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 254
, and isdesigned to be suitably geared to the operating shaft of the elevator. As the reverseswitch affords the only control over the line circuit, it is essential that the operating cablefrom the car be provided with a centering device. The acceleration of the motor is auto-matic and is… … Fig. 4,177.—Cutler-Hammer alternating current, reversible, single speed, full mechanicalcontroller for slow speed freight _or passenger elevators; no electro-magnet or slidingcontacts are used. Tt is primarily adapted for use in connection with polyphase alternatingcurrent slip ring induction…
Electrical engineering
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