Disk drive apparatus with automatic centering arrangement

Details Disk drive apparatus with automatic centering arrangement Disk drive apparatus with automatic centering arrangement

1985-02-01

1987-09-29

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360133, 360 99, 369271, 369282, G11B 5010, G11B 2504

Patent

active

046972161

ABSTRACT:
In a rotary drive apparatus for a disk of the type in which the disk is mounted on a turntable, a central pin arranged at the center of the turntable and a drive pin arranged in a position spaced radially from this center of the turntable are respectively inserted in a central hole of the disk and a drive hole spaced radially from the central hole of the disk so that the disk is driven by the drive pin upon rotation of the turntable, and the drive hole of the disk is urged radially away from the center of the turntable by the drive pin so that the periphery of the central pin is pushed against the edge of the central hole for making the center of the disk coincide with that of the turntable; the drive pin is mounted for movement in a direction opposite to the rotating direction of the turntable and simultaneously in a direction radially away from the center of the turntable in reaction to the driving of the disk by the drive pin, thereby to ensure that the force that moves the drive hole of the disk in the direction away from the center of the turntable is increased in proportion to a torque loaded on the disk, and as the result, it becomes possible, without limiting the torque, to ensure that the center of the disk will coincide accurately and surely with that of the turntable.

REFERENCES:
patent: 4040089 (1977-08-01), Guarracini
patent: 4152740 (1979-05-01), Stratton
patent: 4175274 (1979-11-01), Mann
patent: 4517617 (1985-05-01), Tsuji et al.
patent: 4613921 (1986-09-01), Holmes

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