Tube plug weld inspection apparatus

Details Tube plug weld inspection apparatus Tube plug weld inspection apparatus

1979-01-04

1981-06-23

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

356241, 358225, H04N 718

Patent

active

042754143

ABSTRACT:
Apparatus for remote inspection of annular curved ridge welds securing plugs in heat transfer tubes in a nuclear steam generator. Included in such apparatus is a small sized television camera, an annular image transformation lens of greater size than the observed weld for presenting a flattened expanded image of such weld to the camera, a circular array of work-illumination lamps at the input end of the camera, and a hollow cylindrical light conductive member mounted at its one end on the input end of the camera in exposure to the lamps and mounting the image transformation lens on its opposite end for proximity to the annular weld being inspected.

REFERENCES:
patent: 2215900 (1940-09-01), Bitner
patent: 2254962 (1941-09-01), Harris
patent: 2454144 (1948-11-01), Epstein
patent: 2482698 (1949-09-01), Tillyer
patent: 2510521 (1950-06-01), Rinia
patent: 2588414 (1952-03-01), Rosin
patent: 3010366 (1961-11-01), Crawford
patent: 3320359 (1967-05-01), Ikegami
patent: 3669527 (1972-06-01), Fuller
patent: 3958080 (1976-05-01), Schadler

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