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US 4,278,910 AGranted
High pressure arc discharge lamp having concave shaped outer jacket
AssigneeGTE Products Corporation
InventorsWilliam M. Keeffe, David R. Brown
Life of this patent
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Abstract
A high pressure arc discharge lamp comprises an elongated arc tube disposed substantially axially within a concave shaped outer jacket.
Claims1
In a high pressure arc discharge lamp of the type comprising an elongated arc tube having electrodes at its ends and disposed substantially axially within a glass outer jacket, the improvement which comprises the portion of the outer jacket surrounding the arc tube having a concave shape longer than the internal length of the arc tube, the pressure in the arc tube during normal operation being greater than one atmosphere.
Dependencies are inferred from the claim text.