Railway Signaling: 1935

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"TRAIN" indicator 1
Automatic Interlockings of Two Junctions Involving Spring Switches   8.9 MB
1935 1
1935 index   4.5 MB
accident 8
Accident at Automatic Plant   4.5 MB
Accident at Drawbridge   1.4 MB
Call-on Signal Involved In Accident   1.1 MB
Collision on the Erie   2.2 MB
Collision on the T&P   2.0 MB
Improving Automatic Interlockings   3.5 MB
Letter to the Editor: Use of Cab Signals   1.2 MB
Signaling for Higher Train Speeds   3.0 MB
accidents 2
Bells as Accessory Highway Crossing Protection   3.5 MB
Letter to the Editor: Highways vs. Railroads   1.7 MB
aerial cable 1
Aerial Cable Versus Open Line   3.9 MB
all-relay interlocking 2
Mechanical Plant Replaced by Electric Interlocking   7.2 MB
Western Indiana Installs All-Relay Interlocking   11.4 MB
alternating current track circuits 1
New Interlocking in the Chicago Loop   4.0 MB
Alton 2
Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
The Railways' Answer to the Demand for Speed   2.8 MB
approach lighting 1
Checking Signal Lamps   3.3 MB
aspects and indications 1
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
Atchison, Topeka & Santa Fe 6
Automatic Interlocking Involves Highway Crossing Signals   3.4 MB
Automatic Interlockings of Two Junctions Involving Spring Switches   8.9 MB
Pole Lines for Automatic Signaling   1.6 MB
Safety of High Speed Trains   5.2 MB
Signaling in Dust Storms   2.3 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Atlantic Coast Line 6
Checking Rail Ends on Drawbridges   2.5 MB
False Operation of Crossing Signals   955.2 KB
False Operation of Crossing Signals   3.3 MB
Installation of Bond Wires   4.0 MB
Maintainers' Tool Houses   3.5 MB
Standardization of Circuit Plans for Highway Crossing Signals   4.5 MB
Aurora, IL 2
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
auto-stop barriers 1
Auto Stop Installed on C&NW   7.2 MB
automatic block signaling 8
Aerial Cable Versus Open Line   3.9 MB
Call-on Signal Involved In Accident   1.1 MB
Coded Track Circuit Signaling on the Pennsylvania   9.8 MB
Multiple-Block Signaling   7.0 MB
New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
New Signaling on the Boston & Maine   9.9 MB
Pole Lines for Automatic Signaling   1.6 MB
Respacing Automatics on the Pennsylvania   1.8 MB
automatic interlocking 7
Accident at Automatic Plant   4.5 MB
Automatic Interlocking on the Brooklyn-Manhattan Transit   5.4 MB
Automatic Interlocking on the Philadelphia Elevated   6.1 MB
Automatic Interlocking on the Wabash   2.9 MB
Automatic Interlockings of Two Junctions Involving Spring Switches   8.9 MB
Great Western Constructs Automatic Interlocking   6.8 MB
Improving Automatic Interlockings   3.5 MB
automatic train control 1
Cab Signals and ATC on UP Streamliner   2.1 MB
Bagley, F. H 1
Night Check of Signal Lights   1.2 MB
Baltimore & Ohio 5
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
Disposition of Mechanical Interlocking Equipment   1.3 MB
Nickel Plating of Signal Apparatus   1.1 MB
Removal of Switch Indicators   2.3 MB
Safety of High Speed Trains   5.2 MB
Bangor, ME 1
Safety of High Speed Trains   5.2 MB
battery charger 1
New Devices   1.5 MB
Beaumont, TX 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
bonding 2
Installation of Bond Wires   1.2 MB
Installation of Bond Wires   4.0 MB
Boston & Albany 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Boston & Maine 9
Braking Distance with Signals   2.4 MB
Inspecting Switch Circuit Controllers   1.7 MB
Modern Signal Aspects on the Boston & Maine   5.1 MB
Multiple Aspect Signaling   3.3 MB
New Signaling on the Boston & Maine   9.9 MB
Obsolescence in Signaling   3.4 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Safety of High Speed Trains   5.2 MB
The Railways' Answer to the Demand for Speed   2.8 MB
Boston, MA 2
Safety of High Speed Trains   5.2 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
braking distance 8
A Problem in Spacing Signals for Higher Train Speeds   1.6 MB
Braking Distance with Signals   2.4 MB
Multiple Aspect Signaling   3.3 MB
Multiple-Block Signaling   7.0 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
Stopping Distance and Signal Spacing   1.8 MB
Brooklyn, NY 1
Automatic Interlocking on the Brooklyn-Manhattan Transit   5.4 MB
