Patent ID: 6167023
Filing Date: 2000-12-26
Classification: G11B

Abstract:
A releasable disc adaptor for conforming the central hub of a CD type information storage disc to a magneto-optical disc drive having a spindle having a center pin and an annular magnet for securing the disc for rotation, said adaptor comprising:an annular hub receiving member having an inner diameter sized to receive said center pin such that said center pin is substantially flush with said hub receiving member, said hub receiving member also having a center;an annular medium receiving member having an inner diameter sized to receive said center pin such that said center pin is substantially flush with said medium receiving member, said medium receiving member also having a center, said medium receiving member being connected to and flush with said hub receiving member such that the centers of said medium receiving member and said hub receiving member are collinear and the holes defined by said inner diameters of said hub receiving member and said medium receiving member align to form a substantially continuous bore;a hub fastener fixedly mounted to said hub receiving member, said hub fastener for removably securing said hub receiving member to said disc-drive annular magnet; anda medium fastener assembly connected to said medium receiving member, said medium fastener assembly including an annular connecting member having a center having an inner diameter sized to receive said center pin such that said center pin is substantially flush with said connector member, said connecting member removably connected to said medium receiving member at a point remote from said hub receiving member, said medium fastener assembly further including an annular medium fastening member having a center, said medium fastening member connected to said connecting member at a point remote from said medium receiving member, the centers of said medium fastening member, said connecting member, said medium receiving member, and said hub receiving member being collinear;said medium fastener assembly removably securing a respective central hub of a CD type information storage disc to said hub receiving member, said medium fastener assembly further including means for preventing slippage of the disc so that the disc hub is thereby conformed to properly seat on said disc-drive spindle while thereafter allowing the disc to be fully disengaged from said hub receiving member, said medium receiving member and said medium fastener assembly for proper seating on a CD type disc drive spindle and;said hub receiving member, medium receiving member, hub fastener, and medium fastener assembly forming a portable assembly that may be employed in any one of a plurality of different magneto-optical disc drives.