Patents by Inventor John J A Cullen

John J A Cullen 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).

  • Patent number: 10929603
    Abstract: An aspect of auto-completion of text entered by a user includes configurable data collection components that collect from software applications text data and metadata representing an initial state of each of the applications and text data and metadata representing changes to the state of one or more of the applications. A central text matching component receives and stores the text data and metadata. A sending component sends text entered by the user in a text-entry field and any metadata associated with it to the central text matching component. A comparison component compares the entered text and associated metadata to the stored text data and metadata and locates matching text strings. A weighted ordering component ranks the matching text strings using the metadata and its configuration settings. A completion component completes the entered text at the text-entry field based on a selection of one of the located matching text strings.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: February 23, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: David R. Bell, Peter J. Cullen, John W. Duffell, Darren J. Sullivan
  • Patent number: 10680503
    Abstract: An electrical machine including a rotor and a stator, at least one of the rotor and stator being provided with superconducting first electrical windings; and a set of one or more screen electrical windings, provided in the form of one or more further superconducting electrical windings, arranged around and radially outward of the first electrical windings; wherein the set of screen electrical windings is arranged to be supplied with an electrical current for generating a magnetic field of suitable magnitude and phase to reduce the magnitude of the magnetic field, generated at least by the first electrical windings during operation of the electrical machine, radially outwards of the screen electrical windings.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: June 9, 2020
    Assignee: ROLLS-ROYCE plc
    Inventors: Stephen Williamson, Alexander C Smith, John J A Cullen, Ellis F H Chong
  • Patent number: 10485145
    Abstract: This invention concerns a cryo-cooled electrical conduction network. The conduction network has an electrical network divided into two or more conductive sections, each section comprising electrical equipment (24, 28). The conductive network also has a coolant network for maintaining the temperature of a coolant in each section. The electrical equipment (24, 28) and a corresponding portion of the coolant network of each section is housed in a section enclosure (10, 12, 14). The coolant network includes a coolant interface (40) located between each section, wherein the coolant interface (40) is housed in an intermediate enclosure (16, 18, 20, 22) that is isolatable from the section enclosures (10, 12, 14) in the electrical conduction network.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: November 19, 2019
    Assignee: ROLLS-ROYCE plc
    Inventor: John J A Cullen
  • Publication number: 20170253902
    Abstract: There is described a method for assaying for loss of viability of a photosynthetic organism (preferably a microorganism) in an aqueous liquid. In a preferred embodiment, the method comprises the step of using fluorescence to correlate the photorepair index for the organism in the aqueous liquid to survivorship of the organism (preferably a microorganism) after it is exposed to ultraviolet radiation, thereby assessing viability.
    Type: Application
    Filed: December 15, 2014
    Publication date: September 7, 2017
    Inventors: Hugh L. MacIntyre, John J. Cullen
  • Publication number: 20170163135
    Abstract: A method of manufacturing an induction motor rotor assembly, the method includes the steps of: providing a rotor; machining a plurality of re-entrant slots axially along an outer surface of the rotor; positioning a sleeve concentrically over the outer surface of the rotor; applying a friction stir welding process to the sleeve along each re-entrant slot axially along the outer surface of the rotor to cause the sleeve material to plasticise and flow into the axial re-entrant slot to form an axial re-entrant slot bar; and providing an electrical connection at each of the opposing axial ends of the rotor between respective ones of opposing ends of each of the axial re-entrant slot bars to thereby form the induction motor rotor.
    Type: Application
    Filed: November 21, 2016
    Publication date: June 8, 2017
    Applicant: ROLLS-ROYCE plc
    Inventors: James EMBERTON, Alexis LAMBOURNE, John J A CULLEN
  • Publication number: 20170127578
    Abstract: This invention concerns a cryo-cooled electrical conduction network. The conduction network has an electrical network divided into two or more conductive sections, each section comprising electrical equipment (24, 28). The conductive network also has a coolant network for maintaining the temperature of a coolant in each section. The electrical equipment (24, 28) and a corresponding portion of the coolant network of each section is housed in a section enclosure (10, 12, 14). The coolant network includes a coolant interface (40) located between each section, wherein the coolant interface (40) is housed in an intermediate enclosure (16, 18, 20, 22) that is isolatable from the section enclosures (10, 12, 14) in the electrical conduction network.
    Type: Application
    Filed: October 5, 2016
    Publication date: May 4, 2017
    Applicant: ROLLS-ROYCE plc
    Inventor: John J. A. CULLEN
  • Publication number: 20170040881
    Abstract: An electrical machine including a rotor and a stator, at least one of the rotor and stator being provided with superconducting first electrical windings; and a set of one or more screen electrical windings, provided in the form of one or more further superconducting electrical windings, arranged around and radially outward of the first electrical windings; wherein the set of screen electrical windings is arranged to be supplied with an electrical current for generating a magnetic field of suitable magnitude and phase to reduce the magnitude of the magnetic field, generated at least by the first electrical windings during operation of the electrical machine, radially outwards of the screen electrical windings.
