High pressure sodium lamp having reduced arc tube size

Details High pressure sodium lamp having reduced arc tube size High pressure sodium lamp having reduced arc tube size

H - Electricity

01

J

H01J 1/02 (2006.01) H01J 7/10 (2006.01) H01J 17/04 (2006.01) H01J 17/20 (2006.01) H01J 61/30 (2006.01) H01J 61/82 (2006.01)

Patent

CA 2398677

A high pressure sodium lamp (100) having an evacuated glass envelope (6) with a plurality of electrically conductive support members therein and extending therethrough. An elongated arc tube (14) having a pair of electrodes (26) extending therethrough is affixed to the electrically conductive support members within the glass envelope. A gas fill includes a quantity of mercury and sodium within the elongated tube. The arc tube is selected from a translucent material that, when the lamp is operating, will have a wall temperature of about 1250 degrees Celsius, a wall loading of from about 18.9 to about 22.2 w/cm sqr., and a power consumption of from 150 to 400 watts. Further, the amount of mercury is reduced from 14.4 mgs/arc tube to 10.8 mgs/arc tube, allowing lamps having power consumption from 150 to 400 watts to pass the Toxicity Characteristics Leaching Procedure (TCLP).

L'invention concerne une lampe à sodium à haute pression (100) dotée d'une enveloppe de verre sous vide (6) comprenant plusieurs éléments de support conducteurs d'électricité qui s'étendent à l'intérieur de ladite enveloppe. Un tube arqué allongé (14) pourvu de deux électrodes (26) s'étendant à l'intérieur dudit tube est fixé sur les éléments de support conducteurs d'électricité à l'intérieur de l'enveloppe en verre. Une charge de gaz comprend une quantité de mercure et de sodium à l'intérieur du tube allongé. Le tube arqué est sélectionné à partir d'un matériau translucide qui lorsque la lampe fonctionne, atteint une température de paroi d'environ 1250 degrés Celsius, un chargement de paroi compris entre environ 18,9 et 22,2 w/cm sqr., et une consommation de courant comprise entre 150 et 400 watts. En outre, la quantité de mercure est réduite de 14,4 mgs/tube arqué à 10,8 mgs/tube arqué, ce qui permet aux lampes dotées d'une consommation de courant comprise entre 150 et 400 watts de satisfaire la procédure de lixiviation des caractéristiques de toxicité.

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