Refractometer

Details Refractometer Refractometer

1980-05-13

1982-05-04

Gill, James J.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

73386, 356128, 374143, G01D 2102, G01N 2141

Patent

active

043275850

ABSTRACT:
A terrestrial refractometer comprises a gastight enclosure containing a fixed mass of a gas which at least approximates to an ideal gas, at least a part of the enclosure being movable in response to changes in the volume of the gas in accordance with changes in ambient temperature and pressure; constraining means for constraining said movable part so as to maintain the gas at a constant volume; and sensing means for providing a signal related to the force applied to the movable part by the constraining means.

REFERENCES:
patent: 1690455 (1928-11-01), Pawlin
patent: 2270494 (1942-01-01), Barnhart
patent: 2957350 (1960-10-01), Kolb
patent: 3439356 (1969-04-01), Kinzer

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