Overhead projector having a modular inner enclosure

Details Overhead projector having a modular inner enclosure Overhead projector having a modular inner enclosure

G - Physics

03

B

G03B 21/132 (2006.01)

Patent

CA 2395679

An embodiment of an overhead projector (10) including an outer enclosure including a projection stage; a plurality of hazardous components; and an inner enclosure (30) located inside of the outer enclosure, wherein the inner enclosure meets both fire and electrical enclosure requirements and the inner enclosure encloses all hazardous components. The inner enclosure is a modular electrical and optical assembly located inside of the outer enclosure including a main shell compartment, the hazardous components - including a transformer (50) having a core and a primary winding placed inside the main shell compartment - a projection lamp (44) electrically coupled to the first winding. The projection lamp has a light source portion and electrical contacts. The projection lamp is optically aligned with respect to the stage.

L'invention concerne un mode de réalisation consistant en un rétroprojecteur (10) comprenant un boîtier extérieur présentant un plateau de projection; une pluralité de composants dangereux; et un boîtier intérieur (30) placé à l'intérieur du boîtier extérieur. Le boîtier intérieur répond à la fois aux normes de protection contre le feu et aux normes d'isolation électrique et il renferme tous les composants dangereux. Le boîtier intérieur consiste en un ensemble optique et électrique modulaire disposé à l'intérieur du boîtier extérieur comprenant un compartiment d'isolation principal, les composants dangereux y compris un transformateur (50) pourvu d'un noyau et d'un enroulement primaire se trouvant à l'intérieur du compartiment d'isolation principal une lampe de projection (44) reliée électriquement au premier enroulement. La lampe de projection présente une portion source lumineuse et des contacts électriques. La lampe de projection est alignée de manière optique par rapport au plateau.

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