Gas discharge tube

Details Gas discharge tube Gas discharge tube

2007-09-18

2007-09-18

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

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

C313S611000

Reexamination Certificate

active

10544616

ABSTRACT:
A gas discharge tube10of the present invention generates an electric discharge between an anode part24and a cathode part56disposed inside a sealed container12in which gas has been contained. The gas discharge tube10comprises an electric discharge path restricting part28which is cylindrical and disposed between the anode part and the cathode part, and which has a throughhole42for narrowing an electric discharge path between the anode part and the cathode part; and an electric discharge shielding part50which is disposed to surround the electric discharge path restricting part so as to restrict an electric discharge from the outer peripheral surface of the electric discharge path restricting part to the cathode part, and which is electrically isolated from the electric discharge path restricting part. The end part of the electric discharge path restricting part on the cathode part side projects beyond a surface of the electric discharge shielding part on the cathode side by a predetermined amount “P” of projection. With this structure, a high density electron region is formed exclusively in a part of the throughhole of the electric discharge path restricting part on the cathode side, thereby ensuring the generation of a startup discharge.

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