High pressure mercury lamps and sealing members therefor

Details High pressure mercury lamps and sealing members therefor High pressure mercury lamps and sealing members therefor

2007-11-27

2007-11-27

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

C313S623000, C313S571000, C313S634000

Reexamination Certificate

active

10437382

ABSTRACT:
An object of the invention is to reduce the adverse effects due to a difference of thermal expansion between a conductive sealing member and a light-emitting vessel and to provide a reliable high pressure mercury lamp, even when the lamp is operated at a high pressure. The lamp has a light-emitting vessel16of quartz and having end portions, an electrode member10contained in the vessel16, and a conductive sealing member7A. The sealing member7A is fixed in the end portion and connected to the electrode member10. The conductive member is composed of a sintered body made from silica granules each having a coating of a metal or a metal compound. The sintered body has a conductive network structure made of the metal and having a content of the metal of not higher than 20 volume percent.

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