Railway Signaling: 1935

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.

"TRAIN" indicators 1

1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB

1935 1

1935	1935 index 4.5 MB

accident 8

1935	Accident at Automatic Plant 4.5 MB
1935	Accident at Drawbridge 1.4 MB
1935	Call-on Signal Involved In Accident 1.1 MB
1935	Collision on the Erie 2.2 MB
1935	Collision on the T&P 2.0 MB
1935	Improving Automatic Interlockings 3.5 MB
1935	Letter to the Editor: Use of Cab Signals 1.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB

accidents 2

1935	Bells as Accessory Highway Crossing Protection 3.5 MB
1935	Letter to the Editor: Highways vs. Railroads 1.7 MB

aerial cable 1

1935	Aerial Cable Versus Open Line 3.9 MB

all-relay interlocking 2

1935	Mechanical Plant Replaced by Electric Interlocking 7.2 MB
1935	Western Indiana Installs All-Relay Interlocking 11.4 MB

alternating current track circuits 1

1935	New Interlocking in the Chicago Loop 4.0 MB

Alton 2

1935	Semi-Automatic Interlocking at a Crossing on the Alton 4.4 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

approach lighting 1

1935	Checking Signal Lamps 3.3 MB

aspects and indications 1

1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

Atchison, Topeka & Santa Fe 6

1935	Automatic Interlocking Involves Highway Crossing Signals 3.4 MB
1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB
1935	Pole Lines for Automatic Signaling 1.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling in Dust Storms 2.3 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Atlantic Coast Line 6

1935	Checking Rail Ends on Drawbridges 2.5 MB
1935	False Operation of Crossing Signals 955.2 KB
1935	False Operation of Crossing Signals 3.3 MB
1935	Installation of Bond Wires 4.0 MB
1935	Maintainers' Tool Houses 3.5 MB
1935	Standardization of Circuit Plans for Highway Crossing Signals 4.5 MB

Aurora, IL 2

1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB

auto-stop barriers 1

1935	Auto Stop Installed on C&NW 7.2 MB

automatic block signaling 8

1935	Aerial Cable Versus Open Line 3.9 MB
1935	Call-on Signal Involved In Accident 1.1 MB
1935	Coded Track Circuit Signaling on the Pennsylvania 9.8 MB
1935	Multiple-Block Signaling 7.0 MB
1935	New Automatic Signals Increase Track Capacity and Safety on the Erie 6.4 MB
1935	New Signaling on the Boston & Maine 9.9 MB
1935	Pole Lines for Automatic Signaling 1.6 MB
1935	Respacing Automatics on the Pennsylvania 1.8 MB

automatic interlocking 7

1935	Accident at Automatic Plant 4.5 MB
1935	Automatic Interlocking on the Brooklyn-Manhattan Transit 5.4 MB
1935	Automatic Interlocking on the Philadelphia Elevated 6.1 MB
1935	Automatic Interlocking on the Wabash 2.9 MB
1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB
1935	Great Western Constructs Automatic Interlocking 6.8 MB
1935	Improving Automatic Interlockings 3.5 MB

automatic train control 1

1935	Cab Signals and ATC on UP Streamliner 2.1 MB

Bagley, F. H 1

1935	Night Check of Signal Lights 1.2 MB

Baltimore & Ohio 5

1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB
1935	Disposition of Mechanical Interlocking Equipment 1.3 MB
1935	Nickel Plating of Signal Apparatus 1.1 MB
1935	Removal of Switch Indicators 2.3 MB
1935	Safety of High Speed Trains 5.2 MB

Bangor, ME 1

1935	Safety of High Speed Trains 5.2 MB

battery charger 1

1935	New Devices 1.5 MB

Beaumont, TX 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

bonding 2

1935	Installation of Bond Wires 1.2 MB
1935	Installation of Bond Wires 4.0 MB

Boston & Albany 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Boston & Maine 9

1935	Braking Distance with Signals 2.4 MB
1935	Inspecting Switch Circuit Controllers 1.7 MB
1935	Modern Signal Aspects on the Boston & Maine 5.1 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	New Signaling on the Boston & Maine 9.9 MB
1935	Obsolescence in Signaling 3.4 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Safety of High Speed Trains 5.2 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

Boston, MA 2

1935	Safety of High Speed Trains 5.2 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

braking distance 8

1935	A Problem in Spacing Signals for Higher Train Speeds 1.6 MB
1935	Braking Distance with Signals 2.4 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	Multiple-Block Signaling 7.0 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	Stopping Distance and Signal Spacing 1.8 MB

