NOTE:
Although all of these digitized articles are 60 or more years old, and likely have minimal commercial value today, the reader should bear in mind that material dated after 1923 remains under copyright by Simmons-Boardman Publishing.
These articles and the information contained therein may be freely reproduced or used in printed or electronic form for non-commercial or educational purposes, provided the copyright holder and original author (if known) are acknowledged, and provided that such publication also refers readers to the original document on this site.
Simply making interesting material available to those who share my interest in the railway signal systems of the past has been my sole objective in this long project.
1941 | Two New Interlockings on the C&WI 5.1 MB |
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1941 | Two New Interlockings on the C&WI 5.1 MB |
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1941 | 1941 index 3.7 MB |
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1941 | Automatic Signaling and Tunnel Protection On the Denver & Salt Lake 6.7 MB |
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1941 | Simplified Signaling 426.9 KB |
1941 | Accident at Interlocking 1.3 MB |
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1941 | Electric Locking With No Derails 735.7 KB |
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1941 | Interlocking and Automatic Signals on the Alton 3.0 MB |
1941 | Interlocking and Automatic Signals on the Alton 3.0 MB |
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1941 | Carrier Communication Equipment Installed on the Santa Fe 4.7 MB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
1941 | Railway Exhibit Presented to Museum of Science and Industry 636.5 KB |
1941 | A Review of 1940 and Prospects for the Future 1.3 MB |
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1941 | A Simplified Signaling Arrangement For the Direction of Trains by Signal Indications 5.5 MB |
1941 | Automatic Block and Centralized Traffic Control on the Chesapeake & Ohio 4.3 MB |
1941 | Automatic Signaling and Tunnel Protection On the Denver & Salt Lake 6.7 MB |
1941 | Automatics Installed on North Shore 1.6 MB |
1941 | Flashing Yellow as a Fourth Aspect on the IC 2.6 MB |
1941 | Monon Changes Approved 760.8 KB |
1941 | Non-Stop Permissive Signals 2.8 MB |
1941 | Non-Stop Permissive Signals 1.4 MB |
1941 | Rule 204 1.7 MB |
1941 | DT&I Installs Automatic Interlocking 5.0 MB |
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1941 | Loss of Shunt 912.3 KB |
1941 | Accident at Interlocking 1.3 MB |
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1941 | Belt Railway of Chicago Installs Interlocking 12.3 MB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Rule 204 1.7 MB |
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1941 | Non-Stop Permissive Signals 2.8 MB |
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1941 | A Review of 1940 and Prospects for the Future 1.3 MB |
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1941 | Automatic Block and Centralized Traffic Control on the Chesapeake & Ohio 4.3 MB |
1941 | Automatic Signaling and Tunnel Protection On the Denver & Salt Lake 6.7 MB |
1941 | Centralized Traffic Control Installed on the Missouri Pacific 3.7 MB |
1941 | Centralized Traffic Control On the Chesapeake & Ohio 7.1 MB |
1941 | CTC Installed on Norfolk & Western 5.1 MB |
1941 | Protection at Hand-Thrown Switches in CTC Territory 1.6 MB |
1941 | Railway Exhibit Presented to Museum of Science and Industry 636.5 KB |
1941 | Simplified Signaling 426.9 KB |
1941 | Non-Stop Permissive Signals 2.8 MB |
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1941 | Automatics Installed on North Shore 1.6 MB |
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1941 | Splicing a Submarine Cable 4.6 MB |
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1941 | Belt Railway of Chicago Installs Interlocking 12.3 MB |
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1941 | Flashing Yellow as a Fourth Aspect on the IC 2.6 MB |
1941 | Illinois Central Uses Automatic Telephone System on Chicago Terminal Area 5.8 MB |
1941 | Modern Entrance-Exit Interlocking Replaces Mechanical Plant On Indiana Harbor Belt 6.9 MB |
1941 | Railway Exhibit Presented to Museum of Science and Industry 636.5 KB |
1941 | Splicing a Submarine Cable 4.6 MB |
1941 | Two New Interlockings on the C&WI 5.1 MB |
1941 | A Review of 1940 and Prospects for the Future 1.3 MB |
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1941 | Monon Changes Approved 760.8 KB |
1941 | Pennsylvania Installs CTC at Louisville, KY 4.9 MB |
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1941 | P4 Code-Following Relay 1.1 MB |
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1941 | Code-Following Polar Track Circuit Relay 1.4 MB |
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1941 | Signaling on 47 Miles of St. Louis Southwestern 12.6 MB |
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1941 | Automatic Signaling and Tunnel Protection On the Denver & Salt Lake 6.7 MB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
1941 | DT&I Installs Automatic Interlocking 5.0 MB |
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1941 | Signaling on 47 Miles of St. Louis Southwestern 12.6 MB |
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1941 | Belt Railway of Chicago Installs Interlocking 12.3 MB |
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1941 | Two New Interlockings on the C&WI 5.1 MB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | CTC Installed on Norfolk & Western 5.1 MB |
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1941 | Frank Rhea (obituary) 1.0 MB |
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1941 | P. M. Gault obituary 1.2 MB |
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1941 | Automatics Installed on North Shore 1.6 MB |
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1941 | Automatics Installed on North Shore 1.6 MB |
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1941 | Interlocking and Automatic Signals on the Alton 3.0 MB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
