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:
Nov. 24, 1981
Filed:
May. 05, 1980
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
Conformity between a cooperatively engaged vibratile diaphragm and backplate of a capacitance-type electrostatic transducer assembly is improved, and unwanted mechanical vibrations in said backplate are substantially reduced, by means of a low cost, easily fabricated spring in engagement with the housing of said transducer assembly that presses on selected peripheral portions of said transducer backplate.