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 347
can be contractedto any desirable extent, regulating the arc voltage to a desirable working value. 2.438 HAWKINS ELECTRICITY be made to short circuit the disabled lamp and at the sametime introduce into the circuit resistance of the same value asthat of the lamp. There are various conditions… … Fig. 3,351.—Elementary differential control lamp having ring clutch rod feed, and automaticcut out and substitutional resistance. The cut out consists of a pair of contact and abridge operated by a compound wound solenoid. For clearness the series and shuntwindings are shown separated, the plunger…
Electrical engineering
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