Railway Signaling: 1929

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.

Learn more about this collection.

16th Street (NYC), Chicago, IL 1

1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB

1929 1

1929	1929 index 7.4 MB

21st Street, Chicago, IL 1

1929	C&EI Derailment and Collision at Chicago 755.9 KB

Abbott, IL 1

1929	Spring Switches on Illinois Central 415.8 KB

accident 1

1929	C&EI Derailment and Collision at Chicago 755.9 KB

Arenzville, IL 1

1929	Centralized Control Used for Ends of Double Track 2.1 MB

Atchison, Topeka & Santa Fe 3

1929	Adjustment of Clockwork Time Releases 1.4 MB
1929	Detector Locking Should Not Have an Emergency Release 1.3 MB
1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB

Atlantic Coast Line 2

1929	Mechanical Selector for Interlocker 361.4 KB
1929	Rear-End Flagging 745.4 KB

Aurora, IL 1

1929	Maintenance Tests at Burlington Interlocker 1.2 MB

Baltimore & Ohio 3

1929	Detector Locking Should Not Have an Emergency Release 1.3 MB
1929	Report on B&O Head-End Collision at East St. Louis 1.1 MB
1929	Trains on Baltimore & Ohio Operate by Signal Indication Over Single-Track Lines 2.7 MB

Belt Line Jct., Detroit, MI 1

1929	Simplified Electric Interlocking Plant on Michigan Central.pdf 3.6 MB

Boston & Maine 1

1929	B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB

Boston, MA 1

1929	B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB

Bristol, IL 1

1929	Spring Switches on Illinois Central 415.8 KB

Bristow, OK 1

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB

centralized traffic control 1

1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB

Chesapeake & Ohio 3

1929	Adjustment of Clockwork Time Releases 1.4 MB
1929	What Kind of Control for Take-Siding Signals? 512.5 KB
1929	Where Should Grade Signals Be Installed? 1.2 MB

Chicago & Alton 3

1929	Automatic Interlocker Saves Over 8,000 Train Stops Annually 1.7 MB
1929	C. & A. Modernizes Signaling Facilities 2.2 MB
1929	The Chicago & Alton Installs Mechanical Plant 1.3 MB

Chicago & Eastern Illinois 1

1929	C&EI Derailment and Collision at Chicago 755.9 KB

Chicago & North Western 5

1929	Adjustment of Clockwork Time Releases 1.4 MB
1929	C&NW Employs Centralized Control To Speed Up Trains 3.0 MB
1929	Further Comments on Detector Locking Releases 511.5 KB
1929	Report on C&NW Side Collision at Chicago 569.4 KB
1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB

Chicago South Shore & South Bend 3

1929	Automatic Gauntlet Signals Installed on the South Shore 1.9 MB
1929	Marker Lights on Automatic Signals 994.2 KB
1929	Trap Circuit for Drawbridge 980.8 KB

Chicago, Burlington & Quincy 4

1929	Centralized Control Used for Ends of Double Track 2.1 MB
1929	Interlocking Controlled Remotely 2.7 MB
1929	Maintenance Tests at Burlington Interlocker 1.2 MB
1929	Signaling Problems of the Future 1.5 MB

Chicago, IL 3

1929	C&EI Derailment and Collision at Chicago 755.9 KB
1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB
1929	Report on C&NW Side Collision at Chicago 569.4 KB

Chicago, Indianapolis & Louisville 1

1929	Monon Revamps Signals to Co-Ordinate with Automatic Train Stop 2.1 MB

Chicago, Milwaukee, St. Paul & Pacific 2

1929	Crossing Protection Installed Extensively on the Milwaukee 1.3 MB
1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB

Chicago, Rock Island & Pacific 4

1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB
1929	Rock Island Uses Novel System for Operation by Signal Indication 1.7 MB
1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB
1929	Signal Aspects at End of Double Track 514.3 KB

Cleveland Union Terminal 1

1929	Elimination of Lock Rods 947.9 KB

Cleveland, Cincinnati, Chicago & St. Louis 3

1929	Big Four Improves Operation by Remote Control 2.5 MB
1929	Electric Approach and Stick Locking Features 866.2 KB
1929	Manual Block Signals Controlled Remotely on the Big Four 1.1 MB

