Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 360
iber hangs up his receiver the correspondingline relay will be de-energized, thus allowing its armature to fallback. This removes the shunt of the lo-volt lamp from about the6-volt supervisory lamp, and at the same time puts a low resistanceshunt (39 ohms) about the iio-ohm resistance coil. The… … FIG. 276.-DETAILS OF STERLING CIRCUIT. of the iio-ohm and the 39-ohm coil in parallel, under which con-ditions this lamp is lighted to its full candle power, thus giving tothe operator the supervisory signal. In order to separate the two sides of the cord circuits from eachother, and thus prevent…
Telephone
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