Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 358
rings is read on an accurately graduated dial. The pointer attached to the movable coils, which shows when a balanceis obtained, is provided with a small square frame in the center of which is a sight wire. The manually-operated pointer is provided with a vernier divided into ten divisions and, as… … Fig. 31. Interior View of Precision Wattmeter Courtesy of Westinghouse Electric and Manufacturing Company 322 ELECTRICAL MEASUREMENTS 27 These instruments are made as voltmeters and ammeters,having an outer scale graduated in degrees and an inner scalereading directly in volts or amperes; they are…
Electrical engineering
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