Radiation and static electricity suppression device

• US 4,468,702 A
• Filed: 04/16/1982
• Issued: 08/28/1984
• Est. Priority Date: 04/16/1982
• Status: Expired due to Fees

• Current Assignee: Sun-Flex Company
• Original Assignee: DACA International BV
• Inventors: Jandrell, Louis H. M.
• Primary Examiner(s): Britton, Howard W.
• Assistant Examiner(s): Coles, Edward L.
• Application Number:
  US06/369,127
• Time in Patent Office: 865 Days
• Field of Search: 358/245, 174/35.4
• US Class Current: 348/819
• CPC Class Codes: H01J 2229/8633 Meshes and patterns
• CPC Class Codes: H01J 29/868 Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers
• CPC Class Codes: H05F 3/02 by means of earthing connections

Abstract

A radiation and static electricity suppression device is disclosed that is formed of a mesh fabric having at least some of the yarns capable of conducting electricity. The mesh is affixed to a frame that serves to conform the mesh to the surface of a cathode ray tube. A grounding connection is included to ground the mesh to the chassis of the cathode ray tube. The mesh when grounded supresses the static field and significantly reduces electro-magnetic radiation emanating from the CRT circuitry and passing through the opening in the CRT housing.

Claims

1. A radiation and static electricity suppression device for a cathode ray tube comprising:

a fine mesh fabric in which at least some of either the warp or weft fibers are electrically conductive and further that the electrically conductive fibers are generally evenly distributed across the mesh;

said fine mesh fabric conformable to the viewing surface of the cathode ray tube;

means for electrically connecting said electrical conductive fibers with said cathode ray tube.

2. The radiation and static electricity suppression device of claim 1, wherein the means for electrically connecting the fibers with the cathode ray tube includes a flexible frame conformable to the display surface of the cathode ray tube.

3. The radiation and static suppression device of claim 2 wherein the fine mesh fabric is formed of a synthetic material and further wherein the electrically conductive fibers of the mesh fabric are of a synthetic material having electrically conductive properties.

4. The radiation and static electricity suppression device of claim 1 or claim 3 wherein the fibers are essentially non-reflective.

5. The radiation and static electricity suppression device of claim 3 further including conduit means for connecting the flexible frame with the cathode ray tube.

6. The radiation of static electricity suppression device of claim 1 wherein at least one-third of the individual warp and weft fibers of the fine mesh fabric are electrically conductive.

7. The radiation and static electricity suppression device of claim 6 wherein the means for electrically connecting the electrically conductive fibers with the cathode ray tube includes a flexible frame conformable to the display surface of the cathode ray tube and an electrically conducting glue fixing the fine mesh fabric to the flexible frame.

8. The radiation and static suppression device of claim 3 wherein the synthetic conductive fibers are impregnated with electrically conductive material.

9. The radiation and static suppression device of claim 3 wherein the synthetic fibers are of a synthetic material coated with an electrically conductive material.