Measuring and testing – Sampler – sample handling – etc. – With constituent separation
Patent
1979-11-29
1981-07-21
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
With constituent separation
G01N 124
Patent
active
042791561
ABSTRACT:
A particle collector and fractionator having a 360.degree., omnidirectional gas slit is disclosed herein. The collector and fractionator generally comprise a top and a bottom fractionating member, each of which has a set of concentric corrugations which are complementary to the other set. The collector also includes at least one spacer bracket for mounting and spacing the concentric corrugations of the top fractionating member over the concentric corrugations of the bottom member in complementary relationship, and forming an annular, concentrically corrugated gas flow path therebetween which is circumscribed by a 360.degree. gas slit. Particles are collected and fractionated in the valley portions of the concentric corrugations of the top and bottom members whenever particle laden gas flows from any direction into the concentrically corrugated gas flow path, and out through a centrally disposed gas withdrawal means in the bottom fractionating member. The minimum aerodynamic size of the particles collected and fractionated may be selected by adjusting the spacer brackets to vary the cross sectional area of the gas flow path, which in turn increases or decreases the velocity of a stream of particle laden gas flowing through the path.
REFERENCES:
patent: 2538116 (1951-01-01), May
patent: 3092583 (1963-06-01), Wolff et al.
patent: 3741001 (1973-06-01), Fletcher
Swisher S. Clement
The United States of America as represented by the Administrator
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