Tube wall thickness measurement apparatus

Details Tube wall thickness measurement apparatus Tube wall thickness measurement apparatus

1985-06-21

1987-01-06

Martin, Jr., William D.

Geometrical instruments

Area integrators

Electrical

33172B, G01B 506

Patent

active

046335900

ABSTRACT:
An apparatus for measuring the thickness of a tube's wall for the tube's entire length and circumference by determining the deviation of the tube wall thickness from the known thickness of a selected standard item. The apparatus comprises a base and a first support member having first and second ends. The first end is connected to the base and the second end is connected to a spherical element. A second support member is connected to the base and spaced apart from the first support member. A positioning element is connected to and movable relative to the second support member. An indicator is connected to the positioning element and is movable to a location proximate the spherical element. The indicator includes a contact ball for first contacting the selected standard item and holding it against the spherical element. The contact ball then contacts the tube when the tube is disposed about the spherical element. The indicator includes a dial having a rotatable needle for indicating the deviation of the tube wall thickness from the thickness of the selected standard item.

REFERENCES:
patent: 1226396 (1917-05-01), Slocomb
patent: 2511276 (1950-06-01), Ljungstrom et al.
patent: 2587774 (1952-03-01), Shack et al.
patent: 2657468 (1953-11-01), Lyons
patent: 2965970 (1960-12-01), Rocheleau
patent: 3507046 (1970-04-01), Smith et al.
patent: 3913234 (1975-10-01), Windle
L. S. Starrett Company, Sixth Edition, Catalog No. 27, pp. 326-327 (1979).

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