Priam

Ampex Corporation

Priam (delaware) Corporation

Henry B Hazebrouck

Joseph T Castagna

A latch mechanism for use in a disc drive rotary actuator and like magnetic device includes a selectively energizable electromagnet mounted to the actuator and spaced from the magnets, and a ferrous arm pivotally attached between the magnets and the electromagnet whereby the latch arm can assume two stable positions of low magnetic reluctance for stray flux from the magnets. In one position the latch arm pivots towards the magnets and engages the rotary actuator. In the other position, the latch arm pivots towards the electromagnet and disengages the rotary actuator. Positioning of the latch arm is dependent on momentary energization and polarity of the electromagnet.

Latch mechanism for rotary actuator and the like

A movable actuator supporting a stacked assembly of read/write heads for unitary movement adjacent respective disk surfaces of a disk drive mechanism, the movable actuator incorporating a series of secondary actuators, one for each head, each secondary actuator including a bimorph member with piezoelectric properties, and capable of extremely precise movements for secondary positioning.

Bimorph actuator for a disk drive

In an information storage system having a plurality of data storage medias which may be read and/or written onto by multiple read/write heads carried by a plurality of aligned head arms, a damping device is provided for reducing vibrations within the head arms. The damping device is formed of a compressible viscoelastic material having a relatively high loss factor.

Head arm damping device for disc drive actuators

In the carriage assembly of a disk drive, thermally compensating elements are positioned between the support structure for the carriage and a fixed guide plate which is associated with an outrigger bearing of the carriage. Compensation is achieved for expansion of the carriage base and displacement of the fixed guide plate and the outrigger bearing which results from thermal change, thereby precluding roll of the carriage.

Thermal compensation for disk drive carriage assembly

A crash stop assembly for use in a rotary actuator includes a folded leaf spring having two opposing spring arms joined by a base portion. The base portion is mounted to the rotary actuator with the spring arms maintained in compression. Projecting ears on the pivot block assembly of the rotary actuator engage the folded leaf spring to limit travel of the pivot block assembly.

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Sunnyvale, CA, United States of America

Henry B Hazebrouck