Electricity: measuring and testing – A material property using electrostatic phenomenon
Patent
1995-05-11
1997-01-07
Wieder, Kenneth A.
Electricity: measuring and testing
A material property using electrostatic phenomenon
324457, G01N 2760
Patent
active
055920969
ABSTRACT:
This electrostatic selector of aerosol particles of an atmosphere has a first (18) and a second (20) parallel, spaced, coaxial conductive disks, between which is established an electric field, an annular slot (22) made in the first disk for communicating with the atmosphere to be examined, a central intake (26) for bringing about a circulation from the periphery of the disks of a stable, centripetal, laminar filtered air flow, an annular or circular opening (28) made in the second disk, a third disk (32) facing the second disk, means for injecting between the second and third disk, from the periphery thereof, a radial, laminar, filtered air flow, a central pipe fixed to the third disk by which the particles having the requisite electrical mobility (or the requisite dimension if the electric charge is known) are brought to the outside of the apparatus.
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Commissariat a l''Energie Atomique
Do Diep
Wieder Kenneth A.
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