Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 68
ed inseries with the two condenser sets in order to vary the timeof their charge and discharge to approximate the cor-responding times for the line. The design of the Western Union artificial line is shown DUPLEX TELEGRAPHY 53 in Fig. 6. The resistance between the terminals Ground and Relay can be… … /8 A/zl 1 2 WzA /a Fig. 6. ohms, the next adds from o to 600 ohms and the thirdadds 200 to 1000 ohms. When a line becomes leaky in wetweather, the resistance of its artificial Hnes must be loweredfor balance. 4. Polarized Relays. — The polar duplex telegraphsystems depend for their operation upon…
Telegraph
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