Measuring device for use with tubular products

Details Measuring device for use with tubular products Measuring device for use with tubular products

1979-10-04

1981-11-24

Ciarlante, Anthony V.

Measuring and testing

Surface and cutting edge testing

Roughness

73 86, 33178F, G01B 528

Patent

active

043016774

ABSTRACT:
Apparatus for detecting variations in the internal dimensions of a pipe includes a plurality of cantilever members for engaging the internal surface and strain gauges mounted on the cantilever members which are responsive to the flexing of the cantilever members. A Wheatstone bridge is utilized to measure changes in resistance of the strain gauges and hence the amount of flexing of the cantilevers due to undulations in the internal surface. The apparatus is particularly useful in detecting and measuring dents in tubes of nuclear power plant steam generators caused by corrosion of steel support plates.

REFERENCES:
patent: 2656613 (1953-10-01), Goble
patent: 2915830 (1959-12-01), Price
patent: 3010212 (1961-11-01), Kinley
patent: 3024651 (1962-03-01), McGlasson
patent: 3628029 (1971-12-01), Tompkins
patent: 4235020 (1980-11-01), Davis et al.

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