Easy electrical experiments and how to make them; by Dickinson Leonard Perley 1874-

Author:Dickinson, Leonard Perley, 1874- [from old catalog]
Language: eng
Format: epub
Tags: Electric apparatus and appliances, Electricity
Publisher: Chicago, F. J. Drake & co
Published: 1918-03-25T05:00:00+00:00

EASY ELECTRICAL EXPERIMENTS,

105

of the wooden framework, at a distance of 4 inches from the center, by means of a double pointed tack driven tightly into the wood. This tack should grip the wire close to the coil, so that the loose end of the wire may project from the rheostat, to make one terminal of the apparatus. Pass the other end of the coil upward through a small hole close to one of the copper sectors, and clamp the loose end of the wire under the

Fig. 3.

screw of one section. The coil should be drawn tightly against the upper board, as this draws the spirals of the coil apart and prevents their touching each other.

At a distance of ¥% inch from the first hole just bored, bore another, and through this pass the upper end of another coil of wire, securing it to the same sector of copper as the first coil. Fasten the lower end of this coil to the bottom board, in the same way as the first was fastened. However, when the third coil is put in place, the lower end of the second coil is

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