Electromagnetic and electrostatic shielding for electronic equipment
First Claim
1. A shielded electronic equipment cabinet comprisinga sheet metal cage enclosing all of the electronic equipment in said cabinet except for one face thereof,a conductive mesh for enclosing said one face,a nonconductive bezel having an inner-facing lip contoured to match said one face such that, when assembled to said cabinet, said mesh is in position on said one face,said bezel also including a plurality of bosses for engaging fastening members which, when assembled, secure said cage and said mesh in intimate conductive contact with each other, andsaid bezel also including a stepped setback on its rear edge for engaging a nonconductive housing surrounding said cage and attached to said cage.
0 Assignments
0 Petitions
Accused Products
Abstract
A method and structure for assembling cathode ray tube electronic equipment is disclosed in which a sheet metal cage is assembled inside the plastic housing to enclose the electronic components. The face of the cathode ray tube is covered with a fine conductive mesh which is engaged by the bezel surrounding the front edges of the cathode ray tube. A projecting lip on the inner edge of the bezel, contoured to match the tube face, engages the mesh to keep it flat and smooth against the face of the tube. Simultaneously, flanges on the front of the cage are attached by self-tapping screws to bosses on the back side of the bezel so as to capture the edges of the mesh in conductive contact against the cage flanges. Conductive gaskets may be used to improve the electrical contact between the parts and thus improve the tightness of the shield. Internal shielding may also be provided by can-shaped shields affixed to the vertical walls of the cage and positioned so as to enclose components mounted on horizontal surfaces inside the cage. The decorative housing mates with the rear edge of the bezel and is attached to the rear of the cage by self-tapping screws. These piece parts may be selectively assembled into equipment cabinets with varied levels of shielding by using or omitting various shielding elements such as the mesh, the gaskets, the number of assembly screws or the various surfaces of the shielding cage.
57 Citations
5 Claims
-
1. A shielded electronic equipment cabinet comprising
a sheet metal cage enclosing all of the electronic equipment in said cabinet except for one face thereof, a conductive mesh for enclosing said one face, a nonconductive bezel having an inner-facing lip contoured to match said one face such that, when assembled to said cabinet, said mesh is in position on said one face, said bezel also including a plurality of bosses for engaging fastening members which, when assembled, secure said cage and said mesh in intimate conductive contact with each other, and said bezel also including a stepped setback on its rear edge for engaging a nonconductive housing surrounding said cage and attached to said cage.
-
4. A method of assembling a shielded electronic cabinet including a cathode ray tube comprising the steps of
mounting all electronic components including said cathode ray tube on a chassis, surrounding said chassis on all sides except the face of said cathode ray tube by a conductive cage, placing a conductive mesh on the face of said cathode ray tube, holding said mesh in position on the face of said cathode ray tube with a nonconductive bezel contoured to mate with said face, assembling said cage to said bezel so as to capture said mesh in intimate conductive contact between said bezel and said cage, and placing a non-conductive housing around said cage to engage said bezel.
Specification