Ceramic discharge lamp arc tube seal

Details Ceramic discharge lamp arc tube seal Ceramic discharge lamp arc tube seal

2005-02-15

2005-02-15

Vu, David (Department: 2828)

Electric lamp and discharge devices

Electrode and shield structures

C313S332000, C313S623000

Reexamination Certificate

active

06856079

ABSTRACT:
An arc discharge metal halide lamp having a discharge chamber with visible light permeable walls bounding a discharge region through which walls a pair of electrode assemblies are supported with interior ends thereof positioned in the discharge region spaced apart from one another. These electrode assemblies each also extend through a corresponding capillary tube affixed to the walls to have exterior ends thereof positioned outside the arc discharge chamber. At least one of these electrode assemblies comprises an electrode discharge structure with a discharge region shaft extending into the capillary tube corresponding thereto. A helical coil positioned in part about the discharge region shaft extends outwardly in that corresponding capillary tube to be in direct contact with an interconnection shaft extending outside of that corresponding capillary tube to provide an exterior end of this electrode assembly.

REFERENCES:
patent: 4409517 (1983-10-01), Van Der Sande et al.
patent: 5424609 (1995-06-01), Geven et al.
patent: 5455480 (1995-10-01), Bastian et al.
patent: 6075314 (2000-06-01), Huettinger et al.
patent: 6181065 (2001-01-01), Huettinger et al.
patent: 6392345 (2002-05-01), Niimi et al.
patent: 6414451 (2002-07-01), Baake et al.
patent: 6495959 (2002-12-01), Ikeuchi et al.
patent: 6495960 (2002-12-01), Takeji et al.

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