Brooklyn-Manhattan Transit 1
Automatic Interlocking on the Brooklyn-Manhattan Transit   5.4 MB
Bureau of Public Roads 2
Highway Crossing Protection With Federal Funds   2.9 MB
The Federal Crossing Protection Program   1.6 MB
cab signaling 2
Letter to the Editor: Use of Cab Signals   1.2 MB
Obsolescence in Signaling   3.4 MB
cab signals 2
Cab Signals and ATC on UP Streamliner   2.1 MB
Pole Lines for Automatic Signaling   1.6 MB
Canadian National 2
Installation of Bond Wires   4.0 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Canadian Pacific 4
False Operation of Crossing Signals   3.3 MB
Mechanical Plant Replaced by Electric Interlocking   7.2 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Trap Circuits at Railroad Crossings   4.6 MB
capacity 1
Multiple-Block Signaling   7.0 MB
centralized traffic control 6
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
Centralized Traffic Control on the Chesapeake & Ohio   6.2 MB
Centralized Traffic Control on the Texas & Pacific   5.1 MB
New Signaling on the Boston & Maine   9.9 MB
Obsolescence in Signaling   3.4 MB
Power-Off Lights at CTC Machines   2.1 MB
Chesapeake & Ohio 4
Aerial Cable Versus Open Line   3.9 MB
Centralized Traffic Control on the Chesapeake & Ohio   6.2 MB
FPL Adjustment on Spring Switches   1.3 MB
Signaling at Spring Switches   2.6 MB
Cheyenne, WY 1
Safety of High Speed Trains   5.2 MB
Chicago & North Western 13
Auto Stop Installed on C&NW   7.2 MB
Avoiding Light-Out Signal Failures   2.2 MB
Crossing Signals on the C&NW at Oshkosh, Wis   3.4 MB
Inspecting Switch Circuit Controllers   1.7 MB
Installation of Bond Wires   1.2 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
Stopping Distance and Signal Spacing   1.8 MB
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
The Railways' Answer to the Demand for Speed   2.8 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Use of Marker Lamps   1.0 MB
Chicago & Western Indiana 1
Western Indiana Installs All-Relay Interlocking   11.4 MB
Chicago Great Western 2
Great Western Constructs Automatic Interlocking   6.8 MB
Signaling at Spring Switches   2.6 MB
Chicago Rapid Transit 2
New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit   9.0 MB
New Interlocking in the Chicago Loop   4.0 MB
Chicago, Burlington & Quincy 8
Aerial Cable Versus Open Line   3.9 MB
Inspecting Switch Circuit Controllers   1.7 MB
Installation of Bond Wires   4.0 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Purple Signal Glasses   3.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
The Railways' Answer to the Demand for Speed   2.8 MB
Chicago, IL 7
New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit   9.0 MB
New Interlocking in the Chicago Loop   4.0 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
Western Indiana Installs All-Relay Interlocking   11.4 MB
Chicago, Indianapolis & Louisville 1
Removal of Switch Indicators   2.3 MB
Chicago, Milwaukee, St. Paul & Pacific 6
Automatic Interlocking on the Wabash   2.9 MB
Great Western Constructs Automatic Interlocking   6.8 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
The Railways' Answer to the Demand for Speed   2.8 MB
Chicago, Rock Island & Pacific 4
Accident at Automatic Plant   4.5 MB
Automatic OSing Devices Usde by the Rock Island   2.2 MB
Crossing Bells at Flasher Signals   1.9 MB
Western Indiana Installs All-Relay Interlocking   11.4 MB
circuit plans 1
Standardization of Circuit Plans for Highway Crossing Signals   4.5 MB
circuits 4
Auto Stop Installed on C&NW   7.2 MB
Circuit for Flashing Light Signals   3.5 MB
Circuit for Flashing Light Signals   3.6 MB
Circuits for Crossing Signals   1.5 MB
Cleveland, OH 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Clifton Forge, VA 1
Centralized Traffic Control on the Chesapeake & Ohio   6.2 MB
code line 1
Aerial Cable Versus Open Line   3.9 MB
coded track circuits 3
Coded Track Circuit Control   1.5 MB
Coded Track Circuit Signaling on the Pennsylvania   9.8 MB
Pole Lines for Automatic Signaling   1.6 MB
color light signals 6
Avoiding Light-Out Signal Failures   2.2 MB
Avoiding Light-Out Signal Failures   1.2 MB
Mechanical Color Light Signals in England   1.3 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Night Check of Signal Lights   1.2 MB
Night Intensity of Signal Lamps   2.6 MB
