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 121
con-nected to the relay main circuit,and the auxiliary circuit to theelectromagnet of the repeater. There is a ground return onmain circuit, and metallic returnon auxiliary circuit, one or morecells being included in each ofthese circuits as shown. The contact maker circuit ofthe repeater (which… … THE TELEGRAPH 2,215 and from which section C begins, the number of repeater station de-pending on the total length of the line. Ques. What is the objection to the arrangement shownin fig. 3,058? Ans. It will only work in one direction.Ques. How is this overcome? Ans. By use of a button type…
Electrical engineering
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