Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1991-09-17
1992-05-05
O'Shea, Sandra L.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313634, H01J 1716
Patent
active
051111047
ABSTRACT:
A commercially feasible triple-enveloped metal-halide arc-discharge lamp having a hermetically sealed light-transmissive enclosure surrounding the arc tube and a hermetically sealed light-transmissive outer envelope. There is a vacuum within the enclosure and outside the arc tube. There is a gaseous fill within the outer envelope and outside the enclosure. Preferably, metal frame parts within the outer envelope are electrically isolated from the electrical circuit of the lamp in order to minimize sodium loss from the arc tube and providing superior luminous maintenance. The vacuum enclosure about the arc tube eliminates convective heat loss and redistributes reflected heat back to the arc tube such that arc tube operation is hotter and more nearly isothermal. As a result, lamp performance characteristics are comparable or improved with respect to double-enveloped prior art counterparts. Color temperature is substantially reduced. The enclosure acts as an effective containment device in the rare event of a burst of the arc tube. The gaseous fill within the outer envelope minimizes the implosion hazard. A triple-enveloped lamp in accordance with the invention is particularly well suited for high-wattage applications.
REFERENCES:
patent: 3407327 (1968-10-01), Koury et al.
patent: 3619682 (1971-11-01), Lo et al.
patent: 3662203 (1972-05-01), Kuhl et al.
patent: 4029983 (1977-06-01), Thornton
patent: 4499396 (1985-02-01), Fohl et al.
patent: 4791334 (1988-12-01), Keeffe et al.
patent: 4935668 (1990-06-01), Hansler et al.
patent: 4942330 (1990-07-01), Karlotski et al.
"Electric Discharge Lamps," John J. Waymouth, The M.I.T. Press, 1971, Chapter 10.
GTE Products Corporation
O'Shea Sandra L.
Romanow Joseph S.
LandOfFree
Triple-enveloped metal-halide arc discharge lamp having lower co does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Triple-enveloped metal-halide arc discharge lamp having lower co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Triple-enveloped metal-halide arc discharge lamp having lower co will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1415126