Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1975-01-29
1977-03-01
Goldstein, Herbert
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73 675R, 176 19LD, G01L 900, G01N 2902
Patent
active
040096165
ABSTRACT:
A non-destructive acoustic method for measuring gas pressure in a hermetically sealed enclosure. In accordance with the method, an acoustic signal is generated and transmitted through the gas medium within the enclosure. The acoustic impedance mismatch between the enclosure and the gas medium is dependent upon the pressure of the gas and correspondingly affects the transmissivity of the acoustic signal. The signal is received after traversing a given travel path through the gas and converted into a corresponding electrical output calibrated against a standard to provide a direct measure of the pressure of the gas within the enclosure. In the preferred arrangement, the enclosure is acoustically damped to substantially dissipate acoustic energy traveling within the enclosure walls.
REFERENCES:
patent: 2527208 (1950-10-01), Berry et al.
patent: 2938386 (1960-05-01), Anderson et al.
patent: 3019656 (1962-02-01), Millar
patent: 3204458 (1965-09-01), Gillen
patent: 3350271 (1967-10-01), Maidment
patent: 3357243 (1967-12-01), Woodcock
patent: 3823068 (1974-07-01), Worlton et al.
Abeles D. C.
Goldstein Herbert
Westinghouse Electric Corporation
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