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.
1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Color Light Train Order Signals Are Effective 2.9 MB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
1928 | Emergency Release Circuits 2.4 MB |
1928 | Santa Fe Governs High Speed Main-Line Movements with Dwarf Signal 502.9 KB |
1928 | Should Call-On Arms Be Used? 1.0 MB |
1928 | Train Signs or Indicators 468.2 KB |
1928 | Are Call-On Signals Safe? 1.2 MB |
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1928 | Color Light Train Order Signals Are Effective 2.9 MB |
1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
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1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Personal Mention: G. H. Dryden 432.7 KB |
1928 | Extensive Interlocking Changes Made by Boston & Maine 3.9 MB |
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1928 | Preparation of Circuit Plans 576.3 KB |
1928 | Co-ordinating Cab and Wayside Signaling 1.6 MB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
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1928 | Arrangement of Color Light Units 816.2 KB |
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1928 | What Is to Be Gained by Train Stop or Train Control? 463.8 KB |
1928 | C&O Signaling and Train Control Facilitate Operation 4.1 MB |
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1928 | Color Light Train Order Signals Are Effective 2.9 MB |
1928 | Emergency Release Circuits 2.4 MB |
1928 | Automatic Signals Within Yard Limits 1.0 MB |
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1928 | C&EI Installs Automatic Interlocker at Main Line Crossing 3.7 MB |
1928 | Elimination of Derails 796.4 KB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Are Call-On Signals Safe? 1.2 MB |
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1928 | Automatic Interlockers Are Profitable Investments 3.3 MB |
1928 | Automatic Train Control on the Chicago & North Western 5.7 MB |
1928 | Changes on the C&NW 978.4 KB |
1928 | Continued Activity and Development in Signaling 1.1 MB |
1928 | Early APB Signaling 408.5 KB |
1928 | What Is the Cost of a Train Stop? 463.2 KB |
1928 | Burlington Completes Automatic Signals Chicago to Denver 5.1 MB |
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1928 | Centralized Control on Burlington Saves $16,200 a Year 2.4 MB |
1928 | Early APB Signaling 408.5 KB |
1928 | Should Call-On Arms Be Used? 1.0 MB |
1928 | Should Call-On Arms Be Used? 1.0 MB |
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1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
1928 | Continued Activity and Development in Signaling 1.1 MB |
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1928 | Automatic Interlockers Are Profitable Investments 3.3 MB |
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1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Can Preliminary Latch Locking Be Eliminated 595.1 KB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
1928 | Rock Island Completes 33-Lever Electric Interlocker 2.8 MB |
1928 | Should Call-On Arms Be Used? 1.0 MB |
1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Changes on the C&NW 978.4 KB |
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1928 | Circuit Polarity at Relay Contacts 526.2 KB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
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1928 | Emergency Release Circuits 2.4 MB |
1928 | Personal Mention: G. H. Dryden 432.7 KB |
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1928 | Early APB Signaling 408.5 KB |
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1928 | Signaling Half a Century Ago 1.1 MB |
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1928 | Signaling Is an Aid to Greater Equipment Utilization 486.1 KB |
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1928 | What Is the Cost of a Train Stop? 463.2 KB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
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1928 | Changes on the C&NW 978.4 KB |
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1928 | Circuit Polarity at Relay Contacts 526.2 KB |
1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
1928 | Arrangement of Color Light Units 816.2 KB |
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1928 | Emergency Release Circuits 2.4 MB |
1928 | GN Replaces Semaphores with Color Light Signals 1.2 MB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | A Standard Aspect for Highway Crossing Signals 1.8 MB |
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1928 | Union Type HC5 Flasher with Vertical "Stop" Sign 495.9 KB |
1928 | Automatic Interlocker on Chicago Great Western Effects Saving 2.4 MB |
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1928 | C&EI Installs Automatic Interlocker at Main Line Crossing 3.7 MB |
1928 | Changes on the C&NW 978.4 KB |
1928 | Continued Activity and Development in Signaling 1.1 MB |
1928 | Cost of a Train Stop 944.9 KB |
1928 | Emergency Release Circuits 2.4 MB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | What Is the Cost of a Train Stop? 463.2 KB |
1928 | Emergency Release Circuits 2.4 MB |
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1928 | More Comments on Latch Locking 643.4 KB |
1928 | Changes in Types of Interlocking 443.4 KB |
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1928 | Stiles Controller for S. & F. Machine 685.1 KB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Will More Extensive Use of Electric Locking Simplify Interlocking? 642.1 KB |
1928 | What Is to Be Gained by Train Stop or Train Control? 463.8 KB |
