Dodge, Mary Mapes, 1830-1905 · New York : Scribner · leaf 568
the spring-brass neck at D makesit do so. The loose brass-end then, on touch-ing the screw-point, conducts the current throughthe coils again with the continual vibrating ac-tion as long as the electric current is passingin at A and out at C. The greater the volumeof current the greater the number… … FIG. 27. GENERAL VIEW OF BUZZER. Paste pieces of heavy paper over the heads ofthe bolts to overcome residual magnetism. An electric bell is made the same as a buzzer,but, continuing on from the end of the armature,a wire or rod is mounted with a ball or clapperat the end, which strikes the bell as…
Children's literature
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