Concord, IL 1

1929	Centralized Control Used for Ends of Double Track 2.1 MB

Dayton, OH 1

1929	Pennsylvania Installs APB Signaling on 86 Miles 3.7 MB

Deen, CO 1

1929	D&RGW Expedites Trains With Centralized Control 2.1 MB

Delavan, IL 1

1929	The Chicago & Alton Installs Mechanical Plant 1.3 MB

Denver & Rio Grande Western 3

1929	D&RGW Expedites Trains With Centralized Control 2.1 MB
1929	Signal Aspects at End of Double Track 514.3 KB
1929	Where Should Grade Signals Be Installed? 1.2 MB

derails 1

1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB

desk lever interlocking 1

1929	Simplified Electric Interlocking Plant on Michigan Central.pdf 3.6 MB

Detroit, MI 1

1929	Simplified Electric Interlocking Plant on Michigan Central.pdf 3.6 MB

Deutsche Reichsbahn 1

1929	Optical Features of German Train Control Reflect Ingenuity 3.6 MB

drawbridge 1

1929	Trap Circuit for Drawbridge 980.8 KB

Duck Creek, WI 1

1929	C&NW Employs Centralized Control To Speed Up Trains 3.0 MB

East St. Louis, IL 1

1929	Report on B&O Head-End Collision at East St. Louis 1.1 MB

electric interlocking 1

1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB

Erie 1

1929	Erie Equips Complete Division with Signals and Interlockers 3.9 MB

Foster, OH 1

1929	Pennsylvania Installs APB Signaling on 86 Miles 3.7 MB

Gary, IN 1

1929	Automatic Gauntlet Signals Installed on the South Shore 1.9 MB

General Railway Signal 1

1929	An Electric Lock for Mechanical Levers 999.0 KB

Gibbs, IL 1

1929	Centralized Control Used for Ends of Double Track 2.1 MB

Grafton, WV 1

1929	Trains on Baltimore & Ohio Operate by Signal Indication Over Single-Track Lines 2.7 MB

Grand Trunk Western 1

1929	Simplified Electric Interlocking Plant on Michigan Central.pdf 3.6 MB

Green Bay, WI 1

1929	C&NW Employs Centralized Control To Speed Up Trains 3.0 MB

Greensburg, IN 1

1929	Manual Block Signals Controlled Remotely on the Big Four 1.1 MB

Hammond, IN 1

1929	Trap Circuit for Drawbridge 980.8 KB

highway crossings 2

1929	Educate Highway Users to Observe Crossing Signals 615.5 KB
1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB

Hoosac Tunnel, MA 1

1929	B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB

Horace, IN 1

1929	Manual Block Signals Controlled Remotely on the Big Four 1.1 MB

Hot Springs, AR 1

1929	Rock Island Uses Novel System for Operation by Signal Indication 1.7 MB

Hoxie, AR 1

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB

Illinois Central 1

1929	Report on IC Derailment at Interlocking Plant 647.6 KB

index 1

1929	1929 index 7.4 MB

indication locking 1

1929	Simplification of Apparatus Will Expand Usefulness of Signaling 1.3 MB

Institution of Railway Signal Engineers 1

1929	Institution of Signal Engineers Meets in Holland 1.5 MB

interlocking 5

1929	C&EI Derailment and Collision at Chicago 755.9 KB
1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB
1929	Simplification of Apparatus Will Expand Usefulness of Signaling 1.3 MB
1929	Simplification of Interlocking Permits Economical Installations 967.9 KB
1929	Simplified Electric Interlocking Plant on Michigan Central.pdf 3.6 MB

Lancaster, PA 1

1929	Pennsylvania Installs Interlocking at Lancaster, PA 3.6 MB

Lincoln, NE 1

1929	Interlocking Controlled Remotely 2.7 MB

Louisville & Nashville 1

1929	Rear-End Flagging 745.4 KB

Louisville, KY 1

1929	Manual Block Signals Controlled Remotely on the Big Four 1.1 MB

Manufacturers Railway 2

1929	Automatic Crossing Signals Used in Congested District 1.6 MB
1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB

Mattoon, IL 1

1929	Big Four Improves Operation by Remote Control 2.5 MB

Mazonia, IL 1

1929	C. & A. Modernizes Signaling Facilities 2.2 MB

Meadville, PA 1

1929	Erie Equips Complete Division with Signals and Interlockers 3.9 MB

Michigan Central 2

1929	Simplified Electric Interlocking Plant on Michigan Central.pdf 3.6 MB
1929	What Kind of Control for Take-Siding Signals? 512.5 KB

Minneapolis, MN 1

1929	Crossing Protection Installed Extensively on the Milwaukee 1.3 MB

Minturn, CO 1

1929	D&RGW Expedites Trains With Centralized Control 2.1 MB

Missouri Pacific 1

1929	Batting Averages for Signal Maintainers on MP 477.0 KB

Model 2 electric interlocking 1

1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB

Nashville, Chattanooga & St. Louis 2

1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB
1929	Where Should Grade Signals Be Installed? 1.2 MB