Brooklyn, NY 1

1935	Automatic Interlocking on the Brooklyn-Manhattan Transit 5.4 MB

Brooklyn-Manhattan Transit 1

1935	Automatic Interlocking on the Brooklyn-Manhattan Transit 5.4 MB

Bureau of Public Roads 2

1935	Highway Crossing Protection With Federal Funds 2.9 MB
1935	The Federal Crossing Protection Program 1.6 MB

cab signaling 2

1935	Letter to the Editor: Use of Cab Signals 1.2 MB
1935	Obsolescence in Signaling 3.4 MB

cab signals 2

1935	Cab Signals and ATC on UP Streamliner 2.1 MB
1935	Pole Lines for Automatic Signaling 1.6 MB

Canadian National 2

1935	Installation of Bond Wires 4.0 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB

Canadian Pacific 4

1935	False Operation of Crossing Signals 3.3 MB
1935	Mechanical Plant Replaced by Electric Interlocking 7.2 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Trap Circuits at Railroad Crossings 4.6 MB

capacity 1

1935	Multiple-Block Signaling 7.0 MB

centralized traffic control 6

1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB
1935	Centralized Traffic Control on the Chesapeake & Ohio 6.2 MB
1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB
1935	New Signaling on the Boston & Maine 9.9 MB
1935	Obsolescence in Signaling 3.4 MB
1935	Power-Off Lights at CTC Machines 2.1 MB

Chesapeake & Ohio 4

1935	Aerial Cable Versus Open Line 3.9 MB
1935	Centralized Traffic Control on the Chesapeake & Ohio 6.2 MB
1935	FPL Adjustment on Spring Switches 1.3 MB
1935	Signaling at Spring Switches 2.6 MB

Cheyenne, WY 1

1935	Safety of High Speed Trains 5.2 MB

Chicago & North Western 13

1935	Auto Stop Installed on C&NW 7.2 MB
1935	Avoiding Light-Out Signal Failures 2.2 MB
1935	Crossing Signals on the C&NW at Oshkosh, Wis 3.4 MB
1935	Inspecting Switch Circuit Controllers 1.7 MB
1935	Installation of Bond Wires 1.2 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	Stopping Distance and Signal Spacing 1.8 MB
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB
1935	The Railways' Answer to the Demand for Speed 2.8 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB
1935	Use of Marker Lamps 1.0 MB

Chicago & Western Indiana 1

1935	Western Indiana Installs All-Relay Interlocking 11.4 MB

Chicago Great Western 2

1935	Great Western Constructs Automatic Interlocking 6.8 MB
1935	Signaling at Spring Switches 2.6 MB

Chicago Rapid Transit 2

1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB
1935	New Interlocking in the Chicago Loop 4.0 MB

Chicago, Burlington & Quincy 8

1935	Aerial Cable Versus Open Line 3.9 MB
1935	Inspecting Switch Circuit Controllers 1.7 MB
1935	Installation of Bond Wires 4.0 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Purple Signal Glasses 3.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

Chicago, IL 7

1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB
1935	New Interlocking in the Chicago Loop 4.0 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB
1935	Western Indiana Installs All-Relay Interlocking 11.4 MB

Chicago, Indianapolis & Louisville 1

1935	Removal of Switch Indicators 2.3 MB

Chicago, Milwaukee, St. Paul & Pacific 6

1935	Automatic Interlocking on the Wabash 2.9 MB
1935	Great Western Constructs Automatic Interlocking 6.8 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

Chicago, Rock Island & Pacific 4

1935	Accident at Automatic Plant 4.5 MB
1935	Automatic OSing Devices Usde by the Rock Island 2.2 MB
1935	Crossing Bells at Flasher Signals 1.9 MB
1935	Western Indiana Installs All-Relay Interlocking 11.4 MB

circuit plans 1

1935	Standardization of Circuit Plans for Highway Crossing Signals 4.5 MB

circuits 4

1935	Auto Stop Installed on C&NW 7.2 MB
1935	Circuit for Flashing Light Signals 3.5 MB
1935	Circuit for Flashing Light Signals 3.6 MB
1935	Circuits for Crossing Signals 1.5 MB

Cleveland, OH 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Clifton Forge, VA 1

1935	Centralized Traffic Control on the Chesapeake & Ohio 6.2 MB

code line 1

1935	Aerial Cable Versus Open Line 3.9 MB

coded track circuits 3

1935	Coded Track Circuit Control 1.5 MB
1935	Coded Track Circuit Signaling on the Pennsylvania 9.8 MB
1935	Pole Lines for Automatic Signaling 1.6 MB

color light signals 6

1935	Avoiding Light-Out Signal Failures 2.2 MB
1935	Avoiding Light-Out Signal Failures 1.2 MB
1935	Mechanical Color Light Signals in England 1.3 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Night Check of Signal Lights 1.2 MB
1935	Night Intensity of Signal Lamps 2.6 MB

color position light signals 1

1935	Multiple Aspect Signaling 3.3 MB

color specifications 2

1935	Purple Signal Glasses 3.6 MB
1935	Purple Signal Glasses 3.3 MB

Colorado & Southern 1

1935	Installation of Bond Wires 4.0 MB

communication circuits 1

1935	Pole Lines for Automatic Signaling 1.6 MB

Covington, VA 1

1935	Centralized Traffic Control on the Chesapeake & Ohio 6.2 MB

Crestline, OH 1

1935	Respacing Automatics on the Pennsylvania 1.8 MB

crossing barriers 1

1935	Auto Stop Installed on C&NW 7.2 MB

crossing bells 1

1935	Crossing Bells at Flasher Signals 1.9 MB

crossing flashers 3

1935	Alining Flashers 3.2 MB
1935	Circuit for Flashing Light Signals 3.5 MB
1935	Circuit for Flashing Light Signals 3.6 MB

