An electrodeless bulb with means for receiving an external...

H - Electricity – 01 – J

Patent

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Details

H01J 65/04 (2006.01) H01J 61/54 (2006.01)

Patent

CA 2327684

Electrodeless lamp includes an envelope (6) containing a fill and a substance for facilitating the starting of the lamp. An outer tube (18) is secured to an outside portion of the envelope (6) in proximity to the given region and an inner tube (32) is disposed within the outer tube (18) such that a fluid passageway (36) is defined between the inner and outer tubes. A hollow retractable electrode (10) is provided within the inner tube (32), the electrode (10) having a first position in which its tip portion is in proximity to the given region of the envelope when the lamp is being started and a second position in which the tip portion is away from the envelope after the lamp is started. A source of cooling fluid is connected to the hollow electrode (10) such that the cooling fluid is forced through the hollow electrode (10) and exhausted through the fluid passageway (36).

La présente invention concerne une lampe sans électrode comprenant une enveloppe (6) qui contient un remplissage et une substance qui facilite le démarrage de la lampe. Un tube externe (18) est fixé à une partie extérieure de l'enveloppe (6) à proximité de la région donnée et un tube interne (32) est disposé à l'intérieur du tube externe (18) de manière à créer un passage de fluide (36) entre les tubes interne et externe. Une électrode creuse rétractable (10), placée à l'intérieur du tube interne, présente une première position dans laquelle son embout est à proximité de la région donnée de l'enveloppe, lorsque la lampe est en démarrage, et une seconde position dans laquelle son embout est en retrait de l'enveloppe, une fois la lampe allumée. Une source de fluide de refroidissement est reliée à l'électrode creuse (10) de manière à ce que le fluide de refroidissement passe à travers l'électrode creuse (10) et ressorte par le passage de fluide (36).

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