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 365
lection.An advantage of this instrument is the unusually long and openscale, extending about 300 degrees, Fig. 38. Westinghouse Types. The \Yestinghouse ammeters and volt-meters, illustrative of this type, have two-coil systems correspondingto the primary and secondary windings, respectively, of a… … Fig. 39. Interior of Portable Induction AmmeterCourtesy of Westinghouse Electric and Manufacturing Company ings produces the effect of a rotating field. Li the Westinghousewattmeter of the same type the rotating field is produced by passingcurrents which differ in phase through two sets of coils in…
Electrical engineering
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