Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 719
R. The instrument illustrated and de-scribed in the following pages has beenin use in the laboratory of the GeneralElectric Company at Schenectady,since early in 1896, and is, I think, the simplest form of apparatus yet sug-gested for determining wave forms in alternating currents. The General… … Fig. 4. This device consists of a synchronous motor intended to run in synchro-nism with the machine under test. On the shaft of the motor is placed acontact device similar to the contact device usually placed directly on theshaft of the generator. By the use of a synchronous motor, the device…
Electrical engineering
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