Means for inspecting an annular workpiece

Details Means for inspecting an annular workpiece Means for inspecting an annular workpiece

1978-03-06

1979-02-06

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33174Q, G01B 731, G01B 734

Patent

active

041376412

ABSTRACT:
A method and apparatus for inspecting an annular or ring-like work element to determine if the concentricity and wall thickness of the work element is within prescribed limits. The work is mounted within a rotatable drum so that the outer wall of the work resides in contact against the inner wall of the drum. The drum is rotated about its axis at a speed such that the work is caused to rotate about its own axis of rotation in one point rolling contact with the moving drum surface. An electrical contact point is placed at a prescribed distance from the axis of the drum and is adapted to close a warning circuit in the event the concentricity or wall thickness of the work element is outside of the desired limits.

REFERENCES:
patent: 2689409 (1954-09-01), Fry et al.
patent: 3028676 (1962-04-01), Lauri
patent: 4080741 (1978-03-01), Siddall et al.

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