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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 289

An illustration from American telephone practice, 1905, leaf 289
and P. In both of thesecases, in which the battery is included in the cord circuit in serieswith the combined ciruit of the two lines, the use of a separate bat-tery for each cord circuit is, under ordinary circumstances, necessary.This is always true of the grounded system shown in Fig. 226, and… … FIG. 228.-SINGLE BATTERY SERIES SYSTEM that it was possible to supply all of the cord circuits from a singlebattery by connecting them in the manner shown in Fig. 228. Thisinvolves the bunching together of one side qf each of the cord cir-cuits, the battery supplying current in multiple to the…

Telephone

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