Boron coated diaphragm for use in a loud speaker

Details Boron coated diaphragm for use in a loud speaker Boron coated diaphragm for use in a loud speaker

1978-04-03

1979-01-23

Lesmes, George F.

Acoustics

Diaphragm

Critically defined material or coating

179181R, 181168, 181170, 428 80, 428195, 428457, 428538, G10K 1300, H04R 712

Patent

active

041356012

ABSTRACT:
A diaphragm for use in a loud speaker is constructed of a substrate formed into a diaphragm configuration from a thin plate or a sheet composed of an organic or an inorganic substance, and a coating layer made of boron, or, an alloy of which a major component is boron or a chemical compound of boron, being provided onto at least the surface of said substrate.

REFERENCES:
patent: 3093207 (1963-06-01), Bozak
patent: 3125647 (1964-03-01), Rouy
patent: 3564565 (1971-02-01), Haberecht et al.
patent: 3671306 (1972-06-01), Allen
patent: 3702261 (1972-11-01), Feakes et al.
patent: 3729372 (1973-04-01), Matchen et al.
patent: 3807008 (1974-04-01), Reedy
patent: 3858680 (1975-01-01), Tsuge et al.
patent: 4005235 (1977-01-01), Prochazka

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