Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 213
I in Fig. 2. A very simple way to do this is to cut out a 198 EASY ELECTRICAL EXPERIMENTS. long narrow strip of thin sheet brass, such as is shown atP in Figs. 1 and 2. By means of two holes through thispiece near one end, which are just big enough to allow theneedle to pass easily, the piece of… … Is bent over at right angles at a distance of 5-16 inch fromthe upper end of the needle. The object of this bend is two-fold. First, it is to be used to support the pointer N bybeing bent around the latter, and for this reason the stripat this point should be cut rather wide, say % inch. Second,the…
Electric apparatus and appliances · Electricity
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