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:
Sep. 06, 1983
Filed:
Jun. 04, 1981
Applicant:
Inventor:
Richard Paglia, Carlisle, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
1791 / ;
Abstract
Method and apparatus for significantly reducing the size and cost of an electroacoustical transducer. The transducer assembly includes a backplate with a grooved electrically conductive surface and a spring whose center portion supports the center portion of said backplate. The vibratile diaphragm of said transducer cooperatively engages said grooved backplate surface and the periphery of said diaphragm is bonded to a peripheral extension of said spring while said spring is being compressed under a predetermined amount of spring-flexing force.