Union Switch and Signal Company

• Electro-Pneumatic Interlocking
• A Catalogue of the Devices and Their Parts Manufactured by the Union Switch & Signal Co.
• A Catalogue of the Devices and Their Parts Manufactured by the Union Switch ...
• Bulletin, Issues 12-47
• Bulletin, Issues 50-105
• Descriptive circular of the Westinghouse friction buffer (U.S. patent no. 391,997, issued October 39, 1888)
• Electro-pneumatic interlocking and its application at the Boston Southern Station
• Generalized traffic control, CTC
• Reference book of interlocking signaling devices and parts used in connection therewith, as manufactured by the Union Switch and Signal Co., Swissvale, PA
• Report on Pere Marquette Railway Mount Morris to Bridgeport centralized traffic control system, showing actual time saved, accuracy of predicting time saved, financial comparisons with other methods of operation
• The Union Switch and Signal Co., manufacturers of railroad signaling appliances of all descriptions, frogs, crossing[s], switches and switch stands
• The Union Switch and Signal Company, manufacturers of railroad signaling appliances of all descriptions, frogs, switches and crossings