Electrode system with a current feedthrough through a...

Details Electrode system with a current feedthrough through a... Electrode system with a current feedthrough through a...

2005-03-25

2009-10-13

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S623000, C313S624000, C313S625000, C445S026000, C445S027000

Reexamination Certificate

active

07602115

ABSTRACT:
An electrode system with a current feedthrough through a ceramic discharge vessel is provided which, on one hand, increases the visible output of lamps and, on the other hand, allows smaller dimensions. For this purpose, the current feedthrough is made of rhenium or a platinum-group metal. In this way, improved color reproduction is also achievable. In preferred embodiments: (a) the current feedthrough is made of rhenium or a rhenium alloy or a platinum-group metal or a platinum-group metal alloy and the current feedthrough is brazed flush in the discharge vessel, (b) the discharge vessel has no shaft, and/or (3) the current feedthrough is in the form of one or more joined spheres.

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