Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 839
mometer cannot be satisfactorily usedfor measuring rapidly reversing electro motive force, because ofthe retardation arising from self induction. SIEMENS ELECTRO DYNAMOMETER. A general view of this instrument, which is suitable for meas-uring current strength, is shown in fig. 519. It consists of a… … Fig. 519. number of degrees to which this pointer points evidently indi-cates the amount of torsion given to the spiral spring. To therectangle also is fixed a pointer, the end of which just laps over SIEMENS ELECTBO DYNAMOMETER. 819 the edge of the graduated dial. The rectangle encircles a…
Electrical engineering
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