Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Patent
1982-12-13
1986-07-08
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
378 53, G01F 2300
Patent
active
045995141
ABSTRACT:
A traveling mat (10) of glass fibers that have been coated with a resinous binder is measured so as to determine quantitatively the mass of binder per unit area of the mat, by directing into the traveling mat gamma rays (26) from a first radiation source (28) comprising americium-241 isotope, also directing into the traveling mat isotopic X-rays (30) from a second radiation source (32) comprising curium-244 isotope, detecting (at 22) the gamma rays from the traveling mat to produce a first response (R.sub.A), detecting (at 24) the isotopic X-rays from the traveling mat to produce a second response (R.sub.C) and forming (at 48) a combination of the first and second responses so as to produce a third response (B) that is indicative of the mass of the binder and substantially independent of the mass of the glass fibers.
REFERENCES:
patent: 3087061 (1963-04-01), Dukes et al.
patent: 3092724 (1963-06-01), Foster
patent: 3417244 (1968-12-01), Kramer
patent: 3525863 (1970-08-01), Constantine
patent: 3626183 (1971-12-01), Berry
patent: 3809903 (1974-05-01), Cho
patent: 3889121 (1975-06-01), Bossen
patent: 4037104 (1977-07-01), Allport
patent: 4090074 (1978-05-01), Watt
patent: 4363968 (1982-12-01), McGowan et al.
AccuRay Corporation
Howell Janice A.
Peterson C. Henry
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