A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 80
alibration, a method for preventing the oc-currence Of variations in the intensity of thefield of the galvanometer, due to the neigh-borhood of masses of iron, etc. Calibration, Relative The deter-mination of the relative values of the readingof an electrometer, voltmeter, amperemeter,or other… … Call-Bell, Extension (See Pell, Extension Call)Call-Bell, Magneto-Electric An electric call-bell operated by currents pro-duced by the motion of a coil of wire beforethe poles of a permanent magnet. A well known form of magneto call-bell is shown
Electricity · Electrical engineering
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