International Library of Technology · Scranton, International Textbook Co. · leaf 692
, which is tippedwith platinum in order to preventoxidation of the contact surface,through the spring / and the end pof the armature to the coils of themagnets m, m, and out at the ter-minal f. When no current is pass-ing, the armature is held away fromthe poles of the electromagnets, asin the… … § 28 INTERIOR WIRING. 25 hammer h to strike the bell. This movement breaks thecircuit between .? and /, and the iron cores being therebydemagnetized, the spring c draws the armature away, whenthe spring / again touches the screw s, completing the cir-cuit. As long, then, as the battery current is…
Electrical engineering
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