公开(公告)号：US3726582A

公开(公告)日：1973-04-10

申请号：US3726582D

申请日：1970-07-20

Applicant: PHILIPS CORP

Inventor： TOL T ,  DE VRIJER B

IPC: C04B37/02 ,  H01J61/36 ,  H01J9/00

CPC classification number: C04B37/025 ,  C04B37/005 ,  C04B2237/10 ,  C04B2237/343 ,  C04B2237/345 ,  C04B2237/62 ,  C04B2237/765 ,  C04B2237/84 ,  C04B2237/88 ,  H01J61/36

Abstract: Method of making an electric gas discharge lamp having an envelope of densely sintered aluminum oxide and employing an alkali metal vapor as the discharge medium. A current lead-in member for an electrode envelope by means of a sealing element of densely sintered aluminum oxide which is sintered to the inner wall of the envelope and is provided with an aperture into which a cylindrical current lead-in supporting at one end an electrode assembly is secured in a gastight manner. The current lead-in member is provided with a cover for the envelope which is sealed to the latter by a sealing glass having a melting point higher than 800*C. and lower than the melting point of the aluminum oxide or the current lead-in member.