Cooling system for projection television receiver
AssigneePioneer Electronic Corporation
InventorShinichi Hasegawa
Life of this patent
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Abstract
A cooling system for a projection television receiver, the receiver having at least one cathode ray tube with a face thereon, comprising a lens for focusing light exiting from the tube; a frame supporting the lens in alignment with the face of the tube for defining a cooling chamber between the lens and the face with a fluid therein; and seals for sealing the tube and the lens to the frame in a fluid-tight manner and essentially preventing gas from the fluid sealed in the chamber from exiting the chamber. The seals are preferably of a material which is essentially, impermeable to the passage of the gas, such as co-vulcanized ethylene propylene rubber and polydimethyle siloxane.
Claims6
A cooling system for a projection television receiver, the receiver including at least one cathode ray tube having a face, comprising:
- a lens for focusing light existing from said tube;
- frame means for supporting said lens in alignment with the face of said tube for defining a cooling chamber between said lens and said face;
- sealing means, including a pressing plate and means for exerting uniform pressure by said pressing plate against a packing disposed between said tube and said pressing plate, for sealing said tube and said lens to said frame means in a fluid-tight manner and essentially preventing gas from existing said cooling chamber;
- and
- means for filling said chamber with a coolant, wherein said frame means includes an upper side wall having double taper surfaces adjacent said filling means.
Dependencies are inferred from the claim text.