Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 122
as devised andemployed by Professors Bedell and Ryan. (See Trans. Am. Inst. El.Engrs., Oct. 18, 1893.) Price on application. Gives a perfectly constant and instantaneous contact, which isentirely free from the usual variations produced by exidation and wear ofbearing surface. We are the sole… … Fig. 93. W4640. W4640. Nortlirup Oseillatiiig^ Current Oalvaiioiiieter.. |45 00 The working of this instrument depends upon tlie principle that whena mttallic disc is suspended in a coil, the plane of the disc making with theplane of the coil an angle of about 45° the disc will tend to rotate,…
Electric apparatus and appliances · Equipment and supplies
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