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.
1935 | Western Indiana Installs All-Relay Interlocking 11.4 MB |
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1937 | Pennsylvania CTC Installation 7.0 MB |
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1947 | Annual Review and Outlook 425.1 KB |
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1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1939 | San Francisco-Oakland Bay Bridge Interlocking Plants 9.4 MB |
1939 | San Francisco-Oakland Bay Bridge Signaling and Interlocking 7.9 MB |
1940 | Southern Pacific Washes Insulators 1.5 MB |
1926 | Train Control Progress in 1925 3.1 MB |
1949 | A. H. Rudd obituary 947.2 KB |
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1943 | Herbert S. Balliet obituary 609.4 KB |
1950 | Obituary: B. J. Schwendt 961.7 KB |
1928 | Obituary: Frank P. Patenall 627.0 KB |
1940 | Obituary: Leroy Wyant 1.0 MB |
1941 | P. M. Gault obituary 1.2 MB |
1937 | Personal: C&NW 1.3 MB |
1931 | Thomas A. Edison (obituary) 1.1 MB |
1936 | Wilmer W. Salmon, President of General Railway Signal Company, Dies 2.8 MB |
1935 | Obsolescence in Signaling 3.4 MB |
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1935 | Obsolescence in Signaling 3.4 MB |
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1941 | Accident at Interlocking 1.3 MB |
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1947 | ICC Holds Signal Hearing 507.5 KB |
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1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1950 | New Rail-Web Bond 1.3 MB |
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1946 | Ohm's Law Chart 410.4 KB |
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1932 | Centralized Traffic Control Saves Time on the Santa Fe 2.6 MB |
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1922 | Signal Construction on the Santa Fe 797.6 KB |
1922 | Controlled Manual Block in Hauenstein Tunnel 3.4 MB |
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1950 | Signaling and Rules 1.4 MB |
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1915 | British and American Railroad Signaling 3.6 MB |
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1928 | C&O Signaling and Train Control Facilitate Operation 4.1 MB |
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1926 | Economics of Single Track Signals 2.0 MB |
1932 | Automatic Interlockers 1.0 MB |
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1925 | The Train Control Situation 853.0 KB |
1926 | Train Control Progress in 1925 3.1 MB |
1937 | Signal Construction on the Wabash 12.2 MB |
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1954 | IC Combines Interlockings 1.5 MB |
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1917 | Block Signals on the Monon 669.9 KB |
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1942 | Chicago, Indianapolis & Louisiville Modernizes Automatic Signaling 3.9 MB |
1941 | Monon Changes Approved 760.8 KB |
1935 | Automatic OSing Devices Usde by the Rock Island 2.2 MB |
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1950 | OSing Device 1.4 MB |
1941 | Centralized Traffic Control Installed on the Missouri Pacific 3.7 MB |
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1939 | Drag Detectors Protect Bridges 3.2 MB |
1924 | Controlled Manual Block Signaling With Train Control 5.5 MB |
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1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1926 | Train Control Progress in 1925 3.1 MB |
1939 | Burlington Replaces Semaphores With Color Lights 3.4 MB |
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1935 | Crossing Signals on the C&NW at Oshkosh, Wis 3.4 MB |
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1922 | Signal Construction on the Santa Fe 797.6 KB |
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1917 | Light Signals On CM&StP 781.9 KB |
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1920 | The New Electrification on the St. Paul 485.4 KB |
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
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1934 | Automatic Interlockings on the Santa Fe 2.2 MB |
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1915 | Electric Train Staff Installation 3.3 MB |
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1952 | Double-Track CTC on Illinois Central 759.7 KB |
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1930 | Interlockers Replaced by Centralized Traffic Control on the Illinois Central 1.8 MB |
1923 | News of the Month (July 1923) 1.9 MB |
1925 | Signaling Two Tracks to Capacity 2.8 MB |
1939 | Burlington Replaces Semaphores With Color Lights 3.4 MB |
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1950 | Consolidation of Interlockings 2.5 MB |
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1936 | Yard Entrance in Montreal Remotely Controlled 8.2 MB |
1915 | Beam-Light Signals on the Pennsylvania 919.8 KB |
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1935 | Obsolescence in Signaling 3.4 MB |
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1940 | Southern Pacific Petition Denied 3.0 MB |
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1925 | CB&Q Controls Switches Remotely 3.7 MB |
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