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.
1961 | Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB |
---|
1936 | Train Control on the B&O Diesel 2.6 MB |
---|
1954 | Automatic Gates Increase Safety 3.2 MB |
---|
1938 | CTC on the Missouri Pacific 5.3 MB |
---|
1954 | CTC Increases Capacity of Double Track 4.2 MB |
---|
1947 | 107 Miles of CTC on the N&W 2.3 MB |
---|---|
1961 | News Briefs. 1961-04 1.5 MB |
1943 | Norfolk & Western Installs CTC on 14 Miles of Single Track 4.4 MB |
1962 | 1962 outlook 3.0 MB |
---|---|
1946 | Carryphone on the Pennsylvania 1.5 MB |
1962 | EJ&E Uses Tone Coding to Get Systems on One RF Channel 562.3 KB |
1950 | Increasing Use of Carrier 1.3 MB |
1954 | Loudspeakers and Interlocking Improve Yard Operation 4.7 MB |
1956 | Train Operations When CTC Fails 3.5 MB |
1956 | Train Operations When CTC Fails 2.4 MB |
1949 | Two-Way Radio Speeds Busy Terminal Operation 3.0 MB |
1956 | Walkie-Talkies 1.5 MB |
1937 | Railway Signaling by Wireless 1.6 MB |
---|
1962 | Hotbox Detectors Talk 2.0 MB |
---|
1950 | New Rail-Web Bond 1.3 MB |
---|---|
1939 | Recent Developments In Rail Bonding 3.7 MB |
1935 | Checking Rail Ends on Drawbridges 2.5 MB |
---|
1962 | Identifying Emblems 326.9 KB |
---|
1949 | New Space Radio Relay System Adopted by South Shore 4.2 MB |
---|---|
1944 | Railroad Applications of Electronics 1.9 MB |
1949 | A Century of Signal Glass Developments 4.2 MB |
---|---|
1943 | Herbert S. Balliet obituary 609.4 KB |
1935 | Letter to the Editor- Comment on Multiple Aspects 1.5 MB |
1911 | Railway Signal Association Convention: Committee I: Signaling Practice 3.8 MB |
1962 | DM&IR Consolidates CTC Control Miles 384.7 KB |
---|
1938 | CTC Replaces Staff System on the Milwaukee 2.3 MB |
---|
1950 | L&N Extends CTC on "EK" 10.4 MB |
---|
1947 | Remote Control on Baltimore & Ohio 595.8 KB |
---|
1954 | Automatic Gates Increase Safety 3.2 MB |
---|
1944 | Light-Type Signals Installed on the Reading 6.3 MB |
---|
1935 | New Devices 1.5 MB |
---|---|
1937 | Rectifiers in Flood Waters 972.4 KB |
1935 | Purple Signal Glasses 3.3 MB |
---|
1935 | Purple Signal Glasses 3.3 MB |
---|
1937 | Signal Construction on the Wabash 12.2 MB |
---|
1944 | Railroad Applications of Electronics 1.9 MB |
---|
1946 | ICC 50-MPH Signal Hearing 6.9 MB |
---|
1935 | An Under-Voltage Relay 1.2 MB |
---|---|
1941 | Code-Following Polar Track Circuit Relay 1.4 MB |
1935 | Ground Detector Relay for Instantaneous and Automatic Detection 2.3 MB |
1936 | Light-out Relay for AC or DC 2.3 MB |
1941 | P4 Code-Following Relay 1.1 MB |
1936 | Power-Transfer Relay for Crossing Signals 3.5 MB |
1939 | 230 Routes In a Relay Interlocking 2.3 MB |
---|---|
1944 | Canadian National installs new type of all-relay interlocking at Montreal 7.0 MB |
1957 | Consolidation Cuts Costs 3.1 MB |
1954 | IC Combines Interlockings 1.5 MB |
1955 | Interlocking Expedites Terminal Moves 1.6 MB |
1954 | Loudspeakers and Interlocking Improve Yard Operation 4.7 MB |
1954 | New Interlocking on Leads to Docks Saves Time for Ore Trains 2.9 MB |
1954 | New Orleans Passenger Terminal 4.7 MB |
1954 | NYC Combines Interlockings 2.4 MB |
1957 | Relay Interlocking Saves Time at Yard Entrances 2.5 MB |
1955 | Remote Control Eliminates Train Stops 1.3 MB |
1952 | Train Time Saved By New Interlocking and Automatic Protection at 15 Street Crossings in Lima, Ohio 4.4 MB |
1950 | New Developments 16.9 MB |
---|
1935 | Advantages of Modern Relays 4.0 MB |
---|---|
1928 | Circuit Polarity at Relay Contacts 526.2 KB |
1935 | Circuits for Crossing Signals 1.5 MB |
1939 | Contact Pitting 1.6 MB |
1940 | D.C. Test Set For Relays, Slots 3.7 MB |
