A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 525
transmission of articulatespeech. (See Telephone.) Telegraphy, Step-by-Step A sys-tem of telegraphy in which the signals areregistered by the movements of a needle overa dial on which the letters of the alphabet,etc., are marked. Dial telegraphs are especially employed forcommunication by those who… … Fig. 540. Step-by Step Wheel. movement in one direction only. The alternateto-and-fro motions of the armature of an electro-magnet are employed to impart a step-by-stepmot.on to a peculiarly shaped toothed wheel T, T, Fig. 540, through the action of a horizontalarmc, attached thereto, and moving…
Electricity · Electrical engineering
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