Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 629
OTECTIVE DEVICES. 607 through the left hand arrester may be traced by following arrow,b, from the switch-board wire through the bolt, and thence fromthe outside spring of the left hand heat coil through this coil andto the line spring as shown. The two pairs of carbon plates arenormally held… … TO siv/rcivao^^o. FIG. 441.—COOK COMBINED HEAT COIL AND CARBON ARRESTER. presence of the mica strips between the carbon blocks. The groundplate or strip is usually of German silver or brass, and is supportedby and in electrical contact with the heavy iron strip upon which allof the arresters are…
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