Electrode for a high pressure discharge lamp

H - Electricity – 01 – J

Patent

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H01J 61/073 (2006.01)

Patent

CA 2550514

The invention relates to an electrode (35) for discharge lamps containing a metallic vapour. Said electrode consists of a high melting, electroconductive material, preferably wolfram or a material predominantly containing wolfram. The inventive electrode comprises a shaft (36) provided with a rod-type head part (37) defining a longitudinal axis L. At least one borehole (39) is arranged in the region of the head part (37), essentially transversally to the longitudinal axis, especially at an angle of between 60 and 90~.

L'invention concerne une électrode (35) destinée à des lampes à décharge contenant une vapeur métallique. Cette électrode (35) est constituée d'un matériau électroconducteur à point de fusion élevé, de préférence de tungstène ou d'un matériau contenant principalement du tungstène, et elle est composée d'un fût (36) présentant une tête (37) en forme de tige qui définit un axe longitudinal L. Dans la zone de la tête (37) se trouve au moins un alésage (39) placé sensiblement transversalement par rapport à l'axe longitudinal, formant en particulier avec ce dernier un angle de 60 à 90·.

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