Measuring and testing – Gas analysis – Gas chromatography
Patent
1977-04-04
1978-04-11
Queisser, Richard C.
Measuring and testing
Gas analysis
Gas chromatography
23254R, G01N 3106
Patent
active
040832279
ABSTRACT:
A hydrocarbon vapor analyzer for direct measurement of the percentage by volume of hydrocarbon vapor is a portable device utilizing two substantially identical vertically disposed graduated cylinders or burettes in which are mounted slidable and adjustable pistons for varying volumetric conditions and measuring changes in volumetric conditions of vapor mixtures of air and hydrocarbon being analyzed therein. One of the graduated cylinders defines a chamber for receiving the sample vapor mixture to be analyzed and the other provides a means for measuring the sample after it is transferred to the second burette through a device for absorbing the hydrocarbon vapor from the vapor mixture to be analyzed. The sample receiving burette has an operatively associated manifolding system which includes, an inlet valve for controlling the flow of the sample mixture of vapor to be analyzed to the sample receiving graduated cylinder, and a transfer valve for passing the vapor sample to be analyzed through the absorber for removing the hydrocarbon vapors to the graduated cylinder for measuring the net volume of hydrocarbon vapor absorbed from the sample mixture of vapor being analyzed. The respective pistons are individually slidable and adjustable by a suitable actuating device and can be set for simultaneous movement to permit controlled transfer of the sample mixture of vapor during operation of the instrument in accordance with prescribed analytical procedures for determining the percentage of hydrocarbon vapor present in the sample mixture being analyzed.
REFERENCES:
patent: 1455263 (1923-05-01), Oberfell
patent: 2147607 (1939-02-01), McMillan et al.
patent: 2601272 (1952-06-01), Frost, Jr.
Beauchamp John P.
Bobis Daniel H.
Edwards Engineering Corporation
Queisser Richard C.
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