Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 263
both used. ELECTRIC ELEVATORS 2,917 The advantages of herringbone gears may be stated as follows:The action is continuous and smooth; there is no shock when theload is transferred from tooth to tooth, and therefore wear ispractically eliminated; the bending action of the load on theteeth is less… … Fig. 4,186.—Detail of Kaestner and Hecht electric brakes. In operation, the brake is mechan-ically closed by the spring shown at the lower end, and electrically released by the solenoidat the top. NOTE.—The fundamental principle of the action of herringbone gear teeth lies in thefact that all…
Electrical engineering
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