Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 275
e A. C. ammeter, and can beused also in the A. C voltmeters;it makes use of its controllingspring only for the purpose of re-sisting the pull on the vane andthe returning of the pointer tozero. The dynanometer move-ment is recommended for volt-meters. Fig. 2.516.—Wag-ner 25 watt pres-sure… … INDICATING DEVICES 1,795 Ques. How does the dynamometer operate? Ans. When current is passed through both coils, the movablecoil is deflected against one of the stop pins, then the tortionhead is turned to oppose the movement until the deflection hasbeen overcome and the coil brought back to its…
Electrical engineering
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