Title :
Speed indicator and frequency meter
Author_Institution :
Research Department, Westinghouse Elec. & Mfg. Co., East Pittsburgh, Pa.
Abstract :
The design of a simple mechanical speed indicator, consisting of a rotating cup and a ball placed inside of the cup, is described and discussed. This speed indicator can be built to give precise indication through a range of ± 2 per cent of a given speed. The order of precision in reading is about 1/10 of 1 per cent. When driven positively by a synchronous motor, it can be used as an accurate frequency meter.
Journal_Title :
A.I.E.E., Journal of the
DOI :
10.1109/JAIEE.1929.6536468
