Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 465
from the two line wires, A andB, respectively. These two branches are united at e, and connectedwith the ground at G. The signal bell, £>, is connected with thelocal battery, s, in a circuit, the continuity of which is controlledby each of the relays, R and 7?=. Unless the armatures, 13, of… … 443 444 AMERICAN TELEPHONE PRACTICE. from those of all other stations. Thus at station S the main-con-ductor, A, is branched through a polarized relay made responsiveto positive currents from the central office, and the main conductor, B, through a neutral relay, R, adapted to respond to currents…
Telephone
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