Gas discharge lamp envelope comprising a barium sulphate protect

Details Gas discharge lamp envelope comprising a barium sulphate protect Gas discharge lamp envelope comprising a barium sulphate protect

1988-04-13

1990-04-10

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313635, H01J 6135

Patent

active

049163590

ABSTRACT:
A protective layer of BaSO.sub.4 or BaSO.sub.4 mixed with SiO.sub.2 is applied in suspension to the inner surface of the glass discharge tube or envelope of a gas discharge lamp of the metal vapour type. The protective layer prevents contact, e.g., of mercury in the discharge chamber with amalgam-forming substances present in the glass surface of the lamp discharge tube. In addition, the crystals of the protective layer re-reflect shortwave ultraviolet radiation back to the layer of luminescent substance, thereby to generate visible light and increasing the efficiency of the lamp. The protective layer results in a marked decrease in the prior art's accepted reduction in the lamp luminance in relation to lamp burning time.

REFERENCES:
patent: 2299720 (1942-10-01), Holman
patent: 2838707 (1958-06-01), Schwing et al.
patent: 3541377 (1970-11-01), Nagy
patent: 3617357 (1971-11-01), Nagy

Affiliated with

Also associated with

Rating

Gas discharge lamp envelope comprising a barium sulphate protect does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gas discharge lamp envelope comprising a barium sulphate protect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas discharge lamp envelope comprising a barium sulphate protect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2300963