Single-ended, plastic-based high-pressure discharge lamp

Details Single-ended, plastic-based high-pressure discharge lamp Single-ended, plastic-based high-pressure discharge lamp

1993-06-16

1995-06-27

O'Shea, Sandra L.

Electric lamp and discharge devices

With envelope

Having base and connector

313 49, 439611, H01J 548

Patent

active

054282616

ABSTRACT:
To protect the plastic material of a plastic base (2) holding a single-en high pressure discharge vessel (1) in position with respect to ultraviolet (UV) radiation and heat emitted from the discharge vessel in operation of the lamp, a cover element (7, 7") of UV radiation and high temperature resistant material, such as a ceramic and preferably aluminum oxide, is positioned between the discharge vessel and the plastic material of the base, located to shield the plastic base from UV and heat radiation. The cover element is, essentially, in disk or plate form, and irremovably connected to the base, for example by pin extensions integral with the base, passing through recessed openings in the cover element, and headed over, in the form of rivet or button heads, for example by ultrasonic welding.

REFERENCES:
patent: 4533851 (1985-08-01), Block et al.
patent: 4626734 (1986-12-01), Greiler
patent: 4795939 (1989-01-01), Eckhardt et al.
patent: 5021706 (1991-06-01), Chen
patent: 5036439 (1991-07-01), Hoffmann et al.
patent: 5039904 (1991-08-01), Kosmatka et al.
patent: 5172026 (1992-12-01), Hall et al.
patent: 5216318 (1993-06-01), Van Dulmen et al.
patent: 5216319 (1993-06-01), Van Heeswijk
patent: 5220235 (1993-06-01), Wakimizu et al.
patent: 5291092 (1994-03-01), Coushaine

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