Device for detecting rotating speed of thin shape motor

Measuring and testing – Test stand – For engine

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G01M 1500

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active

046062238

ABSTRACT:
A device for detecting rotating speed of a thin shape motor including a vertical shaft rotatably supported on a base plate, a rotor of a planar shape secured to the vertical shaft in a spaced apart relation from the base plate, and a stator provided downwardly from the rotor on the base plate, comprises a rotatable disc of a diameter smaller than that of the rotor secured to the vertical shaft and having speed detecting indices on a peripheral surface thereof, and a luminous element and a light-receiving element provided outwardly of the rotor. A light-projecting optical fiber and a light-receiving optical fiber are further provided to extend along the base plate such that one end of the light-projecting optical fiber is located to oppose the luminous element, while one end of the light-receiving optical fiber is located to oppose the light-receiving element, and that the other ends of the two optical fibers are placed in opposition to the peripheral surface of the rotatable disc.

REFERENCES:
patent: 3023335 (1962-02-01), Burr
patent: 3570116 (1971-03-01), Armstrong et al.
patent: 3575129 (1971-04-01), Sullivan
patent: 4321600 (1982-03-01), Blaser
patent: 4327362 (1982-04-01), Hoss

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