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 136
detail in fig. 3,078. strength of the current flowing through one set of the differentialcoils of each relay, magnetizing them and causing them to worktheir respective sounders in response to the signals sent fromthe opposite station. Ques. In practice are the relays connected direct tothe keys as… … Fig. 3,077.—Bunnell autoplex or semi-automatic transmitter. This apparatus is for auto-matically making dots, so as to enable operators to transmit Morse characters withoutthe excessive strain necessary for such transmission with ordinary key. m It is a simple in-strument, and has a highly polished…
Electrical engineering
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