Discharge bulb for vehicle

Details Discharge bulb for vehicle Discharge bulb for vehicle

2011-08-23

2011-08-23

Patel, Nimeshkumar D (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S631000

Reexamination Certificate

active

08004195

ABSTRACT:
A discharge bulb and an arc tube are provided. The discharge bulb includes an arc tube main body having a discharge arc chamber, in which two discharge electrodes are disposed to oppose to each other; a tube portion disposed at each end portion of the arc tube main body, each of the tube portions being in communication with the discharge arc chamber and holding one of the discharge electrodes, wherein a wall for forming the discharge arc chamber has a taper portion whose diameter is reduced gradually from a cylinder portion of the arc tube main body in a center area to the tube portion of the arc tube main body, and an inner diameter Di of the cylinder portion is about 1.0 mm to about 2.5 mm, and a projection length Le of the discharge electrode into the discharge arc chamber is about 1.5 mm to about 2.5 mm.

REFERENCES:
patent: 2367579 (1945-01-01), Henry
patent: 5144201 (1992-09-01), Graham et al.
patent: 5359255 (1994-10-01), Kawai et al.
patent: 2003/0062839 (2003-04-01), Takagaki et al.
patent: 2005/0007020 (2005-01-01), Tsuda et al.
patent: 2006/0273723 (2006-12-01), Stockwald et al.
patent: 2004-362978 (2004-12-01), None

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