Discharge lamp of the short arc type and a light source...

Details Discharge lamp of the short arc type and a light source... Discharge lamp of the short arc type and a light source...

2008-12-11

2011-10-25

Ton, Toan (Department: 2889)

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

C313S035000, C362S294000

Reexamination Certificate

active

08044559

ABSTRACT:
A discharge lamp of the short arc type has a bulb with an arc tube and sealing tubes extending at opposite sides of the arc tube and which contains a discharge gas and a pair of opposed electrodes supported on lead pins which protrude from the outer end of the sealing tubes, the lead pins being affixed to graded glass in the sealing tube. A cooling fin surrounds the outer surface of one of the sealing tubes; and is formed of a pair of plate-shaped bodies each of which has a curved portion that contacts an outer surface of the sealing tube a strip-shaped portion extending radially from each of opposite edges of the curved portion. The strip-shaped portions of the plate-shaped bodies positionally overlap, and cooling openings are formed in the strip-shaped portions of only one of the plate-shaped bodies. Preferably, a gap is formed between the plate-shaped bodies.

REFERENCES:
patent: 4970431 (1990-11-01), Vegter et al.
patent: 2004/0052027 (2004-03-01), Stewart et al.
patent: 2004/0095765 (2004-05-01), Hataoka et al.
patent: 2006/0170318 (2006-08-01), Morimoto et al.
patent: 2007/0013281 (2007-01-01), Miyasu et al.

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