Discharge lamp component

Details Discharge lamp component Discharge lamp component

1975-05-23

1976-09-28

Rolinec, R. V.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

29 2517, 313176, 313177, 313178, 313179, 313346R, 313356, 316 25, 316 26, H01J 6106

Patent

active

039834409

ABSTRACT:
An electric discharge lamp includes a structure within the discharge envelope comprising a source of at least one halogen, metal or metal halide to serve as an arc-modifying additive, enclosed in the structure from which it is capable of being released into the discharge envelope upon subsequent treatment, for example on heating or on striking an arc. The structure preferably comprises a hollow carrier body of refractory metal, in which the source of halogen, metal or metal halide is disposed, and may be covered by a closure of porous sintered refractory metal or of fusible metal. The fusible metal may be inert as regards the discharge and may itself affect the emitted radiation characteristics. The structure may constitute one electrode of the lamp, and may also include electron-emissive material. It has the advantage of protecting the additives from the atmosphere and thereby simplifying manufacture of the lamp.

REFERENCES:
patent: 3121182 (1964-02-01), Hui et al.
patent: 3387908 (1968-06-01), Fogelson
patent: 3405303 (1968-10-01), Koury et al.

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