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.
15th Street, Chicago, IL 1
16th Street (C&WI), Chicago, IL 1
55th Street, Chicago, IL 1
1941 1
1941 index
3.7 MB
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absolute permissive block signaling 2
accident 1
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Accident at Interlocking
1.3 MB
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all-relay interlocking 2
Alton 2
Alton, IL 1
Atchison, Topeka & Santa Fe 3
automatic block signaling 10
automatic block signals 1
automatic interlocking 2
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DT&I Installs Automatic Interlocking
5.0 MB
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Loss of Shunt
912.3 KB
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Baldwin, LA 1
Baltimore & Ohio 1
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Accident at Interlocking
1.3 MB
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Barboursville, WV 1
Belt Jct., Chicago, IL 1
Belt Jct., Indianapolis, IN 1
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Monon Changes Approved
760.8 KB
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Belt Railway of Chicago 2
Bloomington, IN 1
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Monon Changes Approved
760.8 KB
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Borden, IN 1
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Monon Changes Approved
760.8 KB
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braking distance 1
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Rule 204
1.7 MB
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Carbon Cliff, IL 1
carrier communication 1
Central of New Jersey 1
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Non-Stop Permissive Signals
2.8 MB
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centralized traffic control 9
Chesapeake & Ohio 2
Chicago & North Western 1
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Non-Stop Permissive Signals
2.8 MB
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Chicago & Western Indiana 3
Chicago North Shore & Milwaukee 1
Chicago Rapid Transit 1
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Splicing a Submarine Cable
4.6 MB
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Chicago, Burlington & Quincy 1
Chicago, IL 7
Chicago, Indianapolis & Louisville 2
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A Review of 1940 and Prospects for the Future
1.3 MB
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Monon Changes Approved
760.8 KB
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Chicago, Milwaukee, St. Paul & Pacific 1
Chicago, Rock Island & Pacific 1
Clagg, KY 1
code-following track relay 1
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P4 Code-Following Relay
1.1 MB
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coded track circuits 1
Cole, MO 1
communication 1
Davenport, Rock Island & Northwestern 1
Delta, MO 1
Denver & Salt Lake 2
Denver, CO 1
Detroit, Toledo & Ironton 1
Dexter Jct., MO 1
drawbridge 1
East Moline, IL 1
East Portal, CO 1
electric interlocking 1
electro-pneumatic interlocking 1
Fairmount, IL 1
Fogg, IN 1
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Monon Changes Approved
760.8 KB
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Forest, VA 1
Frank Rhea 1
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Frank Rhea (obituary)
1.0 MB
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Gault, P. M. 1
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P. M. Gault obituary
1.2 MB
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gauntlet track 1
Glencoe, IL 1
Godfrey, IL 1
Gordonsville, VA 1
grade signals 1
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Non-Stop Permissive Signals
1.4 MB
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Great Britain 1
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War on the British Railways
986.3 KB
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ground tester 1
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Ground Tester
704.0 KB
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Hammond, IN 1
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Monon Changes Approved
760.8 KB
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highway crossings 1
Homer, IL 1
Illinois Central 5
Illmo, MO 1
index 1
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1941 index
3.7 MB
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Indian Hill, IL 1
Indiana Harbor Belt 1
interlocking 10
Interstate Commerce Commission 6
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A Simplified Signaling Arrangement For the Direction of Trains by Signal Indications
5.5 MB
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ICC Manual Block Regulations
518.5 KB
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Monon Changes Approved
760.8 KB
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Non-Stop Permissive Signals
1.4 MB
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Rule 204
1.7 MB
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Simplified Signaling
426.9 KB
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Lafayette Jct., IN 1
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Monon Changes Approved
760.8 KB
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Lafayette, IN 1
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Monon Changes Approved
760.8 KB
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Lindsay, VA 1
Louisville & Nashville 1
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Non-Stop Permissive Signals
1.4 MB
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Louisville, KY 1
Lynchburg, VA 1
manual block signaling 1
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ICC Manual Block Regulations
518.5 KB
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Markham Yard, IL 1
Matteson, IL 1
May Street, St. Louis, MO 1
Michigan Central 1
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Track Model Lamps
429.7 KB
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Minneapolis, St. Paul & Sault Ste. Marie 1
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Remote Control Installation
2.4 MB
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Missouri Pacific 3
model boards 1
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Track Model Lamps
429.7 KB
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model railroad 1
Moffat Tunnel 1
Moline, IL 1
Monon 1
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Monon Changes Approved
760.8 KB
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Monon, IN 1
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Monon Changes Approved
760.8 KB
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Morris, OH 1
Museum of Science & Industry, Chicago, IL 1
New York Central 2
New York, Chicago & St. Louis 1
Norfolk & Western 1
North Fond du Lac, WI 1
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Remote Control Installation
2.4 MB
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NX interlocking 1
obituary 1
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P. M. Gault obituary
1.2 MB
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Odin, IL 1
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Accident at Interlocking
1.3 MB
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Orleans, IN 1
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Monon Changes Approved
760.8 KB
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Osage, MO 1
Peach Creek, WV 1
Pennsylvania 5
permissive signals 1
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Non-Stop Permissive Signals
2.8 MB
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personal 1
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P. M. Gault obituary
1.2 MB
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Philo, IL 1
Phoebe, VA 1
pneumatic interlocking 1
relay 2
remote control 1
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Remote Control Installation
2.4 MB
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Rock Island, IL 1
Ryan, IL 1
Schwendt, B. J. 1
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Simplified Signaling
426.9 KB
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Sidney, IL 1
Soo Line 1
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Remote Control Installation
2.4 MB
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Southern 1
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Non-Stop Permissive Signals
1.4 MB
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Southern Pacific 1
St. Louis Southwestern 1
St. Louis, MO 2
Style CDP relay 1
Style P4 relay 1
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P4 Code-Following Relay
1.1 MB
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switch locks 1
switch protection 1
telephones 1
Terminal Railroad Association of St. Louis 2
Terre Haute, IN 1
Tilton, IL 1
timetable and train order 1
Tolono, IL 1
Topeka, KS 1
Union Pacific 1
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Non-Stop Permissive Signals
1.4 MB
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Union Switch & Signal 4
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Belt Railway of Chicago Installs Interlocking
12.3 MB
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Code-Following Polar Track Circuit Relay
1.4 MB
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Loss of Shunt
912.3 KB
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P4 Code-Following Relay
1.1 MB
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Wabash 3
Wann, IL 1
Watertown, IL 1
Winnetka, IL 1
World War II 1
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War on the British Railways
986.3 KB
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