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1941 | War on the British Railways 986.3 KB |
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1941 | Ground Tester 704.0 KB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | Accident at Interlocking 1.3 MB |
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1941 | Flashing Yellow as a Fourth Aspect on the IC 2.6 MB |
1941 | Illinois Central Uses Automatic Telephone System on Chicago Terminal Area 5.8 MB |
1941 | Non-Stop Permissive Signals 2.8 MB |
1941 | P. M. Gault obituary 1.2 MB |
1941 | Signaling on 47 Miles of St. Louis Southwestern 12.6 MB |
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1941 | 1941 index 3.7 MB |
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1941 | Automatics Installed on North Shore 1.6 MB |
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1941 | A Review of 1940 and Prospects for the Future 1.3 MB |
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1941 | All-Relay Signal System Installed on Terminal Railroad of St. Louis 1.2 MB |
1941 | Belt Railway of Chicago Installs Interlocking 12.3 MB |
1941 | Electric Locking With No Derails 735.7 KB |
1941 | Loss of Shunt 912.3 KB |
1941 | Modern Entrance-Exit Interlocking Replaces Mechanical Plant On Indiana Harbor Belt 6.9 MB |
1941 | Remote Control Installation 2.4 MB |
1941 | Southern Pacific Installs Interlocking at Drawbridge 6.3 MB |
1941 | Track Model Lamps 429.7 KB |
1941 | Two New Interlockings on the C&WI 5.1 MB |
1941 | A Simplified Signaling Arrangement For the Direction of Trains by Signal Indications 5.5 MB |
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1941 | ICC Manual Block Regulations 518.5 KB |
1941 | Monon Changes Approved 760.8 KB |
1941 | Non-Stop Permissive Signals 1.4 MB |
1941 | Rule 204 1.7 MB |
1941 | Simplified Signaling 426.9 KB |
1941 | Monon Changes Approved 760.8 KB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
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1941 | Pennsylvania Installs CTC at Louisville, KY 4.9 MB |
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1941 | CTC Installed on Norfolk & Western 5.1 MB |
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1941 | ICC Manual Block Regulations 518.5 KB |
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1941 | Flashing Yellow as a Fourth Aspect on the IC 2.6 MB |
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1941 | Track Model Lamps 429.7 KB |
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1941 | Remote Control Installation 2.4 MB |
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1941 | Centralized Traffic Control Installed on the Missouri Pacific 3.7 MB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
1941 | P. M. Gault obituary 1.2 MB |
1941 | Track Model Lamps 429.7 KB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | DT&I Installs Automatic Interlocking 5.0 MB |
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1941 | Modern Entrance-Exit Interlocking Replaces Mechanical Plant On Indiana Harbor Belt 6.9 MB |
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1941 | Simplified Signaling 426.9 KB |
1941 | DT&I Installs Automatic Interlocking 5.0 MB |
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1941 | CTC Installed on Norfolk & Western 5.1 MB |
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1941 | Remote Control Installation 2.4 MB |
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1941 | P. M. Gault obituary 1.2 MB |
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1941 | Accident at Interlocking 1.3 MB |
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1941 | Monon Changes Approved 760.8 KB |
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1941 | Frank Rhea (obituary) 1.0 MB |
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1941 | Non-Stop Permissive Signals 2.8 MB |
1941 | P. M. Gault obituary 1.2 MB |
1941 | Pennsylvania Installs CTC at Louisville, KY 4.9 MB |
1941 | Protection at Hand-Thrown Switches in CTC Territory 1.6 MB |
1941 | Non-Stop Permissive Signals 2.8 MB |
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1941 | P. M. Gault obituary 1.2 MB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | CTC Installed on Norfolk & Western 5.1 MB |
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1941 | Two New Interlockings on the C&WI 5.1 MB |
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1941 | Code-Following Polar Track Circuit Relay 1.4 MB |
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1941 | P4 Code-Following Relay 1.1 MB |
1941 | Remote Control Installation 2.4 MB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | Simplified Signaling 426.9 KB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | Remote Control Installation 2.4 MB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
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1941 | Signaling on 47 Miles of St. Louis Southwestern 12.6 MB |
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1941 | Code-Following Polar Track Circuit Relay 1.4 MB |
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1941 | P4 Code-Following Relay 1.1 MB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
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1941 | Non-Stop Permissive Signals 1.4 MB |
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1941 | Belt Railway of Chicago Installs Interlocking 12.3 MB |
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1941 | Code-Following Polar Track Circuit Relay 1.4 MB |
1941 | Loss of Shunt 912.3 KB |
1941 | P4 Code-Following Relay 1.1 MB |
1941 | All-Relay Signal System Installed on Terminal Railroad of St. Louis 1.2 MB |
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1941 | Automatics Installed on the Wabash 4.0 MB |
1941 | Belt Railway of Chicago Installs Interlocking 12.3 MB |
1941 | Interlocking and Automatic Signals on the Alton 3.0 MB |
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1941 | Automatics Installed on North Shore 1.6 MB |
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1941 | War on the British Railways 986.3 KB |
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