Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 337
pointed out whenthe cord circuit is considered. This relay, as will be seen by refer-ence to Fig. 264, serves, when operated, to sever the signaling appa-ratus and battery from both sides of the line circuit, thus renderingthe line relay and lamp irresponsive to any movement of the sub-scribers… … -IHON-lNOgCTlVE.-51- 1> FIG. 265.—WESTERN ELECTRIC MULTIPLE SWITCH-BOARD CORD CIRCUIT, —the tip and ring—are connected, as indicated by heavy lines,so as to complete the talking circuit between the two plugs. Thethird contact of each plug is connected through the supervisorysignaling apparatus…
Telephone
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