Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 57
aters, attendants,each in charge of a certain number of sets, are required tosupervise the working of the repeaters and make such ad-justments as are necessary to maintain uninterruptedservice despite changes in weather conditions and irregu-larities in sending. With several types of… … Fig. 23. lays, is represented in Fig. 23. When no messages arebeing transmitted, no current flows through the Hne wiresand repeater relays, and consequently both relay arma- * For description see Mavers American Telegraphy.t Described in McNicols American Telegraph Practice. SIMPLEX TELEGRAPHY 43…
Telegraph
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