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 263
be classified as 1. Plunger; 2. Inclined coil; 3. Magnetic vane. 1,782 HAWKINS ELECTRICITY Qiies. Describe the plunger type. Ans. This type of ammeter consists of a series coil and asoft iron plunger forming a solenoid, the plunger is so suspendedthat the magnetic pull due to the current flowing… … Fig. 2,497.—One form of plunger instrument as made by Siemens. // has gravity control,is dead beat and is shielded from external magnetic influence. The moving system con-sists of a thin soft iron pear shaped plate I pivoted on a horizontal spindle S running injewelled centers. To this spindle S is…
Electrical engineering
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