Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 78
uplex circuit, as used by thePostal Telegraph-Cable Company, are shown in Fig. 13.Fourteen-hundred-ohm resistances are in series with thegenerators, and 2200-ohm shunt or leak paths are providedto ground. The difference of potential between the point y and ground does not exceed X 380 or 233 1400 +… … -=G Fig. 13. ^G the artificial line has a resistance of 1700 ohms, this poten-tial difference would fall to 380 — 1400 380 1400 + (1700 + 150) 2200 or 159 volts, 2200 + 1700 + 150 when the armature makes contact so that no current flowsover the line. In this way the voltages available at…
Telegraph
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