A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 529
Fig. 544. The Phonic Wheel.binding posts, carries a vertical rotary shaft F.A circular table F1, is provided with a series ofinsulated contacts arranged symmetrically aroundthe axis of rotation of the shaft. A radial arm Fa,connected with the shaft F, carries at its outerextremity a trailing… … Fig. S4S- The Phonic Wheel.table F1, and is brought successively into contactwith the insulated contact pieces placed on theupper face of the table F1. The main line Q, Q, has one of its ends con-nected with the trailing finger f. As the shaftF, rotates, the line is therefore brought into…
Electricity · Electrical engineering
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-319-128.webp)
