Patent ID: 6218611
Filing Date: 2001-04-17
Classification: H04B,H05K

Abstract:
An apparatus for enclosing an electrical circuit comprising:a conductive enclosure having an interior surface and an exterior surface;said conductive enclosure having a hole therein;said hole being defined in a first part by a cylindrical surface of a first radius;said cylindrical surface being connected at a first end thereof to said interior surface,said hole also being defined in a second part by a mainly circular surface of a second radius;said mainly circular surface having a plurality of semi-cylindrical voids spaced equally around its circumference, each of the radii of the semi-cylindrical voids is smaller than the smaller of said radius of said cylindrical surface and said mainly circular surface;said mainly circular surface being connected at a first end thereof to said exterior surface of said enclosure and extends such that a second end of said mainly circular surface is located in a common plane with a second end of said cylindrical surface; also defining said hole is a ring shaped surface that is located between said second ends of said cylindrical surface and said mainly circular surface in the common plane thereof;a conductive cover adapted to fit in said hole; andwherein said conductive cover is adapted to engage said cylindrical and mainly circular surfaces of said conductive enclosure sufficiently upon rotating said conductive cover in said hole to prevent emission of electrical and electro-magnetic fields through said hole.