The general arrangement of a Westinghouse electric brake commonly used in trolleys at the turn of the century. (a) and (a') are the track shoes, (b) and (b') are the brake shoes, (c) is the magnetizing coil that receives current from motors running temporarily as generators, (d) and (d') are springs that the brakes are suspended from, and (e), (k), (h), and (f) are levers that assist with the movement of the brake system.
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International Correspondence Schools A Textbook on Electric Lighting and Railways (Scranton, PA: International Textbook Company, 1901)
Courtesy the private collection of Roy Winkelman