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 190
inturn is regulated by the strength of the batteryand the adjustment of the screws L and M. Thefaster the diaphragm vibrates the louder the tonebut the more current the horn will draw. Electric Door Locking Device. Several types of electrically operated door lock-ing bolts may be made by the… … Solenoid Bearing LockingBar Fig. 77. Practical and Easily Built Door Locking Devices. magnets mounted on the door just below the knoband three or four inches from the edge, whichactuate a soft iron armature which in turn drawsthe bolt. The magnets may be taken from an old 190 ELECTRIC TOY MAKING.…
Electric apparatus and appliances · Electric toys
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