color position light signals 1
Multiple Aspect Signaling   3.3 MB
color specifications 2
Purple Signal Glasses   3.6 MB
Purple Signal Glasses   3.3 MB
Colorado & Southern 1
Installation of Bond Wires   4.0 MB
communication circuits 1
Pole Lines for Automatic Signaling   1.6 MB
Covington, VA 1
Centralized Traffic Control on the Chesapeake & Ohio   6.2 MB
Crestline, OH 1
Respacing Automatics on the Pennsylvania   1.8 MB
crossing barriers 1
Auto Stop Installed on C&NW   7.2 MB
crossing bells 1
Crossing Bells at Flasher Signals   1.9 MB
crossing flashers 3
Alining Flashers   3.2 MB
Circuit for Flashing Light Signals   3.5 MB
Circuit for Flashing Light Signals   3.6 MB
Dallas, TX 2
Centralized Traffic Control on the Texas & Pacific   5.1 MB
Collision on the T&P   2.0 MB
Dayton, TX 1
Switch-Stand Selector   1.9 MB
DC track circuits 1
DC Track Circuits   963.2 KB
De Kalb, IL 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Delaware, Lackawanna & Western 2
Call-on Signal Involved In Accident   1.1 MB
Multiple Aspect Signaling   3.3 MB
Delson, Quebec 1
Mechanical Plant Replaced by Electric Interlocking   7.2 MB
Denver, CO 1
Safety of High Speed Trains   5.2 MB
Des Moines, IA 1
Auto Stop Installed on C&NW   7.2 MB
detector bars 1
New Interlocking in the Chicago Loop   4.0 MB
disc signals 1
Obsolescence in Signaling   3.4 MB
DNL-41 relay 1
An Under-Voltage Relay   1.2 MB
drawbridge 1
Accident at Drawbridge   1.4 MB
dust storms 1
Signaling in Dust Storms   2.3 MB
East Springfield, IL 1
Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
Eck, W. J. 1
Crossing Bells at Flasher Signals   1.9 MB
El Paso, TX 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
electric interlocking 1
New York Central Extends South Bend Interlocking   6.0 MB
electric lock switches 1
Depression Operation of Interlocking   2.6 MB
electro-pneumatic interlocking 2
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
New Interlocking in the Chicago Loop   4.0 MB
Elgin, Joliet & Eastern 1
Purple Signal Glasses   3.3 MB
Emergency Relief Appropriation Act 2
Highway Crossing Protection With Federal Funds   2.9 MB
The Federal Crossing Protection Program   1.6 MB
Erie 3
Collision on the Erie   2.2 MB
Multiple Aspect Signaling   3.3 MB
New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
facing point locks 2
Facing Point Locks on Switches   3.2 MB
FPL Adjustment on Spring Switches   1.3 MB
federal highway improvement program 1
Highway-Railroad Crossing Signals Installed at Federal Expense   1.2 MB
flashing aspects 2
Flashing Aspects   1.3 MB
Multiple Aspect Signaling   3.3 MB
flashing light signals 2
Crossing Bells at Flasher Signals   1.9 MB
Letter to the Editor: Highways vs. Railroads   1.7 MB
Florida East Coast 2
Accident at Drawbridge   1.4 MB
Signaling for Higher Train Speeds   3.0 MB
Folsom Place, WI 1
New Signaling on the Route of the C&NW "400"   9.6 MB
Ft. Wayne, IN 2
Respacing Automatics on the Pennsylvania   1.8 MB
Signaling for Higher Train Speeds   3.0 MB
Ft. Worth, TX 1
Centralized Traffic Control on the Texas & Pacific   5.1 MB
fundamental practices 1
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
Gault, P. M. 1
Crossing Bells at Flasher Signals   1.9 MB
General Electric 2
Signal Night for New York Railroad Club   1.1 MB
Signal Transformers   2.2 MB
General Railway Signal 9
Advantages of Modern Relays   4.0 MB
Centralized Traffic Control on the Texas & Pacific   5.1 MB
Crossing Signals on the Southern   1.4 MB
Ground Detector Relay for Instantaneous and Automatic Detection   2.3 MB
New Signaling on the Boston & Maine   9.9 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
New York Central Extends South Bend Interlocking   6.0 MB
Power Transfer Relay   1.3 MB
Snubbing Rectifier for 2A Signal   1.9 MB
Grand Central Terminal 1
Multiple-Block Signaling   7.0 MB
Grand Prairie, TX 1
Centralized Traffic Control on the Texas & Pacific   5.1 MB
Grand Trunk Western 1
New York Central Extends South Bend Interlocking   6.0 MB
Great Northern 4
Checking Signal Lamps   3.3 MB
FPL Adjustment on Spring Switches   1.3 MB
Letter to the Editor- Crossing Protection Situation   2.7 MB
Signaling at Spring Switches   2.6 MB
ground detector relay 1
Ground Detector Relay for Instantaneous and Automatic Detection   2.3 MB
Gulf, Mobile & Northern 1
Safety of High Speed Trains   5.2 MB