1940 | Effecting Time Delay for Relays 933.3 KB |
1936 | Flashing Light Signal Failures 2.6 MB |
1956 | Interlocking Relays 3.9 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 |
1936 | Relay Shipment Container 2.0 MB |
1937 | Shunt Sensitivity and Broken Rail Protection 4.3 MB |
1937 | Track Shunting Problems 2.5 MB |
1937 | APB, Remote Control, and CTC on the Baltimore & Ohio 11.9 MB |
---|---|
1936 | C&O Remote Control 12.8 MB |
1936 | Demands for Modern Signaling 12.1 MB |
1950 | Double to Single Track with Remote Control 4.2 MB |
1936 | Interlocking and Remote Control on Erie 18.9 MB |
1935 | Obsolescence in Signaling 3.4 MB |
1937 | Pennsylvania CTC Installation 7.0 MB |
1935 | Power-Off Lights at CTC Machines 2.1 MB |
1937 | Remote Control By Code 7.0 MB |
1956 | Remote Control Converted to CTC 6.6 MB |
1941 | Remote Control Installation 2.4 MB |
1944 | Remote Control Interlocking on the D&RGW 4.3 MB |
1936 | Remote Control on the Pennsylvania 14.5 MB |
1937 | Remote Control on the Pennsylvania 5.2 MB |
1935 | Remote Control on the Seaboard 5.4 MB |
1940 | Remote Control On the Southern 3.8 MB |
1944 | Remote Control Project Saves Train Time on the Baltimore & Ohio 3.5 MB |
1931 | What Can Be Done Now? 736.8 KB |
1947 | Annual Review and Outlook 425.1 KB |
---|---|
1962 | News Briefs. 1962-02 1.4 MB |
1962 | News Briefs. 1962-10 447.9 KB |
1962 | Remote Control Interlocking Has Time Division Multiplex System 855.3 KB |
1947 | Remote Control on Baltimore & Ohio 595.8 KB |
1956 | No Waiting for Reservations 6.3 MB |
---|
1935 | Avoiding Light-Out Signal Failures 2.2 MB |
---|---|
1935 | Avoiding Light-Out Signal Failures 1.2 MB |
1925 | Color-Light Signals on C&NW 6.9 MB |
1931 | Three-Track Signaling on 13.5 Miles of the C&NW 5.4 MB |
1961 | Should Sidings Have Circuits? 347.6 KB |
---|---|
1944 | Track Circuits on Passing Tracks in CTC Territory 941.8 KB |
1950 | Retained-Neutral Neutral Relay 3.4 MB |
---|
1950 | Retained-Neutral Neutral Relay 3.4 MB |
---|
1962 | 1962 outlook 3.0 MB |
---|
1950 | IC Rebuilds Classification Yard 6.9 MB |
---|
1949 | 40-Hour Week Means More Signaling 1.1 MB |
---|
1913 | Flash Lights on the P&R 915.4 KB |
---|
1950 | Neon Lighting For Crossing Gate Arms 3.1 MB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
---|
1928 | Signal and Train Control Hearing Ends 2.0 MB |
---|---|
1961 | Survey Tells How Railroads Use Hotbox Detectors 1.8 MB |
1947 | Annual Review and Outlook 425.1 KB |
---|---|
1924 | Three Train Control Contracts Let 1.9 MB |
1927 | Signaling of IC Chicago Terminal 6.4 MB |
---|
1911 | Automatic Signals on Vermillion River Bridge 986.3 KB |
---|
1922 | Signal Construction on the Santa Fe 797.6 KB |
---|
1911 | Signaling on the Illinois Traction System 1.5 MB |
---|
1937 | Alton Uses Spring Switches on Ends of Double Track 5.0 MB |
---|---|
1961 | News Briefs. 1961-05 1.1 MB |
1962 | News Briefs. 1962-10 447.9 KB |
---|
1947 | All-Relay Interlocking Replaces Mechanical Plant 1.5 MB |
---|---|
1950 | Neon Lighting For Crossing Gate Arms 3.1 MB |
1936 | Replacing Semaphores With Position Light Signals On the Norfolk & Western 7.9 MB |
1926 | Signal Business Is Good Especially For Single Track 382.3 KB |
1926 | Train Control Progress in 1925 3.1 MB |
1932 | Automatic Interlocking Replaces Mechanical Plant 1.7 MB |
---|
1927 | Color Light Automatic Block Signals Installed on the New York Central 3.6 MB |
---|---|
1954 | General Railway Signal Company Enters Fiftieth Year 1.6 MB |
1949 | Signal Research and Development 2.9 MB |
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
---|
1949 | 625 Miles of CTC in one Stretch 7.9 MB |
---|---|