Dallas, TX 2

1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB
1935	Collision on the T&P 2.0 MB

Dayton, TX 1

1935	Switch-Stand Selector 1.9 MB

DC track circuits 1

1935	DC Track Circuits 963.2 KB

De Kalb, IL 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Delaware, Lackawanna & Western 2

1935	Call-on Signal Involved In Accident 1.1 MB
1935	Multiple Aspect Signaling 3.3 MB

Delson, Quebec 1

1935	Mechanical Plant Replaced by Electric Interlocking 7.2 MB

Denver, CO 1

1935	Safety of High Speed Trains 5.2 MB

Des Moines, IA 1

1935	Auto Stop Installed on C&NW 7.2 MB

detector bars 1

1935	New Interlocking in the Chicago Loop 4.0 MB

disc signals 1

1935	Obsolescence in Signaling 3.4 MB

DNL-41 relay 1

1935	An Under-Voltage Relay 1.2 MB

drawbridge 1

1935	Accident at Drawbridge 1.4 MB

dust storms 1

1935	Signaling in Dust Storms 2.3 MB

East Springfield, IL 1

1935	Semi-Automatic Interlocking at a Crossing on the Alton 4.4 MB

Eck, W. J. 1

1935	Crossing Bells at Flasher Signals 1.9 MB

El Paso, TX 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

electric interlocking 1

1935	New York Central Extends South Bend Interlocking 6.0 MB

electric lock switches 1

1935	Depression Operation of Interlocking 2.6 MB

electro-pneumatic interlocking 2

1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB
1935	New Interlocking in the Chicago Loop 4.0 MB

Elgin, Joliet & Eastern 1

1935	Purple Signal Glasses 3.3 MB

Emergency Relief Appropriation Act 2

1935	Highway Crossing Protection With Federal Funds 2.9 MB
1935	The Federal Crossing Protection Program 1.6 MB

Erie 3

1935	Collision on the Erie 2.2 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	New Automatic Signals Increase Track Capacity and Safety on the Erie 6.4 MB

facing point locks 2

1935	Facing Point Locks on Switches 3.2 MB
1935	FPL Adjustment on Spring Switches 1.3 MB

federal highway improvement program 1

1935	Highway-Railroad Crossing Signals Installed at Federal Expense 1.2 MB

flashing aspects 2

1935	Flashing Aspects 1.3 MB
1935	Multiple Aspect Signaling 3.3 MB

flashing light signals 2

1935	Crossing Bells at Flasher Signals 1.9 MB
1935	Letter to the Editor: Highways vs. Railroads 1.7 MB

Florida East Coast 2

1935	Accident at Drawbridge 1.4 MB
1935	Signaling for Higher Train Speeds 3.0 MB

Folsom Place, WI 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Ft. Wayne, IN 2

1935	Respacing Automatics on the Pennsylvania 1.8 MB
1935	Signaling for Higher Train Speeds 3.0 MB

Ft. Worth, TX 1

1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB

fundamental practices 1

1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

Gault, P. M. 1

1935	Crossing Bells at Flasher Signals 1.9 MB

General Electric 2

1935	Signal Night for New York Railroad Club 1.1 MB
1935	Signal Transformers 2.2 MB

General Railway Signal 9

1935	Advantages of Modern Relays 4.0 MB
1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB
1935	Crossing Signals on the Southern 1.4 MB
1935	Ground Detector Relay for Instantaneous and Automatic Detection 2.3 MB
1935	New Signaling on the Boston & Maine 9.9 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	New York Central Extends South Bend Interlocking 6.0 MB
1935	Power Transfer Relay 1.3 MB
1935	Snubbing Rectifier for 2A Signal 1.9 MB

Grand Central Terminal, New York, NY 1

1935	Multiple-Block Signaling 7.0 MB

Grand Prairie, TX 1

1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB

Grand Trunk Western 1

1935	New York Central Extends South Bend Interlocking 6.0 MB

Great Northern 4

1935	Checking Signal Lamps 3.3 MB
1935	FPL Adjustment on Spring Switches 1.3 MB
1935	Letter to the Editor- Crossing Protection Situation 2.7 MB
1935	Signaling at Spring Switches 2.6 MB

ground detector relay 1

1935	Ground Detector Relay for Instantaneous and Automatic Detection 2.3 MB

Gulf, Mobile & Northern 1

1935	Safety of High Speed Trains 5.2 MB

Hall disc signals 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Harrison, NJ 1

1935	Call-on Signal Involved In Accident 1.1 MB

high-speed trains 8

1935	A Problem in Spacing Signals for Higher Train Speeds 1.6 MB
1935	An Improved Track Circuit for Light-Weight Equipment 2.4 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	Stopping Distance and Signal Spacing 1.8 MB
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB

