Envelope seal structure for metal vapor arc lamp

Details Envelope seal structure for metal vapor arc lamp Envelope seal structure for metal vapor arc lamp

H - Electricity

01

J

313/135, 316/32

H01J 61/36 (2006.01)

Patent

CA 1162970

LD 8233 ARC TUBE CONSTRUCTION ABSTRACT OF THE DISCLOSURE A vitreous arc tube is provided with constricted cylindrical neck portions intermediate the bulb portion proper and the pinched seals. The constricted necks may be formed as an incident in the blowing of the bulb out of quartz tubing. When the seal portions are pressed by the pinching jaws about the foliated inleads, the necks are maintained in substantially their original configuration and merely shrunk slightly about the in- leads extending through them. An internal configuration is achieved which is substantially a surface of revolu- tion and fin-effect is avoided.

381063

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