Disk drive having an electrically isolated disk stack

Details Disk drive having an electrically isolated disk stack Disk drive having an electrically isolated disk stack

1989-11-13

1991-03-12

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9703, 360 9801, G11B 1702, G11B 3314, G11B 1708

Patent

active

049997246

ABSTRACT:
A disk drive in which the rotatable magnetic memory disks and the metal actuator are electrically isolated from the metallic mainframe of the disk drive and the magnetic heads on the metallic actuator, the coils of the magnetic heads and the magnetic memory disks are maintained at electrical potential levels which are sufficiently close to prevent arcing therebetween and which is different from the potential of the main frame. Electrical isolation is achieved by electrically insulating the disk spindle on which the disks are journaled from the mainframe and by electrically insulating the metal actuator from the metal actuator support when the metal actuator support is attached directly to the main frame, or by electrically insulating the metal actuator support from the main frame. An electrical potential is applied to the disks via the disk spindle and to the body of the magnetic heads via the metal actuator arm to provide potential levels which among these parts are sufficiently close to prevent arcing.

REFERENCES:
patent: 4038693 (1977-07-01), Huffine et al.
patent: 4701653 (1987-10-01), Merkle et al.
patent: 4800454 (1989-01-01), Schwarz et al.

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