Geometrical instruments – Distance measuring – Single contact with a work engaging support
Patent
1990-10-17
1992-03-10
Haroian, Harry N.
Geometrical instruments
Distance measuring
Single contact with a work engaging support
324230, G01B 700
Patent
active
050940090
ABSTRACT:
A gauge for measuring the thickness of a coating on a substrate includes a housing, an indicator rod movably positioned within the housing, a magnet mounted on the forward end of the indicator rod, and a spring connected to the rearward end of the indicator rod. The housing can have a slot extending along a portion thereof that communicates with the interior of the housing. According to one embodiment, a measurement scale can be positioned adjacent to and extending along the length of the slot and a plurality of indicating marks can be provided on the rod for permitting the thickness of the coating to be determined. The particular indicating mark that is used for determining the thickness of the coating is dependent upon the orientation of the gauge relative to the force of gravity. According to another aspect of the present invention, the magnet can be fabricated from a combination of at least one light rare earth element and at least one heavy rare earth element.
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PENTEST Coating Thickness Gage (drawing) by Elektro-Physik U.S.A., Inc.
Biddle Instruments, "Price List Bulletin 28," Nov. 1987.
The Snitch Manufacturing Co. advertisement for the SNITCH Body Filler Detector.
Goodman & Co. advertisement for electronic device for detecting plastic filler.
The Genius advertisement for FIFI (filler finder).
Koch Frank J.
Walmer Marlin S.
DeFelsko Corporation
Haroian Harry N.
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