Abstract: A prefocused tungsten-halogen lamp including a vitreous envelope having a press-seal at one end thereof for receiving and supporting lead-in wires that in turn support a filament disposed in the envelope. The press-seal is received in an all ceramic base with a close fit with the sidewalls of the base, while leaving a void space under the press-seal that is filled with a sealing cement preferably injected into the void space through a hole in the ceramic base.

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.

Abstract: A tungsten-halogen lamp having a tubular envelope of quartz or high silica glass has a press-seal at one end which is reduced in width by the removal of right-angled sections from opposite lower corners of the press. The lamp further includes a ceramic base having a slot with closed ends for accommodating the reduced width portion of the press-seal.