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.
1949 | New Interlocking in Louisville 5.3 MB |
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1949 | Fast Work Laying Submarine Cable 3.1 MB |
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1949 | 40-Hour Week Means More Signaling 1.1 MB |
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1949 | Special Controls for Crossing Protection 971.5 KB |
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1949 | Signaling Saves Time on Frisco 4.8 MB |
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1949 | Entrance-Exit Interlocking Installed on Missouri Pacific 3.0 MB |
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1949 | New Interlocking at Chattanooga Terminal 5.2 MB |
1949 | New Interlocking in Louisville 5.3 MB |
1949 | New York Central Installs Interlocking 3.3 MB |
1949 | Texas & Pacific New All-Relay Interlocking 4.3 MB |
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | Coast Line Replaces Signaling On Engine District 8.1 MB |
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1949 | Main Line Crossovers 2.4 MB |
1949 | Controlled Overlaps for Single-Track APB Signaling 1.5 MB |
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1949 | CTC Increases Capacity of Single-Track Freight Line Handling Heavy Traffic 6.1 MB |
1949 | ICC Issues Statistics 850.7 KB |
1949 | Milwaukee Installs Automatic Block 8.2 MB |
1949 | New Automatic Block on the Katy 4.7 MB |
1949 | Signaling and Interlocking On New Line of New York Subways 6.5 MB |
1949 | Train Indicator for Motor Car 1.0 MB |
1949 | Train Operation By Signal Inidication Used Extensively on the Nickel Plate 6.1 MB |
1949 | 192 Miles of Automatic Block On Soo Line 6.0 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1949 | An Unusual Automatic Plant 4.5 MB |
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1949 | ICC Issues Statistics 850.7 KB |
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1949 | Santa Fe Gets Some Relief from ICC Signaling Order 2.2 MB |
1949 | ICC Issues Statistics 850.7 KB |
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1949 | Santa Fe Gets Some Relief from ICC Signaling Order 2.2 MB |
1949 | Varied Light Intensity 921.0 KB |
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1949 | The Transistor 3.1 MB |
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1949 | New Automatic Block on the Katy 4.7 MB |
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1949 | New Automatic Block on the Katy 4.7 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | Insulation of Rails 874.8 KB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | ICC Issues Statistics 850.7 KB |
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1949 | Santa Fe Gets Some Relief from ICC Signaling Order 2.2 MB |
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | 625 Miles of CTC in one Stretch 7.9 MB |
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1949 | A Mile-Stone In Signaling 1.2 MB |
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1949 | A Mile-Stone In Signaling 1.2 MB |
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1949 | 625 Miles of CTC in one Stretch 7.9 MB |
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1949 | 40-Hour Week Means More Signaling 1.1 MB |
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1949 | 625 Miles of CTC in one Stretch 7.9 MB |
1949 | An Unusual Automatic Plant 4.5 MB |
1949 | Coast Line Replaces Signaling On Engine District 8.1 MB |
1949 | CTC Increases Capacity of Single-Track Freight Line Handling Heavy Traffic 6.1 MB |
1949 | Either-Direction Running on Two Tracks on the Norfolk & Western 5.5 MB |
1949 | Hold-Out Signals in CTC 1.0 MB |
1949 | Modern Signaling on a Division 6.6 MB |
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1949 | Signaling Saves Time on Frisco 4.8 MB |
1949 | Train Indicator for Motor Car 1.0 MB |
1949 | Train Operation By Signal Inidication Used Extensively on the Nickel Plate 6.1 MB |
1949 | New Interlocking at Chattanooga Terminal 5.2 MB |
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1949 | New Interlocking at Chattanooga Terminal 5.2 MB |
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1949 | CTC Increases Capacity of Single-Track Freight Line Handling Heavy Traffic 6.1 MB |
---|---|
1949 | Hold-Out Signals in CTC 1.0 MB |
1949 | Main Line Crossovers 2.4 MB |
1949 | Modern Signaling on a Division 6.6 MB |
1949 | Insulation of Rails 874.8 KB |
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1949 | A Century of Signal Glass Developments 4.2 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | Milwaukee Installs Automatic Block 8.2 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|---|
1949 | Train Indicator for Motor Car 1.0 MB |
