Internal conductively-heated cathode

Details Internal conductively-heated cathode Internal conductively-heated cathode

2004-08-23

2008-12-30

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

Discharge devices having a thermionic or emissive cathode

C313S341000

Reexamination Certificate

active

07471035

ABSTRACT:
The present invention relates to an internally heated cathode. More specifically, the internally heated cathode that comprises an a cavity structure, where at least a portion of the cavity structure forms an emission material portion, the cavity structure defining a cavity, and a heater disposed within the cavity, providing for an efficient, durable, and long lasting cathode that requires less power.

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