Adjustable three-point thread measuring device

Details Adjustable three-point thread measuring device Adjustable three-point thread measuring device

1990-01-09

1990-12-04

Shoap, Allan N.

Geometrical instruments

Gauge

Screw thread

33199B, 33783, G01B 340

Patent

active

049743279

ABSTRACT:
A thread gaging device has three thread gage rollers mounted 120 degrees apart from each other. Two horizontal arms extend outward from the base. One of the rollers mounts to one arm and the other two rollers mount to the other arm. The two rollers on the one arm can slide horizontally relative to each other to select the positions. Also, the two rollers can be repositioned vertically relative to the other roller to a selected position. The front of the rollers is pivotal relative to the base. An indicator will measure the amount of pivotal movement to gage a threaded fastener inserted between the rollers.

REFERENCES:
patent: 427455 (1889-10-01), Greenslade
patent: 1423339 (1922-07-01), Ledell
patent: 1464938 (1923-08-01), Jordan
patent: 2566356 (1951-09-01), Niper
patent: 2730808 (1956-01-01), Johnson
patent: 2842862 (1958-07-01), Johnson
patent: 3052035 (1962-09-01), Shuster
patent: 3277578 (1966-10-01), Johnson et al.
patent: 3879854 (1975-04-01), Johnson
patent: 4202109 (1980-05-01), Schasteen
Mercury Gage Company Instruction Manual.
L. S. Starrett Company, 121 Crescent St., Athol, MS, 01331.

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