1949 | Coast Line Replaces Signaling On Engine District 8.1 MB |
---|---|
1949 | Coded Track Circuits 1.1 MB |
1949 | Milwaukee Installs Automatic Block 8.2 MB |
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1949 | A Century of Signal Glass Developments 4.2 MB |
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1949 | Communications Trouble 2.0 MB |
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1949 | A Century of Signal Glass Developments 4.2 MB |
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1949 | New York Central Installs Interlocking 3.3 MB |
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1949 | Crossing Protection 1.1 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | New Automatic Block on the Katy 4.7 MB |
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1949 | An Unusual Automatic Plant 4.5 MB |
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1949 | A Century of Signal Glass Developments 4.2 MB |
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1949 | Signaling Saves Time on Frisco 4.8 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | Loudspeakers on the "J" 7.9 MB |
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1949 | Fast Work Laying Submarine Cable 3.1 MB |
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1949 | Varied Light Intensity 921.0 KB |
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1949 | New Automatic Block on the Katy 4.7 MB |
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1949 | Milwaukee Installs Automatic Block 8.2 MB |
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1949 | A. A. Freiberger 827.1 KB |
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1949 | Entrance-Exit Interlocking Installed on Missouri Pacific 3.0 MB |
---|---|
1949 | Modern Signaling on a Division 6.6 MB |
1949 | New Interlocking at Chattanooga Terminal 5.2 MB |
1949 | New Interlocking in Louisville 5.3 MB |
1949 | New York Central Installs Interlocking 3.3 MB |
1949 | Signal Research and Development 2.9 MB |
1949 | Texas & Pacific New All-Relay Interlocking 4.3 MB |
1949 | A Mile-Stone In Signaling 1.2 MB |
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1949 | Modern Signaling on a Division 6.6 MB |
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1949 | Yardsticks 2.0 MB |
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1949 | New Automatic Block on the Katy 4.7 MB |
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1949 | Fast Work Laying Submarine Cable 3.1 MB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
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1949 | 40-Hour Week Means More Signaling 1.1 MB |
---|---|
1949 | Crossing Protection 1.1 MB |
1949 | New Interlocking in Louisville 5.3 MB |
1949 | Protection at All Crossings In Battle Creek on the Grand Trunk Western 6.6 MB |
1949 | Special Controls for Crossing Protection 971.5 KB |
1949 | Hold-Out Signals in CTC 1.0 MB |
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1949 | New Interlocking in Louisville 5.3 MB |
1949 | A Mile-Stone In Signaling 1.2 MB |
---|---|
1949 | A. A. Freiberger 827.1 KB |
1949 | Controlled Overlaps for Single-Track APB Signaling 1.5 MB |
1949 | A Mile-Stone In Signaling 1.2 MB |
---|
1949 | Insulation of Rails 874.8 KB |
---|
1949 | Coast Line Replaces Signaling On Engine District 8.1 MB |
---|---|
1949 | Entrance-Exit Interlocking Installed on Missouri Pacific 3.0 MB |
1949 | ICC Issues Statistics 850.7 KB |
1949 | Modern Signaling on a Division 6.6 MB |
1949 | New Automatic Block on the Katy 4.7 MB |
1949 | New Interlocking at Chattanooga Terminal 5.2 MB |
1949 | New Interlocking in Louisville 5.3 MB |
1949 | New York Central Installs Interlocking 3.3 MB |
1949 | Signaling and Interlocking On New Line of New York Subways 6.5 MB |
1949 | Applications to ICC 1949-11 926.1 KB |
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1949 | ICC Issues Statistics 850.7 KB |
1949 | Santa Fe Gets Some Relief from ICC Signaling Order 2.2 MB |
1949 | Two-Way Radio Speeds Busy Terminal Operation 3.0 MB |
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1949 | Two-Way Radio Speeds Busy Terminal Operation 3.0 MB |
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1949 | Milwaukee Installs Automatic Block 8.2 MB |
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1949 | Fast Work Laying Submarine Cable 3.1 MB |
---|
1949 | Loudspeakers on the "J" 7.9 MB |
---|---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1949 | New Interlocking in Louisville 5.3 MB |
---|
1949 | Signal Research and Development 2.9 MB |
---|
1949 | Modern Signaling on a Division 6.6 MB |
---|
1949 | An Unusual Automatic Plant 4.5 MB |
---|
1949 | Texas & Pacific New All-Relay Interlocking 4.3 MB |
---|
