Diaphragm for loud speaker

Details Diaphragm for loud speaker Diaphragm for loud speaker

1974-12-04

1976-03-30

Tomsky, Stephen J.

Acoustics

Diaphragm

Critically defined material or coating

181169, 252 81, 428422, G10K 1300, H04R 700

Patent

active

039468321

ABSTRACT:
A diaphragm for a loud speaker is manufactured by impregnating a diaphragm blank made of natural or man-made fibers or formed by molding a synthetic resin, with a water-soluble inorganic flame retarder, and thereafter with an aqueous solution of a fluorine containing water repellent and oil repellent agent, and then by heating and molding into a speaker diaphragm.

REFERENCES:
patent: 3717218 (1973-02-01), Shiga et al.
patent: 3729434 (1973-04-01), Todd
patent: 3740264 (1973-06-01), Lynch, Jr. et al.
patent: 3770493 (1973-11-01), Gilbert
patent: 3790403 (1974-02-01), Ribbans
patent: 3811933 (1974-05-01), Uffner et al.

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