Tungsten-fluorine lamp with native retained oxygen therein and m

Details Tungsten-fluorine lamp with native retained oxygen therein and m Tungsten-fluorine lamp with native retained oxygen therein and m

1976-03-17

1977-01-25

Demeo, Palmer C.

Electric lamp and discharge devices

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

For plural electrodes of discharge device

316 20, H01J 9395, H01K 150

Patent

active

040053245

ABSTRACT:
A tungsten fluorine lamp is manufactured by a process including the steps of forming a glass bulb and tungsten filament-lead set to have a controlled content of native oxygen thereon; locating and sealing the tungsten filament and lead set in the bulb and thereafter by a simplified three-step process of evacuation, gas fill and bulb tubulation tip seal step forming a completed lamp assembly; and wherein the completed lamp assembly includes a gas fill comprising an inert component at six atmospheres and a fluorinated hydrocarbon component of only carbon, bromine and fluorine with a range of 3.2 .times. 10.sup.-.sup.7 to 8 .times. 10.sup.-.sup.7 gram atoms of carbon, 2.1 .times. 10.sup.-.sup.6 to 5.2 .times. 10.sup.-.sup.6 gram atoms of bromine, and 1.5 .times. 10.sup.-.sup.6 to 3.8 .times. 10.sup.-.sup.6 gram atoms of fluorine and an oxygen content (evolved from the aforesaid native oxygen) of 1.3 .times. 10.sup.-.sup.6 to 3.3 .times. 10.sup.-.sup.6 gram atoms (all per cc of lamp assembly gas volume) thereby to produce a controlled equimolar relationship of fluorine and oxygen for stable tungsten fluorine oxygen cycle operation.

REFERENCES:
patent: 3619701 (1971-11-01), Sugano et al.
patent: 3783328 (1974-01-01), Neumann

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