Low wattage double filament tungsten-halogen lamp

Details Low wattage double filament tungsten-halogen lamp Low wattage double filament tungsten-halogen lamp

H - Electricity

01

K

240/147, 313/153

H01K 1/14 (2006.01) H01K 1/46 (2006.01) H01K 9/08 (2006.01)

Patent

CA 1261308

-18- LOW WATTAGE DOUBLE FILAMENT TUNGSTEN-HALOGEN LAMP ABSTRACT A low wattage tungsten-halogen lamp with an improved filament construction comprising a pair of selectively activated filament, each having a plurality of coil turns, being intercoupled by a relatively short intermediate member. Preferably, both of the filaments and the intermediate member are formed from a single wire. The spacing between turns of each filament is greater about the central portion of the filament than at the opposed end portions thereof, thereby enhancing visible radiation. Xenon gas, at a pressure of fifteen atmospheres, is preferably used as the inert gas fill for the lamp due to its low thermal conductivity.

483660

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