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:
Dec. 25, 1984
Filed:
Jul. 18, 1983
Applicant:
Inventors:
B Rama Rao, Lexington, MA (US);
Kenneth W Robbins, Wilmington, MA (US);
Assignee:
Sperry Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7329 / ; 7330 / ; 324 / ;
Abstract
An apparatus and method for measuring the height of a liquid above a reference level in which short pulses of subnanosecond duration are coupled to a dual-mode transmission line immersed in a liquid to propagate thereon in a plurality of modes. A surface wave propagating on the outer conductor is reflected from the surface of the liquid, and coaxial-mode propagating within the transmission line is reflected from the reference level. These reflected pulses propagate back along the transmission line, coupled to a receiver for detection, the detected pulses processed to determine the liquid height above a reference level.