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.
1954 | CTC Improves Train Operation 3.3 MB |
---|
1935 | Collision on the T&P 2.0 MB |
---|
1950 | Personal: T. B. Thompson 1.1 MB |
---|
1947 | Drawbridge Interlocking on the Elgin, Joliet & Eastern 647.3 KB |
---|---|
1937 | New Devices- March 1937 18.1 MB |
1936 | T. George Stiles Rounds Out 60 Years of Signaling 2.5 MB |
1935 | Test Equipment for Highway Crossing Signals 1.1 MB |
1924 | Low-Voltage Interlocking on C&NW 1.6 MB |
---|
1962 | News Briefs. 1962-02 1.4 MB |
---|---|
1962 | News Briefs. 1962-05 823.4 KB |
1949 | Signaling Saves Time on Frisco 4.8 MB |
---|
1961 | News Briefs. 1961-04 1.5 MB |
---|
1962 | Hotbox Detectors Talk 2.0 MB |
---|
1918 | Maintaining an Interlocking Plant at High Tide 241.8 KB |
---|
1948 | CTC Big Help to GM&O 1.7 MB |
---|
1947 | Annual Review and Outlook 425.1 KB |
---|---|
1956 | Gates at 21 Crossings 6.6 MB |
1921 | Progress of Railroad Signaling in America 731.8 KB |
---|
1943 | Lap Order Results in an Accident 818.6 KB |
---|
1933 | Consolidated Interlockings 1.8 MB |
---|
1944 | Centennial of Morse Telegraph 6.6 MB |
---|---|
1962 | Centralization – Dispatch Circuits Are Changing 1.3 MB |
1956 | CN Telegraph Moves Into Its New Home 8.1 MB |
1944 | St. Louis-San Francisco Installs Centralized Traffic Control 1.1 MB |
1921 | The Development of the Printing Telegraph 4.8 MB |
1944 | Centennial of Morse Telegraph 6.6 MB |
---|---|
1944 | St. Louis-San Francisco Installs Centralized Traffic Control 1.1 MB |
1962 | Telephone Signaling Principles 1.6 MB |
---|
1949 | Raising Poles 1.9 MB |
---|
1950 | More Communications Needed With the 40-Hour Week 1.2 MB |
---|
1962 | Telephone Signaling Principles 1.6 MB |
---|
1936 | Interlocking and Remote Control on Erie 18.9 MB |
---|
1941 | Illinois Central Uses Automatic Telephone System on Chicago Terminal Area 5.8 MB |
---|---|
1950 | Telephones at Signals 1.1 MB |
1939 | Milwaukee Utilizes Teletype 1.6 MB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
---|---|
1922 | Signal Construction on the Santa Fe 797.6 KB |
1929 | D&RGW Expedites Trains With Centralized Control 2.1 MB |
---|
1957 | Consolidation Cuts Costs 3.1 MB |
---|---|
1961 | News Briefs. 1961-04 1.5 MB |
1941 | All-Relay Signal System Installed on Terminal Railroad of St. Louis 1.2 MB |
---|---|
1956 | Crossing Protection In Industrial Area 3.1 MB |
1950 | Crossing Protection With Indicators for Train Movements 4.5 MB |
1940 | Fire Destroys Tower of Large Interlocking at St. Louis 2.0 MB |
1943 | Fire-Proof Construction 11.6 MB |
1941 | Interlocking Restored to Service At St. Louis Union Station 3.6 MB |
1931 | New Interlocking for the St. Louis Municipal Bridge 2.9 MB |
1956 | NX Control Replaces Lever Machine 2.8 MB |
1931 | Sand Causes Signal Failure 614.1 KB |
1950 | Special Interlocking Controls 2.2 MB |
1939 | St. Louis Municipal Bridge Signaling 3.8 MB |
1940 | St. Louis Terminal 403.1 KB |
1950 | Train Signals for Highway Crossings 1.4 MB |
1939 | New Interlocking at Los Angeles 9.6 MB |
---|
1950 | Modern Communications In Yards and Terminals 1.4 MB |
---|
1944 | A Collision Despite Automatic Signals 2.7 MB |
---|---|
1929 | Big Four Improves Operation by Remote Control 2.5 MB |
1948 | CTC Keeps ‘em Rollin’ on C&EI 2.1 MB |
1952 | CTC Machine Hangs High But Trains Run 704.9 KB |
1940 | Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line 13.1 MB |
1941 | Protection at Hand-Thrown Switches in CTC Territory 1.6 MB |
1935 | Test Equipment for Highway Crossing Signals 1.1 MB |
---|
1939 | Testing Sets 2.0 MB |
---|
1935 | Checking Signal Lamps 3.3 MB |
