Device capable of being submerged and including an acoustic tran

Details Device capable of being submerged and including an acoustic tran Device capable of being submerged and including an acoustic tran

1998-08-06

2000-01-11

Miska, Vit

Horology: time measuring systems or devices

Chronological

With significant casing or mounting support structure

368250, 368255, 368276, G04B 3700, G04C 2100, G04C 2116

Patent

active

060143479

ABSTRACT:
A case (2) in which an acoustic transducer (22) is mounted so as to communicate in a watertight manner with the exterior of the case (2) via acoustic energy.
The transducer (22) is attached to a membrane (17) separating it in a watertight manner from an inlet cavity (10, 11) which is arranged in the case (2) and is in direct communication with the exterior. The membrane (17) is resiliently applied by its periphery onto a rest surface (12) arranged around the cavity separating the latter in a watertight manner from a deformation chamber (13) situated on the side of the membrane (17) opposite to the inlet cavity while being in communication with the interior of the case. The bottom (13a) of the deformation chamber (13) forms a support surface for said membrane (17) when external static pressure greater than a predetermined value is applied thereto.

REFERENCES:
patent: 4298973 (1981-11-01), Saito
Patent Abstracts of Japan, vol. 4, No. 51, (p-007) Apr. 17, 1980, & JP 55 020464 A (Seiko Instr & Electronics Ltd)., Feb. 13, 1980. Abstract.
Patent Abstracts of Japan, vol. 8, No. 58, (p-261) Mar. 16, 1984 & JP 58 206998 A (Daini Seikosha KK). Dec. 2, 1983. Abstract.

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