The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1979
Filed:
Nov. 17, 1977
James P Corbett, Santa Barbara, CA (US);
Other;
Abstract
A fluid pessure transducer comprises a plate-like crystal. The pressure gives rise to a force which is applied by two seatings situated by opposing edges of a crystal in a direction generally along the face of the crystal. The change in oscillating frequencies of a part of the crystal provides a measure of the force and hence the fluid pressure. In the past a second matched crystal has been employed to provide compensation for inaccuracy brought about by undesired frequency deviation due to ambient temperature change of the instrument. The present invention consists of a single crystal having on it two oscillating areas simulating the behaviour of the original pair of crystals. The single crystal facilitates manufacture of the device and improves the accuracy of the instrument.