A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 104
nd registering small intervals of time. Chronographs, though of a variety of forms,generally register small intervals of time bycausing a tuning fork or vibrating bar of steel,whose rate of motion is accurately known, totrace a sinuous line on a smoke-blackened sheetof paper, placed on a cylinder… … Fig, 122* Electric Chronograph. An electro-magnet is used to make marks onthe line at the beginning and the end of theobservation, and thus permit its duration to bemeasured. In the form of electric chronograph shown Clir.] 95 in Fig. 122, an electro-magnet, the armature ofwhich carries a pen, is…
Electricity · Electrical engineering
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