Inner diameter measuring instrument

Details Inner diameter measuring instrument Inner diameter measuring instrument

1982-04-19

1984-03-27

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33147F, 33147K, G01B 512

Patent

active

044385668

ABSTRACT:
An inner diameter measuring instrument wherein the measuring pressure of measuring elements is adjustable from outside and the measuring elements can be retracted by a pair of levers. A spring is confined between a movable member secured to a spindle and an abutting member formed on the outer surface thereof with a tapered surface, and a biasing force of this spring is adjustable by the movement of the movable member due to rotation of a control member mounted to the main body of the measuring instrument. The abutting member is upwardly moved by a pair of levers each provided thereon with a pusher member penetrating through the main body for pushing the abutting member, so that the measuring elements biased in the radial directions of the spindle can be retracted.

REFERENCES:
patent: 2312222 (1943-02-01), Tanner
patent: 2369319 (1945-02-01), Smith
patent: 2566970 (1951-09-01), Swensson
patent: 3995374 (1976-12-01), Fisk
patent: 4045877 (1977-09-01), Rutter
patent: 4288924 (1981-09-01), Mizuno et al.

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