---|---|
1940 | D.C. Test Set For Relays, Slots 3.7 MB |
1950 | DC Track Circuit Trouble 1.6 MB |
1940 | Hook-On Volt-Ammeter 1.3 MB |
1935 | New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB |
1956 | Signal Lamp Test 1.4 MB |
1956 | Signal Lamp Test 950.0 KB |
1935 | Test Equipment for Highway Crossing Signals 1.1 MB |
1936 | Testing Automatic Interlockings 3.5 MB |
1940 | Testing Insulated Joints 2.1 MB |
1936 | Testing New Interlocking 1.7 MB |
1936 | Testing New Interlocking 3.5 MB |
1940 | Testing Switches 1.1 MB |
1940 | Shunting Straps for Testing 890.4 KB |
---|
1944 | Track Circuits on Passing Tracks in CTC Territory 941.8 KB |
---|---|
1954 | Why Cotton Belt Installed CTC On 429 Miles of Single Track 4.0 MB |
1954 | CTC Improves Train Operation 3.3 MB |
---|---|
1933 | Graphic Recorders 843.3 KB |
1937 | Interlocking and Signaling For New Bridge at New Orleans 5.9 MB |
1936 | Maintainers' Blueprint Plans 4.2 MB |
1936 | New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans 7.9 MB |
1961 | News Briefs. 1961-10 1.0 MB |
1935 | Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB |
1936 | Reconstruction of Interlocking at the Dallas Union Terminal 14.8 MB |
1961 | Should Sidings Have Circuits? 347.6 KB |
1935 | Switch-Stand Selector 1.9 MB |
1935 | Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB |
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
---|
1922 | Signal Construction on the Santa Fe 797.6 KB |
---|
1944 | Track Circuits on Passing Tracks in CTC Territory 941.8 KB |
---|
1929 | Frisco Installs Semaphores with Color-Light Indication 665.1 KB |
---|
1954 | CTC Increases Capacity of Double Track 4.2 MB |
---|
1962 | Automatic Dispatching 2.1 MB |
---|---|
1962 | SP Has 500 Miles of Automatic CTC 363.6 KB |
1934 | Re-Signaling the London North Eastern of England 3.0 MB |
---|
1953 | News 2.2 MB |
---|
1938 | Interlocking Changes on the Pennsylvania 4.9 MB |
---|---|
1938 | Pennsylvania Electrification Signaling 5.3 MB |
1916 | New Automatic Signals on Grand Trunk 991.7 KB |
---|
1917 | Light Signals On CM&StP 781.9 KB |
---|
1932 | An Early Automatic Interlocking 411.4 KB |
---|
1941 | Automatics Installed on the Wabash 4.0 MB |
---|
1936 | Accuracy of Timing Relays 2.2 MB |
---|---|
1949 | Controlled Overlaps for Single-Track APB Signaling 1.5 MB |
1939 | DC Time Element Relay 1.9 MB |
1950 | Approach Distances and Times 5.5 MB |
---|---|
1943 | Approach or Time Locking 897.5 KB |
1956 | CTC Locking 2.2 MB |
1943 | Norfolk & Western Installs CTC on 14 Miles of Single Track 4.4 MB |
1961 | What’s the Answer? 1961-04 960.3 KB |
1950 | Approach Distances and Times 5.5 MB |
---|
1940 | Make-Up-Time Chart 813.1 KB |
---|
1961 | News Briefs. 1961-11 1.3 MB |
---|
1962 | 1962 outlook 3.0 MB |
---|
1962 | News Briefs. 1962-10 447.9 KB |
---|
1940 | Effecting Time Delay for Relays 933.3 KB |
---|
1962 | Electronic Track Circuits 740.3 KB |
---|
1933 | Economics of Modern Signaling 2.1 MB |
---|---|
1920 | Electric Interlocking at Bellefontaine, Ohio 3.8 MB |
1927 | NYC First to Install Complete Train Dispatching System 8.0 MB |
1925 | Traffic Reversal on Double Track by Signal Indication 1.5 MB |
1937 | New Automatics on the C&O 5.0 MB |
---|---|
1957 | Pushbutton CTC Machine on NYC Is First of Its Kind 3.3 MB |
1956 | Remote Control Converted to CTC 6.6 MB |
1938 | Signaling for Higher Train Speeds 3.9 MB |
1962 | Electric Switch Lamp Lighting Helps Reduce Operating Expense 648.9 KB |
---|---|
1962 | News Briefs. 1962-10 447.9 KB |
1941 | Automatics Installed on the Wabash 4.0 MB |
---|---|
1942 | Wabash Installs Automatics 5.8 MB |
