Gas discharge tube

Details Gas discharge tube Gas discharge tube

2005-03-22

2005-03-22

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Having particular electrode structure

C313S292000, C313S581000, C313S609000, C313S610000, C313S243000

Reexamination Certificate

active

06870317

ABSTRACT:
In a gas discharge tube1of the present invention, a focusing electrode portion14and a discharge limiting portion30are electrically insulated, and the discharge limiting portion30comprises a discharge limiting opening31which opposes an arc ball shaping concave portion16. Thus the formation of a discharge path from a cathode portion20to the concave portion16is ensured and a starting discharge can be reliably generated. Further, by means of the discharge limiting opening31which opposes the concave portion16, an arc ball S can be continuously maintained in an appropriate shape even when a lamp is illuminated, and thus the arc ball S can be shaped with stability, thereby stabilizing the luminance and light quantity.

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