David John Kirk

US Patent:

49120689, Mar 27, 1990

Filed:

Nov 21, 1988

Appl. No.:

7/274387

Inventors:

David J. Michael - White Oak PA
David A. Kirk - Pittsburgh PA
Leigh F. Brooks - Pittsburgh PA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

C04B 3554
C04B 3504

US Classification:

501101

Abstract:

A mix for forming a carbon-bonded refractory shape comprising from about 70 to 92 wt. % of a high purity magnesite and about 8 to 30 wt. % of a high purity graphite, and for each 100 wt. % of said magnesite and graphite, from about 1. 5 to 6 wt. % of a carbon-containing bonding agent; said graphite containing at least about 98% carbon and having at least about 75% by weight -65 mesh or finer particles and said magnesite containing at least about 98% MgO, and containing less than about 0. 03% boron oxide, less than about 0. 3% silica, and having a CaO/SiO. sub. 2 weight ratio above about 2, and the resultant carbon-bonded refractory shape and liner for basic oxygen furnaces made from such shapes and the method of increasing the life of liners for basic oxygen furnaces.

US Patent:

49578871, Sep 18, 1990

Filed:

Mar 22, 1990

Appl. No.:

7/497428

Inventors:

David J. Michael - White Oak PA
David A. Kirk - Pittsburgh PA
Leigh F. Brooks - Pittsburgh PA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

C04B 3504
C04B 3554

US Classification:

501101

Abstract:

A mix for forming a carbon-bonded refractory comprising from about 8 to 30 wt. % of a high purity carbon, about 0. 1 to 1 wt. % of aluminum metal, magnesium metal, or a mixture thereof, and the balance a high purity magnesite, and for each 100 wt. % of said magnesite, carbon, and metal, a carbonaceous bonding agent in an amount sufficient to bond the mix; said carbon containing at least about 98% carbon and said magnesite containing at least about 98% MgO, and containing less than about 0. 03% boron oxide, less than about 0. 3% silica, and having a CaO/SiO. sub. 2 weight ratio above about 2, and the resultant carbon-bonded refractory shapes and liners for metal processing equipment, especially BOF, made from such shapes and the method of increasing the life of liners for such equipment.

US Patent:

58754644, Feb 23, 1999

Filed:

Mar 18, 1996

Appl. No.:

8/617347

Inventors:

David Brian Kirk - Monroeville PA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1202

US Classification:

711129

Abstract:

The traditional computer system is modified by providing, in addition to a processor unit, a main memory and a cache memory buffer, remapping logic for remapping the cache memory buffer, and a plurality of registers for containing remapping information. With this environment the cache memory buffer is divided into segments, and the segments are one or more cache lines allocated to a task to form a partition, so as to make available (if a size is set above zero) of a shared partition and a group of private partitions. Registers include the functions of count registers which contain count information for the number of cache segments in a specific partition, a flag register, and two register which act as cache identification number registers. The flag register has bits acting as a flag, which bits include a non-real time flag which allows operation without the partition system, a private partition permitted flag, and a private partition selected flag. With this system a traditional computer system can be changed to operate without impediments of interrupts and other prior impediments to a real-time task to perform.