Sealed container housing a mechanical filter

Details Sealed container housing a mechanical filter Sealed container housing a mechanical filter

1974-12-30

1976-04-27

Clay, Darrell L.

Electricity: conductors and insulators

With fluids or vacuum

Boxes and housings

174 52R, 310 82, 333 71, H05K 506

Patent

active

039536629

ABSTRACT:
A container for a mechanical filter is provided in which the internal pressure is reduced to prevent propagation in the air of sound waves to thereby prevent deterioration of the filter characteristics. A recess with an aperture therethrough is formed in one of the walls of a metal casing which constitutes the container. Further, an adhesive tape-like member is disposed on the surface of the recess in such a manner as to cover the aperture. After the casing has been evacuated through the aperture, hermetic sealing means is provided on the adhesive tape-like member within the recess.

REFERENCES:
patent: 2810889 (1957-10-01), Lundgren
patent: 2838722 (1958-06-01), Watson
patent: 3076153 (1963-01-01), Reickman et al.
patent: 3795831 (1974-05-01), Fujita

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