High pressure metal vapor lamp and a transparent polycrystalline

Details High pressure metal vapor lamp and a transparent polycrystalline High pressure metal vapor lamp and a transparent polycrystalline

1979-08-28

1981-04-28

Parrish, John

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, B29D 1100

Patent

active

042645417

ABSTRACT:
A high pressure metal vapor lamp and a transparent polycrystalline alumina tube therefor have been disclosed. The average crystal grain size at ends of the tube is selectively made smaller than that of the middle portion of the tube so that the mechanical strength and the thermal shock resistance of the end portions are made higher than those in the middle portion. Accordingly, the tube hardly causes cracks by a thermal shock when the both ends of the tube are sealed and when the lamp using the tube is switched on and off. Whereas middle portion of the tube has an excellent transparency so that the lamp has a high luminance efficiency.

REFERENCES:
patent: 3026177 (1962-03-01), St. Pierre et al.
patent: 3026210 (1962-03-01), Coble
patent: 3792142 (1974-02-01), Kobayashi et al.
patent: 3834915 (1974-09-01), Cleveland et al.
patent: 3834939 (1974-09-01), Beyer et al.
patent: 3875277 (1975-04-01), Brotton et al.

Affiliated with

Also associated with

Rating

High pressure metal vapor lamp and a transparent polycrystalline 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 metal vapor lamp and a transparent polycrystalline, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High pressure metal vapor lamp and a transparent polycrystalline will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-863676