Sealed casing for electrolytic capacitor with pressure relief vent

Claim 2

A closed casing having a header and an interior chamber for containing a material productive of variable pressures therein, pressure release means comprising an aperture in said header communicating with said interior chamber of the casing, and vent means in said aperture, said vent means being secured to said header and hermetically sealing said aperture and comprising a relatively thin metallic member blocking said aperture with at least a portion of one side thereof exposed directly to said interior chamber of the casing and at least a portion of the opposite side exposed to the atmosphere external to said chamber in said casing, and washer-shaped members secured to said header to seal said metallic member with respect to said aperture and having the openings thereof in registration with said aperture upon greater pressure within said chamber causing the rupture of said sealed metallic member to release the pressure through said openings and said aperture.

Claim 3

An improvement of claim 1 wherein said relatively thin metallic member is made of aluminum material.

Claim 4

The improvement of claim 1 wherein one of said washer-shaped members comprises sealing gasket material for establishing the hermetic seal between said thin metallic member and the header.

Claim 5

The improvement of claim 1 wherein said aperture includes a circular opening in said header and wherein one of said washer-shaped members comprises a metal washer and a second one of said washer-shaped members is of an elastomer material, and in which said thin metallic member is located between said first and second washer-shaped members, the second one of said washer members being in direct engagement with the upper surface of said header and having a central opening in alignment with said circular opening.

Claim 6

An improvement of claim 4 wherein said thin metallic member comprises a thin aluminum disc and said openings of said washer-shaped members are in registration with said aperture in said header whenever said aluminum disc ruptures in response to the interior pressuRe within the casing reaching a predetermined value relative to the atmospheric pressure surrounding the casing.

Claim 7

A closed casing having a header and an interior chamber for containing material productive of variable pressure therein, pressure release means comprising an aperture in said header communicating with said interior chamber of the casing and vent means in said aperture, said vent means being secured to said header and hermetically sealing said aperture and comprising a relatively thin metallic member blocking said aperture with at least a portion of one side thereof exposed directly to said interior chamber of the casing and at least a portion of the opposite side exposed to the atmosphere external to said chamber in said casing, at least first and second washer-shaped members, and means for securing said washer-shaped members within said aperture with said metallic member disposed between the washer-shaped members, one of said washer-shaped members being of an elastomer material providing gas and liquid-tight seal between said washer members and said header, said washer-shaped members having openings in registration with said aperture upon greater pressure within said chamber causing the rupture of said sealed metallic member to release the pressure through said openings and said aperture.

Claim 8

A closed casing having a header and an interior chamber for containing material productive of variable pressure therein, pressure release means comprising an aperture in said header communicating with said interior chamber of the casing and vent means in said aperture, said vent means being secured to said header and hermetically sealing said aperture and comprising a relatively thin metallic member blocking said aperture with at least a portion of one side thereof exposed directly to said interior chamber of the casing and at least a portion of the opposite side exposed to the atmosphere external to said chamber in said casing, at least first and second washer-shaped members, and means for securing said washer-shaped members within said aperture with said metallic member disposed between the washer-shaped members, one of said washer-shaped members being of an elastomer material providing gas and liquid-tight seal between said washer members and said header, said washer-shaped members having openings in registration with said aperture upon greater pressure within said chamber causing the rupture of said sealed metallic member to release the pressure through said openings and said aperture.

Claim 9

The combination of claim 6 wherein said metallic member consists of an aluminum disc.

Claim 10

The combination of claim 6 wherein said metallic member comprises a thin metallic disc.

Claim 11

A combination of claim 6 wherein said aperture includes a first circular recess of a first diameter in said header which connects with said interior chamber and a second circular recess of a different diameter which connects with the atmosphere.

Claim 12

The combination of claim 9 in which the diameter of the second circular recess is smaller than the diameter of the first circular recess.

Claim 13

The combination of claim 9, wherein said first and second washer-shaped members and said metallic member are snugly fit in the larger of said first and second circular recesses and wherein said securing means comprises swaging the end of said larger recess which is opposite to the smaller of said first and second circular recesses.