Tensioned diaphragm mounting for an electroacoustic transducer

Details Tensioned diaphragm mounting for an electroacoustic transducer Tensioned diaphragm mounting for an electroacoustic transducer

1975-02-18

1976-05-25

Claffy, Kathleen H.

Acoustics

Diaphragm

Mounting or suspension means

179111R, H04R 724, H04R 1900

Patent

active

039586626

ABSTRACT:
A transducer in accordance with the present invention includes a cylindrical housing that is open at one end and has an inwardly extending lip at the other end, a disc shaped membrane diaphragm being supported on the lip. An annular insulator rests on the periphery of the diaphragm, and a compressible annular spring member rests, in turn, on the insulator. In addition, a back plate having a central portion for engaging the diaphragm and a perimeter portion for engaging the spring member is positioned with the central portion in juxtaposition with the diaphragm and the perimeter portion resting on the spring member. The central portion extends from the perimeter portion, and the height of the central portion is less than the height of the insulator plus the height of the spring member prior to its being compressed and greater than the height of the insulator plus the final compressed height of the spring member. Means, such as a lock ring threaded into the open end of the housing, are provided to move the back plate toward the diaphragm and thereby compress the spring member.

REFERENCES:
patent: 2086107 (1937-07-01), Wilson
patent: 3663768 (1972-05-01), Madsen et al.
patent: 3814864 (1974-06-01), Victoreen
patent: 3816671 (1974-06-01), Fraim et al.

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