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 71
e purpose. The Safe Protector. This apparatus is what may be termed a combinedelectrical and mechanical safe protector. The illus-tration shows its application and principle. In Fig. 2 the ordinary bell, such as described in its 70 ELECTRIC TOY MAKING. proper place (page 67), with battery,… … Fig. 27. The Safe Protector. by the opening of the safe door, closes the circuit.Such a switch is so simple that enlarged descriptionis not required. This switch is actuated by the safe THE SAFE PROTECTOR. 71 door. When closed, the door keeps the circuit openby pressing on the switch. When the door…
Electric apparatus and appliances · Electric toys
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