Radiant energy – Inspection of solids or liquids by charged particles – Including a radioactive source
Patent
1985-04-16
1987-11-03
Fields, Carolyn E.
Radiant energy
Inspection of solids or liquids by charged particles
Including a radioactive source
250304, 250435, G01N 2308
Patent
active
047045280
ABSTRACT:
A device of improved type for the separation of airborne particles by grain size is described.
The principle characteristic of the present invention lies in the fact that it comprises: a first base body in which is formed a first cavity on the edge of which rests a plate on which is deposited a filter; two second bodies, one inside the other, in such a way as to define between them an annular channel in which is ducted filtered air and communicating with the said first cavity through a second cylindrical cavity defined by the lower surface of a base wall of the said inner second body and the upper surface of the said filter; and an annular nozzle located in the said channel and operable to eject into it a quantity of particle-bearing air in such a way that the particles of dust present in this are deposited on the said filter.
REFERENCES:
patent: 3854321 (1974-12-01), Dahneke
patent: 3952207 (1976-04-01), Leschonski et al.
patent: 4213852 (1980-07-01), Etkin
patent: 4298836 (1981-11-01), Groves et al.
patent: 4606232 (1986-08-01), Prodi
Behr Omri M.
Fields Carolyn E.
Hanig Richard E.
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