International Library of Technology · Scranton, International Textbook Co. · leaf 716
onnection with each other. 48 INTERIOR WIRING. 28 67. Since the battery is momentarily short-circuitedevery time a spark is obtained, it would soon run down ifthe contacts on the burner were to remain permanentlytouching. To give notice of this, a relay (Fig. 35) may beused in series with the… … Fig. 35. is passing. If a short circuit occurs, the armature isattracted, and the spring d is pressed against the platinum-tipped screw s, completing a local circuit by means of thewires e, f through a vibrating bell and one-cell battery.The current used in lighting the gas at a burner is of…
Electrical engineering
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