Patents by Inventor Graham Gilgrass
Graham Gilgrass has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8154830Abstract: A superconducting magnet assembly comprises a superconducting magnet which, under working conditions, generates a magnetic field in a working volume. The superconducting magnet is connected in parallel with a series combination of a superconducting fault current limiter and a resistor, and with a DC power source. Under working conditions, the magnet can be energized by the power source to generate a desired magnetic field in the working volume.Type: GrantFiled: February 29, 2008Date of Patent: April 10, 2012Assignee: Siemens plcInventors: Graham Gilgrass, M'Hamed Lakrimi, Adrian Mark Thomas
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Patent number: 7859375Abstract: An electromagnet comprising a plurality of coils of superconductive material, monolithically embedded in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet, and a method for producing an electromagnet comprising a plurality of coils of superconductive material, comprising the steps of winding coils of superconductive material, retaining the coils at predetermined relative positions, and monolithically embedding the plurality of superconducting coils in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet.Type: GrantFiled: April 1, 2008Date of Patent: December 28, 2010Assignee: Siemens PlcInventors: Andrew Farquhar Atkins, Graham Gilgrass, Andrew James Gray
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Publication number: 20100073115Abstract: A superconducting magnet assembly comprising a superconducting magnet (1) which, under working conditions, generates a magnetic field in a working volume, the superconducting magnet being connected in parallel with a series combination of a superconducting fault current limiter (7) and a resistor (5). The magnet is further connected in parallel to a DC power source (4) whereby under working conditions, the magnet can be energised by the power source to generate a desired magnetic field in the working volume.Type: ApplicationFiled: February 29, 2008Publication date: March 25, 2010Applicant: Siemens picInventors: Graham Gilgrass, M'Hamed Lakrimi, Adrian Mark Thomas
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Patent number: 7616083Abstract: A resin-impregnated superconducting magnet coil comprising a number of turns of superconducting wire (14) embedded within a resin (16) having an outer filler layer (18) composed of the resin, filled with filler material (20). The coil further comprises a cooling layer (22) interposed between the superconducting wire (14) and the filler layer (18).Type: GrantFiled: November 13, 2006Date of Patent: November 10, 2009Assignee: Siemens Magnet Technology Ltd.Inventor: Graham Gilgrass
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Patent number: 7497086Abstract: The present provides a cryogenic thermal battery arrangement for maintaining a superconducting magnet coil or similar apparatus at cryogenic temperature for a required shipping period, such as thirty days, without consuming a significant amount of costly cryogen. According to another aspect, the invention allows extended shipping periods without incurring excessive costs.Type: GrantFiled: February 8, 2006Date of Patent: March 3, 2009Assignee: Siemens Magnet Technology Ltd.Inventors: Andrew Farquhar Atkins, Graham Gilgrass, Wolfgang Stautner
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Publication number: 20090039991Abstract: An electromagnet comprising a plurality of coils of superconductive material, monolithically embedded in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet, and a method for producing an electromagnet comprising a plurality of coils of superconductive material, comprising the steps of winding coils of superconductive material, retaining the coils at predetermined relative positions, and monolithically embedding the plurality of superconducting coils in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet.Type: ApplicationFiled: April 1, 2008Publication date: February 12, 2009Applicant: Siemens Magnet Technology Ltd.Inventors: Andrew Farquhar Atkins, Graham Gilgrass, Andrew James Gray
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Publication number: 20080271467Abstract: A substantially cylindrical cryostat defining an axial imaging region, the cryostat housing a magnet which, in use, provides a substantially homogeneous magnetic field in the imaging region, further comprising a refrigerator arranged to cool certain elements of the cryostat, said refrigerator comprising a magnetic material which, in use, oscillates along an axis of the refrigerator. The cryostat is arranged such that the axis of the refrigerator is substantially tangential to a circle centred on the axis of the cylindrical cryostat.Type: ApplicationFiled: May 12, 2005Publication date: November 6, 2008Applicants: SIEMENS MAGNET TECHNOLOGY LTD, SIEMENS AKTIENGESELLSCHAFTInventors: Graham Gilgrass, Timothy John Hughes, Florian Steinmeyer, Keith White
