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 464
size of themotor. The brushes slide in finished ways, and are pressed against the commutator by ELECTRIC RAILWAYS 2,555 periods without attention. The first requirement calls forenclosed construction, thus instead of a frame as in the ordinarymotor, this number takes the form of a case or the iron… … Fig. 3,517.—General Electric standard box frame motor. In this type the magnet frame isone piece of cast steel, and, as shown, is approximately octagonal in shape. The frame isprovided with bored openings at each end, through which the armature, pole pieces, andfield coils can be inserted or…
Electrical engineering
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