Michael H Field

US Patent:

6981309, Jan 3, 2006

Filed:

Oct 13, 2004

Appl. No.:

10/963972

Inventors:

Seung Hong - New Providence NJ, US
Jeff Parrell - Roselle Park NJ, US
Michael Field - Jersey City NJ, US

Assignee:

Oxford Superconducting Technology - Carteret NJ

International Classification:

H01L 39/24

US Classification:

29599, 29825, 1741251, 505928, 505930

Abstract:

An improvement is disclosed in the method for producing a multifilament (Nb, Ti)Sn superconducting wire by the steps of preparing a plurality of Nb or Nb alloy rods where Nb or Nb alloy monofilaments are encased in copper or copper alloy sheaths; packing the Nb or Nb alloy rods within a copper containing matrix to form a packed subelement for the superconducting wire; providing sources of Sn, and sources of Ti within said subelement; assembling the subelements within a further copper containing matrix; and diffusing the Sn and Ti into the Nb or Nb alloy rods to form (Nb, Ti)Sn. The method is improved by diffusing the Ti into the Nb from a minor number of Ti dopant source rods which are distributed among the Nb or Nb alloy rods.

US Patent:

7216418, May 15, 2007

Filed:

Oct 22, 2004

Appl. No.:

10/971722

Inventors:

Seung Hong - New Providence NJ, US
Jeff Parrell - Roselle Park NJ, US
Youzhu Zhang - East Brunswick NJ, US
Michael Field - Jersey City NJ, US

Assignee:

Oxford Superconducting Technology - Carteret NJ

International Classification:

H01L 39/24

US Classification:

29599, 29825, 1741251, 505928, 505930

Abstract:

A method for decreasing the effective magnetic filament sizes for high current internal tin NbSn superconductors. During processing composite rods preferably comprised of copper clad Ta rods of approximately the same dimensions as the hexes in the designed filament billet stack are used as dividers in the subelement. Along with the Ta rods, Ta strips are strategically situated against the Nb or Nb alloy barrier tube which surrounds the subelement. The use of Ta as a spacer instead of copper prevents any reasonable likelihood of bridging of the superconducting phases formed after final reaction.

US Patent:

7368021, May 6, 2008

Filed:

Feb 22, 2005

Appl. No.:

11/063334

Inventors:

Michael Field - Jersey City NJ, US
Jeff Parrell - Roselle Park NJ, US
Youzhu Zhang - East Brunswick NJ, US
Seungok Hong - New Providence NJ, US

Assignee:

Oxford Superconducting Technology - Carteret NJ

International Classification:

H01L 39/24

US Classification:

148 98, 29599, 29825, 1741251

Abstract:

Critical current densities of internal tin wire to the range of 3000 A/mmat temperature of 4. 2 K and in magnetic field 12 T are achieved by controlling the following parameters in a distributed barrier subelement design: wt % Sn in bronze; atomic Nb:Sn; local area ratio; reactable barrier; barrier thickness relative to the filament thickness; additions of a dopant such as Ti or Ta to the NbSn; and the design for restacking and wire reduction to control the maximum filament diameter at the subsequent heat reaction stage.

US Patent:

7562433, Jul 21, 2009

Filed:

Sep 26, 2005

Appl. No.:

11/235705

Inventors:

Seung Hong - New Providence NJ, US
William G. Marancik - Ebony VA, US
Jeff Parrell - Roselle Park NJ, US
Michael Field - Jersey City NJ, US
Kenneth Marken - Cranford NJ, US
Youzhu Zhang - East Brunswick NJ, US

Assignee:

Oxford Superconducting Technology - Carteret NJ

International Classification:

H01L 39/24
B23P 17/00

US Classification:

29599, 294191, 29424, 505230, 505430, 505434, 977762, 977840, 977888

Abstract:

A method for fabrication of nanometer scale metal fibers, followed by optional further processing into cables, yarns and textiles composed of the primary nanofibers. A multicomponent composite is first formed by drilling a billet of matrix metal, and inserting rods of the metal desired as nanofibers. Hexed or round rods can also be inserted into a matrix metal can. The diameter of this composite is then reduced by mechanical deformation methods. This composite is then cut to shorter lengths and reinserted into another billet of matrix metal, and again the diameter is reduced by mechanical deformation. This process of large scale metal stacking followed by mechanical deformation is repeated until the desired fiber size scale is reached, the fibers being contained in the matrix metal. After size reduction, the composite metal wires may be further processed into built up configurations, depending on intended application, by stranding, cabling, braiding, weaving, knitting, felting, etc. , to form yarns or textiles.

