Arc tube construction

Electric lamp and discharge devices – With gas or vapor – Envelope with particular structure

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Details

H01J 6130, H01J 6136

Patent

active

043968570

ABSTRACT:
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 inleads extending through them. An internal configuration is achieved which is substantially a surface of revolution and fin-effect is avoided.

REFERENCES:
patent: 2821647 (1958-01-01), Rigden
patent: 2844919 (1958-07-01), Power
patent: 2848641 (1958-08-01), Peterson et al.
patent: 3324332 (1967-06-01), Waymouth et al.
patent: 3390298 (1968-06-01), Werner
patent: 3419947 (1969-01-01), Gottschalk et al.
patent: 3714493 (1973-01-01), Fridrich
patent: 3878421 (1975-04-01), Boehme
patent: 3939538 (1976-02-01), Hellman et al.
patent: 4161672 (1979-07-01), Cap et al.

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