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 262
h-man is not attending to his duty. ELECTRIC BELLS 2,353 Ques. Describe the operation of a continuous ringingbell with an electrical circuit maintainer. Ans. The essential parts are shown in fig. 3,212. In opera-tion, when the starting circuit is closed by depressing the pushbutton, current flows… … OVING CONTACT t ^STATIONARY CONTACTS GUIDE PLUNGER ELECTRICAL CIRCUITMAINTAINER SOLENOIDGUIDE MANUAL CONTROL BUTTON Fig. 3,212.—Elementary continuous ringing bell with electrical circuit maintainer. It con-sists of an ordinary vibrating bell fitted with a solenoid operated switch which remainsin…
Electrical engineering
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