| Patent Number |
Title Of Patent |
Date Issued |
| 4914530 |
Media defect management within disk drive sector format |
April 3, 1990 |
| In a rotating disk drive for storing and retrieving data used by a host system computer, a narrow gap is provided within a data sector format for each concentric data track of the drive. This gap may be normally located at the end of the track, in a speed tolerance buffer region followin |
| 4882671 |
Microprocessor controlled rigid disk file subsystem |
November 21, 1989 |
| A control system for a micro-Winchester or smaller disk file includes head position control circuitry including at least one servo loop for controlling an electromechanical head positioner relative to a rotating data storage disk, a data controller for controlling reading and writing |
| 4860194 |
A method for using a modular unitary disk file subsystem |
August 22, 1989 |
| A modular unitary disk file subsystem is used directly with a host computer. The subsystem includes a common unitary mounting substrate for power and signal connections to the host and for supplying control and data signals back via data, address and control buses to the host computer |
| 4858034 |
Modular unitary disk file subsystem with differing density zones |
August 15, 1989 |
| Higher data storage capacity is realized in a self contained fixed rotating disk expansion board subsystem preferably for a single electronics circuit board accessory slot of a host computer. This greater capacity, e.g. 42 megabytes of formatted storage on two 95 millimeter disks, is ach |
| 4825321 |
Modular unitary disk file subsystem having increased data storage capacity |
April 25, 1989 |
| Higher data storage capacity is realized in a self contained fixed rotating disk expansion board subsystem preferably for a single electronics circuit board accessory slot of a host computer. This greater capacity, e.g. 42 megabytes of formatted storage on two 95 millimeter disks, is ach |
| 4819153 |
Microprocessor controlled rigid disk file subsystem |
April 4, 1989 |
| An improved control system for a disk file includes head position control circuitry including at least one servo loop for controlling an electromechanical head positioner relative to a rotating data storage disk, a data controller for controlling reading and writing of data blocks fr |
| 4772974 |
Compact head and disk assembly |
September 20, 1988 |
| A compact, sealed head and disk assembly for a rotating non-removable disk data storage subsystem includes a flat and thin rigid generally rectangular box housing having a length not greater than approximately 173 millimeters, a width not greater than approximately 102 millimeters and a |
| 4712146 |
Thin and compact micro-Winchester head and disk assembly |
December 8, 1987 |
| A compact, sealed head and disk assembly for a rotating non-removable disk data storage subsystem includes a flat and thin rigid generally rectangular box housing; a thin spindle motor mounted within the form factor of the housing; a magnetic media data storage disk in the housing an |
| 4703176 |
Compact polyphase optical position encoder |
October 27, 1987 |
| A compact polyphase optical encoder subassembly for installation in host equipment is disclosed. The subassembly includes a moveable scale; and, a unitized rotatable housing for aligning a light source, a mask and a photodetector array having at least a pair of photodetector areas sy |
| 4661696 |
Optical encoder which use a rectangular photodetector array |
April 28, 1987 |
| An improved optical encoder is disclosed. The encoder includes a moveable scale with alternating equally dimensioned opaque and translucent regions extending generally perpendicular to the locus of scale movement; and a light source, a mask and a rectangular photodetector array having at |
| 4647997 |
Aerodynamic latch for disk file actuator |
March 3, 1987 |
| An aerodynamically powered release latch mechanism for a fixed disk data file is disclosed. An airflow generator disk is commonly journalled with a single data storage disk for generating airflow in an enclosed chamber. A latch is journalled for rotation relative to a base casting and ha |
| 4639863 |
Modular unitary disk file subsystem |
January 27, 1987 |
| A self contained fixed rotating disk expansion board subsystem may be installed and connected at an expansion slot location of a host computer. The subsystem includes an enclosed head/disk assembly, and circuit elements mounted on a printed circuit board which includes a connector for |
