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:
Oct. 18, 1988
Filed:
Oct. 22, 1984
Applicant:
Inventor:
Georges Grall, Le Conquet, FR;
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S / ; G01S / ;
U.S. Cl.
CPC ...
367 88 ; 367104 ; 367120 ;
Abstract
A sonar transducer comprising a stack of an even number of antennae with identical linear networks. The stack is driven by a reciprocating rotary movement of low amplitude, with the antennae alternately emitting and receiving with each half wavelength of the rotary movement. The emitting antennae as well as the receiving antennae are mutually staggered by an angle equal to the angle of rotation of the assembly. The assembly of receiving antennae are staggered with respect to the assembly of emitting antennae by an angle equal to the phase delay of an emission lobe with respect to the corresponding reception lobe.