Composite diaphragm for speaker

Details Composite diaphragm for speaker Composite diaphragm for speaker

1977-11-03

1980-08-05

Schafer, Richard E.

Stock material or miscellaneous articles

All metal or with adjacent metals

Foil or filament smaller than 6 mils

181168, 181170, 428615, 428621, 428627, 428649, 428650, 428651, 428660, H04R 712

Patent

active

042162718

ABSTRACT:
A composite diaphragm for a speaker comprises a boron layer formed on a metal foil such as titanium foil, in which a layer of a low melting point metal such as aluminum or magnesium is interposed between the metal foil and the boron layer to provide high rigidity, high elasticity and high bonding strength between the metal foil and the boron layer.

REFERENCES:
patent: 3936277 (1976-02-01), Jakway
patent: 4135601 (1979-01-01), Tsukagoshi et al.
patent: 4153483 (1979-05-01), Holzl
Ishiwatari et al., "The Boron Dome Diaphragm for Loud-Speakers", Audio Eng. Soc. Preprint, 1976.

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