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 270
Pigs. 2.505 and 2,506.—PI • 2t»ctioo iubUuiuent. Ques. How does it work? Ans. Eddy currents are induced in the two copper pla:shields C, which attract those in the disc, producing in conse-quence a torque in the direction shown by the arrow, against INDICATING DEVICES 1,789 the opposing action of a… … Fig. 2,507.—Diagram showing construction and operation of Hoskins instrument. It is of themodified induction type in which the torque is produced from the direct repulsion betweena primary and a secondary, or induced current. As shown in the diagram, the instrumentembodies the principle of a short…
Electrical engineering
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