Railway Signaling: 1940

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"S" markers 1
Entering the Main Line   1.3 MB
1940 1
1940 index   3.9 MB
33rd Street, New York, NY 1
Interlocking on the Hudson & Manhattan   6.8 MB
absolute permissive block signaling 3
Entering the Main Line   1.3 MB
Proceeding By a Head-Block Signal   1.9 MB
Single-Track Signaling   2.5 MB
accident 2
Panama Limited Collides With Louisiane   1.0 MB
Two Accidents on the Illinois Central   2.8 MB
accidents 1
ATC Tests Ordered   676.8 KB
Almeda, IN 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
ammeter 1
Hook-On Volt-Ammeter   1.3 MB
Anoka, IN 1
11,000-Ft. Coded Track Circuits   13.6 MB
Arcola, IL 2
Panama Limited Collides With Louisiane   1.0 MB
Two Accidents on the Illinois Central   2.8 MB
Ashburn, Chicago, IL 2
Gates, Signals and Traffic Lights at a Wabash Crossing   6.8 MB
Interlockings Installed at Two Crossings   6.5 MB
automatic block signaling 10
11,000-Ft. Coded Track Circuits   13.6 MB
A Review of 1939 and a Glance Into 1940   1.6 MB
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
Entering the Main Line   1.3 MB
Intermediate Signal Spacing and Control   2.1 MB
New Automatic Block Signaling on the Milwaukee   6.3 MB
New Signaling on the Wabash   8.1 MB
Proceeding By a Head-Block Signal   1.9 MB
Single-Track Signaling   2.5 MB
Southern Pacific Petition Denied   3.0 MB
automatic train stop 4
ATC Tests Ordered   676.8 KB
Illinois Central Order   1.3 MB
Panama Limited Collides With Louisiane   1.0 MB
Two Accidents on the Illinois Central   2.8 MB
Belt Railway of Chicago 1
Interlockings Installed at Two Crossings   6.5 MB
Ben Davis, IN 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Beulah, MN 1
New Automatic Block Signaling on the Milwaukee   6.3 MB
block 1
A Change in the Requisites, Definitions and Regulations   1.2 MB
block length 1
Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
bonding 1
Cadweld (Thermex) Signal Bonds   996.4 KB
Bradford, OH 1
11,000-Ft. Coded Track Circuits   13.6 MB
braking distance 1
Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
Buchanan Branch 1
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
cab signaling 2
ATC Tests Ordered   676.8 KB
Illinois Central Order   1.3 MB
Cadosia, NY 1
CTC on the New York, Ontario & Western   8.2 MB
Cadweld 1
Cadweld (Thermex) Signal Bonds   996.4 KB
Casey, IL 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
CD code-following relays 1
Plug Couplers for Relays and Signals   1.3 MB
centralized traffic control 7
A Change in the Requisites, Definitions and Regulations   1.2 MB
A Review of 1939 and a Glance Into 1940   1.6 MB
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
CTC on the New York, Ontario & Western   8.2 MB
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Single-Track Signaling   2.5 MB
Train Order Signals   4.2 MB
centrifugal relays 1
Plug Couplers for Relays and Signals   1.3 MB
Chesapeake & Ohio 1
Single-Track Signaling   2.5 MB
Chicago, Burlington & Quincy 1
A Change in the Requisites, Definitions and Regulations   1.2 MB
Chicago, IL 2
Gates, Signals and Traffic Lights at a Wabash Crossing   6.8 MB
Interlockings Installed at Two Crossings   6.5 MB
Chicago, Milwaukee, St. Paul & Pacific 2
Drafting Boards   1.8 MB
New Automatic Block Signaling on the Milwaukee   6.3 MB
Chicago, Rock Island & Pacific 1
Obituary: Leroy Wyant   1.0 MB
cleaning 1
Signal Lens Cleaner   1.1 MB
Clearing Yard, Chicago, IL 1
Interlockings Installed at Two Crossings   6.5 MB
Cleveland, Cincinnati, Chicago & St. Louis 1
Mechanical Plant Modernized   4.2 MB
code transmitter 2
Coded Track Control   2.5 MB
