Coupler systems for projection televisions
AssigneeU.S. Precision Lens Incorporated
InventorJohn D. Rudolph
Life of this patent
Estimating the term…
Abstract
A coupler system (13) for mounting a projection lens (15) to a cathode ray tube (16) in a projection television (10) is provided. The system includes a first member (20) composed of a heat and chemical resistant plastic and a second member (22) composed of metal. The second member (22) is mounted to the periphery (18) of the faceplate (17) of the cathode ray tube (16) to provide a high level of heat transfer from the tube. The second member also absorbs x-rays emitted by the tube. The first member can be readily molded from high performance plastic resins and thus reduces the overall cost of the coupler system compared to couplers composed entirely of metal.
Claims10
A coupler system for coupling a projection lens to a cathode ray tube, wherein the cathode ray tube has a faceplate which is cooled by a coupler fluid which comprises a mixture of ethylene glycol and glycerin, said system comprising:
- (a) a first member for mounting to the faceplate of the cathode ray tube in a fluid tight relationship, said first member
- (i) defining a fluid receiving space for receiving the coupler fluid;
- and
- (ii) being composed of a plastic material which is resistant to heat and to exposure to said coupler fluid comprising a mixture of ethylene glycol and glycerin;
- (b) means for mounting a projection lens or a component thereof to the first member in a fluid tight relationship so as to seal the fluid receiving space of the first member;and
- (c) a second member for mounting to the faceplate in a heat transferring relationship, said second member being composed of a metallic material;
- wherein the first member comes into contact with the coupler fluid and the second member does not come into contact with the coupler fluid during use of the coupler system.
Dependencies are inferred from the claim text.