Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 203
ing apparatus in the circuit of theline, rendering his generator and call bell inoperative. The circuitconditions are now those shown in Fig. i6o. The operators talk-ing apparatus, T, at the central office consists of a transmitter andbattery placed in the local circuit containing the primary… … FIG. 160.—CIRCUITS MAGNETO SWITCH-BOARD-QPERATOR ANSWERING. over which the subscriber is able to converse with the operator isobvious. Having learned the number the subscriber wanted, theoperator inserts the calling plug, P, associated with the plug, P,into the jack of the calling subscriber, and…
Telephone
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