Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Reexamination Certificate
2006-08-08
2006-08-08
Philogene, Haissa (Department: 2828)
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
C313S047000, C313S492000, C313S493000, C315S248000
Reexamination Certificate
active
07088033
ABSTRACT:
An electrodeless lamp includes a bulbous lamp envelope enclosing an inert gas and a vaporizable metal fill, the lamp envelope having a reentrant cavity and an envelope bottom, an electromagnetic coupler positioned within the reentrant cavity, and a thermal shield positioned in proximity to the envelope bottom and configured to increase the temperature of the envelope bottom. By increasing the temperature of the envelope bottom, a cold spot is prevented. As a result, light output at low temperatures is comparable to light output at room temperature.
REFERENCES:
patent: 5952784 (1999-09-01), Witting
patent: 6081070 (2000-06-01), Popov et al.
patent: 6548965 (2003-04-01), Maya et al.
patent: 6555954 (2003-04-01), Chandler et al.
patent: 6605889 (2003-08-01), Anami et al.
patent: 6768248 (2004-07-01), Chandler et al.
patent: 2002/0067129 (2002-06-01), Chamberlain et al.
patent: 1050897 (2000-11-01), None
Chandler Robert T.
Maya Jakob
Popov Oleg
Matsushita Electric & Works Ltd.
Philogene Haissa
Wolf Greenfield & Sacks P.C.
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