Discharge lamp exhibiting reduced thermal stress and method...

Details Discharge lamp exhibiting reduced thermal stress and method... Discharge lamp exhibiting reduced thermal stress and method...

H - Electricity

01

J

H01J 61/06 (2006.01) H01J 9/02 (2006.01) H01J 61/22 (2006.01) H01J 61/36 (2006.01)

Patent

CA 2652330

A lamp (100) comprises an outer envelope (120) having first and second electrical lead- ins (140, 160) sealed into a base (180) of the envelope (120). A ceramic arc tube (200) is operatively mounted within the envelope (120), the arc tube (200) having at least one electrode (220) therein. A tubular, niobium feed-through (240) is connected to the at least one electrode (220) and sealed to the ceramic body (120) at a joint (260) that can comprise a glass frit (260a). A stainless steel rod (280) is electrically connected between the electrical lead-in (140) and the tubular niobium feed-through (240), the stainless steel rod (280) being the only electrical connection between the lead-in (140) and the niobium feed-through (240).

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