New Code Transmitter   2.1 MB
code-following relay 1
Coded Track Control   2.5 MB
coded track circuits 4
11,000-Ft. Coded Track Circuits   13.6 MB
A Review of 1939 and a Glance Into 1940   1.6 MB
Coded Signaling Control System on the Norfolk & Western   10.0 MB
Coded Track Control   2.5 MB
Cold Springs, OH 1
Mechanical Plant Modernized   4.2 MB
color light signals 1
Signal Lens Cleaner   1.1 MB
Corcoran, J. J. 1
Personal: Changes on the New York Central   2.2 MB
Cornwall, NY 1
CTC on the New York, Ontario & Western   8.2 MB
DC coded track circuits 1
11,000-Ft. Coded Track Circuits   13.6 MB
DC coding units 1
Plug Couplers for Relays and Signals   1.3 MB
decoder units 1
Coded Track Control   2.5 MB
Detroit River tunnel 1
New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
Devon, WV 1
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
distant signals 1
Southern Pacific Petition Denied   3.0 MB
DM code transmitter 1
New Code Transmitter   2.1 MB
DN-11 relay 1
Plug Couplers for Relays and Signals   1.3 MB
DP-14 relay 1
Plug Couplers for Relays and Signals   1.3 MB
drafting 1
Drafting Boards   1.8 MB
electric lock switches 1
Entering the Main Line   1.3 MB
electro-pneumatic interlocking 1
Interlocking on the Hudson & Manhattan   6.8 MB
Elliott, W. H. 1
Personal: Changes on the New York Central   2.2 MB
Elsworth, R. B. 1
Personal: Changes on the New York Central   2.2 MB
facing point locks 2
Facing Point Lock for Spring Switches   1.2 MB
Facing Point Locks On Main Line Switches   2.6 MB
Farrington, IL 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Ferguson, MO 1
New Signaling on the Wabash   8.1 MB
fire 2
Fire Destroys Tower of Large Interlocking at St. Louis   2.0 MB
St. Louis Terminal   403.1 KB
flagging 1
Entering the Main Line   1.3 MB
flasher relay 1
Flasher Relay   1.7 MB
Gardnerville, MO 1
New Signaling on the Wabash   8.1 MB
General Railway Signal 7
Coded Track Control   2.5 MB
Controller Adjuster   1.3 MB
Facing Point Lock for Spring Switches   1.2 MB
Interlockings Installed at Two Crossings   6.5 MB
New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
New Searchlight Signal   2.7 MB
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
Giard, MN 1
New Automatic Block Signaling on the Milwaukee   6.3 MB
Grand Trunk Western 1
Interlockings Installed at Two Crossings   6.5 MB
H searchlight signals 1
Plug Couplers for Relays and Signals   1.3 MB
H-2 searchlight signals 1
Plug Couplers for Relays and Signals   1.3 MB
H-5 searchlight signals 1
New Signaling on the Wabash   8.1 MB
Haigh, A. S. 1
Personal: Changes on the New York Central   2.2 MB
Hayford, Chicago, IL 1
Interlockings Installed at Two Crossings   6.5 MB
highway crossings 2
Gates, Signals and Traffic Lights at a Wabash Crossing   6.8 MB
Wabash Installs Gate and Signal Protection for All Crossings in Lafayette   4.9 MB
Home Creek, VA 1
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
Hudson & Manhattan 1
Interlocking on the Hudson & Manhattan   6.8 MB
Illinois Central 4
ATC Tests Ordered   676.8 KB
Illinois Central Order   1.3 MB
Panama Limited Collides With Louisiane   1.0 MB
Two Accidents on the Illinois Central   2.8 MB
Independent Subway System 1
Signal Lens Cleaner   1.1 MB
index 1
1940 index   3.9 MB
insulated joints 1
Testing Insulated Joints   2.1 MB
insulators 1
Southern Pacific Washes Insulators   1.5 MB
interlocking 9
A Change in the Requisites, Definitions and Regulations   1.2 MB
Interlocking on the Hudson & Manhattan   6.8 MB
Interlockings Installed at Two Crossings   6.5 MB
Movable Interlocking Towers   1.2 MB
New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Remote Control On the Southern   3.8 MB
