X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1985-12-30
1990-12-25
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Absorption
2503591, 2503581, G01N 2302
Patent
active
049809024
ABSTRACT:
A system for measuring the open space between, and the ratio of open space to cord diameter, of cord reinforced tire fabric. A collimated x-ray source and detector scan across the tire fabric as it is calendered providing a signal corresponding to each edge of a cord. A counter counting at a constant rate provides a time interval measurement of each open space, and also of the corresponding open space plus cord, as the x-ray source and detector scans the fabric. The quotient of the two time intervals determined is proportional to the fractional open space at a particular location in the fabric. An alarm is provided to indicate when the open space is outside predetermined limits.
REFERENCES:
patent: 3497693 (1970-02-01), Duftschmid et al.
patent: 3727054 (1973-04-01), Herrick
patent: 3757122 (1973-09-01), Bossen et al.
patent: 3854046 (1974-12-01), Wood
patent: 3889121 (1975-06-01), Bossen
patent: 3914607 (1975-10-01), Cho et al.
patent: 4165461 (1979-08-01), Ishijima
patent: 4389136 (1983-06-01), Fehrenbach
patent: 4706267 (1987-11-01), Chase et al.
Commonly assigned related co-pending U.S. Patent Application No. 06/804,384 to Chase, et al. with claims as most recently amended.
Chase Lee M.
Hegland Philip M.
Church Craig E.
Freeman John C.
Measurex Corporation
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