1942<\/span>              <span class=\"sig-chip\">5.8 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_11141942_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_11141942_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_11141942_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 07\/13\/1946 1946 rwy_age_07131946_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">07\/13\/1946<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1946<\/span>              <span class=\"sig-chip\">11 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_07131946_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_07131946_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_07131946_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 11\/04\/1950 1950 rwy_age_11041950_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">11\/04\/1950<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1950<\/span>              <span class=\"sig-chip\">5.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_11041950_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_11041950_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_11041950_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement 01\/12\/1953 1953 rwy_age_01121953_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">01\/12\/1953<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1953<\/span>              <span class=\"sig-chip\">6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_01121953_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Rwy_age_01121953_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Rwy_age_01121953_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement grs  grs_1_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">GRS<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">5.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Grs_1_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Grs_1_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Grs_1_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement grs  grs_2_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">GRS<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">6.1 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Grs_2_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Grs_2_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Grs_2_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"railway age advertisement grs nx  grs_nx_1_sec.pdf\">\n            <div class=\"sig-co\">Railway Age Advertisement<\/div>\n            <div class=\"sig-de\">GRS NX<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">9.6 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/grs_NX_1_sec.PDF\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/grs_NX_1_sec.PDF\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/grs_NX_1_sec.PDF\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Interlocking &amp; Tower Diagrams<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">4<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"c.c.c. &amp; st.l. ry. manipulation chart - durbin, ohio october 17, 1918 1918 durbin_sec.pdf\">\n            <div class=\"sig-co\">C.C.C. &amp; ST.L. RY.<\/div>\n            <div class=\"sig-de\">Manipulation Chart - Durbin, Ohio October 17, 1918<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1918<\/span>              <span class=\"sig-chip\">6.3 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/durbin_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/durbin_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/durbin_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"i.c.r.r. ashkum, illinois interlocking towers elevations &amp; section, plans &amp; details may-16-1923 1923 ashkum_tower_sec.pdf\">\n            <div class=\"sig-co\">I.C.R.R.<\/div>\n            <div class=\"sig-de\">Ashkum, Illinois Interlocking Towers Elevations &amp; Section, Plans &amp; Details May-16-1923<\/div>            <div class=\"sig-meta\">\n              <span class=\"sig-chip yr\">1923<\/span>              <span class=\"sig-chip\">10.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/Ashkum_tower_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/Ashkum_tower_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/Ashkum_tower_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the pennsylvania railroad eastern region chesapeake district block stations, interlockings, etc.  zcg_0012_sec.pdf\">\n            <div class=\"sig-co\">The Pennsylvania Railroad<\/div>\n            <div class=\"sig-de\">Eastern Region Chesapeake District Block Stations, Interlockings, ETC.<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">21 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/ZCG_0012_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/ZCG_0012_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/ZCG_0012_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"the pennsylvania railroad philadelphia region atlantic district interlockings  zcg_0010_sec.pdf\">\n            <div class=\"sig-co\">The Pennsylvania Railroad<\/div>\n            <div class=\"sig-de\">Philadelphia Region Atlantic District Interlockings<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">4.2 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/ZCG_0010_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/ZCG_0010_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/ZCG_0010_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n          <section class=\"sig-grp\" data-cat>\n        <div class=\"sig-grp-head\">\n          <h3>Conrail<\/h3>\n          <span class=\"sig-rule\"><\/span>\n          <span class=\"sig-n\">2<\/span>\n        <\/div>\n        <div class=\"sig-grid\">\n                    <article class=\"sig-doc\" data-doc data-search=\"conrail conrail albany division interlockings  conrail_interlock_sec.pdf\">\n            <div class=\"sig-co\">Conrail<\/div>\n            <div class=\"sig-de\">Conrail Albany Division Interlockings<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">111.4 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/conrail_interlock_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/conrail_interlock_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/conrail_interlock_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                    <article class=\"sig-doc\" data-doc data-search=\"conrail conrail position light signal aspects  conrail_pl_signal_sec.pdf\">\n            <div class=\"sig-co\">Conrail<\/div>\n            <div class=\"sig-de\">Conrail Position Light Signal Aspects<\/div>            <div class=\"sig-meta\">\n                            <span class=\"sig-chip\">8.9 MB<\/span>            <\/div>\n            <div class=\"sig-foot\">\n              <span class=\"sig-actions\">\n                <a class=\"sig-btn view\" href=\"https:\/\/oscaleresource.com\/Signals\/conrail_pl_signal_sec.pdf\" target=\"_blank\" rel=\"noopener\">View<\/a>\n                <a class=\"sig-btn dl\" href=\"https:\/\/oscaleresource.com\/Signals\/conrail_pl_signal_sec.pdf\" download>Download<\/a>\n              <\/span>\n                            <a class=\"sig-src\" href=\"http:\/\/rrsignalpix.com\/pdf\/conrail_pl_signal_sec.pdf\" target=\"_blank\" rel=\"noopener\" title=\"View on the original site\">\n                <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\/><path d=\"M15 3h6v6\"\/><path d=\"M10 14 21 3\"\/><\/svg>Source\n              <\/a>\n                          <\/div>\n          <\/article>\n                  <\/div>\n      <\/section>\n        <div class=\"sig-none\">No documents match your search.<\/div>\n  <\/div>\n  <script>\n  (function(){\n    document.querySelectorAll('.sigarch').forEach(function(root){\n      if(root.dataset.sigInit) return; root.dataset.sigInit='1';\n      var q=root.querySelector('.sig-search input');\n      var docs=[].slice.call(root.querySelectorAll('[data-doc]'));\n      var groups=[].slice.call(root.querySelectorAll('[data-cat]'));\n      var shown=root.querySelector('.sig-shown');\n      var none=root.querySelector('.sig-none');\n      if(!q) return;\n      q.addEventListener('input',function(){\n        var t=q.value.trim().toLowerCase(),n=0;\n        docs.forEach(function(d){\n          var hit=t===''||d.getAttribute('data-search').indexOf(t)!==-1;\n          d.style.display=hit?'':'none'; if(hit)n++;\n        });\n        groups.forEach(function(g){\n          g.style.display=g.querySelector('[data-doc]:not([style*=\"none\"])')?'':'none';\n        });\n        if(shown)shown.textContent=n;\n        if(none)none.style.display=n===0?'block':'none';\n      });\n    });\n  })();\n  <\/script>\n  \n","protected":false},"excerpt":{"rendered":"<p>Scanned catalogs, bulletins, and handbooks from the signal builders of the steam and early-diesel eras \u2014 Union Switch &amp; Signal, General Railway Signal, Hall, and many more. Read online or download. 166 documents in the collection. Documents digitized by the collectors at rrsignalpix.com; each entry links back to its source. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-templates\/template-fullwidth.php","meta":{"footnotes":""},"class_list":["post-3497","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/pages\/3497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/comments?post=3497"}],"version-history":[{"count":6,"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/pages\/3497\/revisions"}],"predecessor-version":[{"id":3512,"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/pages\/3497\/revisions\/3512"}],"wp:attachment":[{"href":"https:\/\/oscaleresource.com\/WP\/index.php\/wp-json\/wp\/v2\/media?parent=3497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}