John P Stevenson

US Patent:

8544633, Oct 1, 2013

Filed:

Mar 18, 2011

Appl. No.:

13/052000

Inventors:

John S. Stevenson - Anaheim CA, US
Derek L. Aldred - Granada Hills CA, US
Jeffery A. Rader - Burbank CA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B65G 17/36

US Classification:

198708, 198707, 198704

Abstract:

A system is provided with a segmented solid feed pump having a plurality of pump segments disposed along a closed-loop path. The plurality of pump segments are coupled together in series along the closed-loop path, and the plurality of pump segments move along the closed-loop path. Furthermore, each pump segment includes a holding receptacle.

US Patent:

8579103, Nov 12, 2013

Filed:

Oct 3, 2011

Appl. No.:

13/252044

Inventors:

John Saunders Stevenson - Anaheim CA, US
Derek Leslie Aldred - Granada Hills CA, US
Jeffrey Allen Rader - Burbank CA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B65G 17/12
B65G 31/02
B65G 31/04
B65G 19/16

US Classification:

198716, 198640, 198642, 198701, 198705, 198617, 406 99

Abstract:

A system includes a solid feed pump configured to transport a solid feedstock. The solid feed pump includes at least one passage for the transport of the solid feedstock. The solid feed pump also includes at least one movable wall configured to move along the passage. The solid feed pump further includes a retractable gripping element configured to extend from the at least one movable wall into the at least one passage to grip a portion of the solid feedstock. In addition, the retractable gripping element is configured to retract away from the at least one passage.

US Patent:

20110235777, Sep 29, 2011

Filed:

Feb 23, 2011

Appl. No.:

13/033590

Inventors:

Tsahi Gozani - Palo Alto CA, US
Joseph Bendahan - San Jose CA, US
Craig Mathew Brown - Santa Clara CA, US
Willem Gerhardus Johannes Langeveld - Menlo Park CA, US
John David Stevenson - Livermore CA, US

International Classification:

G01N 23/06

US Classification:

378 53

Abstract:

The application discloses systems and methods for X-ray scanning for identifying material composition of an object being scanned. The system includes at least one X-ray source for projecting an X-ray beam on the object, where at least a portion of the projected X-ray beam is transmitted through the object, and an array of detectors for measuring energy spectra of the transmitted X-rays. The measured energy spectra are used to determine atomic number of the object for identifying the material composition of the object. The X-ray scanning system may also have an array of collimated high energy backscattered X-ray detectors for measuring the energy spectrum of X-rays scattered by the object at an angle greater than 90 degrees, where the measured energy spectrum is used in conjunction with the transmission energy spectrum to determine atomic numbers of the object for identifying the material composition of the object.

US Patent:

20120155592, Jun 21, 2012

Filed:

Feb 25, 2011

Appl. No.:

13/035886

Inventors:

Tsahi Gozani - Palo Alto CA, US
Michael Joseph King - Hillsborough CA, US
Timothy John Shaw - Oakland CA, US
John David Stevenson - Livermore CA, US

International Classification:

G01T 3/00

US Classification:

376154

Abstract:

The present specification discloses a system for detecting nuclear material based on at least one source of probing radiation and the radiation signatures generated from interrogating an object under inspection. In addition, the present specification describes a threshold-activation detector capable of detecting prompt neutrons, via the activation, after the source's blinding radiation has stopped. The threshold-activation detector can be manufactured from liquid fluorocarbons that allow for the detection of beta radiation and gamma rays.

US Patent:

20130192137, Aug 1, 2013

Filed:

Jan 27, 2012

Appl. No.:

13/360542

Inventors:

John Saunders Stevenson - Anaheim CA, US
Shashishekara Sitharamarao Talya - Humble TX, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

B01J 7/00
C10J 3/46

US Classification:

48 61, 48197 R

Abstract:

A system includes a gasifier injector configured to inject a heat control fuel and a mixed air into a gasifier for combustion during a heat control mode. The heat control fuel is the same or different from the gasification fuel, and the system is configured to create the mixed air from independent supplies of oxygen and nitrogen.

US Patent:

20130192139, Aug 1, 2013

Filed:

Jan 27, 2012

Appl. No.:

13/360521

Inventors:

John Saunders Stevenson - Anaheim CA, US
Shashishekara Sitharamarao Talya - Humble TX, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

C10J 3/46
B01J 7/00

US Classification:

48197 R, 48 61

Abstract:

A system includes a gasifier configured to gasify a gasification fuel during a gasification mode. The system also includes a first injector configured to inject a heat control fuel and an oxygen enriched air into the gasifier for combustion during a heat control mode. The heat control fuel is the same or different from the gasification fuel, and the oxygen enriched air includes air enriched with additional oxygen.

US Patent:

48285790, May 9, 1989

Filed:

Mar 7, 1988

Appl. No.:

7/164750

Inventors:

Michael W. Becker - Westminster CA
Allen M. Robin - Montebello CA
John S. Stevenson - Montebello CA

International Classification:

C10J 348

US Classification:

48 69

Abstract:

Reactor for gasifying a carbonaceous fuel to produce a usable gas, and comprising an insulated outer shell. A reaction chamber within the shell receives a fuel mixture from an injection burner. The products or effluent of gasification include hot produced gases which are passed through a constricted throat to be cooled in a liquid bath. A dip tube, which guides the hot effluent into the bath, is provided with a stream of coolant from a quench ring. The latter is supported below the reaction chamber and is provided with a thermal barrier along its surface that is exposed to the hot produced gas. The barrier will reduce thermal stress in the quench ring and reduce drain of heat from the gasifier throat, thus avoiding premature chilling of the slag component.

US Patent:

D3170098, May 21, 1991

Filed:

May 10, 1989

Appl. No.:

7/349802

Inventors:

John E. Stevenson - Glendale CA

US Classification:

D14249