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1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Emergency Release Circuits 2.4 MB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | What Is to Be Gained by Train Stop or Train Control? 463.8 KB |
1928 | GN Replaces Semaphores with Color Light Signals 1.2 MB |
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1928 | Arrangement of Color Light Units 816.2 KB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
1928 | Cost of a Train Stop 944.9 KB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | What Is the Cost of a Train Stop? 463.2 KB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Color Light Train Order Signals Are Effective 2.9 MB |
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1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
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1928 | Educational Efforts Lead to Better Signal Performance 511.9 KB |
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1928 | NC&StL Completes Signaling from Nashville to Atlanta, 288 Miles 3.3 MB |
1928 | Train Signs or Indicators 468.2 KB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Color Light Train Order Signals Are Effective 2.9 MB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
1928 | Dispatcher Signaling System Operates Through Sleet Storm 1.1 MB |
1928 | Electric Interlocker and Switch Control Speeds Up Yard Operation 2.4 MB |
1928 | Electric Plant on NYC Replaces Two Mechanical Plants 3.2 MB |
1928 | Elimination of Derails 796.4 KB |
1928 | Normal-Stop Versus Normal-Clear Signaling 529.4 KB |
1928 | Rock Island Completes 33-Lever Electric Interlocker 2.8 MB |
1928 | Signal Aspects for "Head-In" Indication at Passing Track 1.0 MB |
1928 | Are Call-On Signals Safe? 545.6 KB |
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1928 | Arrangement of Color Light Units 816.2 KB |
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1928 | Early APB Signaling 408.5 KB |
1928 | Nickel Plate Installs 169 Miles of Color Light Automatics 3.6 MB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
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1928 | Changes on the C&NW 978.4 KB |
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1928 | Are Call-On Signals Safe? 1.2 MB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Automatic Interlocking (Letter to the Editor) 499.6 KB |
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1928 | Automatic Signals Within Yard Limits 1.0 MB |
1928 | Can Preliminary Latch Locking Be Eliminated 595.1 KB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Personal Mention: G. H. Dryden 432.7 KB |
1928 | Changes on the C&NW 978.4 KB |
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1928 | Obituary: Frank P. Patenall 627.0 KB |
1928 | Personal Mention: G. H. Dryden 432.7 KB |
1928 | Changes on the C&NW 978.4 KB |
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1928 | Getting What You Specify 866.4 KB |
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1928 | Eliminating Danger of False-Clear Semaphores 857.8 KB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Circuit Polarity at Relay Contacts 526.2 KB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
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1928 | Automatic Signals Within Yard Limits 1.0 MB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Saco Lever Circuit Controller 735.1 KB |
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1928 | Why Markers for Automatic Signals? 494.6 KB |
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1928 | Early APB Signaling 408.5 KB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
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1928 | Signal Aspects for "Head-In" Indication at Passing Track 1.0 MB |
1928 | Signals Should Keep Trains Moving 400.7 KB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Automatic Signals Within Yard Limits 1.0 MB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
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1928 | Reporting False Clear Indications 648.8 KB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Train Signs or Indicators 468.2 KB |
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1928 | Changes on the C&NW 978.4 KB |
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1928 | Color Light Train Order Signals Are Effective 2.9 MB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Why Markers for Automatic Signals? 494.6 KB |
1928 | Changes on the C&NW 978.4 KB |
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1928 | What Is to Be Gained by Train Stop or Train Control? 463.8 KB |
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1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
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1928 | Are Call-On Signals Safe? 1.2 MB |
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1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | C&O Signaling and Train Control Facilitate Operation 4.1 MB |
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1928 | Circuit Polarity at Relay Contacts 526.2 KB |
1928 | New Line of DN Relays 816.5 KB |
1928 | New Long-Range Search-Light Signal 1.1 MB |
1928 | Union Type HC5 Flasher with Vertical "Stop" Sign 495.9 KB |
1928 | Obituary: Frank P. Patenall 627.0 KB |
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1928 | Continued Activity and Development in Signaling 1.1 MB |
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1928 | Emergency Release Circuits 2.4 MB |
1928 | Signal and Train Control Hearing Ends 2.0 MB |
1928 | Signaling of Main Tracks Through Yards 446.2 KB |
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