Underwater communications device

Details Underwater communications device Underwater communications device

1978-01-12

1980-01-15

Tomsky, Stephen J.

Acoustics

Diaphragm

Particular shape

46 88, 46182, 12820119, 179 1UW, 181 18, 181126, 181174, G10K 1300, A62B 700, A63H 306

Patent

active

041834224

ABSTRACT:
A communications device for use under water by a human speaker. A tubular base member has a mouthpiece located at one open end thereof and an inflatable air bag mounted about another open end thereof. In use, the speaker places the mouthpiece around his mouth to form an air seal therebetween and blows into the air bag to partially inflate it. When so inflated, the speaker talks into the device with voiced sounds being transmitted to the surrounding water through suitable transmitting means attached to the base member, preferably the air bag itself. During talking, the air bag receives and returns the air used by the speaker, thereby effectively preventing the escape of air bubbles from the device which otherwise interfere with communications. The air bag is preferably an elongated, flexible balloon which can be stretched into an extended position when speaking into it under water.

REFERENCES:
patent: 1556356 (1925-10-01), Russo
patent: 1595441 (1926-08-01), Zenger
patent: 1730532 (1929-10-01), Robbins
patent: 2099871 (1937-11-01), Stern
patent: 2844212 (1958-07-01), Hogan et al.
patent: 3210723 (1965-10-01), Martelli et al.

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