Ceramic lamp end closure and inlead structure

Details Ceramic lamp end closure and inlead structure Ceramic lamp end closure and inlead structure

1985-01-14

1989-09-19

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

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

313318, 313565, 313639, H01J 1718

Patent

active

048684570

ABSTRACT:
The life and performance of high pressure sodium vapor lamps using double wire ceramic seals and no exhaust tube is improved by an end closure and inlead structure which prevents condensation of sodium-mercury amalgam on sealing frit. One end of the arc tube has a plug portion which forms an integral part of the alumina tube without any sealing frit or glass intervening between portions. The plug portion includes a pedestal portion which projects inwardly from the outer region which is joined to the tube. The pedestal defines with the tube wall a ring chamber in which excess amalgam collects out of contact with any sealing frit. The other end of the tube is conventionally sealed by using sealing frit to cement an alumina plug but it is designed to run hotter to prevent condensation of amalgam at that end.

REFERENCES:
patent: 3753019 (1973-08-01), Hellman
patent: 3892993 (1975-07-01), Timmermans
patent: 4065691 (1977-12-01), McVey
patent: 4342938 (1982-08-01), Strok
patent: 4459509 (1984-07-01), Csapody et al.

Affiliated with

Also associated with

Rating

Ceramic lamp end closure and inlead structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ceramic lamp end closure and inlead structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramic lamp end closure and inlead structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-370579