Retractable dimmer sleeve for an elongated light source

F - Mech Eng,Light,Heat,Weapons – 21 – V

Patent

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F21V 11/00 (2006.01) F21V 14/08 (2006.01)

Patent

CA 2551360

A retractable dimmer sleeve comprises sleeve material formed into an elongated enclosed passage having an open end and an interior volume for receiving an elongated light source. The dimmer sleeve enables, during operation of a light source while received within the sleeve, adjustment of a length of a selected portion of the light source that is occluded by the dimmer sleeve so that only a fraction of light emitted by the light source escapes the dimmer sleeve. The apparatus may further comprise an elongated light source at least partially enclosed by the dimmer sleeve. A method comprises: enclosing at least a portion of the light source with the retractable dimmer sleeve; and moving, during operation of the light source while received within the sleeve, an end of the dimmer sleeve along the light source, thereby adjusting a length of the light source that is occluded by the dimmer sleeve.

Manchon rétractable de gradateur qui comprend un élément manchon formé à l'intérieur d'un passage allongé clos, pourvu d'une extrémité ouverte et d'un espace intérieur permettant de recevoir une source lumineuse allongée. Le manchon gradateur peut, pendant le fonctionnement d'une source lumineuse alors diffusée dans le manchon, ajuster l'étendue d'une partie sélectionnée de la source lumineuse qui est obstruée par le manchon de gradateur de sorte que seule une fraction de la lumière émise par la source lumineuse s'échappe du manchon de gradateur. En outre, l'appareil peut disposer d'une source de lumière allongée au moins partiellement entourée par le manchon de gradateur. La méthode comprend : le recouvrement d'au moins une partie de la source lumineuse avec le manchon rétractable de gradateur et le déplacement, pendant le fonctionnement de la source lumineuse alors diffusée dans le manchon, d'une extrémité du manchon de gradateur le long de la source lumineuse, réglant ainsi l'étendue de la source lumineuse qui est obstruée par le manchon de gradateur.

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