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:
Jan. 31, 1984
Filed:
Nov. 05, 1981
Applicant:
Inventor:
Michael R Bungay, Sudbury, GB;
Assignee:
Lucas Industries Limited, Birmingham, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 / ; 324 / ; 324 / ;
Abstract
An apparatus for providing an indication of a change in the dielectric constant of a fluid comprises a pair of electrodes at least one of which in use is surrounded by the fluid, an oscillator operable to charge and discharge the capacitors formed by the electrodes, the frequency of oscillation of the oscillator being dependent upon the voltage developed across one of the capacitors, and means responsive to the difference in the voltages developed across the capacitors.