1949 | New Interlocking in Louisville 5.3 MB |
---|
1949 | A Century of Signal Glass Developments 4.2 MB |
---|---|
1949 | Texas & Pacific New All-Relay Interlocking 4.3 MB |
1949 | A Mile-Stone In Signaling 1.2 MB |
---|
1949 | Varied Light Intensity 921.0 KB |
---|
1949 | An Unusual Automatic Plant 4.5 MB |
---|
1949 | 192 Miles of Automatic Block On Soo Line 6.0 MB |
---|
1949 | New Automatic Block on the Katy 4.7 MB |
---|
1949 | A Mile-Stone In Signaling 1.2 MB |
---|
1949 | Communications Trouble 2.0 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | 625 Miles of CTC in one Stretch 7.9 MB |
---|---|
1949 | New Automatic Block on the Katy 4.7 MB |
1949 | Signaling Saves Time on Frisco 4.8 MB |
1949 | Train Indicator for Motor Car 1.0 MB |
1949 | Fast Work Laying Submarine Cable 3.1 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | Main Line Crossovers 2.4 MB |
---|---|
1949 | New York Central Installs Interlocking 3.3 MB |
1949 | Raising Poles 1.9 MB |
1949 | Applications to ICC 1949-11 926.1 KB |
---|---|
1949 | Crossing Protection 1.1 MB |
1949 | Either-Direction Running on Two Tracks on the Norfolk & Western 5.5 MB |
1949 | Hold-Out Signals in CTC 1.0 MB |
1949 | Entrance-Exit Interlocking Installed on Missouri Pacific 3.0 MB |
---|---|
1949 | New Interlocking in Louisville 5.3 MB |
1949 | New York Central Installs Interlocking 3.3 MB |
1949 | A. H. Rudd obituary 947.2 KB |
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1949 | A. H. Rudd obituary 947.2 KB |
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1949 | Main Line Crossovers 2.4 MB |
1949 | Hold-Out Signals in CTC 1.0 MB |
---|---|
1949 | Modern Signaling on a Division 6.6 MB |
1949 | A. A. Freiberger 827.1 KB |
---|---|
1949 | A. H. Rudd obituary 947.2 KB |
1949 | New Interlocking in Louisville 5.3 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | Modern Signaling on a Division 6.6 MB |
---|
1949 | A. A. Freiberger 827.1 KB |
---|
1949 | An Unusual Automatic Plant 4.5 MB |
---|
1949 | A Century of Signal Glass Developments 4.2 MB |
---|
1949 | Two-Way Radio Speeds Busy Terminal Operation 3.0 MB |
---|
1949 | A Century of Signal Glass Developments 4.2 MB |
---|
1949 | 40-Hour Week Means More Signaling 1.1 MB |
---|
1949 | Signal Research and Development 2.9 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | 625 Miles of CTC in one Stretch 7.9 MB |
---|
1949 | Milwaukee Installs Automatic Block 8.2 MB |
---|
1949 | New York Central Installs Interlocking 3.3 MB |
---|
1949 | A. H. Rudd obituary 947.2 KB |
---|
1949 | 625 Miles of CTC in one Stretch 7.9 MB |
---|
1949 | New Automatic Block on the Katy 4.7 MB |
---|
1949 | Coast Line Replaces Signaling On Engine District 8.1 MB |
---|---|
1949 | New Automatic Block on the Katy 4.7 MB |
1949 | A Century of Signal Glass Developments 4.2 MB |
---|---|
1949 | Train Operation By Signal Inidication Used Extensively on the Nickel Plate 6.1 MB |
1949 | Varied Light Intensity 921.0 KB |
1949 | A Century of Signal Glass Developments 4.2 MB |
---|
1949 | A Century of Signal Glass Developments 4.2 MB |
---|
1949 | A Century of Signal Glass Developments 4.2 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | 192 Miles of Automatic Block On Soo Line 6.0 MB |
---|
1949 | Applications to ICC 1949-11 926.1 KB |
---|
1949 | Yardsticks 947.2 KB |
---|
1949 | 192 Miles of Automatic Block On Soo Line 6.0 MB |
---|
1949 | ICC Issues Statistics 850.7 KB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | Modern Signaling on a Division 6.6 MB |
---|
1949 | Signaling Saves Time on Frisco 4.8 MB |
---|
1949 | Main Line Crossovers 2.4 MB |
---|
1949 | Signaling Saves Time on Frisco 4.8 MB |
---|
1949 | Raising Poles 1.9 MB |
---|
1949 | Texas & Pacific New All-Relay Interlocking 4.3 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | Insulation of Rails 874.8 KB |
---|---|
1949 | Train Operation By Signal Inidication Used Extensively on the Nickel Plate 6.1 MB |
1949 | The Transistor 3.1 MB |
---|
1949 | Insulation of Rails 874.8 KB |
---|
1949 | 625 Miles of CTC in one Stretch 7.9 MB |
---|---|
1949 | An Unusual Automatic Plant 4.5 MB |
1949 | Applications to ICC 1949-11 926.1 KB |
1949 | Signaling Saves Time on Frisco 4.8 MB |
---|
1949 | New Interlocking in Louisville 5.3 MB |
---|
1949 | Signal Indications to Stop Trains When Dragging Equipment Detectors Operate 922.0 KB |
---|---|
1949 | Yardsticks 947.2 KB |
1949 | Milwaukee Installs Automatic Block 8.2 MB |
---|
1949 | 192 Miles of Automatic Block On Soo Line 6.0 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1949 | Loudspeakers on the "J" 7.9 MB |
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1949 | Loudspeakers on the "J" 7.9 MB |
---|---|
1949 | Two-Way Radio Speeds Busy Terminal Operation 3.0 MB |