    Type: Application
    Filed: July 7, 2016
    Publication date: February 9, 2017
    Applicant: ROLLS-ROYCE plc
    Inventors: Stephen WILLIAMSON, Alexander C. SMITH, John J A CULLEN, Ellis F H CHONG
  • Patent number: 9236830
    Abstract: An electrical machine includes a stator including a plurality of electrical phases and a rotor having a plurality of magnets. Each electrical phase includes at least one coil and power electronics. There are means to detect an electrical short circuit in a faulted coil and means to supply an electrical current to the faulted coil when an electrical short circuit is detected in the faulted coil. The means to supply the electrical current to the faulted coil includes one or more un-faulted electrical phases of the electrical machine. The un-faulted electrical phases of the electrical machine are arranged to supply the electrical current to the electrical phase containing the faulted coil. The power electronics of the un-faulted electrical phases are arranged to supply the electrical current from the un-faulted electrical phase to the power electronics of the electrical phase having the faulted coil. This overcomes a problem of a fault in the DC or AC busbar of the electrical machine.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: January 12, 2016
    Assignee: ROLLS-ROYCE plc
    Inventor: John J A Cullen
  • Patent number: 9018805
    Abstract: A machine such as a ship's engine has a superconducting component requiring cooling for its operation, and includes a cooling system. The cooling system is operable in first and second modes. In a cool-down phase the cooling system is run in the first mode providing relatively high heat transfer from the superconducting component. On attainment of a desired operating temperature the cooling system is run in the second mode, providing lower heat transfer. This enables a reduced cool-down time of the machine, while allowing economical operation in normal service. The higher level of cooling in the first mode used during the start-up procedure can involve a colder cryogen, or a greater flow of coolant. One way of achieving the latter is to circulate the coolant in normally evacuated regions during the cool-down phase, and then re-establishing the vacuum in these regions for normal service operation.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: April 28, 2015
    Assignee: Rolls-Royce PLC
    Inventors: John J. A. Cullen, David S. Knott
  • Patent number: 8653797
    Abstract: A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximize the torque ripple-free power output of the synchronous electrical machine.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: February 18, 2014
    Assignee: Rolls-Royce PLC
    Inventors: John J. A. Cullen, David R. Trainer, Stephen A. Long, Angus G. L. Moodie
  • Patent number: 8648575
    Abstract: An electrical machine system including a permanent magnet assembly having a magnetic field and a plurality of conductive coils, the magnet assembly and coils arranged for relative rotation between the coils and magnetic field in the manner of an electrical generator or motor, the system further comprising a current injector electrically connected to said coils and arranged selectively to supply a current signal thereto, the current signal being asynchronous with the frequency of rotation between the permanent magnet assembly and coils so as to heat and thereby demagnetise one or more magnet within said permanent magnet assembly.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: February 11, 2014
    Assignee: Rolls-Royce PLC
    Inventors: John J A Cullen, Geraint W Jewell
  • Patent number: 8395346
    Abstract: A synchronous electrical machine having a plurality of phases, a detecting unit arranged to detect a fault in at least one of the phases of the synchronous electrical machine, an isolating unit arranged to isolate the at least one phase of the synchronous electrical machine with the fault, a phase shift unit arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine to adjust the phase angle and magnitude of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: March 12, 2013
    Assignee: Rolls-Royce PLC
    Inventors: David R Trainer, John J A Cullen, Alan J Mitcham, Andrew M Cross, Andrew J Forsyth, Ahmed A-M Abdel-Hafez
  • Patent number: 8350656
    Abstract: A rotary transformer includes a primary core having a primary coil wound thereon, and a secondary core having a secondary coil wound thereon, the cores being mounted for relative rotation about an axis of rotation. The transformer is characterized in that one of the cores includes a plurality of core segments arranged in spaced-apart relation relative to one another in a substantially circular array about the axis, and the other core has a substantially annular configuration. In a particular embodiment, the primary core is fixed and hence remains static during operation, and includes a plurality of spaced apart core segments arranged in a circular array around the axis.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: January 8, 2013
    Assignee: Rolls-Royce PLC
    Inventors: John J A Cullen, Ellis F H Chong, Felix L Langley
  • Publication number: 20120286617
    Abstract: A superconducting electrical machine 1 such as a ship's engine has a rotor 10 and a stator 30, the rotor having superconductive windings 15. The rotor 10 includes an additional normally-conducting winding 55 in parallel to the superconducting winding 15 but not normally connected. In the event of a fault in the superconducting winding 15, the additional winding 55 can take a sufficient current to run the engine to maintain mobility of the ship. Moreover, while this normally-conducting operation is under way, the heat generated warms the cooled engine ready for maintenance.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 15, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventors: John J.A CULLEN, Michael P. HIRST
  • Publication number: 20120248903
    Abstract: A machine such as a ship's engine has a superconducting component 15 requiring cooling for its operation, and includes a cooling system 40. The cooling system is operable in first and second modes. In a cool-down phase the cooling system is run in the first mode providing relatively high heat transfer from the superconducting component. On attainment of a desired operating temperature the cooling system is run in the second mode, providing lower heat transfer. This enables a reduced cool-down time of the machine, while allowing economical operation in normal service. The higher level of cooling in the first mode used during the start-up procedure can involve a colder cryogen, or a greater flow of coolant. One way of achieving the latter is to circulate the coolant in normally evacuated regions 16 during the cool-down phase, and then re-establishing the vacuum in these regions for normal service operation.
