Explore the evolution of railroad safety with a comprehensive catalog of interlocking and signaling devices from the Union Switch & Signal Company. This volume surveys the machines, signals, and parts that keep rail lines moving safely and efficiently.

Framed around the Saxby & Farmer Improved Interlocking Machine and the Electro-Pneumatic family of devices, the book explains how these systems work, where they are used, and what components they include. It also provides practical guidance on ordering parts and understanding the plates, tables, and diagrams that illustrate each device. The work highlights the company’s reach across major terminals and railways, and it showcases a wide range of signals, locks, and switch equipment.

Detailed descriptions of interlocking machines and block signaling devices.
Observations on installation sites, layout, and typical configurations.
Plate-by-plate references and part lists to aid ordering and replacement.
Practical notes on maintenance, testing, and system evolution.

Ideal for readers interested in railroad signaling history, engineering professionals, and anyone needing a grounded reference to these essential safety technologies.

"About this title" may belong to another edition of this title.

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