1928 | Changes on the C&NW 978.4 KB |
---|
1935 | Maintainers' Tool Houses 2.2 MB |
---|---|
1935 | Maintainers' Tool Houses 3.5 MB |
1935 | Maintainers' Tool Houses 1.1 MB |
1936 | 34 Train Stops Eliminated Daily by an Interlocking 10.4 MB |
---|---|
1941 | Carrier Communication Equipment Installed on the Santa Fe 4.7 MB |
1962 | News Briefs. 1962-01 972.3 KB |
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1935 | Circuits for Crossing Signals 1.5 MB |
---|---|
1937 | False Clear Failures 2.0 MB |
1931 | Interlocking System Installed at Toronto Union Station 4.6 MB |
1937 | Signals in Advance of Switches 1.1 MB |
1935 | Trap Circuits at Railroad Crossings 4.6 MB |
1961 | News Briefs. 1961-01 748.5 KB |
---|
1962 | Toronto Railway Conference – Automatic Train Operation 457.7 KB |
---|
1962 | Computer Simulation of CTC 220.3 KB |
---|---|
1931 | Interlocking System Installed at Toronto Union Station 4.6 MB |
1962 | News Briefs. 1962-06 971.1 KB |
1962 | News Briefs. 1962-07 499.4 KB |
1953 | One Control Machine for Interlocked Yard Area 4.2 MB |
1962 | Toronto Railway Conference – Automatic Train Operation 457.7 KB |
1950 | New Developments 16.9 MB |
---|
1937 | Flag and Torpedo Containers 903.1 KB |
---|---|
1919 | Legal Decisions on the Use of Torpedoes for Signaling Purposes 355.6 KB |
1921 | Fire Threatened Tie Up At Grand Central Terminal 1.5 MB |
---|
1958 | CTC Handles 15 More Trains 2.2 MB |
---|
1958 | CTC Handles 15 More Trains 2.2 MB |
---|
1958 | CTC Handles 15 More Trains 2.2 MB |
---|
1958 | CTC Handles 15 More Trains 2.2 MB |
---|
1940 | Route Type Interlocking at Tower Grove in St. Louis 11.1 MB |
---|
1931 | Three-Track Signaling on 13.5 Miles of the C&NW 5.4 MB |
---|
1937 | New Devices- March 1937 18.1 MB |
---|
1937 | Track Occupancy Indications in CTC Territory 2.7 MB |
---|
1939 | Track Relay Release Time 1.6 MB |
---|
1962 | News Briefs. 1962-11 466.0 KB |
---|---|
1926 | Train Control Progress in 1925 3.1 MB |
1962 | News Briefs. 1962-11 466.0 KB |
---|
1962 | News Briefs. 1962-07 499.4 KB |
---|
1950 | New Rules, Standards and Instructions Issued by the Interstate Commerce Commission 7.9 MB |
---|---|
1962 | News Briefs. 1962-02 1.4 MB |
1962 | News Briefs. 1962-04 1.2 MB |
1962 | News Briefs. 1962-05 823.4 KB |
1962 | News Briefs. 1962-06 971.1 KB |
1962 | News Briefs. 1962-08 680.0 KB |
1962 | News Briefs. 1962-09 826.7 KB |
1962 | News Briefs. 1962-10 447.9 KB |
1962 | News Briefs. 1962-11 466.0 KB |
1950 | Rules, Standards and Instructions 1.5 MB |
1962 | News Briefs. 1962-09 826.7 KB |
---|
1921 | A New Idea in Traffic Locking On the C&O 1.7 MB |
---|---|
1950 | CTC on the Reading 6.6 MB |
1950 | Two Single Tracks, Side By Side 1.4 MB |
1962 | Computer Simulation of CTC 220.3 KB |
---|
1950 | Continuity of Train Communication 2.6 MB |
---|---|
1962 | Toronto Railway Conference – Automatic Train Operation 457.7 KB |
1961 | ICC Reports on Railroad Safety 184.6 KB |
---|
1923 | News of the Month (July 1923) 1.9 MB |
---|---|
1923 | News of the Month (November 1923) 1.8 MB |
1923 | News of the Month (October 1923) 1.9 MB |
1921 | A Complete Train Despatching System 1.7 MB |
---|---|
1950 | Centralized Train Dispatching 1.4 MB |
1911 | Train Dispatching on Interurban Railways 2.0 MB |
1954 | Junction Controlled Automatically 2.5 MB |
---|---|
1961 | News Briefs. 1961-09 876.9 KB |
1949 | Train Indicator for Motor Car 1.0 MB |
---|
1950 | Illuminated Train Order Fork 1.1 MB |
---|
1937 | New Devices- March 1937 18.1 MB |
---|
1935 | Collision on the Erie 2.2 MB |
---|
1946 | The User of Signaling 894.7 KB |
---|
