William Higdon resumes & CV records
Resumes
William Higdon
William R Higdon DeceasedDecaturville, TN
William Higdon Phones & Addresses
Decaturville, TN
Huron, TN
Pleasanton, CA
Lexington, TN
2320 Mullins Rd, Huron, TN 38345
Mentions for William R Higdon
Publications & IP owners
Us Patents
Method Of Fabricating Connector
US Patent:
5578157, Nov 26, 1996
Filed:
Sep 28, 1994
Appl. No.:
8/314479
Inventors:
William R. Higdon - Pleasanton CA
Assignee:
Microsensor Technology, Inc. - Fremont CA
International Classification:
B29C 6502
B29C 6554
B29C 6554
US Classification:
156278
Abstract:
A detachable column cartridge for a gas chromatograph is disclosed. The cartridge column contains analytical and reference columns, a heater and a thermocouple, and connects via detachable connectors to a base unit containing an injector, a detector and other components normally found in gas chromatographs. The cartridge arrangement permits a substitute column to be connected to the base unit easily, in the field, when different gases are to be separated and analyzed. Also included are specific connectors for detachably connecting the columns with capillary tubes in the base unit of the gas chromatograph.
Housing Assembly For Micromachined Fluid Handling Structure
US Patent:
5964239, Oct 12, 1999
Filed:
May 23, 1996
Appl. No.:
8/652878
Inventors:
Alan D. Loux - Livermore CA
William R. Higdon - Pleasanton CA
Timothy G. Slater - San Francisco CA
William R. Higdon - Pleasanton CA
Timothy G. Slater - San Francisco CA
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
F16K 4300
F16K 2700
F16K 2700
US Classification:
137 15
Abstract:
A housing for a (silicon) micromachined body (for instance an injector valve system, a detector or a stream selector for a gas chromatograph instrument) is field assemblable and disassemblable and mechanically self-aligning so that the micromachined body may be replaced in the field without tools and without adhesives or permanent bonding. The housing includes a top plate and a bottom plate spaced apart by two side rails and accommodating the micromachined body. The various tubes carrying fluids and pneumatic pressure to and from the micromachined body are attached to the housing by adhesives or brazing or by detachable screw-type fittings. The housing is held in alignment by alignment pins passing through it and is clamped together by a spring clamp which also clamps the housing to a printed circuit board and associated planar heater element. In addition to easy field assembly, this assembly allows manufacturing without precision alignment tools, adhesives, or welding.
Selector Valve Assembly
US Patent:
6102068, Aug 15, 2000
Filed:
Sep 23, 1997
Appl. No.:
8/936044
Inventors:
William R. Higdon - Pleasanton CA
Alan D. Loux - Livermore CA
Alan D. Loux - Livermore CA
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
F16K 1100
US Classification:
137341
Abstract:
A selector valve assembly has reduced size, reduced cost, and increased repeatability with improved reliability and reduced maintenance expense due to use of a silicon micromachined valve body held in a releasable housing which in turn is mounted on a manifold plate to which are attached inlet and outlet fluid carrying tubing. The manifold plate includes two metal plates bonded together by an intervening polymer film and defining thread female connection inlets for tube fittings. The micromachined valve body is connected to a pilot valve assembly providing pneumatic operation of the micro-valves in the micromachined valve body. Also, a heater is mounted on the manifold plate to maintain temperature. The micromachined valve body is held on the manifold plate by a releasable spring-loaded assembly allowing quickly replacement of the micro-valve body in case of its failure.
Connector For Detachable Column Cartridge For Gas Chromatograph
US Patent:
5601785, Feb 11, 1997
Filed:
Mar 28, 1994
Appl. No.:
8/218605
Inventors:
William R. Higdon - Pleasanton CA
Assignee:
Microsensor Technology, Inc. - Fremont CA
International Classification:
B01L 1100
US Classification:
422103
Abstract:
A detachable column cartridge for a gas chromatograph is disclosed. The cartridge column contains analytical and reference columns, a heater and a thermocouple, and connects via detachable connectors to a base unit containing an injector, a detector and other components normally found in gas chromatographs. The cartridge arrangement permits a substitute column to be connected to the base unit easily, in the field, when different gases are to be separated and analyzed. Also included are specific connectors for detachably connecting the columns with capillary tubes in the base unit of the gas chromatograph.
Detachable Column Cartridge Gas Chromatograph
US Patent:
5236668, Aug 17, 1993
Filed:
Dec 23, 1991
Appl. No.:
7/812532
Inventors:
William R. Higdon - Pleasanton CA
International Classification:
G01N 3054
US Classification:
422 89
Abstract:
A detachable column cartridge for a gas chromatograph is disclosed. The cartridge column contains analytical and reference columns, a heater and a thermocouple, and connects via detachable connectors to a base unit containing an injector, a detector and other components normally found in gas chromatographs. The cartridge arrangement permits a substitute column to be connected to the base unit easily, in the field, when different gases are to be separated and analyzed.
Detachable Column Cartridge Gas Chromatograph
US Patent:
5298225, Mar 29, 1994
Filed:
Jul 30, 1993
Appl. No.:
8/100022
Inventors:
William R. Higdon - Pleasanton CA
Assignee:
Microsensor Technology, Inc. - Fremont CA
International Classification:
G01N 3054
US Classification:
422 89
Abstract:
A detachable column cartridge for a gas chromatograph is disclosed. The cartridge column contains analytical and reference columns, a heater and a thermocouple, and connects via detachable connectors to a base unit containing an injector, a detector and other components normally found in gas chromatographs. The cartridge arrangement permits a substitute column to be connected to the base unit easily, in the field, when different gases are to be separated and analyzed.
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