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 455
otor, the motor thus .returning power to theline and at the same time acting as a brake preventing any considerable 2,546 HAWKINS ELECTRICITY increase in speed. Regeneration, as this action is called, can also beobtained with the other types of motor, but only at increased expensefor the additional… … Figs. 3,501 and 3,502.—Trolley wheel and harp. The word trolley signifies the wheel which issupported at the top of the trolley pole, and which makes rolling contact with the overheacconductor. As shown, the trolley consists of a light wheel W, usually of bronze, supportedin a frame or harp H, and…
Electrical engineering
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