Abstract: A method of manufacturing a miniature tipless halogen lamp having a diameter of 1.0 to 4.0 mm, in which an assembly of a pair of lead wires, a bead welded to the lead wires and a filament connected to the lead wires by pressing flat and crimping the inner ends of the lead wires, the assembly is put in a lamp bulb in place to form an unfinished assembly of the components of the miniature tipless halogen lamp, a plurality of such unfinished assemblies are placed in an apparatus including an integral and airtight combination of a holagen gas introducing sealed box and a heat-sealing box, the lamp bulbs of the unfinished assemblies are sealed by being heated with a heat-sealing carbon plate at a position corresponding to the bead, and then unnecessary portions of the lamp bulbs are cut off to complete the miniature tipless halogen lamps.

Abstract: A lamp bulb has a closed lens-shaped head received in a recess in a bulb holder jig and an open end held by a heating carbon jig. A bead supporting a pair of lead wires with a filament connected thereto is disposed in the open end of the bulb, with the lead wires being supported on a lead wire holder. The jigs and holder are housed in a chamber in which a vacuum is developed. A gas to be filled in the bulb is introduced into the chamber under a desired pressure irrespective of atmospheric pressure. Then, an electric current is passed through the heating carbon jig to heat the latter for fusing the open end of the bulb and the bead, and at the same time the closed end of the bulb is cooled by the bulb holder jig which is supplied with a coolant liquid. After the bulb and the bead have been fused together, the electric current flowing through the heating carbon jig is cut off to stop the heating of the heating carbon jig. Then, the chamber is removed, and the completed lamp is taken out.

Abstract: A lamp bulb has a closed lens-shaped head received in a recess in a bulb holder jig and an open end held by a heating carbon jig. A bead supporting a pair of lead wires with a filament connected thereto is disposed in the open end of the bulb, with the lead wires being supported on a lead wire holder. The jigs and holder are housed in a chamber in which a vacuum is developed. A gas to be filled in the bulb is introduced into the chamber under a desired pressure irrespective of atmospheric pressure. Then, an electric current is passed through the heating carbon jig to heat the latter for fusing the open end of the bulb and the bead, and at the same time the closed end of the bulb is cooled by the bulb holder jig which is supplied with a coolant liquid. After the bulb and the bead have been fused together, the electric current flowing through the heating carbon jig is cut off to stop the heating of the heating carbon jig. Then, the chamber is removed, and the completed lamp is taken out.