Electrodeless low-pressure sodium vapor discharge lamp having a

Details Electrodeless low-pressure sodium vapor discharge lamp having a Electrodeless low-pressure sodium vapor discharge lamp having a

1992-05-29

1994-08-09

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313 25, 313493, 313607, 313234, 315248, H01J 6100

Patent

active

053369718

ABSTRACT:
The electrodeless low pressure sodium vapour discharge lamp which has a discharge vessel (1) containing sodium vapour and inert gas. The discharge vessel (1) has an enveloping part (10) and connected therewith at a first end of the discharge vessel (1) a sunken part (20). In the sunken part (20) is a body (30) of soft-magnetic material which is surrounded by an electric coil (31). The discharge vessel (1) is enclosed in an outer bulb (40). The inner surface (2) of the discharge vessel (1) has a layer (4) of borate glass. The borate glass which covers the sunken part (20), is sintered. The invention renders it possible to make parts of construction glass which have a layer of borate glass at an outer surface.

REFERENCES:
patent: 4209726 (1980-01-01), Jack et al.
patent: 4223250 (1980-09-01), Kramer et al.
patent: 4783612 (1988-11-01), Sprengers
patent: 5130912 (1992-07-01), Friederichs
patent: 5148085 (1992-09-01), Kroes

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