Convex radius gauge

Details Convex radius gauge Convex radius gauge

1985-02-19

1985-11-26

Little, Willis

Geometrical instruments

Gauge

With support for gauged article

33536, 33172R, G01B 520

Patent

active

045547475

ABSTRACT:
A gauge in the nature of a hand tool determines the radius of a rounded corner disposed between two flat side surfaces on a workpiece. As the gauge is placed in a position to straddle the workpiece, a pair of spaced, perpendicular stops on the gauge engage the flat surfaces of the workpiece to align the latter relative to the gauge. The device also includes a bar which is shiftable along a line bisecting the angle between the flat stops, and an axially shiftable arm is pivotally mounted on one end of the bar. A dial indicator having a work contactor is secured to one end of the arm, and as the work contactor is moved to slidingly traverse the convex surface of the workpiece, the indicator reveals whether the pivotal axis of the work contactor coincides with the center of curvature of the convex surface. Both the arm and the bar are shifted until the pivotal axis coincides with the center of curvature, whereupon the radius of the convex surface may be readily measured by means of a depth micrometer.

REFERENCES:
patent: 447276 (1891-02-01), Brayton
patent: 1032739 (1912-07-01), Caswell
patent: 1516420 (1924-11-01), Comeau
patent: 2066699 (1937-01-01), Skelton
patent: 2733035 (1956-01-01), Rocheleau
patent: 2796671 (1957-06-01), Aller
patent: 2949675 (1960-08-01), McElhose
patent: 3190008 (1965-06-01), Weiss
patent: 3217418 (1965-11-01), Wennerberg
patent: 3492737 (1970-02-01), Swanson
patent: 4326336 (1982-04-01), Hreha

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