Instrument for measuring internal dimensions

Details Instrument for measuring internal dimensions Instrument for measuring internal dimensions

1982-06-07

1984-05-15

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33147K, 33147N, G01B 512, G01B 712

Patent

active

044479590

ABSTRACT:
An instrument is disclosed for measuring internal dimensions by effecting an absolute measurement of an internal dimension of a workpiece using two measuring elements.
This instrument for measuring internal dimensions has probes of the measuring elements disposed at two points on a plane incorporating the center axis of a positioning member, the forward end portion of which has a tapered surface, and the probes are adapted to abut against the inner wall surface of the workpiece which is guided by the tapered surface of the positioning member, whereby a distance between the two probes in the aforesaid abutting state is detected by a displacement detecting device, thereby measuring the internal dimension of the workpiece.

REFERENCES:
patent: 1048073 (1912-12-01), Hirth
patent: 3909950 (1975-10-01), Possati
patent: 4344233 (1982-08-01), Albertazzi
patent: 4355467 (1982-10-01), Albertazzi
patent: 4386467 (1983-06-01), Possati et al.

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