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 157
d screw which passes up through the brassstrip into the knob. 156 ELECTRIC TOY MAKING. In the base directly under this screw is .placed an-other round-head screw. When the key is depressed,these two screws meet and make a contact. Twobinding posts are located on the back of the base. The circuit is… … Fig. 65. Telegraph Key. make good contact, they may be cleaned with finesandpaper or emery cloth. Sounder. This instrument can be readily made by anyonehaving a few tools. In the construction here shown, the cores of theelectromagnet are formed of 5-16-inch flat-head wood SOUNDER. 157 screws about…
Electric apparatus and appliances · Electric toys
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