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 212
■i^^^Bj Hgs. 3,142 to 3,151.—Various forms of anchor gap. These little devices of which two typesand several designs are shown, are employed to automatically connect the high tensioncircuits with the aerial wire when messages are being sent to insulate the transmitter fromthe receptor when the…
Electrical engineering
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