Device for detecting the angle of rotation

Details Device for detecting the angle of rotation Device for detecting the angle of rotation

1995-09-26

1997-08-19

Bennett, G. Bradley

Geometrical instruments

Miscellaneous

Light direction

33 1PT, G01B 730

Patent

active

056575440

ABSTRACT:
A rotational angle detecting device includes a rotary shaft 1 having an annular projection 1c formed therein so as to extend radially outwardly therefrom, and a housing 2 rotatably supporting the rotary shaft 1. A plurality of rolling contact bearings 6 each having inner and outer races are mounted on the rotary shaft 1 under a pre-loaded condition so as to sandwich the annular projection 1 c between the respective inner races of the rolling contact bearings 6. The assembly is rotatably received inside the housing 2 to permit the rotary shaft 1 to be rotatable about a longitudinal axis thereof. A resistor element 12 is disposed on an inner surface of a housing lid 3 in concentric relation to the longitudinal axis of the rotary shaft 1. An electroconductive brush 5 is secured to an end face of the rotary shaft 1 for rotation together with the rotary shaft 1 and held in sliding contact with the resistor element 12.

REFERENCES:
patent: 4369578 (1983-01-01), Ernst
patent: 4625411 (1986-12-01), Kashiwagi et al.
patent: 5218769 (1993-06-01), Tranchon

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