Halogen-cycle type incandescent lamp

Details Halogen-cycle type incandescent lamp Halogen-cycle type incandescent lamp

1977-12-05

1979-03-20

Smith, Alfred E.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For filament

313221, 313222, 313223, 313276, 313279, H01K 118, H01K 150

Patent

active

041456300

ABSTRACT:
The planar multi-coil filament of a high-wattage halogen-cycle incandescent lamp is suspended within the envelope by a mount assembly having support rods that are fastened to the lead-in conductors, the ends of the filament and the insulating bridge members by mechanical means rather than metal-to-metal welds. The mechanical junctures are effected by providing a coiled portion on one of the components and then crimping or hot-clamping it around the inserted part of the other component. The expense and quality control problems encountered with tungsten-to-tungsten and molybdenum-to-tungsten welds in the prior art halogen-cycle lamps are thus eliminated. Lamp cost is further reduced by fabricating the envelope from a selected hard glass and, in the case of lamps having large planar filaments, distortion of the filament coiled sections is prevented by modifying the mount structure to provide a "floating bridge" action.

REFERENCES:
patent: 2140977 (1938-12-01), Allen
patent: 3644776 (1972-02-01), DeCaro
patent: 3648094 (1972-03-01), DeCaro et al.
patent: 3727091 (1973-04-01), DeCaro
patent: 3760217 (1973-09-01), Martin et al.
patent: 3986067 (1976-10-01), De Fraeye
patent: 4023060 (1977-05-01), Pike et al.

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