High-pressure gas discharge lamp having a seal with a cylindrica

Details High-pressure gas discharge lamp having a seal with a cylindrica High-pressure gas discharge lamp having a seal with a cylindrica

1992-10-05

1995-10-24

O'Shea, Sandra L.

Electric lamp and discharge devices

Electrode and shield structures

With lead wire or connector

313623, H01J 500

Patent

active

054612772

ABSTRACT:
A high pressure discharge lamp includes a sealed lamp vessel (1) having a quartz glass wall (2) enclosing a discharge space (3). Metal foils (4) are embedded in the wall, connected to electrode rods (6), and have a circumferential coating (7) of quartz glass at least adjacent the metal foil. The coating has a firm adherence to the rod. It may comprise in its boundary (7') adjoining the rod/coating interface an addition, e.g. selected from a group comprising thorium, yttrium, hafnium. Alternatively, rhenium may be present at the surface of the rod, giving an interlocking configuration of the rod and its coating. Due to a strong adherence of the quartz glass to the rod upon completing a seal, and due to large differences in expansion coefficients, the coating is torn off from the wall so as to be mechanically loose from the wall. The coating prevents premature failure of the lamp caused by leakage.

REFERENCES:
patent: 3868528 (1975-02-01), Lake et al.
patent: 4282395 (1981-08-01), Hagemann
patent: 4594529 (1986-06-01), de Vrijer
patent: 4749905 (1988-06-01), Mori et al.
patent: 5077505 (1991-12-01), Ekkelboom et al.

Affiliated with

Also associated with

Rating

High-pressure gas discharge lamp having a seal with a cylindrica does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High-pressure gas discharge lamp having a seal with a cylindrica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-pressure gas discharge lamp having a seal with a cylindrica will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1888797