FILAMENT MOUNT ASSEMBLY FOR MINIATURE INCANDESCENT LAMP, AND METHOD OF MANUFACTURE

摘要

16 48,347 Precise placement of one or more coiled filaments within the envelope of a miniature type incandescent lamp is achieved by positioning the coil legs in end-to-end abutting relationship with the respective lead wires and locking them in such junctured relationship with metal tubes that enclose and are fastened to the abutted end portions of the mated lead wires and coil legs and thus couple the members together. The coupling tubes are first secured to the lead wires so that their open ends provide tubular pockets which receive the coil legs and guide them into the proper mounting position on the lead wires. The open ends of the tubes are then hot-clamped around the associated coil legs, thereby mechanically and electrically joining the members together in operative relationship. The invention is particularly useful in the production of miniature halogen-cycle type incandescent lamps that are employed as compact light sources in sealed-beam automotive lamps which require one or more precisely-mounted filaments.