Gas mask with voice communication device

Details Gas mask with voice communication device Gas mask with voice communication device

1985-09-09

1988-04-12

Coven, Edward M.

Surgery

Respiratory method or device

Means for transmitting, or facilitating, voice communication...

A62B 1808

Patent

active

047367407

ABSTRACT:
A face mask carries a voice communication device including a circular housing having voice transmitting openings and an annular seat which receives a flexible film diaphragm. The diaphragm is clamped to the seat by an inner circular member which has voice transmitting openings surrounding a socket for receiving a plug-in microphone. The housing receives an outer circular shield member which also has voice transmitting openings and defines a socket for receiving a plug on a microphone cord. Electrical conductor wires extend from the microphone socket through a passage around the diaphragm to the cord socket. A sealant material is injected into the passage and into an annular chamber which is defined between the housing and the inner microphone support member and receives a peripheral edge portion of the diaphragm.

REFERENCES:
patent: 2123196 (1938-01-01), Millard
patent: 2950360 (1960-08-01), Duncan
patent: 3064089 (1962-11-01), Ward
patent: 3174129 (1965-03-01), Laughlen et al.
patent: 3180333 (1965-04-01), Lewis
patent: 3210723 (1965-10-01), Martelli et al.
patent: 3218687 (1965-11-01), Brock et al.
patent: 3540442 (1970-11-01), Holloway
patent: 3622791 (1971-11-01), Bernard

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