1937 | Approach Indications to Train Order Signals 4.2 MB |
---|---|
1950 | Flashing Signal Aspects 1.1 MB |
1939 | Light Signals as Train-Order Signals 918.5 KB |
1937 | Should Train Order Signals Control Automatic Signals 1.2 MB |
1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
1940 | Train Order Signals 4.2 MB |
1954 | CTC into Service 2.5 MB |
---|---|
1925 | Eliminating the Written Train Order 2.8 MB |
1946 | ICC 50-MPH Signal Hearing 6.9 MB |
1950 | Illuminated Train Order Fork 1.1 MB |
1925 | Signaling at the Age of Maturity 2.0 MB |
1937 | Special Locking Release 2.4 MB |
1939 | Speeding Up Train Operation With Signaling 4.5 MB |
1923 | Superintendents Discuss Form "19" 2.0 MB |
1920 | The Use of Signals for Better Train Operation (Part 1 of 2) 5.7 MB |
1920 | The Use of Signals for Better Train Operation (Part 2 of 2) 7.3 MB |
1911 | Train Dispatching on Interurban Railways 2.0 MB |
1954 | Train Operations When CTC Fails 2.0 MB |
1950 | Increase In Train Communication Systems 2.4 MB |
---|---|
1950 | Modern Communications In Yards and Terminals 1.4 MB |
1920 | A Train Sign Used As an Indicator 267.5 KB |
---|
1937 | Report of Committee X – Signaling Practice 2.9 MB |
---|
1922 | A Rolling Pin as a Positive Staff 503.7 KB |
---|
1944 | Train Telephone Communication 4.1 MB |
---|
1937 | Rocket Train Telephones 5.7 MB |
---|---|
1937 | Zephyr Train Telephones 2.3 MB |
1961 | What’s the Answer? 1961-04 960.3 KB |
---|
1921 | Educational Meetings On the Illinois Central 616.5 KB |
---|---|
1956 | Training Program 2.1 MB |
1950 | New Developments 16.9 MB |
---|---|
1935 | New Devices 1.5 MB |
1949 | The Transistor 3.1 MB |
---|
1962 | 1962 outlook 3.0 MB |
---|
1950 | Bootleg Risers and Bonds 2.1 MB |
---|---|
1940 | Trap Circuit 872.0 KB |
1935 | Trap Circuits at Railroad Crossings 4.6 MB |
1932 | CRI&P Extends Centralized Control 2.6 MB |
---|---|
1945 | The New Connections at Kansas City For Milwaukee and Rock Island 4.7 MB |
1946 | Carryphone on the Pennsylvania 1.5 MB |
---|---|
1937 | New Signaling on Pennsylvania 1.0 MB |
1931 | Signaling for Electrified Operation 3.5 MB |
1933 | Signaling on the Pennsylvania's Electrified Line 3.6 MB |
1915 | Trenton Electro-Mechanical Interlocking 1.7 MB |
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
---|
1950 | Personnel changes on the IC 1.4 MB |
---|
1931 | Economy of Smaller Towers 539.7 KB |
---|
1929 | B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB |
---|---|
1947 | Hoosac Tunnel Interlocking and CTC 1.7 MB |
1911 | The Staff System on the Southern Pacific 4.0 MB |
---|
1954 | SP Modernizes Automatic Block 2.0 MB |
---|
1962 | SP Has 500 Miles of Automatic CTC 363.6 KB |
---|
1938 | Adapting Signaling to Requirements 1.7 MB |
---|
1929 | Frisco Installs Semaphores with Color-Light Indication 665.1 KB |
---|---|
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
1939 | Track Turnouts and Signal Aspects 1.8 MB |
---|
1944 | CTC Speeds Ore Traffic On the DM&IR 4.6 MB |
---|---|
1962 | DM&IR Consolidates CTC Control Miles 384.7 KB |
1940 | Southern Pacific Petition Denied 3.0 MB |
---|
1935 | New Signaling on the Route of the C&NW "400" 9.6 MB |
---|
1925 | Color-Light Signals on C&NW 6.9 MB |
---|---|
1935 | New Signaling on the Route of the C&NW "400" 9.6 MB |
1931 | Three-Track Signaling on 13.5 Miles of the C&NW 5.4 MB |
1937 | New Devices- March 1937 18.1 MB |
---|
1935 | New Signaling on the Route of the C&NW "400" 9.6 MB |
---|
1940 | New Searchlight Signal 2.7 MB |
---|
1926 | Directing Trains By Signals 1.9 MB |
---|
1947 | CTC Saves Train Time on the Pennsylvania 1.5 MB |
---|