Electric lamp unit with improved fuse means
AssigneeGTE Products Corporation
InventorsClyde B. Kohl, Raymond T. Fleming
Life of this patent
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Abstract
An improved fuse means for use within an electric incandescent lamp (e.g., tungsten halogen). The fuse is located within a ceramic base to which the press-sealed end of the envelope is affixed (e.g., cemented). The improved fuse means comprises a first conductive (e.g., nickel) wire segment of rectangular cross-sectional configuration and a second conductive (e.g., nickel) sleeve member crimped about an end portion of the first wire segment and including a flat region which in turn is fixedly secured (e.g., welded) to one of the lead-in wires projecting from the lamp's press-sealed end portion. In an alternative embodiment, a second sleeve member and conductive wire segment is utilized.
Claims9
In an electric lamp unit including an electric lamp having an envelope with a filament therein, at least one sealed end portion, and at least one electrically conductive lead-in wire projecting from said sealed end portion, an insulative base member including at least one electrically conductive pin projecting therefrom, said sealed end portion of said electric lamp being affixed to said base member, and fuse means located substantially within said base member and electrically interconnecting said lead-in wire and conductive pin for preventing the formation of a destructive arc when said filament within said lamp envelope fails, the improvement wherein said fuse means comprises:
- a conductive wire segment;
- and
- a conductive sleeve member crimped about an end portion of said wire segment and including a crimped substantially flat region and a substantially cylindrical region adjacent said flat region, said sleeve member fixedly secured to said lead-in wire at said crimped flat region.
Dependencies are inferred from the claim text.