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 128
oldsthe transmitter B closed, thus keeping section B of the mainline intact. If the operator at the transmitting key B desire THE TELEGRAPH 2,221 to send, and break the circuit, the armature of relay E remainson its back stop, and on the first downward stroke of thearmature U, the local circuit of… … 6~ Pig. 3,066.—Milliken repeater system. It consists of two extra magnet relays and two tonguecontact repeaters, connected as shown. In the figure, the relays Ra and Rb are providedwith additional or extra magnets ra and rb, whose levers press against the main levers insuch a manner that when the…
Electrical engineering
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