1939 | Rock Detector Protection on the Western Pacific 2.1 MB |
1936 | Slide Detector Signals 12.9 MB |
1939 | Special Aspects for Detectors 937.0 KB |
1934 | Automatic Crossing Gates on Illinois Central 2.7 MB |
---|---|
1937 | Burlington Protects Three Crossings 6.9 MB |
1929 | Crossing Protection Installed Extensively on the Milwaukee 1.3 MB |
1962 | News Briefs. 1962-09 826.7 KB |
---|
1934 | CTC Replaces Staff on Milwaukee 2.0 MB |
---|
1947 | Annual Review and Outlook 425.1 KB |
---|---|
1961 | News Briefs. 1961-12 964.3 KB |
1962 | News Briefs. 1962-05 823.4 KB |
1962 | News Briefs. 1962-06 971.1 KB |
1924 | Three Train Control Contracts Let 1.9 MB |
1962 | Toronto Railway Conference – Automatic Train Operation 457.7 KB |
---|
1961 | News Briefs. 1961-11 1.3 MB |
---|
1947 | Signaling and Interlocking in Italy 684.8 KB |
---|
1962 | News Briefs. 1962-06 971.1 KB |
---|
1930 | Color-light Automatic Block Signals and Automatic Interlocking 2.4 MB |
---|---|
1938 | EJ&E Installs APB Signaling 3.1 MB |
1949 | Milwaukee Installs Automatic Block 8.2 MB |
1935 | Signaling for Higher Train Speeds 3.0 MB |
1951 | P&WV Signals Entire Main Line 3.9 MB |
---|
1954 | CTC Improves Train Operation 3.3 MB |
---|
1961 | Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB |
---|
1943 | Crossing Protection on Milwaukee 5.7 MB |
---|---|
1927 | Rotating Stop Signal for Highway Grade Crossings 1.0 MB |
1937 | The Rotating Stop Sign 1.1 MB |
1947 | Hoosac Tunnel Interlocking and CTC 1.7 MB |
---|
1962 | News Briefs. 1962-03 1.1 MB |
---|---|
1962 | News Briefs. 1962-06 971.1 KB |
1944 | Automatic Signaling, Train Stop, and Route Interlocking Installed in the Chicago Subways 8.6 MB |
---|---|
1952 | Chicago's Newest Subway Has Automatic Block Signaling and Train Stop 1.1 MB |
1947 | Large All-Relay Interlocking on the New York Central 2.5 MB |
1937 | New York Central Installs First Button-Control Route Interlocking 9.0 MB |
1949 | New York Central Installs Interlocking 3.3 MB |
1961 | News Briefs. 1961-01 748.5 KB |
1956 | NX Control Replaces Lever Machine 2.8 MB |
1936 | NX Electric Interlocking 3.8 MB |
1937 | Route Control Interlocking – A New Signaling Development 2.9 MB |
1940 | Route Type Interlocking at Tower Grove in St. Louis 11.1 MB |
1950 | Route Type Interlocking on New York Subway 8.7 MB |
1962 | News Briefs. 1962-02 1.4 MB |
---|---|
1962 | News Briefs. 1962-05 823.4 KB |
1953 | Route Lever Interlocking on Rock Island 6.5 MB |
1919 | Electric Interlocking at Charlottesville,VA 530.2 KB |
---|---|
1913 | Illinois Central Alternating Current Signaling 2.5 MB |
1937 | Route Locking Circuits 1.9 MB |
1911 | Summary of Recent Progress in Signaling 4.4 MB |
1944 | Rio Grande has Longest CTC 9.2 MB |
---|
1952 | CTC Pays Its Way on B&O 733.2 KB |
---|
1950 | Signaling and Rules 1.4 MB |
---|
1962 | ICC Proposes RS&I Changes 310.7 KB |
---|
1940 | A Change in the Requisites, Definitions and Regulations 1.2 MB |
---|---|
1939 | ICC Issues Rules, Standards and Instructions for Signaling 10.3 MB |
1950 | New Rules, Standards and Instructions Issued by the Interstate Commerce Commission 7.9 MB |
1950 | Rules, Standards and Instructions 1.5 MB |
1950 | Telephones at Signals 1.1 MB |
1950 | Neon Lighting For Crossing Gate Arms 3.1 MB |
---|
1930 | Illinois Central Installs Color Light Signals on 80 Miles 1.6 MB |
---|---|
1947 | Railroads Request Relief from the ICC Signal Order 483.5 KB |
1935 | Safety of High Speed Trains 5.2 MB |
---|
1933 | Modern Signaling in Soviet Russia 3.3 MB |
---|
1941 | Automatics Installed on the Wabash 4.0 MB |
---|
1915 | Extension of New Haven signals 684.8 KB |
---|---|
1956 | Train Runs by Wayside Control 3.3 MB |