Measuring and testing – Gas analysis – Gas chromatography
Patent
1980-08-04
1982-09-14
Howell, Kyle L.
Measuring and testing
Gas analysis
Gas chromatography
73 38, G01N 3108
Patent
active
043488870
ABSTRACT:
An apparatus for determining the effect of dilution and/or diffusion of the gaseous components of a gas flow passing through a gas permeable test object is claimed. The apparatus comprises a source of calibrating gas, a laminar resistance coupled to the source of calibrating gas with the gas flowing through the laminar resistance, and a volumeter is coupled to the laminar resistance for measuring the volume of gas flowing therethrough. The gas from the laminar resistance flows through the test object to a gas concentration measuring device for receiving and for measuring the concentration thereof. A bypass device is provided for bypassing the flow of gas around the test object, and a suction device draws gas from the source to the measuring device.
REFERENCES:
patent: 3115767 (1963-12-01), Tyrrell et al.
patent: 3460374 (1969-08-01), Parks
patent: 4171635 (1979-10-01), Calleson et al.
Muramatsu, M., et al., A Model Study on the Diffusion and Dilution of Low Molecular Weight Gaseous Compounds Through Cigarette Paper During Smoking, In Beitrage zur Tabakforschung, Band 9, Heft 3, pp. 141-146, Oct. 1977.
Kirchner Helmut
Lorenz Hans-Walther
Schumacher Gerd
B.A.T. Cigaretten-Fabriken GmbH
Howell Kyle L.
Roskos Joseph W.
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