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 309
Fig. 3,302.—Circuit connections for ringing the more distant one of two bells from either oneor two push buttons. Two batteries, one or more cells each, are required, but only twowires or one wire and ground return. The pushes are of the double contact type.When depressed they make the contacts B,…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
