Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 113
e quadruplexcircuits, now the standard of the Western Union TelegraphCompany, embody the principles of the bridge duplex,already considered in § 8 of Chap. II. The connections ofthe apparatus at one station of the Western Union quad-ruplex are shown in Fig. 9. The retardation coil /,the… … Fig. 9. available potential is again effected by the Field system, Tbeing the transmitter and ^2 and r^ being respectively theadded and leak resistances. Both the repeating sounderand neutral-relay holding-coil methods (see § 3) are utilizedin tiding over the period of zero magnetization in…
Telegraph
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