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.
30th Street Station, Philadelphia, PA 1
1931 1
1931 index
6.6 MB
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accident 1
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A Lesson from a False-Clear Failure
577.9 KB
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all-relay interlocking 1
alternating current track circuit 1
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Power Interlocking Eliminates Delays
488.8 KB
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alternating current track circuits 1
American Railway Engineering Association 1
Arlington Heights, IL 1
Arlington Park, IL 1
Atchison, Topeka & Santa Fe 2
Atlantic Coast Line 2
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Call-on Route Control
1.4 MB
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Precision-Base Lamps
1.4 MB
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Aurora, IL 1
automatic block signaling 1
automatic interlocking 3
automatic train control 2
automatic train stop 1
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GN Asks to Remove Train Control
215.6 KB
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Baltimore & Ohio 2
Baltimore & Ohio Chicago Terminal 2
Barrington, IL 1
Belmont, CA 1
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Speed Control of Crossing Signals
586.7 KB
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Berwick, OH 1
Bethlehem, PA 1
Birmingham, MO 1
Boston & Maine 2
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Economy of Smaller Towers
539.7 KB
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Efficiency Tests
1.9 MB
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Broad St., Philadelphia, PA 2
Buffalo, Rochester & Pittsburgh 1
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Efficiency Tests
1.9 MB
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cab signaling 1
cabin interlocking 1
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The Light-Traffic Crossing
276.3 KB
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California 1
Camp Douglas, WI 1
Canadian National 1
Canadian Pacific 1
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Economy of Smaller Towers
539.7 KB
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Central of New Jersey 2
centralized traffic control 9
Chemin de fer de l'Est 1
Cherry Street, Toronto, Ontario 1
Chestnut Hill, PA 1
Chicago & Illinois Midland 1
Chicago & North Western 3
Chicago Great Western 1
Chicago, Burlington & Quincy 5
Chicago, IL 2
Chicago, Indianapolis & Louisville 1
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The Light-Traffic Crossing
276.3 KB
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Chicago, Milwaukee, St. Paul & Pacific 8
Chicago, Rock Island & Pacific 5
Chicago, St. Paul, Minneapolis & Omaha 2
Cleveland, Cincinnati, Chicago & St. Louis 3
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Economy of Smaller Towers
539.7 KB
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Efficiency Tests
1.9 MB
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Sequence of Levers
552.2 KB
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crossing flashers 1
Danville, IL 1
Delaware & Hudson 1
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Protecting CTC Switches
2.9 MB
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Delaware, Lackawanna & Western 2
Des Plaines, IL 1
Detroit, MI 1
Deval, IL 1
Dover, NJ 1
Downers Grove, IL 1
Doylestown, PA 1
drawbridges 1
economics 1
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Competition
774.2 KB
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Edison, Thomas 1
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Thomas A. Edison (obituary)
1.1 MB
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electric interlocking 2
electric switch locks 1
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The Light-Traffic Crossing
276.3 KB
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electro-pneumatic interlocking 2
false proceed failures 1
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A Lesson from a False-Clear Failure
577.9 KB
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Fishers, PA 1
France 1
Galesburg, IL 1
Gallia Street interlocking, Portsmouth, OH 1
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Power Interlocking Eliminates Delays
488.8 KB
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General Railway Signal 3
Gladstone, NJ 1
Glenside, PA 1
government subsidies 1
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Competition
774.2 KB
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Grand Trunk Western 1
Great Britain 2
Great Northern 3
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Efficiency Tests
1.9 MB
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GN Asks to Remove Train Control
215.6 KB
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Precision-Base Lamps
1.4 MB
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Great Western 2
Griswold Signal 1
Hall disc signals 1
Hammond, IN 1
Hatboro, PA 1
HD Jct., MO 1
Herington, KS 2
highway crossings 5
Hoboken, NJ 1
Hudson, WI 1
Illinois Central 2
index 1