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
Trap Circuit   872.0 KB
interlocking towers 1
Movable Interlocking Towers   1.2 MB
Interstate Commerce Commission 7
A Change in the Requisites, Definitions and Regulations   1.2 MB
A Review of 1939 and a Glance Into 1940   1.6 MB
ATC Tests Ordered   676.8 KB
Illinois Central Order   1.3 MB
Single-Track Signaling   2.5 MB
Southern Pacific Petition Denied   3.0 MB
Trap Circuit   872.0 KB
Key System 1
Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
Knoxville, TN 1
Remote Control On the Southern   3.8 MB
Lafayette, IN 1
Wabash Installs Gate and Signal Protection for All Crossings in Lafayette   4.9 MB
lenses 1
Signal Lens Cleaner   1.1 MB
Limedale, IN 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
line circuits 1
Southern Pacific Washes Insulators   1.5 MB
Logansport, IN 1
11,000-Ft. Coded Track Circuits   13.6 MB
Luke, VA 1
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
Macksville, IL 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
manual block signaling 2
A Review of 1939 and a Glance Into 1940   1.6 MB
Train Order Signals   4.2 MB
Marquette, MN 1
New Automatic Block Signaling on the Milwaukee   6.3 MB
master transformer 1
Coded Track Control   2.5 MB
Michigan Central 2
New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
Train Order Signals   4.2 MB
Missouri Pacific 4
"Running" Passing Tracks   1.1 MB
Proceeding By a Head-Block Signal   1.9 MB
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
Single-Track Signaling   2.5 MB
Mock, J. C. 1
Personal: Changes on the New York Central   2.2 MB
Model 15 AC relays 1
Plug Couplers for Relays and Signals   1.3 MB
Model 2A semaphore 1
Controller Adjuster   1.3 MB
Monona, MN 1
New Automatic Block Signaling on the Milwaukee   6.3 MB
Nachod Signal 1
Make-Up-Time Chart   813.1 KB
New York Central 1
Personal: Changes on the New York Central   2.2 MB
New York, Chicago & St. Louis 1
Trap Circuit   872.0 KB
New York, NY 2
Interlocking on the Hudson & Manhattan   6.8 MB
Signal Lens Cleaner   1.1 MB
New York, Ontario & Western 2
CTC on the New York, Ontario & Western   8.2 MB
Single-Track Signaling   2.5 MB
Norfolk & Western 3
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
Coded Signaling Control System on the Norfolk & Western   10.0 MB
Intermediate Signal Spacing and Control   2.1 MB
Norfolk, VA 1
Coded Signaling Control System on the Norfolk & Western   10.0 MB
Northern Pacific 1
D.C. Test Set For Relays, Slots   3.7 MB
NX interlocking 2
New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
Oakland, CA 2
Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
Southern Pacific Washes Insulators   1.5 MB
obituary 1
Obituary: Leroy Wyant   1.0 MB
overlap control 1
Southern Pacific Petition Denied   3.0 MB
passing sidings 1
"Running" Passing Tracks   1.1 MB
pendulum type code transmitters 1
Plug Couplers for Relays and Signals   1.3 MB
Pennsylvania 5
11,000-Ft. Coded Track Circuits   13.6 MB
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Pennsylvania Testing Procedure   16.6 MB
Pennsylvania Testing Procedure (Part II)   8.6 MB
Pennsylvania Testing Procedure (Part III)   8.9 MB
personal 2
Obituary: Leroy Wyant   1.0 MB
Personal: Changes on the New York Central   2.2 MB
Petersburg, VA 1
Coded Signaling Control System on the Norfolk & Western   10.0 MB
plug coupler 1
Plug Couplers for Relays and Signals   1.3 MB
position light signals 1
Coded Signaling Control System on the Norfolk & Western   10.0 MB
relays 2
D.C. Test Set For Relays, Slots   3.7 MB
Effecting Time Delay for Relays   933.3 KB
remote control 1