US Patent:

7585377, Sep 8, 2009

Filed:

Mar 4, 2008

Appl. No.:

12/074714

Inventors:

Michael Field - Jersey City NJ, US
Jeff Parrell - Roselle Park NJ, US
Youzhu Zhang - East Brunswick NJ, US
Seungok Hong - New Providence NJ, US

Assignee:

Oxford Superconducting Technology - Carteret NJ

International Classification:

H01L 39/04

US Classification:

148 98, 29599, 29825, 1741251

Abstract:

Critical current densities of internal tin wire having values of at least 2000 A/mmat temperature of 4. 2 K and in magnetic field of 12 T are achieved by controlling the following parameters in a distributed barrier subelement design: wt % Sn in bronze; atomic Nb:Sn; local area ratio; reactable barrier; and barrier thickness relative to the filament thickness; and the design for restacking and wire reduction to control the maximum filament diameter at the subsequent heat reaction stage.

US Patent:

7725756, May 25, 2010

Filed:

Jan 4, 2007

Appl. No.:

11/649740

Inventors:

Javier Solis - Sunnyvale CA, US
Xuduan Lin - Newark CA, US
Michael Field - Redwood City CA, US

Assignee:

GoBack TV, Inc. - Menlo Park CA

International Classification:

G06F 1/06

US Classification:

713501, 713502, 713600, 326 96, 327291

Abstract:

A method for generating a wide range of clock rates from a single clock. A delta is generated from a first clock signal and a second clock signal. An accumulative offset is generated from adding the delta to a previous accumulative offset for each clock period of the first clock signal. Whenever an overflow is encountered, the value of the accumulative offset is truncated. The second clock signal is interpolated between adjacent values.

US Patent:

7809942, Oct 5, 2010

Filed:

Apr 5, 2005

Appl. No.:

11/098787

Inventors:

Paul Baran - Atherton CA, US
Xu Duan Lin - Freemont CA, US
John Pickens - Newark CA, US
Michael Field - Milpitas CA, US

Assignee:

GoBack TV, Inc. - Menlo Park CA

International Classification:

H04L 29/06

US Classification:

713160, 725 25, 380201, 380210, 380255, 380277

Abstract:

A conditional access method and apparatus for use with a system for controlling of digital TV program start time. Subscriber access is authorized to digital program streams. Content are divided into a plurality of working periods. Each working period of the plurality of working periods is scrambled with a different working key. A working key of a given period is delivered ahead of the given period. The working key is synchronized with scrambling control bits in an header. working keys are inserted into an entitlement control message (ECM) packet, and the ECM packet is encrypted using a service key. A time period is inserted into the ECM packet during which the service key is valid. A service key is inserted in an entitlement.

US Patent:

8191101, May 29, 2012

Filed:

Sep 17, 2009

Appl. No.:

12/562001

Inventors:

Paul Baran - Atherton CA, US
Xu Duan Lin - Newark CA, US
John Pickens - Newark CA, US
Michael Field - Redwood City CA, US

Assignee:

Aurora Networks, Inc. - Santa Clara CA

International Classification:

H04N 7/173

US Classification:

725118, 725 88, 725 90

Abstract:

A system for the delivery of video on demand (VOD). A wireless remote control device generates keystroke signals for controlling a TV display and has a single button for restarting a selected program at a beginning of the selected program. A head-end unit supports separate downstream virtual channels for each separate TV set connected on a common TV feeder-cable; The head-end unit locally records and stores many programs, and transmits each program using a compressed digital format. The Compressed digital format may use MPEG-2 or MPEG-4. The head-end unit has means for protecting against signal theft. A set top unit encapsulates the keystroke signals and transmits the keystroke signals via a two-way channel to the head-end unit.