US 4,285,018 AGranted

Disk file

AssigneeInternational Business Machines Corporation

InventorsRichard B. Mulvany, Tulsidas R. Patel

Life of this patent

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Abstract

A disk file for storing data is disclosed which comprises two major separable assemblies, an HDA assembly and a disk drive assembly. The HDA assembly is characterized by two separate carriage units each of which function to position a plurality of magnetic transducers in transducing relationship with a different group of magnetic disks which are mounted on a common horizontally disposed disk spindle. The disk drive assembly is characterized by an integral baseplate whose front section is generally U-shaped in cross-sections permitting the lower portion of the HDA assembly which surrounds the magnetic disks to be positioned within the opening defined by the opposed surfaces of the U-shaped front portion. The front portion is open to accommodate the positioning of the HDA assembly on the drive assembly by a horizontal loading motion. The drive portion of the baseplate is provided with a horizontally disposed shelf portion to which the magnetic structure of a voice coil motor is mounted. The annular flux gaps of the voice coil motor are positioned to receive voice coils which may be permanently associated with the carriage units of the HDA. The drive assembly further includes a motor which is disposed beneath the horizontal shelf portion and which may be coupled to drive the spindle of the HDA assembly. Additionally, an air supply system including a blower which is connected directly to the spindle motor shaft is provided to supply contaminant free air to the HDA assembly.

Claims2

Dependent claims

A dual actuator disk file comprising an HDA assembly and a disk drive assembly,

said HDA assembly being separable as a unit from said drive assembly and comprising at least one magnetic disk,
a spindle for mounting said disk,
a two part frame for mounting said spindle for rotation of said disk about an axis which is substantially horizontal and for supporting said HDA assembly in operating position on said drive assembly,
first and second magnetic head transducer carriage units each of which comprises a movable carriage portion and a stationary way portion and at least one head-arm member attached to each said carriage portions, and
means mounting said way portions on opposed sides of said frame to cause the respective carriage portions to move along parallel paths which are normal to the axis of said spindle and parallel to a horizontal plane containing said spindle axis and disposed on opposite sides of said at least one disk whereby the respective head-arm members are positionable independently of each other to transducing relationships with opposite surfaces of said at least one disk,
said drive assembly comprising a baseplate having a U-shaped cross-section into which a portion of said HDA assembly below said horizontal plane is positioned when said HDA is in operating position on said drive assembly,
voice coil magnet means mounted on said baseplate including magnet structure defining first and second annular flux gaps, and
first and second voice coils permanently associated with said first and second carriage units for causing movement of said carriage portions independently of each other in response to separate signals supplied to said respective voice coils.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/006,404Filed 25 Jan 1979
Granted: 18 Aug 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G11B 5/5521
Track change, selection or acquisition by displacement of the head: across disk tracks
G11B 19/20
Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of…:…
G11B 23/021
Containers; Storing means both adapted to cooperate with the recording or reproducing means: comprising means for reducing influence of physical…
G11B
Information storage based on relative movement between record carrier and transducer