Hall disc signals 1
New Signaling on the Route of the C&NW "400"   9.6 MB
Harrison, NJ 1
Call-on Signal Involved In Accident   1.1 MB
high-speed trains 8
A Problem in Spacing Signals for Higher Train Speeds   1.6 MB
An Improved Track Circuit for Light-Weight Equipment   2.4 MB
Multiple Aspect Signaling   3.3 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
Stopping Distance and Signal Spacing   1.8 MB
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
Highland Park, IL 2
Signaling for Higher Train Speeds   3.0 MB
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
highway crossings 23
Alining Flashers   3.2 MB
Auto Stop Installed on C&NW   7.2 MB
Automatic Interlocking Involves Highway Crossing Signals   3.4 MB
Bells as Accessory Highway Crossing Protection   3.5 MB
Circuit for Flashing Light Signals   3.5 MB
Circuit for Flashing Light Signals   3.6 MB
Circuits for Crossing Signals   1.5 MB
Crossing Bells at Flasher Signals   1.9 MB
Crossing Signals on the C&NW at Oshkosh, Wis   3.4 MB
Crossing Signals on the Southern   1.4 MB
False Operation of Crossing Signals   955.2 KB
False Operation of Crossing Signals   3.3 MB
Highway Crossing Protection With Federal Funds   2.9 MB
Highway-Railroad Crossing Signals Installed at Federal Expense   1.2 MB
Improving Crossing Protection   1.2 MB
Letter to the Editor- Crossing Protection Situation   2.7 MB
Letter to the Editor: Highways vs. Railroads   1.7 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Standardization of Circuit Plans for Highway Crossing Signals   4.5 MB
Test Equipment for Highway Crossing Signals   1.1 MB
The Federal Crossing Protection Program   1.6 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Wig Wags Approved for PWA Projects   1.4 MB
highway safety 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Hobart, IN 2
Respacing Automatics on the Pennsylvania   1.8 MB
Signaling for Higher Train Speeds   3.0 MB
Howson, E. T. 1
Safety of High Speed Trains   5.2 MB
Illinois Central 1
Night Check of Signal Lights   1.2 MB
index 1
1935 index   4.5 MB
Indian Hill, IL 1
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
indication locking 1
Repeating Reverse Signal Indication   2.9 MB
inspections 1
X-Rays in the Signal Industry   5.8 MB
interlocking 21
Accident at Automatic Plant   4.5 MB
Automatic Interlocking Involves Highway Crossing Signals   3.4 MB
Automatic Interlocking on the Brooklyn-Manhattan Transit   5.4 MB
Automatic Interlocking on the Philadelphia Elevated   6.1 MB
Automatic Interlocking on the Wabash   2.9 MB
Automatic Interlockings of Two Junctions Involving Spring Switches   8.9 MB
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
Checking Rail Ends on Drawbridges   2.5 MB
Depression Operation of Interlocking   2.6 MB
Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
Great Western Constructs Automatic Interlocking   6.8 MB
Improving Automatic Interlockings   3.5 MB
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
Mechanical Plant Replaced by Electric Interlocking   7.2 MB
New Interlocking in the Chicago Loop   4.0 MB
New York Central Extends South Bend Interlocking   6.0 MB
Repeating Reverse Signal Indication   2.9 MB
Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
Trap Circuits at Railroad Crossings   4.6 MB
Use of Marker Lamps   1.0 MB
Western Indiana Installs All-Relay Interlocking   11.4 MB
interlocking consolidation 1
Obsolescence in Signaling   3.4 MB
Interstate Commerce Commission 4
Accident at Automatic Plant   4.5 MB
Call-on Signal Involved In Accident   1.1 MB
Collision on the T&P   2.0 MB
Letter to the Editor: Highways vs. Railroads   1.7 MB
Iowa Board of Railroad Commissioners 1
Accident at Automatic Plant   4.5 MB
Jupiter, FL 1
Accident at Drawbridge   1.4 MB
Kansas City Southern 1
Installation of Bond Wires   4.0 MB
Kansas City, MO 1
Safety of High Speed Trains   5.2 MB
Lagny, France 1
Letter to the Editor: Use of Cab Signals   1.2 MB
Lake, WI 1
Safety of High Speed Trains   5.2 MB
Lakewood, OH 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
light-out circuits 2
Avoiding Light-Out Signal Failures   2.2 MB
Avoiding Light-Out Signal Failures   1.2 MB
lightweight trains 1
An Improved Track Circuit for Light-Weight Equipment   2.4 MB
Lincoln, NE 1
Safety of High Speed Trains   5.2 MB
