Frishauf, Holtz, Goodman & Woodward
Disc drive apparatus
 A disc drive apparatus for driving a disc selected from discs of various diameters with and without a central hole comprises: a turntable with a hole at the center of rotation thereof; a turntable support for rotatably supporting the turntable; a motor for driving the turntable; a centering member to be detachably inserted in the hole of the turntable and for mounting a disc with a central hole; a plurality of elastic disc support members which are coaxial with the center of rotation of the turntable, which extend from the surface of the turntable, and which form a plurality of annular shapes; centering index marks, disposed on the turntable, for centering a disc without a central hole; a vacuum pump; and suction channels, one end of which is open to the surface of the turntable and the other end of which is connected to the vacuum pump, for fixing on some of the disc support members the disc selected from discs of various diameters with and without a central hole and placed on some of said disc support members. 
Olympus Optical Co., Ltd.
G G G G
G11B G11B G11B G11B
inventional inventional inventional inventional
Masaharu Ken Hiroshi Kiichi Kunio Shoji
Sakamoto Ohshima Kodama Kato Yamamiya Yoshikawa