Remote Control On the Southern   3.8 MB
route interlocking 1
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
Rules, Standards and Instructions 1
A Change in the Requisites, Definitions and Regulations   1.2 MB
San Francisco, CA 1
Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
San Francisco-Oakland Bay Bridge 1
Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
scheduling 1
Make-Up-Time Chart   813.1 KB
searchlight signals 2
New Searchlight Signal   2.7 MB
New Signaling on the Wabash   8.1 MB
semaphore controller 1
Controller Adjuster   1.3 MB
semaphore signals 1
New Searchlight Signal   2.7 MB
signal indications 1
Single-Track Signaling   2.5 MB
Signal Section 1
A Change in the Requisites, Definitions and Regulations   1.2 MB
signal testing 3
Pennsylvania Testing Procedure   16.6 MB
Pennsylvania Testing Procedure (Part II)   8.6 MB
Pennsylvania Testing Procedure (Part III)   8.9 MB
SLV-13 AC relays 1
Plug Couplers for Relays and Signals   1.3 MB
Southern 2
Intermediate Signal Spacing and Control   2.1 MB
Remote Control On the Southern   3.8 MB
Southern Pacific 2
Southern Pacific Petition Denied   3.0 MB
Southern Pacific Washes Insulators   1.5 MB
spring switches 2
Facing Point Lock for Spring Switches   1.2 MB
Facing Point Locks On Main Line Switches   2.6 MB
St. Louis, MO 3
Fire Destroys Tower of Large Interlocking at St. Louis   2.0 MB
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
St. Louis Terminal   403.1 KB
St. Louis-San Francisco 1
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
Stoltz, C. F. 1
Personal: Changes on the New York Central   2.2 MB
switch circuit controllers 1
Facing Point Locks On Main Line Switches   2.6 MB
switches 1
Testing Switches   1.1 MB
Terminal Railroad Association of St. Louis 2
Fire Destroys Tower of Large Interlocking at St. Louis   2.0 MB
St. Louis Terminal   403.1 KB
Terre Haute, IN 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
testing 4
D.C. Test Set For Relays, Slots   3.7 MB
Hook-On Volt-Ammeter   1.3 MB
Testing Insulated Joints   2.1 MB
Testing Switches   1.1 MB
testing circuits 1
Shunting Straps for Testing   890.4 KB
timekeeping 1
Make-Up-Time Chart   813.1 KB
timing 1
Effecting Time Delay for Relays   933.3 KB
Tower Grove, MO 1
Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
track circuits 1
Testing Insulated Joints   2.1 MB
train order signals 1
Train Order Signals   4.2 MB
train stops 1
Interlocking on the Hudson & Manhattan   6.8 MB
trap circuits 1
Trap Circuit   872.0 KB
two-position signaling 1
Southern Pacific Petition Denied   3.0 MB
Type SC signals 1
New Searchlight Signal   2.7 MB
Union Switch & Signal 7
CTC on the New York, Ontario & Western   8.2 MB
Interlocking on the Hudson & Manhattan   6.8 MB
New Automatic Block Signaling on the Milwaukee   6.3 MB
New Code Transmitter   2.1 MB
New Signaling on the Wabash   8.1 MB
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Plug Couplers for Relays and Signals   1.3 MB
Wabash 5
Gates, Signals and Traffic Lights at a Wabash Crossing   6.8 MB
Interlockings Installed at Two Crossings   6.5 MB
New Signaling on the Wabash   8.1 MB
Single-Track Signaling   2.5 MB
Wabash Installs Gate and Signal Protection for All Crossings in Lafayette   4.9 MB
Weller Yard, VA 1
Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
West Casey, IL 1
Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line   13.1 MB
Wiegand, F. B. 1
Personal: Changes on the New York Central   2.2 MB
Windsor, Ontario 1
New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
Wyant, Leroy 1
Obituary: Leroy Wyant   1.0 MB

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