Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 840
nter 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 coilconsisting of several turns of thick, and a… … Fig. 520. wire coils by mercury cups, into which dip the ends of the wireforming the rectangle. The base board has three levelling screws;the level consists simply of a small pointed weight hung at theend of a rod (seen on the right of the figure), the pointed endhangs exactly over a fixed point…
Electrical engineering
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