| 摘要 |
342,245. Synchronous movements. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Artzt, M. ; 12, Riverside, Scotia, and Serrell, R. ; 1012, Wendell Avenue, Schenectady, both in New York, U.S.A.) July 2, 1930, No. 20090. Convention date, July 16, 1929. [Class 40 (iii).] In an electric synchronous movement, a generator 19, coupled to a synchronous motor 16, produces impulses, which vary in frequency with the speed of the motor and are heterodyned with received synchronizing impulses, and the heterodyned currents are supplied to the motor through a rectifier 15 and an amplifier 17.
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