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:
May. 24, 1977
Filed:
Apr. 27, 1976
Gerard Coussot, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
An elastic surface wave transmitting device comprising a piezoelectric substrate S.sub.1 on which is arranged a transmitting transducer T.sub.E placed on the center of the substrate S.sub.1, and two receiving transducers T.sub.R1 and T.sub.R2 arranged on either side of the transmitting transducer T.sub.E, means (a metallic wafer P.sub.1, for example deposited by evaporation on to the substrate S.sub.1) enabling the waves transmitted by the transmitting transducer T.sub.E towards each of the receiving transducers T.sub.R1 and T.sub.R2 to be phase-shifted so that the waves O.sub.1 and O.sub.2 respectively reflected by these receiving transducers T.sub.R1 and T.sub.R2 cancel one another out at the transmitting transducer T.sub.E.