Portable coating thickness measuring device

Details Portable coating thickness measuring device Portable coating thickness measuring device

1981-03-23

1984-01-03

Willis, Davis L.

Radiant energy

Inspection of solids or liquids by charged particles

Including a radioactive source

2503581, G01N 2300

Patent

active

044244452

ABSTRACT:
A portable device for measuring coating thickness incorporating a radioactive isotope source and a detector. The device is capable of being readily moved from place to place to measure the thickness of thin film coatings applied to various types of substrates, and incorporates spring means for bringing the isotope source holder into intimate contact with the area to be measured and for holding it in that position. The device also includes a locating system whereby a cross-hair or other image is projected onto the surface of the coating the thickness of which is to be measured, at the point where the source holder would contact the coating surface, permitting extremely accurate locating of the device with respect to the area being measured to thereby facilitate the measuring operation and to permit it to be done in an accurate, speedy, and efficient manner.

REFERENCES:
patent: 3529158 (1970-09-01), Joffe et al.
patent: 3720833 (1971-05-01), Hay
patent: 3767931 (1973-10-01), Williams

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