Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 823
times. If, then, the coil and needlehave such a shape, and the axis of the needle makes such a 802 ELECTRICAL MEASUREMENT. proper initial angle witli the axis of the coil that the deflectionof the needle up to not more than 36 is proportional to the cur-rent, then with the wheel and pinion… … Fig. 508. delicate cylindrical spiral springs, S, S; one or both of whichmay be employed, since the latter can be thrown out of gear byraising the arm, A, which is done by turning the head, H, ofthe adjusting screw. If both the springs be of the samestrength, then the sensibility of the instrument…
Electrical engineering
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