Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1990-08-20
1991-08-13
Yusko, Donald J.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313112, 313634, 313635, H01J 6100, H01J 6110
Patent
active
050399128
ABSTRACT:
The high-pressure discharge lamp has around the discharge vessel an inner sheath of quartz glass and an outer sheath of aluminosilicate glass. An interference filter reflecting UV radiation is present between the discharge vessel and the outer sheath. The light emitted by the lamp thus satisfies the conventional standards regarding radiation for lamps operated in open luminaires.
REFERENCES:
patent: 4281274 (1981-07-01), Bechard et al.
patent: 4916353 (1990-04-01), Danko et al.
van Vliet Johannes A. J. M.
Verbeek Willibrordus G. C.
Patel N. D.
U.S. Philips Corporation
Wieghaus Brian J.
Yusko Donald J.
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