Gas discharge tube

Details Gas discharge tube Gas discharge tube

2007-10-30

2007-10-30

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Having baffle, partition, or constricting means affecting...

C313S610000, C313S611000

Reexamination Certificate

active

10544465

ABSTRACT:
A gas discharge tube10of the present invention generates an electric discharge between an anode part24and a cathode part52disposed inside a sealed container12in which gas has been sealed. The gas discharge tube10includes an electric discharge path restricting part28which is cylindrical and disposed between the anode part and the cathode part, and which has a throughhole46for narrowing an electric discharge path between the anode part and the cathode part; and a supporting part30which supports the electric discharge path restricting part and which is electric insulating. The electric discharge path restricting part is provided at its tip portion with a projecting part44which is cylindrical and projects toward the cathode part side. Letting the outer diameter and height of the projecting part44be “D” and “H,” respectively, then D/H is in the range of 0.5 to 2.0. With this structure, it is possible to generate an intense electric field in the vicinity of the tip of the projecting part. This can decrease a startup voltage, thereby ensuring the generation of an electric discharge.

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