Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1975-06-16
1977-03-29
Demeo, Palmer C.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313184, 313222, 313271, 313318, H01K 120, H01K 140, H01K 150
Patent
active
040151581
ABSTRACT:
A long life tungsten halogen lamp comprising a fused silica envelope containing a coiled tungsten filament connected across inleads sealed therein which include inner portions of molybdenum wire. The molybdenum wire has been treated to increase its ductility and reduce the concentration of impurities at the surface. The fill gas at a room temperature total pressure of at least 2,000 torr comprises nitrogen, an inert gas and a bromine-bearing component which provides from 1.6 .times. 10.sup.-.sup.8 to 8.0 .times. 10.sup.-.sup.8 gram atoms of bromine per cubic centimeter of envelope volume.
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Danko George K.
Holcomb Richard H.
Roller Robert S.
DeMeo Palmer C.
General Electric Company
Kempton Lawrence R.
Legree Ernest W.
Neuhauser Frank L.
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