Arc discharge tube end seal

H - Electricity – 01 – J

Patent

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H01J 61/36 (2006.01) H01J 9/26 (2006.01)

Patent

CA 1143779

14 48,426 ABSTRACT OF THE DISCLOSURE An improved arc tube end seal and the method of forming that seal in a high pressure sodium discharge lamp is disclosed. The method includes precoating the refrac- tory metal end cap with a slurry of a mixture of refrac- tory metal powder and powdered metallic silicon and baking the end cap prior to accomplishing the bonding of the end cap to the arc tube with a conventional sealing frit.

350501

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