US 5,691,503 A · Electro-magnetically shielded door hinge

Abstract

An electro-magnetically shielded metallic enclosure is provided with a novel hinge structure. The enclosure has a plurality of side panels and at least one access door hinged to one of the side panels by a plurality of shielded hinges. Each such hinge has three principal elements: a metallic tab, an elongated slot for receiving and supporting the metallic tab, and a raised metal arch bridging the central portion of the elongated slot. The metallic tab is integrally formed on one edge of the access door and is designed to slide into an elongated slot located in an adjacent side panel to provide support for pivoting the metallic tab and the connected door in a hinged relationship. To prevent EMR from otherwise leaking through the elongated slot, a raised metal arch is provided on the interior of the enclosure bridging the central portion of the slot. The arch is spaced apart from the inner surface of the side panel to permit the free end of the metallic tab to freely rotate when the access door is swung open and closed.

Claims20

Dependent claims

An EM shielded hinge structure for hinging a metallic access door to a metallic cabinet having a plurality of side panels, said hinge structure comprising:

a hinge tab extending from and integral with one side edge of said access door, said tab having a lower edge, an upper edge and an outer edge, said tab being bent at a first acute angle from the plane of the door, and a portion of said tab lower edge extending outwardly, thereby forming a notch between said tab and said one side edge of said access door;
and
tab receiving means located in one of said side panels for receiving said hinge tab and for providing support for pivoting said hinge tab in a hinged relationship therewith, said tab receiving means including a first elongated slot in siad one side panels having a slot length coextensive with the length of said tab outer edge, said tab receiving means also including a raised metal arch extending inwardly from and integral with said side panel and bridging the central portion of said slot, said raised arch spaced apart from the surface of said side panel to permit said tab outer edge to freely rotate when said access door is swung open and closed, said arch forming an electro-magnetic shield to radiation otherwise leaking through said elongated slot.

An EM shielded metallic enclosure having a plurality of side panels and at least one access door hinged to one of the side panels by a plurality of hinges, each hinge comprising:

a metallic tab member integral with one edge of said access door and extending therefrom at a first acute angle relative to the extended plane of said access door, said metallic tab member having an upper edge portion, a lower edge portion and a free end portion, said free end portion being bent at a second acute angle such that said free end portion of said metallic tab member is substantially parallel to the plane of said access door, said lower edge portion having a notch adjacent to said one edge of said access door;
and
tab receiving means provided on one of said side panels for receiving said metallic tab member and for providing support for pivoting said metallic tab member in a hinged relationship therewith, said tab receiving means including a first elongated rectangular slot having a slot length L suitable for receiving said free end portion of said metallic tab member, said tab receiving means also including:
a raised metal continuous arch extending inwardly from and integral with said one side panel and bridging the central portion of said elongated rectangular slot, said raised arch being spaced apart from the surface of said one side panel to permit said free end portion of said metallic tab member to freely rotate when said access door is swung open and closed, said arch having a width W and forming an electro-magnetic shield to radiation otherwise leaking through said elongated rectangular slot.

1 more element

Dependencies are inferred from the claim text.

Electro-magnetically shielded door hinge

Life of this patent

Electro-magnetically shielded door hinge

Life of this patent

Abstract

Claims20