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:
Aug. 07, 1979
Filed:
Aug. 22, 1977
Applicant:
Inventor:
John B Waugh, Mountain Lakes, NJ (US);
Assignee:
The Singer Company, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73721 ; 73727 ;
Abstract
A digital piezoresistive pressure transducer is provided wherein a pressure differential causes the resistance of two equal, diffused piezoresistances to change by equal but opposite amounts. The variable resistance of the two piezoresistance elements is utilized to correspondingly vary the time duration of two distinct voltage levels. The ratio of the time duration of the two voltage levels bears a linear relationship to the differential pressure across the transducer that enables the various values of pressure to be determined.