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:
Apr. 18, 1978
Filed:
Jun. 13, 1977
Richard Paglia, Carlisle, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
An electroacoustical transducer assembly of the type including a housing having a cylindrical side portion and a flanged end, a diaphragm having an insulative layer and an electrically conductive layer and having the periphery of said diaphragm in a fixed position with respect to said flanged end of said housing, a backplate having an electrically conductive surface and having said conductive surface in contact with said insulative layer of said diaphragm, is provided with a leaf spring having its end in cooperative interlocking engagement with said cylindrical side portion of said housing and having its intermediate portion resiliently pressing on said backplate.