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. 08, 1992
Filed:
Apr. 22, 1991
Applicant:
Inventor:
Michael J Gill, Milford-on-Sea, GB;
Assignee:
British Gas plc, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7386128 ; 731182 ;
Abstract
A fluid speed measurement device includes a pair of ultrasonic transducers (T1, T2) spaced in a measuring chamber. A transmitter and receiver system is controlled by a microprocessor (100) which generates pulses which periodically invert and these are switched by switches (140, 150) to allow alternate direction of transmission. Reception and detection of signals is effected by blocks (152-168). Time calculation is determined by counter (109) and results are used to calculate flow speed or volume using the microprocessor. A speed increase in the measurement region is effected using a venturi device.