Electric lamp and discharge devices – With gas or vapor – Having particular electrode structure
Reexamination Certificate
2006-05-02
2006-05-02
Santiago, Mariceli (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Having particular electrode structure
C313S620000, C313S638000, C313S570000
Reexamination Certificate
active
07038385
ABSTRACT:
A mercury-free arc tube for a discharge lamp unit including a closed glass bulb and a pair of electrode rods provided in the closed glass bulb so as to be opposite to each other. The closed glass bulb does not contain mercury as in the related art arc tubes, but contains main light emitting metal halide and starting rare gas enclosed in the closed glass bulb. In accordance with necessity, predetermined buffer metal halide in place of mercury may be enclosed to suppress the lowering of the tube voltage to some extent. In addition, the tube current I is increased to make the tube voltage high. The tube current I (unit: A) and the outer diameter d (unit: mm) of each electrode rod are set to have a relationship of 1.0≦I/d≦5.0. As a result, though such an increased tube current is used, the electrode temperature is kept in optimum temperature.
REFERENCES:
patent: 5081396 (1992-01-01), Schneider et al.
patent: 5402037 (1995-03-01), Irisawa et al.
patent: 6294861 (2001-09-01), Mochiduki et al.
patent: 6353289 (2002-03-01), Ishigami et al.
patent: 6639343 (2003-10-01), Takashi et al.
patent: 2002/0158580 (2002-10-01), Uemura et al.
Irisawa Shinichi
Takagaki Michio
Colón German
Koito Manufacturing Co. Ltd.
Santiago Mariceli
Sughrue & Mion, PLLC
LandOfFree
Mercury-free arc tube for discharge lamp unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mercury-free arc tube for discharge lamp unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mercury-free arc tube for discharge lamp unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3548796