Improvements in or relating to oscillating crystal transducer systems
OwnerJames Patrick Corbettinventor
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Abstract
A fluid pressure transducer comprises a chamber; one or more matched, plate-like crystals within the chamber; electrical means for exciting each of the crystals and means for transmitting forces originating from fluid pressures on two diaphragms located on the chamber to the crystal or crystals so as to produce a change in the resonant frequency of the crystal or crystals. This change is a measure of the difference in fluid pressures applied to the two diaphragms. SP This application is a continuation-in-part of my copending application Ser. No. 499,489 filed Oct. 22, 1974, now U.S. Pat. No. 4,020,448 issued Apr. 26, 1977. The specification and drawings of that prior application are hereby incorporated into this application by reference.
Claims13
A fluid pressure transducer comprising;
- a chamber;
- two matched plate-like piezo-crystals disposed within the chamber;
- electrical means for exciting each of the crystals;
- two diaphragms situated on the chamber;
- means for transmitting forces originating from fluid pressures on the diaphragms to the edges of at least one of the crystals.
A fluid pressure transducer comprising
- a chamber;
- two matched plate-like piezo-crystals disposed within the chamber;
- electrical means for exciting each of the crystals;
- two diaphragms situated on the chamber;
- means for transmitting forces originating from fluid pressures on the diaphragms to one edge of each of the respective crystals the alternative edge in each case being supported by a member attached to the transducer housing.
The fluid pressure transducer comprising;
- a chamber;
- two matched plate-like piezo-electric crystals disposed within the chamber;
- electrical means for exciting each of the crystals;
- two diaphragms situated on the chamber;
- a member engaging one edge of each crystal and joining the two diaphragms;
- a pre-load spring engaging the other edge of one of the crystals;
- the other edge of the second crystal being secured to the housing;
Dependencies are inferred from the claim text.