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US 4,302,634 AGranted
Spring force biasing means for a capacitance-type electrostatic transducer
AssigneePolaroid Corporation
InventorRichard Paglia
Life of this patent
Estimating the term…
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.
Claims10
An electrostatic transducer assembly comprising:
- a housing having a hollow interior;
- a vibratile diaphragm extending across said interior of said housing with a peripheral region of said diaphragm maintained in fixed relation to said housing;
- a backplate positioned within said housing;
- and
- means for urging said backplate into cooperative engagement with said diaphragm, said urging means including a biasing member located within said housing adjacent the side of said backplate opposite said diaphragm and extending across the interior of said housing, said member having at least a pair of resilient end sections, each of said end sections having a first portion in engagement with said housing and a second portion in engagement with a peripheral region of said backplate, at least one of said first or second portions being bent away from the other portion in a plane generally normal to said backplate so as to bias said backplate toward said diaphragm.
2 more elements
An electrostatic transducer assembly comprising:
- a housing having a hollow interior;
- a vibratile diaphragm extending across the interior of said housing with a peripheral region of said diaphragm maintained in a fixed position with respect to said housing;
- a backplate movably positioned within said housing;
- and
- means for urging said backplate into engagement with said diaphragm, said means including a resilient member having a plurality of forked portions projecting therefrom with at least one prong of each of said forked positions engaging said housing and with at least one prong of each of said forked portions pressing on a peripheral area of said backplate.
2 more elements
Dependencies are inferred from the claim text.