Measuring and testing – Gas content of a liquid or a solid – By vibration
Patent
1976-06-14
1977-10-18
Goldstein, Herbert
Measuring and testing
Gas content of a liquid or a solid
By vibration
73 885R, G01N 2516
Patent
active
040540499
ABSTRACT:
The device employs an electrical transducer for measuring thermal deformation in a specimen with a high degree of resolution. The device basically comprises a link which linearly spans the specimen in the direction and at the location in which the deformation is to be measured, and a displacement sensor with a broad temperature range such as a capacitance-based linear displacement sensor. The link is fixed to the specimen at one end and free at the other end. The link is constructed with negligible thermal expansion such as by selecting a material for the link that has a very low thermal coefficient of expansion. In one embodiment the link is constructed in two different length sections each having a different thermal expansion coefficient with the sections extending in opposite directions to provide an effective or resultant expansion that is negligible with temperature change. In another embodiment part of the sensor is supported by a frame having a higher thermal expansion coefficient than the coefficient of the link which is a single section link.
REFERENCES:
patent: 1638425 (1927-08-01), Whittemore
patent: 2559789 (1951-07-01), Peckham
patent: 2656712 (1953-10-01), Comstock
patent: 2734276 (1956-02-01), Weaver
patent: 2969710 (1961-01-01), Zibritosky et al.
patent: 3680357 (1972-08-01), Closener
patent: 3852672 (1974-12-01), Nelson
Loubser et al. "An Apparatus for Determining the Coefficient of Thermal Expansion of Rocks, Mortar & Concrete" in Magazine of Concrete Res. vol. 24, No. 79, 6/72 pp. 97-100.
Goldstein Herbert
The Boeing Company
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