Highland Park, IL 2

1935	Signaling for Higher Train Speeds 3.0 MB
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB

highway crossings 23

1935	Alining Flashers 3.2 MB
1935	Auto Stop Installed on C&NW 7.2 MB
1935	Automatic Interlocking Involves Highway Crossing Signals 3.4 MB
1935	Bells as Accessory Highway Crossing Protection 3.5 MB
1935	Circuit for Flashing Light Signals 3.5 MB
1935	Circuit for Flashing Light Signals 3.6 MB
1935	Circuits for Crossing Signals 1.5 MB
1935	Crossing Bells at Flasher Signals 1.9 MB
1935	Crossing Signals on the C&NW at Oshkosh, Wis 3.4 MB
1935	Crossing Signals on the Southern 1.4 MB
1935	False Operation of Crossing Signals 955.2 KB
1935	False Operation of Crossing Signals 3.3 MB
1935	Highway Crossing Protection With Federal Funds 2.9 MB
1935	Highway-Railroad Crossing Signals Installed at Federal Expense 1.2 MB
1935	Improving Crossing Protection 1.2 MB
1935	Letter to the Editor- Crossing Protection Situation 2.7 MB
1935	Letter to the Editor: Highways vs. Railroads 1.7 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Standardization of Circuit Plans for Highway Crossing Signals 4.5 MB
1935	Test Equipment for Highway Crossing Signals 1.1 MB
1935	The Federal Crossing Protection Program 1.6 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB
1935	Wig Wags Approved for PWA Projects 1.4 MB

highway safety 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Hobart, IN 2

1935	Respacing Automatics on the Pennsylvania 1.8 MB
1935	Signaling for Higher Train Speeds 3.0 MB

Howson, E. T. 1

1935	Safety of High Speed Trains 5.2 MB

Illinois Central 1

1935	Night Check of Signal Lights 1.2 MB

index 1

1935	1935 index 4.5 MB

Indian Hill, IL 1

1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB

indication locking 1

1935	Repeating Reverse Signal Indication 2.9 MB

inspections 1

1935	X-Rays in the Signal Industry 5.8 MB

interlocking 21

1935	Accident at Automatic Plant 4.5 MB
1935	Automatic Interlocking Involves Highway Crossing Signals 3.4 MB
1935	Automatic Interlocking on the Brooklyn-Manhattan Transit 5.4 MB
1935	Automatic Interlocking on the Philadelphia Elevated 6.1 MB
1935	Automatic Interlocking on the Wabash 2.9 MB
1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB
1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB
1935	Checking Rail Ends on Drawbridges 2.5 MB
1935	Depression Operation of Interlocking 2.6 MB
1935	Electric Interlocking in Snow Sheds on the Southern Pacific 8.2 MB
1935	Great Western Constructs Automatic Interlocking 6.8 MB
1935	Improving Automatic Interlockings 3.5 MB
1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB
1935	Mechanical Plant Replaced by Electric Interlocking 7.2 MB
1935	New Interlocking in the Chicago Loop 4.0 MB
1935	New York Central Extends South Bend Interlocking 6.0 MB
1935	Repeating Reverse Signal Indication 2.9 MB
1935	Semi-Automatic Interlocking at a Crossing on the Alton 4.4 MB
1935	Trap Circuits at Railroad Crossings 4.6 MB
1935	Use of Marker Lamps 1.0 MB
1935	Western Indiana Installs All-Relay Interlocking 11.4 MB

interlocking consolidation 1

1935	Obsolescence in Signaling 3.4 MB

Interstate Commerce Commission 4

1935	Accident at Automatic Plant 4.5 MB
1935	Call-on Signal Involved In Accident 1.1 MB
1935	Collision on the T&P 2.0 MB
1935	Letter to the Editor: Highways vs. Railroads 1.7 MB

Iowa Board of Railroad Commissioners 1

1935	Accident at Automatic Plant 4.5 MB

Jupiter, FL 1

1935	Accident at Drawbridge 1.4 MB

Kansas City Southern 1

1935	Installation of Bond Wires 4.0 MB

Kansas City, MO 1

1935	Safety of High Speed Trains 5.2 MB

Lagny, France 1

1935	Letter to the Editor: Use of Cab Signals 1.2 MB

Lake, WI 1

1935	Safety of High Speed Trains 5.2 MB

Lakewood, OH 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

light-out circuits 2

1935	Avoiding Light-Out Signal Failures 2.2 MB
1935	Avoiding Light-Out Signal Failures 1.2 MB

lightweight trains 1

1935	An Improved Track Circuit for Light-Weight Equipment 2.4 MB

Lincoln, NE 1

1935	Safety of High Speed Trains 5.2 MB

line circuits 2

1935	Aerial Cable Versus Open Line 3.9 MB
1935	Pole Lines for Automatic Signaling 1.6 MB

London & North Eastern 1

1935	Mechanical Color Light Signals in England 1.3 MB

Los Angeles, CA 2

1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB
1935	Safety of High Speed Trains 5.2 MB

