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 285
derable extent,perhaps both through ignorance and abuse; thus, bells fitted withelectrical, or electro-mechanical controlling devices, the equivalent ofthose shown in figs. 3,212 and 3,217 are often spoken of as relay bells.This error will be avoided, by remembering that the object of a relayis to… … AUXILIARY CIRCUIT Fig. 3,257.—Elementary relay bell with relay having continuous ring device. The relay hastwo independent magnets M, and S, the latter performs the same service as the twomagnets of the relay in fig. 3,256, while M is for continuous ringing. In operation,when the push button is…
Electrical engineering
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