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 253
able also that the brake itself be so ELECTRIC ELEVATORS 2,907 designed as to permit of a gradual, rather than a sudden braking effect,so as to avoid jarring the car by stopping it too quickly. The Transmission.—The term transmission, as generallyand erroneously used, denotes the system of gearing… … 4,176.—Cutler-Hammer alternating current, reversible, single speed, semi-mechanicalcontroller with self-contained reverse switch for slow speed passenger or freight elevators:25 to 60 cycle circuits with two or three phase slip ring induction motors where ratedfull load rotor circuit does not…
Electrical engineering
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