Louisville & Nashville 4

1935	Checking Rail Ends on Drawbridges 2.5 MB
1935	Removal of Switch Indicators 2.3 MB
1935	Signaling at Spring Switches 2.6 MB
1935	Trap Circuits at Railroad Crossings 4.6 MB

lower quadrant semaphores 1

1935	Obsolescence in Signaling 3.4 MB

lunar white 2

1935	Letter to the Editor- Comment on Multiple Aspects 1.5 MB
1935	Multiple Aspect Signaling 3.3 MB

Maine Central 2

1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

maintainers' quarters 2

1935	Maintainers' Tool Houses 3.5 MB
1935	Maintainers' Tool Houses 1.1 MB

marker lamps 1

1935	Use of Marker Lamps 1.0 MB

Martinez, CA 1

1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB

Mayfair, IL 2

1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB

McKeesport, PA 1

1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB

mechanical color light signals 1

1935	Mechanical Color Light Signals in England 1.3 MB

mechanical interlocking 3

1935	Depression Operation of Interlocking 2.6 MB
1935	Disposition of Mechanical Interlocking Equipment 1.3 MB
1935	Mechanical Plant Replaced by Electric Interlocking 7.2 MB

mechanical signals 1

1935	Mechanical Color Light Signals in England 1.3 MB

Michigan Central 1

1935	New York Central Extends South Bend Interlocking 6.0 MB

Milwaukee, WI 4

1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB

Miner, WI 2

1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB

Minneapolis & St. Louis 1

1935	Accident at Automatic Plant 4.5 MB

Minneapolis, MN 2

1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB

Missouri Pacific 5

1935	Crossing Bells at Flasher Signals 1.9 MB
1935	Disposition of Mechanical Interlocking Equipment 1.3 MB
1935	Facing Point Locks on Switches 3.2 MB
1935	Flashing Aspects 1.3 MB
1935	Signaling in Dust Storms 2.3 MB

Missouri-Kansas-Texas 3

1935	Avoiding Light-Out Signal Failures 1.2 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Signaling in Dust Storms 2.3 MB

Model 2A semaphore 1

1935	Snubbing Rectifier for 2A Signal 1.9 MB

Model 5 electric interlocking 1

1935	New York Central Extends South Bend Interlocking 6.0 MB

Modena, PA 1

1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB

Moravia, IA 1

1935	Automatic Interlocking on the Wabash 2.9 MB

Morgan, H. G. 1

1935	Night Check of Signal Lights 1.2 MB

Morning Sun, IA 2

1935	Accident at Automatic Plant 4.5 MB
1935	Improving Automatic Interlockings 3.5 MB

Mott Haven, NY 1

1935	Multiple-Block Signaling 7.0 MB

movable bridges 2

1935	Checking Rail Ends on Drawbridges 2.5 MB
1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB

MQ Crossing, NY 1

1935	Collision on the Erie 2.2 MB

multiple-aspect signaling 3

1935	Letter to the Editor- Comment on Multiple Aspects 1.5 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	Multiple-Block Signaling 7.0 MB

Myrtle Avenue Line, Brooklyn, NY 1

1935	Automatic Interlocking on the Brooklyn-Manhattan Transit 5.4 MB

Nadeau, CA 1

1935	Automatic Interlocking Involves Highway Crossing Signals 3.4 MB

New Castle Jct., PA 1

1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB

New York Central 12

1935	Aerial Cable Versus Open Line 3.9 MB
1935	Avoiding Light-Out Signal Failures 1.2 MB
1935	DC Track Circuits 963.2 KB
1935	Disposition of Mechanical Interlocking Equipment 1.3 MB
1935	Facing Point Locks on Switches 3.2 MB
1935	Installation of Bond Wires 4.0 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	Multiple-Block Signaling 7.0 MB
1935	New York Central Extends South Bend Interlocking 6.0 MB
1935	Purple Signal Glasses 3.3 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signal Night for New York Railroad Club 1.1 MB

New York subway 1

1935	Signal Night for New York Railroad Club 1.1 MB

New York, Chicago & St. Louis 3

1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Signaling at Spring Switches 2.6 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

New York, New Haven & Hartford 4

1935	"Chattering" Slot Arms 2.3 MB
1935	Checking Rail Ends on Drawbridges 2.5 MB
1935	Multiple-Block Signaling 7.0 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

New York, NY 4

1935	Automatic Interlocking on the Brooklyn-Manhattan Transit 5.4 MB
1935	Multiple-Block Signaling 7.0 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB

nickel plating 1

1935	Nickel Plating of Signal Apparatus 1.1 MB

Noble, S. E. 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Norden, CA 1

1935	Electric Interlocking in Snow Sheds on the Southern Pacific 8.2 MB

Northern Pacific 3

1935	Checking Signal Lamps 3.3 MB
1935	False Operation of Crossing Signals 3.3 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB

