Radiant energy – Fluent material containment – support or transfer means – With irradiating source or radiating fluent material
Patent
1982-03-03
1984-08-07
Howell, Janice A.
Radiant energy
Fluent material containment, support or transfer means
With irradiating source or radiating fluent material
250435, G01N 2185
Patent
active
044645740
ABSTRACT:
Sampling devices for detecting particulate contaminants, particularly radioactive particulate contaminants, in a gaseous medium, such as air. The devices use filters comprising a filter membrane sandwiched between two pieces of plastic material having holes exposing the filter membrane to the gaseous medium. Each filter is moved between a sampling position at which the filter is exposed to the gaseous medium and a measurement position at which the amount of particulate material collected by the filter can be measured. In the measurement position, a gas-tight seal may be formed with the plastic surrounding the filter medium so that the chamber holding the filter may be evacuated for measurement of radioactive particles. The filter may be moved linearly or rotationally. The detector may comprise a detector of radioactive particles.
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Fallow Charles W.
Hannaher Constantine
Hoffman Martin P.
Howell Janice A.
Pylon Electronic Development Co., Ltd.
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