Apparatus for checking atmospheric pollution due to alpha partic

Details Apparatus for checking atmospheric pollution due to alpha partic Apparatus for checking atmospheric pollution due to alpha partic

1985-04-26

1987-10-13

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250435, 250370, 250504, G01T 102

Patent

active

047000678

ABSTRACT:
Apparatus for checking atmospheric pollution by alpha particle-emitting aerosols includes a filter, a detector positioned facing the filter and a unique grid positioned between the filter and the detector. The grid is constituted by radial plates perpendicular to the filter and the detector extending over the entire distance between the latter and defining cells, each of which is open towards the outside of the space between the filter and the detector.

REFERENCES:
patent: 2497823 (1950-02-01), Molloy
patent: 3922555 (1975-11-01), Chapuis et al.
patent: 4185199 (1980-01-01), Droullard et al.
patent: 4186303 (1980-01-01), Smith et al.
patent: 4253025 (1981-02-01), Fergus
patent: 4385236 (1983-05-01), Hassib et al.
patent: 4442358 (1984-04-01), Kreiner

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