Gauge for internal threads

Details Gauge for internal threads Gauge for internal threads

1988-05-09

1989-08-15

Haroian, Harry N.

Geometrical instruments

Gauge

Screw thread

G01B 348, G01B 512

Patent

active

048561983

ABSTRACT:
A gauge for measuring an internal thread formed within a passage in a nut or other member, and including two gauge elements having similar external threads adapted to project into the threaded passage along the axis of the internal thread and from opposite ends of the passage to engage opposite ends of the internal thread, and two indicators carried by the gauge elements at locations axially outwardly beyond the opposite ends of the passage and having portions extending externally of the passage to positions at which the rotary setting of one indicator can be read against the rotary setting of the other. At least one of the rotary elements (preferably both) is rotatably adjustable relative to the corresponding gauge element, and releasably lockable in any of different set positions relative thereto as an initial setting of the tool.

REFERENCES:
patent: 1714780 (1929-05-01), Hartness
patent: 1829797 (1931-11-01), Hartness
patent: 1875872 (1932-09-01), Hoke
patent: 1877307 (1932-09-01), Hartness
patent: 1905705 (1933-04-01), Hartness
patent: 2883760 (1959-04-01), Eriksson
patent: 4417402 (1983-11-01), Hattan
Southern Gage Co., "Tri-Roll Thread Comparators", Jun. 1979, pp. 1-12.
MTG, "Internal Gaging", May 1981, pp. 1-12.

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