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:
Feb. 21, 1978
Filed:
Jun. 10, 1976
Applicant:
Inventors:
Claude C Sims, Orlando, FL (US);
Thomas H Ensign, Winter Park, FL (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
340-9 ; 310322 ; 310334 ; 340 10 ; 340 14 ;
Abstract
An acoustic transducer for simultaneously producing broadband sound sources n the conventional and overtone resonance modes. Two sets of ceramic and aluminum discs are fixed adjacent each other with the ceramic discs of each set facing one another across an air gap. By selection of respective relative diameters and thicknesses for the ceramic and aluminum discs, the transducer exhibits dual resonance output signals when excited by an input voltage.