Measuring and testing – Liquid level or depth gauge – Hydrostatic pressure type
Patent
1976-11-11
1978-05-30
Queisser, Richard C.
Measuring and testing
Liquid level or depth gauge
Hydrostatic pressure type
G01F 2314
Patent
active
040916693
ABSTRACT:
Apparatus suitable for use as a hydrostatic pressure standard comprises a vertically-mounted container charged with a predetermined amount of a liquid having a low-vapor pressure, such as an hydraulic oil, to provide a predetermined pressure head at a port at the lower end of the container. The container is provided at its upper end with a closure in the form of a variable volume device which is so arranged that the pressure in the space within the container above the liquid is maintained substantially equal to the external, e.g. atmospheric pressure. A system for determining the mass of a liquid in a tank and embodying two such pressure standards is also described.
REFERENCES:
patent: 2600324 (1952-06-01), Rappaport
patent: 2696738 (1954-12-01), Lupfer
patent: 2791906 (1957-05-01), Vetter
patent: 3049148 (1962-08-01), Richardson
patent: 3394590 (1968-07-01), Napolitano
patent: 3610042 (1971-10-01), Brosius, Jr.
patent: 3969941 (1976-07-01), Rapp
Fehr Ivor John Martin
Wheable Desmond
Bell & Howell Limited
Myers Richard L.
Queisser Richard C.
Roskos Joseph W.
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