Measuring and testing – Liquid level or depth gauge – Hydrostatic pressure type
Patent
1978-10-02
1980-04-08
Swisher, S. Clement
Measuring and testing
Liquid level or depth gauge
Hydrostatic pressure type
73740, G01F 2316, G01L 704
Patent
active
041966236
ABSTRACT:
A depth gauge, of the type having a dial with a graduated scale over which an indicator needle is movable by a manometer unit housed in a capsule filled with liquid which communicates ambient pressure to a pressure-sensitive element of the manometer, in which there are provided calibration means for adjusting the pressure within the capsule with respect to the external ambient pressure in order to adjust the needle setting to zero immediately prior to use. The capsule may have one or two flexible walls and the calibration means include a screw threaded element, which may be part of a casing for the capsule or may be screwed into a part of this casing, which engages the resiliently flexible wall and causes flexure of it one way or the other when screwed in one direction or the other, to increase or reduce the pressure in the liquid filling the capsule with respect to the external ambient pressure.
REFERENCES:
patent: 3203244 (1965-08-01), Alinari
patent: 3651693 (1972-03-01), Alinari
patent: 3693446 (1972-09-01), MacNeil
patent: 3712138 (1973-01-01), Alinari
patent: 3837225 (1974-09-01), Alinari
patent: 3868853 (1975-03-01), Alinari
patent: 3869916 (1975-03-01), Ojima
patent: 4050314 (1977-09-01), Longhetto
patent: 4052899 (1977-10-01), Longhetto
Corr Denis E.
Swisher S. Clement
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