Abstract:
An electric incandescent lamp with its lead-in wires formed with an integral collar the periphery of which forms a hermetic seal with the lamp envelope. The method of manufacturing the lamp using this lead-in wire whereby the exhausting and filling operations are performed through one end of the envelope.
Abstract:
THE MOUNT STRUCTURE FOR AN ELECTRIC INCANDESCENT LAMP IS MADE BY FIRST BENDING A LENGTH OF ALEAD-IN WIRE INTO A HAIRPIN-SHAPED WIRE PREFORM WITH ITS BIGHT END PREFERABLY OF GREATER SPAN THAN THE ADJACENT LEG PORTIONS, FUSIONSEALING A GLASS BEAD AROUND THE ADJACENT LEG PORTIONS OF THE HAIRPIN-SHAPED WIRE PREFORM TO TIE THEM TOGETHER, AND THEN MOUNTING A FILAMENT ON THE BIGHT PORTION OF THE HAIRPIN-SHAPED WIRE PREFORM AND SEVERING THE BIGHT PORTION AT A REGION BETWEEN ITS CONNECTIONS TO THE FILAMENT TO DIVIDE THE HAIRPIN-SHAPED WIRE PREFORM INTO TWO SEPARATE LEAD-IN WIRES WITH THEIR SEVERED ENDS OUT OF CONTACT WITH ONE ANOTHER. THE BIGHT FORMING BENDS IN THE LEAD-IN WIRES OF THE MOUNT HAVING A CLOSE SLIDING FIT WITH THE INNER WALL OF THE TUBULAR LAMP ENVELOPE TO CENTER THE MOUNT THEREIN.