Dan A Gross

US Patent:

60023163, Dec 14, 1999

Filed:

May 13, 1998

Appl. No.:

9/079090

Inventors:

Peter M. McIntyre - College Station TX
Weijun Shen - Oak Ridge TN
Nick Diaczenko - College Station TX
Dan A. Gross - College Station TX

Assignee:

The Texas A&M University System - College Station TX

International Classification:

H01H 606

US Classification:

335216

Abstract:

A superconducting coil (12) having a plurality of superconducting layers (18) is provided. Each superconducting layer (18) may have at least one superconducting element (20) which produces an operational load. An outer support structure (24) may be disposed outwardly from the plurality of layers (18). A load transfer system (22) may be coupled between at least one of the superconducting elements (20) and the outer support structure (24). The load transfer system (22) may include a support matrix structure (30) operable to transfer the operational load from the superconducting element (20) directly to the outer support structure (24). A shear release layer (40) may be disposed, in part, between the superconducting element (20) and the support matrix structure (30) for relieving a shear stress between the superconducting element (20) and the support matrix structure (30). A compliant layer (42) may also be disposed, in part, between the superconducting element (20) and the support matrix structure (30) for relieving a compressive stress on the superconducting element (20).

US Patent:

51677156, Dec 1, 1992

Filed:

Mar 4, 1991

Appl. No.:

7/664155

Inventors:

Ahmed K. Kalafala - Albany NY
Karl F. Schoch - Scotia NY
Dan A. Gross - Schenectady NY
Evangelos T. Laskaris - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

B05C 302
B05C 1111

US Classification:

118712

Abstract:

A method and apparatus for impregnating the superconductors on a superconductor winding with epoxy such that a vacuum/pressure containment vessel, in which the winding is placed, allows epoxy to be introduced into the vessel whereby the epoxy eventually impregnates the superconductors through the application of various evacuating, pressuring and epoxy transporting steps.

US Patent:

49566083, Sep 11, 1990

Filed:

May 1, 1989

Appl. No.:

7/345333

Inventors:

Bizhan Dorri - Clifton Park NY
Dan A. Gross - Schenectady NY
Lembit Salasoo - Delanson NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01R 3320

US Classification:

324319

Abstract:

In one aspect of the present invention a superconductive magnet for use in a magnetic resonance imaging and spectroscopy is provided. The magnet comprises a cylindrical coil form having a plurality of superconductive coils situated coaxially on the cylinder, spaced apart from one another. A plurality of pairs of thermal bridges each comprising a bar shaped section connecting a first and second end portion is also provided. The first end section has a greater surface are than the second end section. Each of the pairs of thermal bridges is situated between a respective pair of adjacent coils. The bar section of each of the thermal bridges extends axially between the adjacent coils. In each pair, the first end of one of the pair and the second end of the other of the pair are in thermal contact with one of the adjacent coils, the second end of one of the pair and the first end of the other of the pair are in thermal contact with the other coil of the adjacent pair. Each of the thermal bridges act as a heat flux amplifier in an opposite direction between the adjacent coils due to different end portion areas in contact with the adjacent coils.

US Patent:

59949015, Nov 30, 1999

Filed:

May 13, 1998

Appl. No.:

9/078900

Inventors:

Peter M. McIntyre - College Station TX
Weijun Shen - Oak Ridge TN
Dan A. Gross - College Station TX

Assignee:

Global Petroleum Resouces Institute - College Station TX

International Classification:

G01V 300

US Classification:

324303

Abstract:

A magnetic resonance logging instrument is provided. The magnetic resonance logging instrument (10) may comprise a superconducting magnet system (12) operable to produce a static magnetic field and disposed within a housing (19). An antenna system (14) operable to produce and sense a radio frequency magnetic field may be disposed, in part, within the housing (19) and coupled to the superconducting magnet system (12). A cryogenic cooling system (16) operable to cool the superconducting magnet system (12) may also be disposed within the housing (19). A power system (18) operable to supply power to the superconducting magnet system (12), the antenna system(14), and the cryogenic cooling system(16) may also be provided.

US Patent:

55304133, Jun 25, 1996

Filed:

Oct 20, 1995

Appl. No.:

8/546030

Inventors:

Constantinos Minas - Slingerlands NY
Dan A. Gross - Niskayuna NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01F 722

US Classification:

335216

Abstract:

A superconductive magnet having a superconductive coil located within a thermal shield located within a vacuum enclosure. A magnet re-entrant support assembly includes an outer support cylinder located between the vacuum enclosure and the thermal shield and includes an inner support cylinder located between the thermal shield and the superconductive coil. The outer support cylinder's first end is rigidly connected to the vacuum enclosure, and its second end is rigidly connected to the thermal shield. The inner support cylinder's first terminus is rigidly connected to the thermal shield near the outer support cylinder's second end, and its second terminus is located longitudinally between the outer support cylinder's first and second ends and is rigidly connected to the superconductive coil. Buckling resistance is improved by adding stiffening rings to the support cylinders.

US Patent:

57319391, Mar 24, 1998

Filed:

Sep 4, 1996

Appl. No.:

8/707551

Inventors:

Dan Arthur Gross - Niskayuna NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02H 900

US Classification:

361 19

Abstract:

A quench-protecting superconductive-magnet electrical circuit. An impregnated superconductive-switch wire is coupled to the leads of a cryostable superconductive-coil assemblage having series-coupled coil portions. Series-coupled fan-in resistive heaters are also coupled in parallel with corresponding coil portions and are positioned thermally proximate the superconductive-switch wire. Fan-out resistive heaters are coupled in parallel with corresponding coil portions and are positioned thermally proximate corresponding coil portions. A local quench in one coil portion activates its corresponding fan-in resistive heater which quenches the superconductive-switch wire which activates all of the fan-out resistive heaters which globally quenches all of the coil portions thereby preventing local quench damage.

US Patent:

52277208, Jul 13, 1993

Filed:

Apr 2, 1992

Appl. No.:

7/862148

Inventors:

Dan A. Gross - Niskayuna NY
Mark E. Vermilyea - Niskayuna NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01R 3312
G01R 2700
G01N 2704
G01N 2772

US Classification:

324235

Abstract:

This invention relates to an apparatus and method for measuring the resistance of superconductors. Structures of this type, generally, allow the resistance of the superconductor to be accurately measured in a non-destructive manner by using a bifilar coil which includes an integrated loop/switch formed from the bifilar coil.

US Patent:

45231664, Jun 11, 1985

Filed:

Oct 19, 1984

Appl. No.:

6/662744

Inventors:

Dan A. Gross - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01F 722

US Classification:

335216

Abstract:

A method for operating magnet correction coils is provided through the control of correction coil currents. The currents are determined from field measurements through the use of an iterative weighting algorithm. The algorithm is iterative and adjusts the weights at each iteration so as to reduce the range of variation.