Metric gauge

Geometrical instruments – Area integrators – Electrical

Patent

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Details

33178B, 33199R, G01B 334

Patent

active

041388208

ABSTRACT:
A metric gauge including a planar body having formed therein a plurality of varying sized sockets suitable for measuring wrench size, screw size, and nut size. A scale with offset index shoulder is also provided to measure bolt and screw length.
Each of the sockets is hexagonally or otherwise formed at the planar body to receive a bolt head or nut therein to precisely measure wrench size. A seat or shoulder for the bolt head or nut is formed below the planar surface at each socket to rest the bolt head or the nut thereon when sizing.
Each of the sockets is downwardly formed to a hollow cylindrical configuration of a varying diameters for bolt diameter measuring purposes. Each socket terminates downwardly in a cylindrical bottom of known outside diameter to receive thereon a nut for gauging the nut diameter. The scale edge of the planar surface is impressed with a plurality of graduations which may be in millimeters or inches which extend from the index shoulder.

REFERENCES:
patent: D147743 (1947-10-01), Cambron
patent: 1246536 (1917-11-01), Bristol
patent: 2364529 (1944-05-01), Hill
patent: 2528431 (1950-10-01), Greenberg
patent: 2604702 (1952-07-01), Collins
patent: 2896333 (1959-07-01), Kivela
patent: 3406461 (1968-10-01), Gunderson
Plastics World, p. 29, Styrene Nut, Bolt Gauge, Jan. 1953.

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