Tungsten halogen lamp fill mixture comprising a...

Details Tungsten halogen lamp fill mixture comprising a... Tungsten halogen lamp fill mixture comprising a...

H - Electricity

01

K

313/118, 313/172

H01K 1/50 (2006.01)

Patent

CA 1271513

??85-1-060 PATENT ABSTRACT A tungsten halogen lamp is provided that incorporates therein means for reducing the lower operating temperature limit of the halogen cycle operating within the lamp's envelope. In addition, there is provided a halogen lamp fill gas mixture, which is comprised of an inert gas, a halogen or halide and a phorphorus-based compound and a carbon-containing compound that will reduce the lower operating temperature limit and greatly increase the efficiency of the halogen cycle, thereby allowing operation of a tungsten halogen lamp at temperatures about or below 400-500°K. The compounds in the fill gas mixture have a phosphorus-to-carbon mass ratio of about 10:1 to about 1:1. 0196D

510075

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