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. 05, 1993
Filed:
Apr. 13, 1992
Applicant:
Inventors:
Natan E Parsons, Brookline, MA (US);
Joel S Novak, Sudbury, MA (US);
Assignee:
Recurrent Solutions Limited Partnership, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10K / ; H04R / ;
U.S. Cl.
CPC ...
367140 ; 181157 ; 181168 ; 181171 ; 181173 ; 381 90 ; 381162 ; 381193 ; 381205 ;
Abstract
A sonic transducer (10) includes an elongated diaphragm (12) secured to a base (14) by a clamping member (16). The shapes of the surfaces (26, 30) by which the base (14) and clamping element (16) engage the diaphragm (12) are different at the end regions (28) from what they are in the side regions (32). The result is a more-rigid clamping at the ends than at the sides, which causes the lengthwise and widthwise stiffnesses of the diaphragm to be more nearly equal and thus the sound production from various regions of the diaphragm to be more nearly in phase than they would be if the clamping were uniform.