Method of making arc tubes

Details Method of making arc tubes Method of making arc tubes

2005-02-22

2005-02-22

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

C445S022000, C445S043000, C313S634000

Reexamination Certificate

active

06857926

ABSTRACT:
The present invention is directed to methods of making arc tubes for high intensity discharge lamps. The bottom portion of the light emitting chamber of the arc tubes is flattened in an area between the electrodes to reduce the distance between the bottom wall of the arc tube and the arc, and to increase the surface area of the pool of condensed halides during operation of a metal halide lamp. The flattened bottom of the arc tubes may be generally planar, slightly arcuate longitudinally and/or transversely, or slightly v-shaped longitudinally and/or transversely. The top portion of the arc tube conforms generally to the shape of the arc during operation of the lamp.

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