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. 09, 1983
Filed:
Feb. 25, 1982
Applicant:
Inventor:
James S Johnston, Bognor Regis, GB;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G08C / ; G08C / ; G01L / ;
U.S. Cl.
CPC ...
34087037 ; 34087005 ; 34087016 ; 340626 ; 324 / ; 73718 ; 73724 ; 361283 ; 318662 ;
Abstract
A differential pressure transducer is a body with a pair of opposed sensing chambers bounded by diaphragms and associated surfaces of the body. The surfaces have conducting layers and form capacitors with the metal diaphragms. The chambers are connected together and fitted with a fixed mass of oil. A signal generating circuit produces electrical signals representing the values of the two sensing capacitors which are fed to a computer to calculate the differential pressure independent of temperature.