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US 5,345,144 AGranted
Lamp with internally pressed fuse
AssigneeGTE Products Corporation
InventorsChristopher E. Mahonski, Raymond T. Fleming
Life of this patent
Estimating the term…
Abstract
A press sealed lamp with an internally pressed fuse is disclosed. The filament structure is conveniently formed so the fuse links across a looped section of the initial filament structure. The loop structure provides strength to the fused filament structure prior to sealing. After the lamp is sealed, a portion of the exposed loop is trimmed, thereby limiting the electrical connection to the path through the fuse.
Claims5
A lamp with an internally pressed fuse comprising:
- a) an envelope having an internal surface defining an enclosed volume, and a first press seal;
- and
- b) a filament structure having a filament positioned in the enclosed volume, an inner lead extending from a first end of the filament into the first press seal electrically coupled in series to a fuse pressed in the first press seal, the fuse being electrically coupled in series to a final lead extending from the first press seal to the exterior of the lamp, the filament being further connected through a second filament end to the exterior of the lamp for electrical connection.
A lamp with an internally pressed fuse comprising:
- a) a quartz envelope having an internal surface defining an enclosed volume, and a first press seal;
- and
- b) a filament structure having a filament positioned in the enclosed volume, an inner lead extending from a first end of the filament into the first press seal, electrically coupled in series to a seal foil sealed in the first press seal and electrically connected in series to a fuse pressed in the first press seal, the fuse being electrically connected in series to a final lead extending from the first press seal to the exterior of the lamp, the filament being further connected through a second filament end to the exterior of the lamp for electrical connection.
A lamp with an internally pressed fuse comprising:
- a) an envelope having an internal surface defining an enclosed volume, and a first press seal;
- and
- b) a filament structure having a filament positioned in the enclosed volume, electrically coupled in series to a fuse pressed in the first press seal, the fuse being electrically and mechanically coupled in series to a final lead extending from the first press seal to the exterior of the lamp, the filament being further connected through a second filament end to the exterior of the lamp for electrical connection.
Dependencies are inferred from the claim text.