A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 78
Fig. 88. Push Button. Fig. 8q. lush Button. contact, and thus completes a circuit in whichsome electro-receptive device is placed. Thiscircuit is opened by a spring,on the removal of the pressure.Some forms of push-buttons areshown in Figs. 88, 89 and 90. A floor-push for dining-roomsand offices is…
Electricity · Electrical engineering
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