Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 336
s, as will be ^een, that alreadydescribed in a previous chapter as being the standard Bell sub-sta-tion equipment. It may be well, however, to reiterate that when thereceiver is on its hook the circuit of the line is open on account ofthe condenser, while, when the receiver is removed from the… … FIG. 264.-WESTERN ELECTRIC MULTIPLE SWITCH-BOARD LINE CIRCUIT answering jack, after which they connect respectively with twoback contacts of a relay, c, called the cut-off- relay. These contactsnormally rest against two movable levers, of which the one con-nected with the tip side of the line is…
Telephone
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