Shielded filter

Claim 2

An electrical filter comprising an elongated hollow tube of conductive material, a can member of conductive material, said can member comprising a bottom wall integral with transversely extending continuous sidewalls, said sidewalls defining a free edge relatively widely spaced form said bottom wall, said can member being disposed within said elongated tube with its bottom wall positioned transverse to the axis of said tube and extending completely across said tube at a location between and relatively widely spaced from both opposing ends of said tube, the integral sidewalls of said can member being located closely adjacent to and extending along the interior surface of said tube with the free edge of said sidewalls being positioned closely adjacent one of the opposing ends of said tube at a position remote from said bottom wall location, first electrical filter components located within said can member between said bottom wall and said one end of said tube, second electrical filter components located outside of said can member but within said tube between said bottom wall and the other end of said tube, whereby said bottom wall acts as a shield between said first and second electrical filter components, and means for closing said one end of said tube at a joint located closely adjacent the free edge of said can sidewalls.

Claim 3

The structure of claim 1 including means in said tube for fixing the location of said bottom wall relative to the opposing ends of said tube.

Claim 4

An electrical filter comprising an elongated hollow tube of conductive material, a first can member comprising a bottom wall integral with upstanding sidewalls defining an open top spaced from said bottom wall, said first can member being disposed within said elongated tube with its bottom wall positioned transverse to the axis of said tube at a location between the opposing ends of said tube, the sidewalls of said first can member being located closely adjacent the interior surface of said tube with the open top of said first can member being positioned closely adjacent one of the opposing ends of said tube, a second can member having a bottom wall, integral sidewalls, and an open top, said second can member being disposed within said tube with its open top positioned closeLy adjacent the other end of said tube and with its bottom wall positioned transverse to the axis of said tube at a location axially spaced from the bottom wall of said first can member, first electrical filter components located within said first can member between its bottom wall and said one end of said tube, second electrical filter components located within said second can member between its bottom wall and the other end of said tube, further electrical filter components located within said tube between the spaced bottom walls of said first and second can members, and closure means closing the opposing ends of said tube.

Claim 5

An electrical filter comprising an elongated hollow tube of conductive material, a first can member comprising a bottom wall integral with upstanding sidewalls defining an open top spaced from said bottom wall, said first can member being disposed within said elongated tube with its bottom wall positioned transverse to the axis of said tube at a location between the opposing ends of said tube, the sidewalls of said first can member being located closely adjacent the interior surface of said tube with the open top of said first can member being positioned closely adjacent one of the opposing ends of said tube, a second can member having a bottom wall, integral sidewalls, and an open top, said second can member being disposed within said tube with its open top positioned closeLy adjacent the other end of said tube and with its bottom wall positioned transverse to the axis of said tube at a location axially spaced from the bottom wall of said first can member, first electrical filter components located within said first can member between its bottom wall and said one end of said tube, second electrical filter components located within said second can member between its bottom wall and the other end of said tube, further electrical filter components located within said tube between the spaced bottom walls of said first and second can members, and closure means closing the opposing ends of said tube.

Claim 6

The structure of claim 3 wherein each of said bottom walls includes an aperture, and electrical means extending through said apertures for interconnecting said first, second, and further electrical filter components to one another.

Claim 7

The structure of claim 3 wherein said first electrical filter components include a capacitor, a conductive strap electrically connected to one side of said capacitor, said strap extending at least partially across said first can member in a direction generally parallel to its bottom wall and conductively engaging the sidewalls of said first can member.

Claim 8

The structure of claim 5 wherein said capacitor includes a sleeve of insulating material extending therethrough, and an electrical lead connected to one side of said capacitor and extending through said sleeve for electrical connection to a filter component physically located adjacent the other side of said capacitor.

Claim 9

The structure of claim 3 wherein said further electrical filter component include a capacitor, a conductive strap electrically connected to one side of said capacitor, said strap extending at least partially across said tube in a direction transverse to the axis of said tube and conductively engaging the bottom wall of a can member.

Claim 10

An electrical filter comprising an elongated hollow tube of conductive material, a can member comprising a bottom wall integral with upstanding sidewalls defining an open top spaced from said bottom wall, said can member being disposed within said elongated tube with its bottom wall positioned transverse to the axis of said tube at a location between the opposing ends of said tube, the sidewalls of said can member being located closely adjacent the interior surface of said tube with the open top of said can member being positioned closely adjacent one of the opposing ends of said tube, first electrical filter components located within said can member between said bottom wall and said one end of said tube, second electrical filter components located within said tube between said bottom wall and the other end of said tube, and closure means closing the opposing ends of said tube, said filter components including a capacitor of the extended foil type, an elongated conductive strap attached to one side of said capacitor, said strap including positioning flanges at its opposing ends, and an inductor physically engaging said positioning flanges.

Claim 11

An electrical filter comprising an elongated hollow tube of conductive material, a can member comprising a bottom wall integral with upstanding sidewalls defining an open top spaced from said bottom wall, said can member being disposed within said elongated tube with its bottom wall positioned transverse to the axis of said tube at a location between the opposing ends of said tube, the sidewalls of said can member being located closely adjacent the interior surface of said tube with the open top of said can member being positioned closely adjacent one of the opposing ends of said tube, first electrical filter components located within said can member between said bottom wall and said one end of said tube, second electrical filter components located within said tube between said bottom wall and the other end of said tube, and closure means closing the opposing ends of said tube, said filter components including a capacitor of the extended foil type, an elongated conductive strap attached to one side of said capacitor, said strap including positioning flanges at its opposing ends, and an inductor physically engaging said positioning flanges.

Claim 12

The structure of claim 3 wherein said closure means comprises end caps hermetically sealing the opposing ends of said tube, said end caps including terminals electrically connected to said filter components.

Claim 13

The structure of claim 3 wherein said tube and said can members are each of circular cross section.