Moulded speech transmitter

Details Moulded speech transmitter Moulded speech transmitter

1988-08-12

1990-04-10

Burr, Edgar S.

Surgery

Respiratory method or device

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

12820616, A62B 1808

Patent

active

049150995

ABSTRACT:
A speech transmitter for use in gas masks and the like comprises a body member having a central, circular recess in one end thereof and a marginal rim surrounding the recess, a cover member having a complementary central, circular recess in one end thereof and a marginal rim surrounding the recess, the cover member marginal rim being lockingly engageable with the body member marginal rim so as to form an unitary assembly in which the body recess and the cover recess are in coaxially aligned, face-to-face relation and define a membrane chamber, the marginal rims having mating surfaces adapted to secure and radially tension a membrane therebetween; and a membrane having a marginal edge interposed between the mating surfaces and a main body portion disposed within the membrane chamber.

REFERENCES:
patent: 1762695 (1930-06-01), Monro
patent: 2038267 (1936-04-01), Bullard
patent: 2845927 (1958-08-01), Hill
patent: 3035574 (1962-05-01), Lytle et al.
patent: 4088461 (1978-05-01), Brauer
patent: 4756308 (1988-07-01), Ryback

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