High pressure discharge lamp with improved arc tube retention st

Details High pressure discharge lamp with improved arc tube retention st High pressure discharge lamp with improved arc tube retention st

1988-02-05

1989-06-06

Wieder, Kenneth

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313631, H01J 6134

Patent

active

048374776

ABSTRACT:
To retain an arc tube (6, 16) in precise position with respect to an opti system (R) within an outer envelope (2, 12), the arc tube is retained at both ends by spiral springs (23) which have a cylindrical portion fitted in a sleeve-like current supply (7, 17) to the arc tube and having a conically expanding portion (25), terminating in an end portion (26) which is welded to a central guide pin (27) fitted and movable within the cylindrical portion (24) of the spring. The guide pin (27) can form part of an internal current supply (FIG. 3: 19) or be secured to an internal current supply lead (FIGS. 1, 2: 9).

REFERENCES:
patent: 3662203 (1972-05-01), Kuhl et al.
patent: 4401913 (1983-08-01), Koza et al.
patent: 4747677 (1988-04-01), Whitten

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