Discharge vessel and high intensity discharge lamp having...

Details Discharge vessel and high intensity discharge lamp having... Discharge vessel and high intensity discharge lamp having...

2010-01-20

2011-12-06

Patel, Vip (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S634000

Reexamination Certificate

active

08072132

ABSTRACT:
A discharge vessel for high intensity discharge lamps is disclosed. The discharge vessel comprises an elongated arc chamber having a longitudinal axis of rotational symmetry. It has a translucent wall made of fused silica glass, or alternatively ceramic material. A pair of electrodes is located at opposite ends of the arc chamber for providing discharge arc. The wall of the arc chamber has at least one inwardly protruding circumferential narrowed portion thereby the arc chamber is divided into convection cells.

REFERENCES:
patent: 4952187 (1990-08-01), Ake
patent: 6015031 (2000-01-01), Dorfschmid et al.
patent: 7034461 (2006-04-01), Brock
patent: 2006/0255742 (2006-11-01), Haacke et al.

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