Seagate Technology Incorporated

Other

At&t Company

Amlyn Corporation

David M Lewis

Travis R Lewis

Don M Robinson

Richard E Johnson

Dhiru N Desai

Terry A Lewis

Ronald W Higgins

Nimesh Parikh

Roger O Williams

Dhlrubwai N Desai

Thread repair tools having (i) a disc-shaped member with an axis of rotation extending through and dissecting first and second major surfaces of the disc-shaped member, (ii) a shaft fixedly connected to or fixedly connectable to the disc-shaped member, with the shaft extending from the second major surface of the disc-shaped member along the axis of rotation; and (iii) an abrasive surface along an outer periphery of the disc-shaped member are disclosed. Methods of making the thread repair tools, and methods of using the thread repair tools are also disclosed. Methods of using the thread repair tools include a method of: (i) connecting the thread repair tool to a hand-held powered device capable of rotating the thread repair tool along the axis of rotation of the thread repair tool, and (ii) abrading an object with the disc-shaped member of the thread repair tool as the thread repair tool is rotated along the axis of rotation by the hand-held powered device.

Thread repair tools and methods of making and using the same

Connected blocks of micro-instructions are reloaded to a register file in a sequencer, which is used for controlling an interfacing between a host computer, a magnetic disk-drive, and a buffer memory. This provides for efficiently reloading sequencer microinstructions into a relatively small sequencer-memory space and minimizes use of external system resources for reloading microinstructions. This avoids the sequencer having to remain in a wait condition until a system processor completes higher priority tasks and becomes available for reloading instructions to memory cells of the sequencer. The method includes storing a plurality of blocks of microinstructions in a buffer memory device. A first block of microinstructions is stored in a register file. A second block of microinstructions stored within the buffer memory device is called using microinstructions contained within the first block of microinstructions. The second block of microinstructions are loaded into the register file, where the second block of microinstruction contain microinstructions for loading a third block of microinstructions into the register file, and so on. The sequencer interfaces with a buffer memory, which stores a plurality of blocks of microinstructions. A register file stores a first block of microinstructions, where the first block of microinstructions includes microinstructions for selecting a second block of microinstructions from the buffer memory. The first block of microinstruction includes microinstructions for subsequently loading the selected second block of microinstructions into the register file.

Method and apparatus for reloading microinstruction code to a SCSI

A retaining system holds sheet material smooth and flat upon a mattress against the movements of a bed occupant. Opposing edges of the sheet are provided with hems for removably receiving elongate rigid slats or battens. At the midpoint of each batten is an attaching means. An aperture in each hem provides access to the attaching means. A flaccid cord or tape assembly is passed beneath the mattress. The cord is provided at its ends with connectors for connection to the attaching means on the battens. The cord is pulled taut and held under tension. This pulls the battens down along the sides of the mattress and holds the sheet smooth and taut against the mattress.

Retainer for bedclothes

A method for temporarily storing and retrieving 8-bit character information data for a magnetic disk information storage system in a number of 4.times.n DRAM buffer memory configurations. A virtual memory address for each of said 8-bit information characters is provided and each of the characters are organized into a 16-byte block. The virtual memory addresses are translated to corresponding addresses of memory locations in said 4.times.n buffer memory unit for storage of 4-bit groups of said 16-byte block in said 4.times.n DRAM buffer memory by selecting a row address for storage of said 16-byte block, by selecting a base column address for said 16-byte block, and by successively incrementing said base column address by 4 to provide additional column address for successive 4-bit groups of said 16-byte blocks. Each of said 4-bit groups of said 16-byte block are transferred through a 4-bit data bus to the various predetermined address locations in one of said 4.times.n DRAM buffer memory configurations as determined by the translating step. An 8-bit parity word for the 16-byte block is stored in a separate part of the 4.times.n memory.

Buffer memory control system for a magnetic disc controller

A method and a system for providing a skewed clock signal which is used for latching a data signal received from a memory into a read-data latch. A control signal latch and a control-signal buffer provide a control sign to the memory. A read-data buffer feeds a data signal from the memory to a read-data latch, which is provided with skewed read-clock signal. A read-clock delay circuit provides a clock signal to the read-data latch, and delays the read clock signal a period of time approximately equal to the signal propagation delay time of the read data buffer and the propagation delay time associated with transmitting a signal from the output terminal of said control signal latch circuit to the control-signal input terminal of the memory.

Method and apparatus for skewing a memory read clock signal in a

An oscillator circuit is tuned to the frequency of reference pulses, for example, the spindle index pulses of a rotating magnetic storage system. A ring oscillator circuit includes a series transmission gate. The transmission gate is controlled by the output signal from a programmable delay line to interrupt operation of the ring oscillator and, in effect, provide fine tuning of the ring oscillator frequency in programmed steps. The output signal of the ring oscillator is divided down in a programmable divider, which provides a coarse frequency adjustment for an output pulse signal provided by the divider. Output signals from the divider are also provided as inputs to the programmable delay line. The frequency of the output pulse signal is compared to the frequency of the reference pulses to generate control signals for the programmable delay line. The control signals are generated by a microprocessor.

Tuned ring oscillator

A programmable register stores a control bit for settting the logic polarity of an I/O signal at an I/O terminal of an integrated circuit. The I/O polarity control signal is combined in an exclusive-OR logic circuit with the I/O signal to provide a given logic polarity for the I/O signal. For a bi-directional I/O terminal, two exclusive-OR gates are used, one for controlling polarity of output signals from the integrated circuit to the I/O terminal and the other for controlling the polarity of input signals to the integrated circuits which are received at the I/O terminal. The control of the I/O signal polarity is particularly useful for a disk-drive controller which interfaces with different magnetic disk drive units, having different I/O signal polarity requirements.

Apparatus and method for programmably controlling the polarity of an I/O

A floppy disk drive including a pivotally mounted disk pack storing a plurality of floppy diskettes, a driver mechanism for rotating any one of the diskettes into a retrievable position, a picker mechanism for moving the one diskette between the retrievable position and an operative position at which the diskette is rotatable on a spindle, and a position control circuit for controlling the position of a recording head across the one diskette being in the operative position and for compensating for expansion, contraction, and eccentric rotation of the one diskette. The floppy diskettes are stored bent in the disk pack, but in the operative position the one diskette that had been retrieved from the retrievable position is stored only partially in the disk pack and parallel to the plane of rotation. A microprocessor controls the entire disk drive.

Disk drive

Wall structure modules comprising a plurality of narrow, substantially ceiling high panels of integral sandwich construction with a thickness of insulation molded between two thicknesses of light weight concrete. There are tongue and groove configurations along opposite sides of the panels conditioning them to be nested together. A full-height steel stud is encased in each exterior panel and has a small bracket at the top exposed for attachment of a top plate, which fits over the panels of a complete wall section to unitize it. Interior panels are similar but the steel studs are full height in every other panel only. A transverse channel extends across the bottom of each panel on the inside, the lower flange of which is secured to the sub-floor. In the assembled wall these channels are aligned to serve as a conduit for plumbing and electrical wiring.

Growing community of inventors

Santa Cruz, CA, United States of America

David M Lewis