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 233
F\)SE,5 j … BRAKE! MAGNET Fig. 4,153.—Diagram of Burdett and Roundtree push button controller for dumbwaiter. at the last landing, instead of coasting past the limits whenlight or heavily loaded and hitting the bumpers at the top orbottom of the shaft. Ques, When is the motor series field winding used? Ans. It…
Electrical engineering
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