line circuits 2
Aerial Cable Versus Open Line   3.9 MB
Pole Lines for Automatic Signaling   1.6 MB
London & North Eastern 1
Mechanical Color Light Signals in England   1.3 MB
Los Angeles, CA 2
Automatic Interlockings of Two Junctions Involving Spring Switches   8.9 MB
Safety of High Speed Trains   5.2 MB
Louisville & Nashville 4
Checking Rail Ends on Drawbridges   2.5 MB
Removal of Switch Indicators   2.3 MB
Signaling at Spring Switches   2.6 MB
Trap Circuits at Railroad Crossings   4.6 MB
lower quadrant semaphores 1
Obsolescence in Signaling   3.4 MB
lunar white 2
Letter to the Editor- Comment on Multiple Aspects   1.5 MB
Multiple Aspect Signaling   3.3 MB
Maine Central 2
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
The Railways' Answer to the Demand for Speed   2.8 MB
maintainers' quarters 2
Maintainers' Tool Houses   3.5 MB
Maintainers' Tool Houses   1.1 MB
marker lamps 1
Use of Marker Lamps   1.0 MB
Martinez, CA 1
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
Mayfair, IL 2
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
McKeesport, PA 1
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
mechanical color light signals 1
Mechanical Color Light Signals in England   1.3 MB
mechanical interlocking 3
Depression Operation of Interlocking   2.6 MB
Disposition of Mechanical Interlocking Equipment   1.3 MB
Mechanical Plant Replaced by Electric Interlocking   7.2 MB
mechanical signals 1
Mechanical Color Light Signals in England   1.3 MB
Michigan Central 1
New York Central Extends South Bend Interlocking   6.0 MB
Milwaukee, WI 4
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
Miner, WI 2
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
Minneapolis & St. Louis 1
Accident at Automatic Plant   4.5 MB
Minneapolis, MN 2
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Missouri Pacific 5
Crossing Bells at Flasher Signals   1.9 MB
Disposition of Mechanical Interlocking Equipment   1.3 MB
Facing Point Locks on Switches   3.2 MB
Flashing Aspects   1.3 MB
Signaling in Dust Storms   2.3 MB
Missouri-Kansas-Texas 3
Avoiding Light-Out Signal Failures   1.2 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Signaling in Dust Storms   2.3 MB
Model 2A semaphore 1
Snubbing Rectifier for 2A Signal   1.9 MB
Model 5 electric interlocking 1
New York Central Extends South Bend Interlocking   6.0 MB
Modena, PA 1
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Moravia, IA 1
Automatic Interlocking on the Wabash   2.9 MB
Morgan, H. G. 1
Night Check of Signal Lights   1.2 MB
Morning Sun, IA 2
Accident at Automatic Plant   4.5 MB
Improving Automatic Interlockings   3.5 MB
Mott Haven, NY 1
Multiple-Block Signaling   7.0 MB
movable bridges 2
Checking Rail Ends on Drawbridges   2.5 MB
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
MQ Crossing, NY 1
Collision on the Erie   2.2 MB
multiple-aspect signaling 3
Letter to the Editor- Comment on Multiple Aspects   1.5 MB
Multiple Aspect Signaling   3.3 MB
Multiple-Block Signaling   7.0 MB
Myrtle Avenue Line, Brooklyn, NY 1
Automatic Interlocking on the Brooklyn-Manhattan Transit   5.4 MB
Nadeau, CA 1
Automatic Interlocking Involves Highway Crossing Signals   3.4 MB
New Castle Jct., PA 1
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
New York Central 12
Aerial Cable Versus Open Line   3.9 MB
Avoiding Light-Out Signal Failures   1.2 MB
DC Track Circuits   963.2 KB
Disposition of Mechanical Interlocking Equipment   1.3 MB
Facing Point Locks on Switches   3.2 MB
Installation of Bond Wires   4.0 MB
Multiple Aspect Signaling   3.3 MB
Multiple-Block Signaling   7.0 MB
New York Central Extends South Bend Interlocking   6.0 MB
Purple Signal Glasses   3.3 MB
Safety of High Speed Trains   5.2 MB
Signal Night for New York Railroad Club   1.1 MB
New York subway 1
Signal Night for New York Railroad Club   1.1 MB
New York, Chicago & St. Louis 3
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Signaling at Spring Switches   2.6 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
New York, New Haven & Hartford 4
"Chattering" Slot Arms   2.3 MB
Checking Rail Ends on Drawbridges   2.5 MB
Multiple-Block Signaling   7.0 MB
The Railways' Answer to the Demand for Speed   2.8 MB
New York, NY 4
Automatic Interlocking on the Brooklyn-Manhattan Transit   5.4 MB
