Acoustics – Diaphragm – Mounting or suspension means
Patent
1975-12-10
1976-12-14
Tomsky, Stephen J.
Acoustics
Diaphragm
Mounting or suspension means
181172, G10K 1300, H04R 700
Patent
active
039970230
ABSTRACT:
A loudspeaker comprises a frame, a cone assembly which includes a cone body having an outer periphery spaced away from the frame, and a flexible annular surround connecting the periphery of the cone body to the frame. The surround has an inner peripheral flange secured to the outer periphery of the cone body, an outer peripheral flange secured to the frame, and an arched web between the two flanges and spanning the gap between the cone body and the frame. The radial cross-section of the arched web has a varying radius of curvature with a greater radius at the bases thereof than at the apex. The preferred cross-sectional configuration is a parabola. The arched web decreases in thickness from the bases thereof toward the apex so that the minimum thickness is located at the apex of the arch and the maximum thickness is located at the bases of the arch. The surround is made of a solid resilient material having a durometer of less than about 55, preferably a rubber such as butyl. The surround is made by molding, and can be made in any desired color.
REFERENCES:
patent: 1582473 (1926-04-01), Kay et al.
patent: 2030501 (1936-02-01), Cunningham
patent: 3645356 (1972-02-01), Sotome
patent: 3684052 (1972-08-01), Sotome
patent: 3858680 (1975-01-01), Tsuge et al.
patent: 3862376 (1975-01-01), White
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