A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 508
gaslight-ing. It consists essentially of two electro-magnets, one for turning the switch which lights the lamp by cutting them into the circuit of thelighting mains or conductors, and the other forextinguishing them, by cutting tnem out. Theseelectro-magnets are operated by two push buttons,a black… … Fig. 519. Automatic Switch. the lamps to be lighted, to the contacts betweenthem. The push buttons, P1 and P2, are con-nected by their wires to the main M1 and thebranch B1. These buttons are made respectively positiveand negative, and are marked -j- and —. Thethird wire of the push button is…
Electricity · Electrical engineering
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