Multiple-Block Signaling   7.0 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
nickel plating 1
Nickel Plating of Signal Apparatus   1.1 MB
Noble, S. E. 1
New Signaling on the Route of the C&NW "400"   9.6 MB
Norden, CA 1
Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
Northern Pacific 3
Checking Signal Lamps   3.3 MB
False Operation of Crossing Signals   3.3 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Oakdale, IL 1
Western Indiana Installs All-Relay Interlocking   11.4 MB
obsolete equipment 1
Obsolescence in Signaling   3.4 MB
obsolete signal facilities 1
Obsolescence in Signaling   3.4 MB
Omaha, NE 1
Safety of High Speed Trains   5.2 MB
OS device 1
Automatic OSing Devices Usde by the Rock Island   2.2 MB
Oshkosh, WI 1
Crossing Signals on the C&NW at Oshkosh, Wis   3.4 MB
overhauling 1
Obsolescence in Signaling   3.4 MB
Peerless Manufacturing 1
Snubbing Relay for Semaphores   1.0 MB
Pennsylvania 13
Coded Track Circuit Signaling on the Pennsylvania   9.8 MB
Facing Point Locks on Switches   3.2 MB
FPL Adjustment on Spring Switches   1.3 MB
Installation of Bond Wires   4.0 MB
Letter to the Editor- Comment on Multiple Aspects   1.5 MB
Operating Long Switch Points   2.4 MB
Pole Lines for Automatic Signaling   1.6 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Respacing Automatics on the Pennsylvania   1.8 MB
Safety of High Speed Trains   5.2 MB
Signal Night for New York Railroad Club   1.1 MB
Signaling for Higher Train Speeds   3.0 MB
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
Pere Marquette 1
Circuit for Flashing Light Signals   3.5 MB
Philadelphia Rapid Transit 1
Automatic Interlocking on the Philadelphia Elevated   6.1 MB
Philadelphia, PA 1
Automatic Interlocking on the Philadelphia Elevated   6.1 MB
Pineville, NC 1
Crossing Signals on the Southern   1.4 MB
Pittsburgh & Lake Erie 1
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
pole lines 1
Pole Lines for Automatic Signaling   1.6 MB
Portland, OR 1
Safety of High Speed Trains   5.2 MB
position light signals 3
Coded Track Circuit Signaling on the Pennsylvania   9.8 MB
Multiple Aspect Signaling   3.3 MB
Respacing Automatics on the Pennsylvania   1.8 MB
power switches 1
Remote Control on the Seaboard   5.4 MB
power transfer relays 2
An Under-Voltage Relay   1.2 MB
Power Transfer Relay   1.3 MB
power-off indications 1
Power-Off Lights at CTC Machines   2.1 MB
primary battery cell 1
New Devices   1.5 MB
Public Works Administration 2
Standardization of Circuit Plans for Highway Crossing Signals   4.5 MB
Wig Wags Approved for PWA Projects   1.4 MB
purple 3
Multiple Aspect Signaling   3.3 MB
Purple Signal Glasses   3.6 MB
Purple Signal Glasses   3.3 MB
rail locks 1
Checking Rail Ends on Drawbridges   2.5 MB
Railway Signal Association 1
Letter to the Editor- Comment on Multiple Aspects   1.5 MB
Reading 2
Alining Flashers   3.2 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
rectifiers 1
New Devices   1.5 MB
red center purple glass 1
Purple Signal Glasses   3.3 MB
red center purple lenses 1
Purple Signal Glasses   3.3 MB
relay 2
An Under-Voltage Relay   1.2 MB
Ground Detector Relay for Instantaneous and Automatic Detection   2.3 MB
relays 5
Advantages of Modern Relays   4.0 MB
Circuits for Crossing Signals   1.5 MB
New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit   9.0 MB
Obsolescence in Signaling   3.4 MB
Power Transfer Relay   1.3 MB
remote control 3
Obsolescence in Signaling   3.4 MB
Power-Off Lights at CTC Machines   2.1 MB
Remote Control on the Seaboard   5.4 MB
repair shop 1
New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit   9.0 MB
reserve yellow 2
Avoiding Light-Out Signal Failures   2.2 MB
Avoiding Light-Out Signal Failures   1.2 MB
Rhea, Frank 1
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
Ridgewood Jct., NJ 1
New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
Ridgewood, NJ 1
New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
Rondout, IL 1
Signaling for Higher Train Speeds   3.0 MB
Rudd, A. H. 4
Letter to the Editor- Comment on Multiple Aspects   1.5 MB
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Signal Night for New York Railroad Club   1.1 MB
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
Rudd-Rhea report 1
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
Russell, IL 1
