High-pressure discharge lamp with precision end seal structure

Details High-pressure discharge lamp with precision end seal structure High-pressure discharge lamp with precision end seal structure

1985-12-04

1988-01-26

Boudreau, Leo H.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313625, 445 43, H01J 6136, H01J 940

Patent

active

047218860

ABSTRACT:
The invention relates to a high-pressure discharge lamp provided with a discharge vessel having a ceramic wall and a ceramic end plug which is arranged therein by means of sintering in a sunken position and in which a current-supply member of a main electrode is arranged in a gas-tight manner by means of a sealing ceramic connection. Outside the discharge space enclosed by the discharge vessel, a ceramic filling piece is arranged, which adjoins with a capillary intermediate space the wall of the discharge vessel, the end plug and the current-supply member. The capillary intermediate space is filled substantially entirely with sealing ceramic. With this construction of the vessel end, the sintered joint between the wall of the discharge vessel and the end plug is completely covered by sealing ceramic and the sealing ceramic is prevented from extending into the discharge space.

REFERENCES:
patent: 3726582 (1973-04-01), Tol et al.
patent: 3892993 (1975-07-01), Timmermans
patent: 4283652 (1971-08-01), Van Herck et al.

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