Netherlands 1

1929	Institution of Signal Engineers Meets in Holland 1.5 MB

New Paris, OH 1

1929	Pennsylvania Installs APB Signaling on 86 Miles 3.7 MB

New York Central 6

1929	Are Automatic Signals on Sidings Justified? 1.6 MB
1929	Automatic Interlocker Saves Over 8,000 Train Stops Annually 1.7 MB
1929	Detector Locking Should Not Have an Emergency Release 1.3 MB
1929	Marker Lights on Automatic Signals 994.2 KB
1929	NYC Expands Electric Plant By Adding 48 Levers 2.7 MB
1929	Signal Aspects at End of Double Track 514.3 KB

New York, Chicago & St. Louis 2

1929	Mechanical Locking Suggestion 369.2 KB
1929	Where Should Grade Signals Be Installed? 1.2 MB

Northern Pacific 3

1929	Mathematics of the A.C. Track Circuit 974.9 KB
1929	Rear-End Flagging 745.4 KB
1929	Where Should Grade Signals Be Installed? 1.2 MB

Pana, IL 1

1929	Big Four Improves Operation by Remote Control 2.5 MB

Parkersburg, WV 1

1929	Trains on Baltimore & Ohio Operate by Signal Indication Over Single-Track Lines 2.7 MB

Pennsylvania 8

1929	Adjustment of Clockwork Time Releases 1.4 MB
1929	Are Automatic Signals on Sidings Justified? 1.6 MB
1929	C&EI Derailment and Collision at Chicago 755.9 KB
1929	Control Schemes for Take-Siding Indicators 360.3 KB
1929	Pennsylvania Installs APB Signaling on 86 Miles 3.7 MB
1929	Pennsylvania Installs Interlocking at Lancaster, PA 3.6 MB
1929	What Kind of Control for Take-Siding Signals? 512.5 KB
1929	Where Should Grade Signals Be Installed? 1.2 MB

Pere Marquette 1

1929	Are Automatic Signals on Sidings Justified? 1.6 MB

Rockford, IL 1

1929	Crossing Protection Installed Extensively on the Milwaukee 1.3 MB

Salamanca, NY 1

1929	Erie Equips Complete Division with Signals and Interlockers 3.9 MB

Sapulpa, OK 1

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB

Seaboard Air Line 2

1929	Marker Lights on Automatic Signals 994.2 KB
1929	Rear-End Flagging 745.4 KB

signal glass 1

1929	Factors to be Considered in Selecting Glass for Signal Lenses 4.2 MB

South Joliet, IL 1

1929	C. & A. Modernizes Signaling Facilities 2.2 MB

spring switches 1

1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB

St. Louis, MO 1

1929	Automatic Crossing Signals Used in Congested District 1.6 MB

St. Louis-San Francisco 2

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB
1929	What Type of Release at Automatic Interlockers? 1.0 MB

Streator, IL 1

1929	Automatic Interlocker Saves Over 8,000 Train Stops Annually 1.7 MB

Tennessee Pass 1

1929	D&RGW Expedites Trains With Centralized Control 2.1 MB

Terre Haute, IN 1

1929	Big Four Improves Operation by Remote Control 2.5 MB

Thayer, MO 1

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB

track circuits 1

1929	Scientific Research on Track Circuits 844.6 KB

train control 3

1929	Simplification of Apparatus Will Expand Usefulness of Signaling 1.3 MB
1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB
1929	What Is the Future of Train Control? 1.8 MB

Troy, NY 1

1929	B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB

Tulsa, OK 1

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB

Union Switch & Signal 5

1929	"Union" Clock-Work Time Release 611.8 KB
1929	"Union" Thermal Relay 1.0 MB
1929	A Time-Element Relay 572.7 KB
1929	US&S float 512.3 KB
1929	What Is the Future of Train Control? 1.8 MB

Wabash 2

1929	Flashing-Light Crossing Signals Save Money for Wabash 1.9 MB
1929	Secure New Ordinances for Changes in Crossing Protection 691.4 KB

Wabash, IN 1

1929	Flashing-Light Crossing Signals Save Money for Wabash 1.9 MB

Wolf Creek, OH 1

1929	Pennsylvania Installs APB Signaling on 86 Miles 3.7 MB

Xenia, OH 1

1929	Pennsylvania Installs APB Signaling on 86 Miles 3.7 MB

Railway Signaling: 1929

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