Radiant energy – Inspection of solids or liquids by charged particles – Including a radioactive source
Patent
1990-05-02
1991-06-04
Hannaher, Constantine
Radiant energy
Inspection of solids or liquids by charged particles
Including a radioactive source
G01B 1502, G01N 2300
Patent
active
050216554
ABSTRACT:
An apparatus for measuring the thickness of a coating on a work piece includes a table for receiving and positioning the coated work piece and beta-ray backscatter measuring instrument for determining the thickness of the coating on the work piece. An air gauge measures accurately the position of the surface of the work piece and causes the measuring detector instrument to be positioned a predetermined distance above the surface of the work piece. The air gauge includes an orifice having a known positional relationship with respect to the beta-ray measuring instrument. The air gauge positions the orifice a known distance above a particular location on the surface of the work piece. The apparatus then positions the beta-ray measuring instrument over that particular location on the work piece, at the predetermined distance above the surface.
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B. C. Ames Co.-Accuflow Air Gaging, Catalog 87AG (1987).
Weismuller Thomas P.
Younger Charles R.
Arthur David J.
Hamann H. Fredrick
Hannaher Constantine
Montanye George A.
Rockwell International Corporation
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