Randall Norman Robinson

US Patent:

7831021, Nov 9, 2010

Filed:

Aug 31, 2009

Appl. No.:

12/551059

Inventors:

Richard Schumacher - Sunnyvale CA, US
David K. Jensen - Sunnyvale CA, US
Maynard C. Harding - Menlo Park CA, US
Randall D. Robinson - San Jose CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

H01J 35/08

US Classification:

378143

Abstract:

An X-ray target assembly includes a substrate, a target supported by the substrate adapted to generate X-rays when impinged by an electron beam, and an enclosure over the target providing a volume for the target. The enclosure is made of a material substantially transparent to electrons. The volume is substantially vacuum or filled with an inert gas.

US Patent:

8098796, Jan 17, 2012

Filed:

Oct 1, 2010

Appl. No.:

12/896831

Inventors:

Richard Schumacher - Sunnyvale CA, US
David K. Jensen - Sunnyvale CA, US
Maynard C. Harding - Menlo Park CA, US
Randall D. Robinson - San Jose CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

H01J 35/08

US Classification:

378143

Abstract:

An X-ray target assembly includes a substrate, a target supported by the substrate adapted to generate X-rays when impinged by an electron beam, and an enclosure over the target providing a volume for the target. The enclosure is made of a material substantially transparent to electrons. The volume is substantially vacuum or filled with an inert gas.

US Patent:

20110268498, Nov 3, 2011

Filed:

Apr 30, 2010

Appl. No.:

12/771227

Inventors:

Randall Robinson - Herndon VA, US

International Classification:

F16B 7/00
B23P 17/04

US Classification:

403356, 29428

Abstract:

A preform having a shape including a surface for bearing against a flatted shaft and a surface approximating the shape of a cylindrical portion of an exterior lateral surface of the shaft and having a protrusion thereon which is generally complementary to a keyway in a fixture to be attached to the shaft forms a universal substitute for conventional key and keyway joints between a shaft and a fixture. The joint formed using the preform is stronger, more robust and more resistant to damage and/or wear during use than a key and keyway joint while formation as a preform allows application to a wider variety of applications while facilitating repairs and allowing repairs to be performed in the field with easily portable hand or power tools.

US Patent:

49504495, Aug 21, 1990

Filed:

Feb 26, 1988

Appl. No.:

7/160725

Inventors:

George E. Petersen - Fremont CA
Randall N. Robinson - San Jose CA
Carl P. Ruiz - Fremont CA
William J. Marble - Gilroy CA
Barry M. Gordon - Monte Sereno CA
Gerald M. Gordon - Soquel CA

Assignee:

General Electric Company - San Jose CA

International Classification:

G21C 900

US Classification:

376306

Abstract:

Deposition of radioactive cobalt on the interior surfaces of a water-cooled nuclear reactor and intergranular stress corrosion cracking are inhibited or substantially prevented by the continuous injection of zinc oxide to the reactor water. The zinc oxide may be prepared in the form of a paste, a slurry, or a preformed aqueous solution.

US Patent:

47599006, Jul 26, 1988

Filed:

Aug 27, 1986

Appl. No.:

6/900927

Inventors:

George E. Peterson - Fremont CA
Randall N. Robinson - San Jose CA
Carl P. Ruiz - Fremont CA

Assignee:

General Electric Company - San Jose CA

International Classification:

G21C 900

US Classification:

376306

Abstract:

Deposition of radioactive cobalt on the interior surfaces of a water-cooled nuclear reactor is inhibited or substantially prevented by the continuous injection of zinc oxide to the reactor water. The zinc oxide may be prepared in the form of a paste, a slurry, or a preformed aqueous solution.

US Patent:

55828124, Dec 10, 1996

Filed:

Jan 13, 1995

Appl. No.:

8/372086

Inventors:

George E. Petersen - Fremont CA
Randall N. Robinson - San Jose CA

Assignee:

General Electric Company - San Jose CA

International Classification:

C01G 902

US Classification:

423622

Abstract:

A vapor of diethylzinc or dimethylzinc is reacted with water vapor to form very small particles of depleted zinc oxide which are entrained in the gas flow. In accordance with one version of the method, a spray nozzle is used to mix liquid diethylzinc with dry nitrogen to prevent combustion. The nozzle sprays the diluted diethylzinc into a chamber heated up to its boiling point of 118. degree. C. to completely vaporize the diethylzinc. The diluted diethylzinc gas is then reacted with water vapor to form a fume of very small zinc oxide particles entrained in ethane gas without combustion. A similar process can be used to convert dimethylzinc into depleted zinc oxide powder. In accordance with another version of the process, an inert gas stream is saturated with diethylzinc or dimethylzinc vapor by passing a dry inert gas through a vessel containing liquid diethylzinc or dimethylzinc. A second inert gas stream is saturated with water vapor in a similar manner. These two gas streams will chemically react to form a fume of very small zinc oxide particles.

US Patent:

53913540, Feb 21, 1995

Filed:

Aug 30, 1993

Appl. No.:

8/112923

Inventors:

George E. Petersen - Fremont CA
Randall N. Robinson - San Jose CA

Assignee:

General Electric Company - San Jose CA

International Classification:

C01G 902

US Classification:

422129

Abstract:

A vapor of diethylzinc or dimethylzinc is reacted with water vapor to form very small particles of depleted zinc oxide which are entrained in the gas flow. In accordance with one version of the method, a spray nozzle is used to mix liquid diethylzinc with dry nitrogen to prevent combustion. The nozzle sprays the diluted diethylzinc into a chamber heated up to its boiling point of 118. degree. C. to completely vaporize the diethylzinc. The diluted diethylzinc gas is then reacted with water vapor to form a fume of very small zinc oxide particles entrained in ethane gas without combustion. A similar process can be used to convert dimethylzinc into depleted zinc oxide powder. In accordance with another version of the process, an inert gas stream is saturated with diethylzinc or dimethylzinc vapor by passing a dry inert gas through a vessel containing liquid diethylzinc or dimethylzinc. A second inert gas stream is saturated with water vapor in a similar manner. These two gas streams will chemically react to form a fume of very small zinc oxide particles.