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The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)

Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 630

An illustration from The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering, 1897, leaf 630 — Fig. 387. Voltmeter Switch. … Tachometer. An instrument which, by a pointer on a dial, indi-cates at any moment the revolutions per minute of a revolving body. It comprises a small governor whoseshaft is rotated by the revolving body.The centrifugal force of the governorweights is resisted by a helical spring.The deflection of…

Electricity

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