Oakdale, IL 1

1935	Western Indiana Installs All-Relay Interlocking 11.4 MB

obsolete equipment 1

1935	Obsolescence in Signaling 3.4 MB

obsolete signal facilities 1

1935	Obsolescence in Signaling 3.4 MB

Omaha, NE 1

1935	Safety of High Speed Trains 5.2 MB

OS device 1

1935	Automatic OSing Devices Usde by the Rock Island 2.2 MB

Oshkosh, WI 1

1935	Crossing Signals on the C&NW at Oshkosh, Wis 3.4 MB

overhauling 1

1935	Obsolescence in Signaling 3.4 MB

Peerless Manufacturing 1

1935	Snubbing Relay for Semaphores 1.0 MB

Pennsylvania 13

1935	Coded Track Circuit Signaling on the Pennsylvania 9.8 MB
1935	Facing Point Locks on Switches 3.2 MB
1935	FPL Adjustment on Spring Switches 1.3 MB
1935	Installation of Bond Wires 4.0 MB
1935	Letter to the Editor- Comment on Multiple Aspects 1.5 MB
1935	Operating Long Switch Points 2.4 MB
1935	Pole Lines for Automatic Signaling 1.6 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Respacing Automatics on the Pennsylvania 1.8 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signal Night for New York Railroad Club 1.1 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

Pere Marquette 1

1935	Circuit for Flashing Light Signals 3.5 MB

Philadelphia Rapid Transit 1

1935	Automatic Interlocking on the Philadelphia Elevated 6.1 MB

Philadelphia, PA 1

1935	Automatic Interlocking on the Philadelphia Elevated 6.1 MB

Pineville, NC 1

1935	Crossing Signals on the Southern 1.4 MB

Pittsburgh & Lake Erie 1

1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB

pole lines 1

1935	Pole Lines for Automatic Signaling 1.6 MB

Portland, OR 1

1935	Safety of High Speed Trains 5.2 MB

position light signals 3

1935	Coded Track Circuit Signaling on the Pennsylvania 9.8 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	Respacing Automatics on the Pennsylvania 1.8 MB

power switches 1

1935	Remote Control on the Seaboard 5.4 MB

power transfer relays 2

1935	An Under-Voltage Relay 1.2 MB
1935	Power Transfer Relay 1.3 MB

power-off indications 1

1935	Power-Off Lights at CTC Machines 2.1 MB

primary battery cell 1

1935	New Devices 1.5 MB

Public Works Administration 2

1935	Standardization of Circuit Plans for Highway Crossing Signals 4.5 MB
1935	Wig Wags Approved for PWA Projects 1.4 MB

purple 3

1935	Multiple Aspect Signaling 3.3 MB
1935	Purple Signal Glasses 3.6 MB
1935	Purple Signal Glasses 3.3 MB

rail locks 1

1935	Checking Rail Ends on Drawbridges 2.5 MB

Railway Signal Association 1

1935	Letter to the Editor- Comment on Multiple Aspects 1.5 MB

Reading 2

1935	Alining Flashers 3.2 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB

rectifiers 1

1935	New Devices 1.5 MB

red center purple glass 1

1935	Purple Signal Glasses 3.3 MB

red center purple lenses 1

1935	Purple Signal Glasses 3.3 MB

relay 2

1935	An Under-Voltage Relay 1.2 MB
1935	Ground Detector Relay for Instantaneous and Automatic Detection 2.3 MB

relays 5

1935	Advantages of Modern Relays 4.0 MB
1935	Circuits for Crossing Signals 1.5 MB
1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB
1935	Obsolescence in Signaling 3.4 MB
1935	Power Transfer Relay 1.3 MB

remote control 3

1935	Obsolescence in Signaling 3.4 MB
1935	Power-Off Lights at CTC Machines 2.1 MB
1935	Remote Control on the Seaboard 5.4 MB

repair shop 1

1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB

reserve yellow 2

1935	Avoiding Light-Out Signal Failures 2.2 MB
1935	Avoiding Light-Out Signal Failures 1.2 MB

Rhea, Frank 1

1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

Ridgewood Jct., NJ 1

1935	New Automatic Signals Increase Track Capacity and Safety on the Erie 6.4 MB

Ridgewood, NJ 1

1935	New Automatic Signals Increase Track Capacity and Safety on the Erie 6.4 MB

Rondout, IL 1

1935	Signaling for Higher Train Speeds 3.0 MB

Rudd, A. H. 4

1935	Letter to the Editor- Comment on Multiple Aspects 1.5 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Signal Night for New York Railroad Club 1.1 MB
1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

