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 42
hich haveI/O core to support or carry the wire, and in whichthe wire must be compact and adherent, layer to layer, MAGNETIZING COILS. 41 requires special care. They are wound upon amandrel, a cylinder generally, which is afterwardswithdrawn. It is necessary to arrange so that thiswithdrawal will be… … F.G. 14. Magnetizing Coil. To make a magnetizing coil a mandrel of any con-venient material is selected. A piece of paper iswrapped around it and on this the insulated wire iswound as neatly as possible. This may be done byhand as regularly as is possible on a lathe, althoughthe use of the latter…
Electric apparatus and appliances · Electric toys
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