Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 141
ing these contacts. The connections of the main Hne and artificial line cir-cuits of automatic duplex apparatus as arranged in the 126 TELEGRAPH ENGINEERING … Fig. 15. Barclay printing telegraph system are shown in Fig. 15for one terminal station. In the figure, C is the pole-changer, D, D are the generators, P is the polarized relay with its coils connected inparallel, ^L is the artificialline, and g is a differentialgalvanometer which aids inline…
Telegraph
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