Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1987-01-20
1988-01-19
DeMeo, Palmer C.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313113, 313572, 313579, 313643, 445 3, 445 18, H01K 128, H01K 150, H01J 942
Patent
active
047206527
ABSTRACT:
A sealed beam lamp having an outer envelope defining a gas-tight enclosure filled with an inert nonreactive gas at a pressure in the range of 5 to 50 Torrs, and an illuminating burner capsule mounted within the enclosure. The integrity of the gas-tight enclosure as well as the pressure of the gas is verified by creating a predetermined electrical potential within the enclosure to form a glow discharge in the gas if the gas pressure is within a predetermined range indicating the lamp is serviceable and an arc discharge if the gas pressure is in excess of the range indicating the lamp is defective.
REFERENCES:
patent: 3364378 (1968-01-01), Beesley
patent: 3418512 (1968-12-01), T'Jampens et al.
patent: 4302697 (1981-11-01), Demas et al.
patent: 4463277 (1984-07-01), De Caro
Cooper Industries Inc.
DeMeo Palmer C.
Scott E. E.
Thiele A. R.
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