A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 527
irection 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 horizontalarm c, attached thereto, and moving between thetwo prongs of a fork d, vibrating on… … Fig. 541, Breguets Indicator. the dial, shown in Fig. 541, on which are markedthe letters of the alphabet and the numerals. The sending instrument is called the manipu-lator. It consists of a device for readily sendingover the line the number of successive impulsesrequired to move the needle…
Electricity · Electrical engineering
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