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1931 index
6.6 MB
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Indianapolis Union 1
Indianapolis, IN 1
interlocking 2
Interstate Commerce Commission 2
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A Lesson from a False-Clear Failure
577.9 KB
|
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GN Asks to Remove Train Control
215.6 KB
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IU Tower, Indianapolis, IN 1
Jenkintown, PA 1
John Street, Toronto, Ontario 1
Lackawaxen, PA 1
Lafayette, IN 1
Lanes Crossing, NJ 1
Langhorne, PA 1
Lansdale, PA 1
London Metropolitan 1
London Underground 1
London, England 2
Louisville & Nashville 2
mechanical interlocking 3
Michigan Central 1
Minnesota Railroad & Warehouse Commission 1
Missouri Pacific 7
Monon 1
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The Light-Traffic Crossing
276.3 KB
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Montclair, NJ 1
Mott Haven, NY 2
Nashville, Chattanooga & St. Louis 1
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Fight for Your Job
3.0 MB
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Nelson, IL 1
New Rockford, MN 1
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GN Asks to Remove Train Control
215.6 KB
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New York Central 9
New York, Chicago & St. Louis 1
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Efficiency Tests
1.9 MB
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New York, New Haven & Hartford 1
New York, NY 2
Newark, NJ 1
Newtown Jct., PA 1
Niagara Falls, Ontario 1
Norfolk & Western 2
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Call-on Route Control
1.4 MB
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Power Interlocking Eliminates Delays
488.8 KB
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Northern Pacific 3
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Derails in Passing Sidings
1.1 MB
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Efficiency Tests
1.9 MB
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The Light-Traffic Crossing
276.3 KB
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obituary 1
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Thomas A. Edison (obituary)
1.1 MB
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Oconomowoc, WI 1
Omaha, NE 1
Pekin, IL 1
Penn, Philadelphia, PA 1
Pennsylvania 10
Peoria & Pekin Union 1
Peoria, IL 1
personal 1
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Thomas A. Edison (obituary)
1.1 MB
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Peru, IN 1
Philadelphia, PA 4
Polo, MO 1
Portage, WI 1
Portsmouth, OH 1
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Power Interlocking Eliminates Delays
488.8 KB
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position light signals 1
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Power Interlocking Eliminates Delays
488.8 KB
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Raritan, NJ 1
Reading 1
relay assembly 1
relay repair 1
relays 1
remote control 1
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What Can Be Done Now?
736.8 KB
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reserve yellow 1
Rice, IL 1
Rosas, PA 1
Ruislip, England 1
Scott Street, Toronto, Ontario 1
Secaucus, NJ 1
signal repair shop 1
smashboards 1
South Branch Bridge 1
Southern 1
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Derails in Passing Sidings
1.1 MB
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Southern Pacific 2
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Protecting CTC Switches
2.9 MB
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Speed Control of Crossing Signals
586.7 KB
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Sprague Safety Control & Signal 1
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GN Asks to Remove Train Control
215.6 KB
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Springfield, IL 1
St. Charles Air Line 1
St. Louis, MO 3
St. Louis-San Francisco 1
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Efficiency Tests
1.9 MB
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Stanley, OH 1
State Line, IN 1
table-lever interlocking 1
Terminal Railroad Association of St. Louis 2
Toronto Terminals 1
Toronto, Ontario 1
Tower A, Omaha, NE 1
Tower B, Omaha, NE 1
Tower C, Omaha, NE 1
Tower NY, IL 1
track circuits 1
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The AC DC Track Circuit
1.5 MB
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train control 2
Trenton, NJ 1
Trois Rivieres, Quebec 1
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Economy of Smaller Towers
539.7 KB
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Type E signals 1
Union Pacific 2
Union Switch & Signal 4
Uxbridge, England 1
Valley Park, MO 1
Wabash 4
Wayne Jct., PA 1
West Nelson, IL 1
West Trenton, NJ 1
Western Pacific 1
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Efficiency Tests
1.9 MB
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wigwag signals 1
Williston, ND 1
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GN Asks to Remove Train Control
215.6 KB
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