Method of operating an arc discharge lamp and a lamp in...

Details Method of operating an arc discharge lamp and a lamp in... Method of operating an arc discharge lamp and a lamp in...

2008-04-22

2008-04-22

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With temperature modifier

Envelope with condensing chamber or surface

C313S634000

Reexamination Certificate

active

07362041

ABSTRACT:
A method of operating an arc discharge lamp and a lamp in which a light transmissive envelope encloses electrode tips, a salt and a fill that includes iodine, and in which after turning the lamp off, a first part of the light transmissive envelope is locally cooled relative to other parts of the light transmissive envelope to provide a condensation site for the iodine that is spaced from the electrode tips, the first part of the light transmissive envelope being where a salt reservoir forms and where the salt is cooled by the local cooling. The local cooling may be provided by an indentation in an outer sleeve around the light transmissive envelope, where the indentation contacts the first part to provide a heat sink.

REFERENCES:
patent: 4959588 (1990-09-01), Vida et al.
patent: 6580200 (2003-06-01), Fukuyo et al.
patent: 0 481 702 (1992-04-01), None

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