Measuring and testing – Fluid pressure gauge – U-tube liquid column
Patent
1979-12-03
1982-10-19
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
U-tube liquid column
G01L 900
Patent
active
043543898
ABSTRACT:
Disclosed is a method and apparatus for measuring and/or continuously recording small pressure differences by means of a novel manometer-like device. Accuracies of plus or minus about 0.05 dynes/square centimeter are achieved by means of a disclosed device which can measure, record, and self-calibrate.
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patent: 3225599 (1965-12-01), Schwien
patent: 3296867 (1967-01-01), Schwien
patent: 3355946 (1967-12-01), Lazell
patent: 3589196 (1971-06-01), Van Dyck et al.
patent: 3611811 (1971-10-01), Lissau
Atlantic Richfield Company
Welsh Stanley M.
Woodiel Donald O.
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