Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 627
ryrecent time. As two heat coils and two carbon arresters are used in connectionwith each line circuit in a modern central office, economy of space PROTECTIVE DEVICES. 605 and in the amount of wiring between them, has brought about theassociation of the carbon arrester with the heat coil device in… … FIG. 437.—PROTECTIVE APPARATUS FOR SUBSCRIBERS STATIONS. heavy strips of cold rolled iron, a single strip containing from fiveto twenty banks, each bank containing twenty pairs; eachstrip therefore contains from loo to 400 pairs of arresters,according to the requirements of the available space and…
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