Safety of High Speed Trains   5.2 MB
Rutherford Jct., NJ 1
New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
Salina, KS 1
Safety of High Speed Trains   5.2 MB
San Francisco, CA 1
Safety of High Speed Trains   5.2 MB
San Jose, CA 1
Depression Operation of Interlocking   2.6 MB
Seaboard Air Line 4
Installation of Bond Wires   4.0 MB
Night Check of Signal Lights   1.2 MB
Remote Control on the Seaboard   5.4 MB
Removal of Switch Indicators   2.3 MB
searchlight signals 4
Avoiding Light-Out Signal Failures   1.2 MB
Multiple Aspect Signaling   3.3 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Repeating Reverse Signal Indication   2.9 MB
semaphore signals 5
"Chattering" Slot Arms   2.3 MB
Night Check of Signal Lights   1.2 MB
Repeating Reverse Signal Indication   2.9 MB
Snubbing Rectifier for 2A Signal   1.9 MB
Snubbing Relay for Semaphores   1.0 MB
semi-automatic interlocking 1
Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
show sheds 1
Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
Sierra Nevada mountains 1
Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
signal aspects 7
Flashing Aspects   1.3 MB
Modern Signal Aspects on the Boston & Maine   5.1 MB
Multiple Aspect Signaling   3.3 MB
Multiple-Block Signaling   7.0 MB
Purple Signal Glasses   3.6 MB
Purple Signal Glasses   3.3 MB
Use of Marker Lamps   1.0 MB
signal colors 3
Multiple Aspect Signaling   3.3 MB
Purple Signal Glasses   3.6 MB
Purple Signal Glasses   3.3 MB
signal indications 1
Collision on the T&P   2.0 MB
signal lamps 2
Checking Signal Lamps   3.3 MB
Night Intensity of Signal Lamps   2.6 MB
signal lighting 2
Night Check of Signal Lights   1.2 MB
Night Intensity of Signal Lamps   2.1 MB
signal maintainers 1
Maintainers' Tool Houses   2.2 MB
signal mechanisms 1
Obsolescence in Signaling   3.4 MB
signal spacing 8
A Problem in Spacing Signals for Higher Train Speeds   1.6 MB
Braking Distance with Signals   2.4 MB
Multiple Aspect Signaling   3.3 MB
New Signaling on the Route of the C&NW "400"   9.6 MB
Respacing Automatics on the Pennsylvania   1.8 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
Stopping Distance and Signal Spacing   1.8 MB
signal standards 1
The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
signal transformers 1
Signal Transformers   2.2 MB
signaling 2
Remote Control on the Seaboard   5.4 MB
Signaling at Spring Switches   2.6 MB
slot arms 1
"Chattering" Slot Arms   2.3 MB
snubbing rectifier 1
Snubbing Rectifier for 2A Signal   1.9 MB
snubbing relay 1
Snubbing Relay for Semaphores   1.0 MB
South Acton, MA 1
New Signaling on the Boston & Maine   9.9 MB
South Bend, IN 1
New York Central Extends South Bend Interlocking   6.0 MB
South Street, PA 1
Automatic Interlocking on the Philadelphia Elevated   6.1 MB
Southern 6
Crossing Bells at Flasher Signals   1.9 MB
Crossing Signals on the Southern   1.4 MB
Facing Point Locks on Switches   3.2 MB
Installation of Bond Wires   4.0 MB
Maintainers' Tool Houses   2.2 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Southern Pacific 12
Automatic Interlocking Involves Highway Crossing Signals   3.4 MB
Checking Rail Ends on Drawbridges   2.5 MB
Checking Signal Lamps   3.3 MB
Depression Operation of Interlocking   2.6 MB
Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
Facing Point Locks on Switches   3.2 MB
Flashing Aspects   1.3 MB
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
Maintainers' Tool Houses   1.1 MB
Multiple Aspect Signaling   3.3 MB
Removal of Switch Indicators   2.3 MB
Repeating Reverse Signal Indication   2.9 MB
Southern Pines, NC 1
Remote Control on the Seaboard   5.4 MB
spring switches 2
FPL Adjustment on Spring Switches   1.3 MB
Signaling at Spring Switches   2.6 MB
Springfield, IL 1
Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
St. Francis, WI 1
New Signaling on the Route of the C&NW "400"   9.6 MB
St. Louis, MO 1
Safety of High Speed Trains   5.2 MB
St. Louis-San Francisco 1
Advantages of Modern Relays   4.0 MB
St. Paul, MN 4
New Signaling on the Route of the C&NW "400"   9.6 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
The "400" to Run on Six and One Half Hour Schedule   942.0 KB
Standard Code 1
Multiple Aspect Signaling   3.3 MB
Steele, VA 1
Centralized Traffic Control on the Chesapeake & Ohio   6.2 MB
streamlined passenger trains 1
