Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 193
, B isan electric battery, P apush button, E anelectromagnet, H thebell hammer, and C thepoint of contact be-tween a set screw andone end of a steelspring. The upper endof this spring holds asoft iron bar a short distance from the poles of the electro-magnet. The current rings the bell as follows:… … FIG. 127. — Electric bell, push button,and battery. MAGNETISM AND THE ELECTROMAGNET 179
Physics · Home Economics
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