Rudd-Rhea report 1

1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

Russell, IL 1

1935	Safety of High Speed Trains 5.2 MB

Rutherford Jct., NJ 1

1935	New Automatic Signals Increase Track Capacity and Safety on the Erie 6.4 MB

Salina, KS 1

1935	Safety of High Speed Trains 5.2 MB

San Francisco, CA 1

1935	Safety of High Speed Trains 5.2 MB

San Jose, CA 1

1935	Depression Operation of Interlocking 2.6 MB

Seaboard Air Line 4

1935	Installation of Bond Wires 4.0 MB
1935	Night Check of Signal Lights 1.2 MB
1935	Remote Control on the Seaboard 5.4 MB
1935	Removal of Switch Indicators 2.3 MB

searchlight signals 4

1935	Avoiding Light-Out Signal Failures 1.2 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Repeating Reverse Signal Indication 2.9 MB

semaphore signals 5

1935	"Chattering" Slot Arms 2.3 MB
1935	Night Check of Signal Lights 1.2 MB
1935	Repeating Reverse Signal Indication 2.9 MB
1935	Snubbing Rectifier for 2A Signal 1.9 MB
1935	Snubbing Relay for Semaphores 1.0 MB

semi-automatic interlocking 1

1935	Semi-Automatic Interlocking at a Crossing on the Alton 4.4 MB

show sheds 1

1935	Electric Interlocking in Snow Sheds on the Southern Pacific 8.2 MB

Sierra Nevada mountains 1

1935	Electric Interlocking in Snow Sheds on the Southern Pacific 8.2 MB

signal aspects 7

1935	Flashing Aspects 1.3 MB
1935	Modern Signal Aspects on the Boston & Maine 5.1 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	Multiple-Block Signaling 7.0 MB
1935	Purple Signal Glasses 3.6 MB
1935	Purple Signal Glasses 3.3 MB
1935	Use of Marker Lamps 1.0 MB

signal colors 3

1935	Multiple Aspect Signaling 3.3 MB
1935	Purple Signal Glasses 3.6 MB
1935	Purple Signal Glasses 3.3 MB

signal indications 1

1935	Collision on the T&P 2.0 MB

signal lamps 2

1935	Checking Signal Lamps 3.3 MB
1935	Night Intensity of Signal Lamps 2.6 MB

signal lighting 2

1935	Night Check of Signal Lights 1.2 MB
1935	Night Intensity of Signal Lamps 2.1 MB

signal maintainers 1

1935	Maintainers' Tool Houses 2.2 MB

signal mechanisms 1

1935	Obsolescence in Signaling 3.4 MB

signal spacing 8

1935	A Problem in Spacing Signals for Higher Train Speeds 1.6 MB
1935	Braking Distance with Signals 2.4 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Respacing Automatics on the Pennsylvania 1.8 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	Stopping Distance and Signal Spacing 1.8 MB

signal standards 1

1935	The Rudd-Rhea Signaling Report of the Pennsylvania 9.7 MB

signal transformers 1

1935	Signal Transformers 2.2 MB

signaling 2

1935	Remote Control on the Seaboard 5.4 MB
1935	Signaling at Spring Switches 2.6 MB

slot arms 1

1935	"Chattering" Slot Arms 2.3 MB

snubbing rectifier 1

1935	Snubbing Rectifier for 2A Signal 1.9 MB

snubbing relay 1

1935	Snubbing Relay for Semaphores 1.0 MB

South Acton, MA 1

1935	New Signaling on the Boston & Maine 9.9 MB

South Bend, IN 1

1935	New York Central Extends South Bend Interlocking 6.0 MB

South Street, PA 1

1935	Automatic Interlocking on the Philadelphia Elevated 6.1 MB

Southern 6

1935	Crossing Bells at Flasher Signals 1.9 MB
1935	Crossing Signals on the Southern 1.4 MB
1935	Facing Point Locks on Switches 3.2 MB
1935	Installation of Bond Wires 4.0 MB
1935	Maintainers' Tool Houses 2.2 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Southern Pacific 12

1935	Automatic Interlocking Involves Highway Crossing Signals 3.4 MB
1935	Checking Rail Ends on Drawbridges 2.5 MB
1935	Checking Signal Lamps 3.3 MB
1935	Depression Operation of Interlocking 2.6 MB
1935	Electric Interlocking in Snow Sheds on the Southern Pacific 8.2 MB
1935	Facing Point Locks on Switches 3.2 MB
1935	Flashing Aspects 1.3 MB
1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB
1935	Maintainers' Tool Houses 1.1 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	Removal of Switch Indicators 2.3 MB
1935	Repeating Reverse Signal Indication 2.9 MB

