Measuring and testing – Sampler – sample handling – etc. – With constituent separation
Patent
1983-10-05
1986-05-06
Nozick, Bernard
Measuring and testing
Sampler, sample handling, etc.
With constituent separation
55270, 55317, 55403, 55462, 55524, G01N 116
Patent
active
045863890
ABSTRACT:
A portable aerosol dust spectrometer has an inlet section with a sampler entry having an entry efficiency for airborne dust approximately to that of the human head during inhalation, a clean-up stage to remove particles above 15 .mu.m and a main collection stage which is a cascade impactor. The cascade impactor classifies particles of dust and collects fractions onto a number of collection surfaces. A pump draws air or gas through the apparatus. The apparatus samples air in a similar way to the human body and yields fractions of dust for further study.
REFERENCES:
patent: 2819774 (1958-01-01), Schmidt et al.
patent: 3304783 (1967-02-01), Quigley
patent: 4046593 (1977-09-01), Au et al.
patent: 4274846 (1981-06-01), Smith
patent: 4321822 (1982-03-01), Marple et al.
Ogden et al.-Inhalable Dust Sampler for Measuring the Hazard from Total Airborne Particulate (1978), Annal of Occupational Hygiene, vol. 21, pp. 41-50.
Lundrgren-Aerosol Sampler for Determination of Particle Concentration as a Function of Size & Time, Apr. (1967), vol. 17, No. 4 Journal of Air Pollutron Control Assn., vol. 17, No. 4, pp. 225-228.
Gibson Harold
Lynch Gordon
Mark David
Vincent James H.
Coal Industry (Patents) Limited
Nozick Bernard
Wray James C.
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