Process for producing a diaphragm for acoustic appliances

Details Process for producing a diaphragm for acoustic appliances Process for producing a diaphragm for acoustic appliances

1991-10-02

1993-02-02

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

295277, 29594, 148665, 164 46, B23P 1700

Patent

active

051828464

ABSTRACT:
In production of a beryllium type diaphragm used for acoustic appliances such as speakers and microphones, formation of a crude beryllium plate by means of vacuum deposition is followed by hot cross rolling and hot pressing. Vacuum deposition well reduces production of undesirable impurities such as BeO and hot rolling increases density of the beryllium crystal structure obtained by the preceding vacuum deposition, both for betterment in acoustic and mechanical characteristics of the product such as sound pressure and mechanical strength.

REFERENCES:
patent: 3895671 (1975-07-01), Suzuki
patent: 4847981 (1989-07-01), Suzuki et al.
patent: 5017245 (1991-05-01), Suzuki et al.

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