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 139
f the charging 2,232 HAWKINS ELECTRICITY current. Accordingly, when, due to electrostatic charge or dis-charge of the main line, the current in the main line coil of therelay is increased above that traversing the artificial coil of the relay,a false signal will be produced unless, at that instant,… … PlG. 3,080.—Voltaplex key as used in the voltaplex system of duplex telegraphy. The volt-aplex is a system of duplex telegraphy of the superposed type; that is, a wire providedwith ordinary Morse instruments is also equipped with the voltaplex instruments, andas neither system interferes with the…
Electrical engineering
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