    Type: Application
    Filed: March 21, 2012
    Publication date: October 4, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventors: John J. A. CULLEN, David S. KNOTT
  • Publication number: 20120249029
    Abstract: An electrical machine includes a stator including a plurality of electrical phases and a rotor having a plurality of magnets. Each electrical phase includes at least one coil and power electronics. There are means to detect an electrical short circuit in a faulted coil and means to supply an electrical current to the faulted coil when an electrical short circuit is detected in the faulted coil. The means to supply the electrical current to the faulted coil includes one or more un-faulted electrical phases of the electrical machine. The un-faulted electrical phases of the electrical machine are arranged to supply the electrical current to the electrical phase containing the faulted coil. The power electronics of the un-faulted electrical phases are arranged to supply the electrical current from the un-faulted electrical phase to the power electronics of the electrical phase having the faulted coil. This overcomes a problem of a fault in the DC or AC busbar of the electrical machine.
    Type: Application
    Filed: November 18, 2010
    Publication date: October 4, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventor: John J.A. Cullen
  • Publication number: 20110285491
    Abstract: A rotary transformer is disclosed which includes a primary core having a primary coil wound thereon, and a secondary core having a secondary coil wound thereon, wherein said cores are mounted for relative rotation about an axis of rotation. One of said cores includes a plurality of core segments arranged in spaced-apart relation relative to one another in a substantially circular array about said axis, the other core having a substantially annular configuration. In a particular embodiment, said primary core is fixed and hence remains static during operation, and includes a plurality of spaced apart core segments arranged in a circular array around said axis.
    Type: Application
    Filed: January 8, 2010
    Publication date: November 24, 2011
    Applicant: ROLLS-ROYCE PLC
    Inventors: John J. A. Cullen, Ellis F. H. Chong, Felix L. Langley
  • Publication number: 20110234180
    Abstract: An electrical machine system including a permanent magnet assembly having a magnetic field and a plurality of conductive coils, the magnet assembly and coils arranged for relative rotation between the coils and magnetic field in the manner of an electrical generator or motor, the system further comprising a current injector electrically connected to said coils and arranged selectively to supply a current signal thereto, the current signal being asynchronous with the frequency of rotation between the permanent magnet assembly and coils so as to heat and thereby demagnetise one or more magnet within said permanent magnet assembly.
    Type: Application
    Filed: March 28, 2011
    Publication date: September 29, 2011
    Applicant: ROLLS-ROYCE PLC
    Inventors: John J. A. CULLEN, Geraint W. JEWELL
  • Publication number: 20110080000
    Abstract: A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximise the torque ripple-free power output of the synchronous electrical machine.
    Type: Application
    Filed: May 12, 2009
    Publication date: April 7, 2011
    Applicant: ROLLS-ROYCE PLC
    Inventors: John J. A. Cullen, David R. Trainer, Stephen A. Long, Angus G. L. Moodie
  • Publication number: 20100117569
    Abstract: A synchronous electrical machine comprising a plurality of phases, detecting means arranged to detect a fault in at least one of the phases of the synchronous electrical machine, isolating means arranged to isolate the at least one phase of the synchronous electrical machine with the fault, phase shift means arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine to adjust the phase angle and magnitude of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero.
    Type: Application
    Filed: June 13, 2008
    Publication date: May 13, 2010
    Applicant: Rolls-Royce PLC
    Inventors: David R. Trainer, John J.A. Cullen, Alan J. Mitcham, Andrew M. Cross, Andrew J. Forsyth, Ahmed A-M Abdel-Hafez