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 294
ng the ground wires to a gas or water pipe. ELECTRIC BELLS 2,385 The wire from the push to the battery may be run through holesbored in the floor directly under the push, but inside the front door,then along the cellar beams to the battery. In many houses the wirefrom the push to the bell may also… … Fig. 3,275.—Parallel connected push buttons for ringing one bell from several points. Itis obvious that if the push button were connected in series, all would have to be closedto complete the circuit. Bell Circuits.—The connections of various types of bell areshown diagrammatically, in the…
Electrical engineering
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