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. 23, 1988
Filed:
Sep. 30, 1987
Applicant:
Inventor:
Leonard M Weinstein, Newport News, VA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7330 / ; 7329 / ;
Abstract
A method and apparatus to measure the thickness of liquid 12 on a surface 14 independent of liquid conductivity. Two pairs of round, corrosion resistant wires, 18 and 20, are mounted in an insulating material 16 such that the cross-sectional area of each wire is flush with and normal to the surface 14. The resistance between each pair of wires 18 and 20 is measured using two AC resistance measuring circuits 22 and 24 wherein the ratio of the outputs of the two resistance measuring circuits is indicative of the thickness of the liquid 12 on the surface 14.