Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 325
circuit and induction coil; for,although the current operating it comes from the central office, anyfluctuations in this current caused by the transmitter will passthrough the low-resistance battery, d, which will act in this casevery much in the same manner as a condenses COMMON BATTERY… … FIG. 233.-COMMOX-BATTEKY SWITCH-BOARD FOR SMALL EXCHANGES. sufficiently to accommodate the different class of apparatus. A com-plete switch-board adaptable to exchanges, having not over onehundred lines, is shown in Fig. 253. CHAPTER XIX.COMMON BATTERY SUB-STATION- EQUIPMENT. The essential features…
Telephone
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