Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1989-09-29
1991-05-21
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250394, 2503361, G01T 116
Patent
active
050177885
ABSTRACT:
An improved apparatus for detecting radioactive contamination in garments. The apparatus includes a pair of radiation detectors spaced along a conveyor path. The conveyor system conveys the garments in a compressed condition and the garments are biased toward each of the detectors as they are conveyed therepast. A housing is provided with an air filtering system such that the conveyors are enclosed in a ventilated structure and the spread of contaminants accumulating within the housing is prevented. Preferably the conveyors include a thin, open grid arrangement which is strong, non-stick and includes an electrically conductive material which dissipates static charges. The detectors are gas-flow proportional and may be operated at a voltage optimized for sensing alpha particles. The detectors may also include plural zones some of which are operated at a voltage optimized for sensing alpha particles while others are operated at a voltage optimized for sensing beta particles.
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"Automated Conveyor Monitor for Laundry, Model ACM-L" by Eberline, a subsidiary of Thermo Instrument Systems, Inc.
"Automated Laundry Monitor" by Bicron Corporation, Including drawing.
"Stop Hand-Frisking Laundry!" by National Nuclear Corporation, dated 8/3/87.
INS Automated Laundry Monitor, published by the INS Corporation.
"Ludlum Model 329-1 Laundry Monitor" by Ludlum Measurements, Inc.
Humphrey Martin D.
Johnson Alfred N.
Dunn Drew A.
Howell Janice A.
Stevens W. S.
Westinghouse Electric Corp.
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