Electric toy making for amateurs. This work treats on the making of electrical toys, electrical apparatus, motors, dynamos and instruments in general ... By T. O'Conor Sloane .. (1914)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, The N.W. Henley publishing co. · leaf 78
oneor two cords, from the top of the proscenium arch, orceiling, and, in response to the performers orders,plays, raps, etc. The newer construction here illustrated, due toMr. Geo. M. Hopkins, is superior, as it requires only THE MAGIC DRUM. 7 one suspending cord, and, without close inspection,it… … Fig. 30. The Magic Dkum. to the body of the drum. The armature should beas close to the poles of the magnet as possible, with-out touching, even when the current is turned on. A sudden exciting or releasing from excitement ofthe magnet will produce a sound, on the generalprinciple of the make and…
Electric apparatus and appliances · Electric toys
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