Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 56
f Elec-tro-magnetism. — Among practical appli-cations of the electro-magnet may be men-tioned the field coils of motors, dynamos,parts of arc lamp mechanisms, electricbells, and relays and sounders for telegraphwork. The electric bell. Figs. 53, 54, 55,consists of a small pair of magnets con-nected… … Fig. 53. —ElectricBell (M. E. S.Co.). ELECTRO-MAGNETISM 35 This opens the circuit at A, and the spring returns theclapper armature to contact position again. This producesa continuous ring. A buzzer operates — upon the same principle as the electricbell, except that the bell and clapper areremoved,…
Electricity · Electrical engineering
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