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 267
ich attracts the armature. Near the end of its 2,358 HAWKINS ELECTRICITY movement the contact maker closes the circuit through the demag-netizing coils, which being wound to oppose the other coils, the•magnetism due to the magnetizing coils is neutralized, that isto say, the magnet is demagnetized,… … ARMATURE DEMAGNETIZINGCOILS CONTACT MAKER Fig. 3,222.—Elementary differentially wound vibrating bell. _ It is essentially an ordinaryvibrating bell whose magnets have two equal and oppositely wound sets of coil, andwhich is fitted with a contact maker instead of a contact breaker, and so connected…
Electrical engineering
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