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Publication number: 20080236176Abstract: A cryogenic refrigerator comprising a rotary valve which controls the flow of high pressure gas into the refrigerator and the return of the gas from the refrigerator, the cryogenic refrigerator further comprising rotary fluid motor arranged to drive the rotary valve.Type: ApplicationFiled: October 2, 2006Publication date: October 2, 2008Applicant: Siemens Magnet Technology LimitedInventors: David Crowley, Graham Gilgrass
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Publication number: 20080115510Abstract: A cryostat cooled by a pulse tube refrigerator and containing electrically powered equipment, wherein an electrical conductor is provided to the electrically powered equipment, said electrical conductor being in thermal and mechanical contact with one or more of the tubes of the pulse tube refrigerator.Type: ApplicationFiled: February 16, 2007Publication date: May 22, 2008Applicant: Siemens Magnet Technology Ltd.Inventors: David Michael Crowley, Graham Gilgrass, Wolfgang Stautner
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Publication number: 20070257754Abstract: A resin-impregnated superconducting magnet coil comprising a number of turns of superconducting wire (14) embedded within a resin (16) having an outer filler layer (18) composed of the resin, filled with filler material (20). The coil further comprises a cooling layer (22) interposed between the superconducting wire (14) and the filler layer (18).Type: ApplicationFiled: November 13, 2006Publication date: November 8, 2007Applicant: Siemens Magnet Technology Ltd.Inventor: Graham Gilgrass
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Publication number: 20060288731Abstract: The present provides a cryogenic thermal battery arrangement for maintaining a superconducting magnet coil or similar apparatus at cryogenic temperature for a required shipping period, such as thirty days, without consuming a significant amount of costly cryogen. According to another aspect, the invention allows extended shipping periods without incurring excessive costs.Type: ApplicationFiled: February 8, 2006Publication date: December 28, 2006Applicant: Siemens Magnet Technology Ltd.Inventors: Andrew Atkins, Graham Gilgrass, Wolfgang Stautner
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Publication number: 20060284711Abstract: An electromagnet comprising a plurality of coils of superconductive material, monolithically embedded in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet, and a method for producing an electromagnet comprising a plurality of coils of superconductive material, comprising the steps of winding coils of superconductive material, retaining the coils at predetermined relative positions, and monolithically embedding the plurality of superconducting coils in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet.Type: ApplicationFiled: May 26, 2006Publication date: December 21, 2006Applicant: Siemens Magnet Technology Ltd.Inventors: Andrew Atkins, Graham Gilgrass, Andrew Gray
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Patent number: 5691678Abstract: A superconducting electromagnet comprising an annular inner helium container vessel within which the windings of an annular magnet are contained, an outer annular vacuum chamber within which the said inner vessel is contained, and a generally annular hollow thermal shield arranged to enclose the inner vessel and disposed between the said vessel and the said chamber in spaced apart relationship so that the longitudinal axes of the said shield and the magnet are substantially co-extensive, an outer wall of the shield being defined by concentric generally cylindrical mutually spaced inner and outer thermal screens, which in combination define a double wall screen, the shield having a double wall only in a region concentric with the longitudinal axis of the magnet.Type: GrantFiled: July 17, 1995Date of Patent: November 25, 1997Assignee: Oxford Magnet Technology LimitedInventors: Russell Peter Gore, Graham Gilgrass
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Patent number: 4818582Abstract: A tension band comprises a number of layers of resin bonded fibre rovings, the rovings in each layer being laterally offset from the rovings in adjacent layers. Methods and apparatus for manufacturing such tension bands are also described.Type: GrantFiled: August 20, 1987Date of Patent: April 4, 1989Assignee: Oxford Magnet Technology LimitedInventor: Graham Gilgrass