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 492
motor is used for rheostatic control ELECTRIC RAILWAYS 2,583 Ans. The slip ring or external resistance form of inductionmotor. Ones. What kind of resistance is used? Ans. Resistance in the form of grids or liquid. In the case of liquid resistance, the electrodes which dip into theliquid are held… … Fig. 3,636.—Westinghouse unit switch with sides of box, arc chute, cylinder and valve cut away.The construction of the switch includes two stationary copper castings, one of which formsdirectly the upper or fixed contact, while the other serves as a support for the lower ormovable contact. The…
Electrical engineering
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