Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1976-05-20
1977-09-20
Queisser, Richard C.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73398R, G01N 2902
Patent
active
040488462
ABSTRACT:
Apparatus responsive to the pressure of a fluid contained in or surrounding a stiff but resilient hollow body comprises a stiff, but resilient ring mounted concentric with the body by means of four equi-spaced radially extending stiff struts. Electromagnetic means is provided for exciting natural vibrations of the ring at a resonance frequency, which will be dependent upon the pressure of the fluid in the body. Means is provided for measuring the frequency of vibration, enabling the pressure of the fluid to be determined, e.g. from a pressure-frequency calibration curve for the apparatus.
REFERENCES:
patent: 2518348 (1950-08-01), Mason
patent: 3021711 (1962-02-01), Arvidson
patent: 3411344 (1968-11-01), Lloyd
patent: 3585843 (1971-06-01), Stansfeld
patent: 3626749 (1971-12-01), Abbotts
patent: 3911726 (1975-10-01), Georgiev
Bell & Howell Limited
Myers Richard L.
Queisser Richard C.
Roskos Joseph W.
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