Cab Signals and ATC on UP Streamliner   2.1 MB
Suffern, NY 1
New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
Suisun Bay, CA 1
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
switch circuit controllers 2
Inspecting Switch Circuit Controllers   1.7 MB
Switch-Stand Selector   1.9 MB
switch indicators 1
Removal of Switch Indicators   2.3 MB
switch machines 2
Obsolescence in Signaling   3.4 MB
Switch-Stand Selector   1.9 MB
switch points 1
Operating Long Switch Points   2.4 MB
switches 1
Facing Point Locks on Switches   3.2 MB
T&P Jct., TX 1
Collision on the T&P   2.0 MB
T. George Stiles 1
Test Equipment for Highway Crossing Signals   1.1 MB
test equipment 1
Test Equipment for Highway Crossing Signals   1.1 MB
testing 3
Checking Signal Lamps   3.3 MB
New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit   9.0 MB
Test Equipment for Highway Crossing Signals   1.1 MB
Texas & New Orleans 3
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Switch-Stand Selector   1.9 MB
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
Texas & Pacific 5
Centralized Traffic Control on the Texas & Pacific   5.1 MB
Collision on the T&P   2.0 MB
Maintainers' Tool Houses   2.2 MB
Night Intensity of Signal Lamps   2.1 MB
Pole Lines for Automatic Signaling   1.6 MB
tool houses 3
Maintainers' Tool Houses   2.2 MB
Maintainers' Tool Houses   3.5 MB
Maintainers' Tool Houses   1.1 MB
Toronto Terminals 2
Circuits for Crossing Signals   1.5 MB
Trap Circuits at Railroad Crossings   4.6 MB
track circuits 4
An Improved Track Circuit for Light-Weight Equipment   2.4 MB
DC Track Circuits   963.2 KB
Respacing Automatics on the Pennsylvania   1.8 MB
Safety of High Speed Trains   5.2 MB
traffic signals 1
Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
train order operation 1
Collision on the Erie   2.2 MB
transformers 1
New Devices   1.5 MB
trap circuits 1
Trap Circuits at Railroad Crossings   4.6 MB
Type D signals 1
New Signaling on the Route of the C&NW "400"   9.6 MB
Type E signals 1
New Signaling on the Route of the C&NW "400"   9.6 MB
Type SA signals 1
New Signaling on the Route of the C&NW "400"   9.6 MB
Union Pacific 6
Cab Signals and ATC on UP Streamliner   2.1 MB
FPL Adjustment on Spring Switches   1.3 MB
Pole Lines for Automatic Signaling   1.6 MB
Safety of High Speed Trains   5.2 MB
Signaling in Dust Storms   2.3 MB
The Railways' Answer to the Demand for Speed   2.8 MB
Union Switch & Signal 6
An Under-Voltage Relay   1.2 MB
Cab Signals and ATC on UP Streamliner   2.1 MB
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
Coded Track Circuit Control   1.5 MB
Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
Remote Control on the Seaboard   5.4 MB
UP M-10001 1
Cab Signals and ATC on UP Streamliner   2.1 MB
Wabash 2
Automatic Interlocking on the Wabash   2.9 MB
Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
Waltham, MA 1
New Signaling on the Boston & Maine   9.9 MB
Wampum, PA 1
Centralized Traffic Control Installed on the Pittsburgh & Lake Erie   12.9 MB
Washington, DC 3
Coded Track Circuit Signaling on the Pennsylvania   9.8 MB
Safety of High Speed Trains   5.2 MB
Signaling for Higher Train Speeds   3.0 MB
Wells and Van Buren Sts., Chicago, IL 1
New Interlocking in the Chicago Loop   4.0 MB
West Concord, MA 1
New Signaling on the Boston & Maine   9.9 MB
Western Maryland 1
Preventing Unnecessary Operation of Highway-Railroad Crossing Signals   4.3 MB
Western Pacific 1
Depression Operation of Interlocking   2.6 MB
Western Railroad Supply 1
Crossing Signals on the C&NW at Oshkosh, Wis   3.4 MB
wig wag signals 1
Wig Wags Approved for PWA Projects   1.4 MB
Wilkinson, IL 1
Great Western Constructs Automatic Interlocking   6.8 MB
Wilmette, IL 2
New Signaling on the Route of the C&NW "400"   9.6 MB
Signaling for Higher Train Speeds   3.0 MB
Wilmington, DE 1
Coded Track Circuit Signaling on the Pennsylvania   9.8 MB
Wilson Ave., Chicago, IL 1
New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit   9.0 MB
Wyant, Leroy 1
Crossing Bells at Flasher Signals   1.9 MB
Wyeville, WI 1
Signaling for Higher Train Speeds   3.0 MB
X-Rays 1
X-Rays in the Signal Industry   5.8 MB
York, England 1
Mechanical Color Light Signals in England   1.3 MB
Zane, W. F. 1
Safety of High Speed Trains   5.2 MB

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