Southern Pines, NC 1

1935	Remote Control on the Seaboard 5.4 MB

spring switches 2

1935	FPL Adjustment on Spring Switches 1.3 MB
1935	Signaling at Spring Switches 2.6 MB

Springfield, IL 1

1935	Semi-Automatic Interlocking at a Crossing on the Alton 4.4 MB

St. Francis, WI 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

St. Louis, MO 1

1935	Safety of High Speed Trains 5.2 MB

St. Louis-San Francisco 1

1935	Advantages of Modern Relays 4.0 MB

St. Paul, MN 4

1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB

Standard Code 1

1935	Multiple Aspect Signaling 3.3 MB

Steele, VA 1

1935	Centralized Traffic Control on the Chesapeake & Ohio 6.2 MB

streamlined passenger trains 1

1935	Cab Signals and ATC on UP Streamliner 2.1 MB

Suffern, NY 1

1935	New Automatic Signals Increase Track Capacity and Safety on the Erie 6.4 MB

Suisun Bay, CA 1

1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB

switch circuit controllers 2

1935	Inspecting Switch Circuit Controllers 1.7 MB
1935	Switch-Stand Selector 1.9 MB

switch indicators 1

1935	Removal of Switch Indicators 2.3 MB

switch machines 2

1935	Obsolescence in Signaling 3.4 MB
1935	Switch-Stand Selector 1.9 MB

switch points 1

1935	Operating Long Switch Points 2.4 MB

switches 1

1935	Facing Point Locks on Switches 3.2 MB

T&P Jct., TX 1

1935	Collision on the T&P 2.0 MB

T. George Stiles 1

1935	Test Equipment for Highway Crossing Signals 1.1 MB

test equipment 1

1935	Test Equipment for Highway Crossing Signals 1.1 MB

testing 3

1935	Checking Signal Lamps 3.3 MB
1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB
1935	Test Equipment for Highway Crossing Signals 1.1 MB

Texas & New Orleans 3

1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1935	Switch-Stand Selector 1.9 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Texas & Pacific 5

1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB
1935	Collision on the T&P 2.0 MB
1935	Maintainers' Tool Houses 2.2 MB
1935	Night Intensity of Signal Lamps 2.1 MB
1935	Pole Lines for Automatic Signaling 1.6 MB

tool houses 3

1935	Maintainers' Tool Houses 2.2 MB
1935	Maintainers' Tool Houses 3.5 MB
1935	Maintainers' Tool Houses 1.1 MB

Toronto Terminals 2

1935	Circuits for Crossing Signals 1.5 MB
1935	Trap Circuits at Railroad Crossings 4.6 MB

track circuits 4

1935	An Improved Track Circuit for Light-Weight Equipment 2.4 MB
1935	DC Track Circuits 963.2 KB
1935	Respacing Automatics on the Pennsylvania 1.8 MB
1935	Safety of High Speed Trains 5.2 MB

traffic signals 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

train order operation 1

1935	Collision on the Erie 2.2 MB

transformers 1

1935	New Devices 1.5 MB

trap circuits 1

1935	Trap Circuits at Railroad Crossings 4.6 MB

Type D signals 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Type E signals 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Type SA signals 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Union Pacific 6

1935	Cab Signals and ATC on UP Streamliner 2.1 MB
1935	FPL Adjustment on Spring Switches 1.3 MB
1935	Pole Lines for Automatic Signaling 1.6 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling in Dust Storms 2.3 MB
1935	The Railways' Answer to the Demand for Speed 2.8 MB

Union Switch & Signal 6

1935	An Under-Voltage Relay 1.2 MB
1935	Cab Signals and ATC on UP Streamliner 2.1 MB
1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB
1935	Coded Track Circuit Control 1.5 MB
1935	Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB
1935	Remote Control on the Seaboard 5.4 MB

UP M-10001 1

1935	Cab Signals and ATC on UP Streamliner 2.1 MB

Wabash 2

1935	Automatic Interlocking on the Wabash 2.9 MB
1935	Semi-Automatic Interlocking at a Crossing on the Alton 4.4 MB

Waltham, MA 1

1935	New Signaling on the Boston & Maine 9.9 MB

Wampum, PA 1

1935	Centralized Traffic Control Installed on the Pittsburgh & Lake Erie 12.9 MB

Washington, DC 3

1935	Coded Track Circuit Signaling on the Pennsylvania 9.8 MB
1935	Safety of High Speed Trains 5.2 MB
1935	Signaling for Higher Train Speeds 3.0 MB

Wells and Van Buren Sts., Chicago, IL 1

1935	New Interlocking in the Chicago Loop 4.0 MB

West Concord, MA 1

1935	New Signaling on the Boston & Maine 9.9 MB

Western Maryland 1

1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB

Western Pacific 1

1935	Depression Operation of Interlocking 2.6 MB

Western Railroad Supply 1

1935	Crossing Signals on the C&NW at Oshkosh, Wis 3.4 MB

wig wag signals 1

1935	Wig Wags Approved for PWA Projects 1.4 MB

Wilkinson, IL 1

1935	Great Western Constructs Automatic Interlocking 6.8 MB

Wilmette, IL 2

1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1935	Signaling for Higher Train Speeds 3.0 MB

Wilmington, DE 1

1935	Coded Track Circuit Signaling on the Pennsylvania 9.8 MB

Wilson Ave., Chicago, IL 1

1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB

Wyant, Leroy 1

1935	Crossing Bells at Flasher Signals 1.9 MB

Wyeville, WI 1

1935	Signaling for Higher Train Speeds 3.0 MB

X-Rays 1

1935	X-Rays in the Signal Industry 5.8 MB

York, England 1

1935	Mechanical Color Light Signals in England 1.3 MB

Zane, W. F. 1

1935	Safety of High Speed Trains 5.2 MB

Railway Signaling: 1935

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