Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 89
in the booster, B, which assists the battery to discharge. Fig. 12.3.—Connections for an externally controlled automatic booster system (Endtasystem). L is a carbon-resistance regulator; S a solenoid, and D a spring. When the loadis normal, the resistances, Ri and R2, are equal, and there is no… … Fig. 124.—Connections for an externally controlled automatic booster system (Bijur).S is a solenoid; D a spring; Ci and C2 taps from a resister; Q and Qo vessels containing mercury.The magnet and spring are So designed that for a given current, the pulls of the magnet andthe spring are the same,…
Electric wiring
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