Patents by Inventor David A. Hodgson

David A. Hodgson 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).

  • Publication number: 20220149756
    Abstract: A method of controlling a switched reluctance motor is disclosed herein. The motor composes a stator carrying a plurality of phase windings and a rotor. The method comprises activating the phase windings in a sequence selected to apply torque to the rotor. Wherein during a cycle of rotation of the rotor the phase windings switch between an active state in which current in the phase winding applies torque to the rotor and an inactive state, applying a voltage to a selected phase winding whilst the selected phase winding is in the inactive state to provide a flux in the selected phase winding: determining the current in the selected phase winding; determining the rotor angle based on the current and the flux, and controlling said activating based on the rotor angle.
    Type: Application
    Filed: January 16, 2022
    Publication date: May 12, 2022
    Inventors: Howard Slater, David Hodgson
  • Patent number: 11228260
    Abstract: A method of controlling a switched reluctance motor is disclosed herein. The motor comprises a stator carrying a plurality of phase windings and a rotor. The method comprises activating the phase windings in a sequence selected to apply torque to the rotor, wherein during a cycle of rotation of the rotor the phase windings switch between an active state in which current in the phase winding applies torque to the rotor and an inactive state; applying a voltage to a selected phase winding whilst the selected phase winding is in the inactive state to provide a flux in the selected phase winding; determining the current in the selected phase winding; determining the rotor angle based on the current and the flux; and controlling said activating based on the rotor angle.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: January 18, 2022
    Assignee: Turntide Technologies, Inc.
    Inventors: Howard Slater, David Hodgson
  • Patent number: 11059372
    Abstract: An electric motor controller adapted to provide anti-lock braking of an electric traction motor for an electric vehicle is disclosed herein. The electric motor controller comprises a torque demand input for receiving a torque demand input signal based on a request from an operator of the electric vehicle and a torque demand adjuster adapted to adjust the torque demand input signal and to provide an adjusted torque demand signal. The torque demand adjuster is configured to adjust the torque demand signal such that the motor is controlled to reduce the difference between a motor speed and an estimated speed of the electric vehicle.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 13, 2021
    Assignee: Sevcon Limited
    Inventors: David Hodgson, Howard Slater
  • Patent number: 10938178
    Abstract: A vertical-cavity surface-emitting laser (“VCSEL”) has at least a substrate, electrical contacts, a first mirror region, a second mirror region and an active region between the mirror regions; where the mirror regions comprise distributed Bragg reflectors formed of a plurality of layers; laser emission is from at least one gallium arsenide antimonide nanostructure in the active region; and each said nanostructure contains more antimony atoms than arsenic atoms.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: March 2, 2021
    Assignee: Lancaster University Business Enterprises Limited
    Inventors: Manus Hayne, Peter David Hodgson
  • Patent number: 10333437
    Abstract: An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus including a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 25, 2019
    Assignee: Sevcon Limited
    Inventors: Peter Barrass, David Hodgson, Howard Slater
  • Publication number: 20180086208
    Abstract: An electric motor controller adapted to provide anti-lock braking of an electric traction motor for an electric vehicle is disclosed herein. The electric motor controller comprises a torque demand input for receiving a torque demand input signal based on a request from an operator of the electric vehicle and a torque demand adjuster adapted to adjust the torque demand input signal and to provide an adjusted torque demand signal. The torque demand adjuster is configured to adjust the torque demand signal such that the motor is controlled to reduce the difference between a motor speed and an estimated speed of the electric vehicle.
    Type: Application
    Filed: May 20, 2016
    Publication date: March 29, 2018
    Applicant: Sevcon Limited
    Inventors: David Hodgson, Howard Slater
  • Publication number: 20180054041
    Abstract: A vertical-cavity surface-emitting laser (“VCSEL”) has at least a substrate, electrical contacts, a first mirror region, a second mirror region and an active region between the mirror regions; where the mirror regions comprise distributed Bragg reflectors formed of a plurality of layers; laser emission is from at least one gallium arsenide antimonide nanostructure in the active region; and each said nanostructure contains more antimony atoms than arsenic atoms.
    Type: Application
    Filed: March 2, 2016
    Publication date: February 22, 2018
    Inventors: Manus Hayne, Peter David Hodgson
  • Publication number: 20180006587
    Abstract: An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus including a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data.
    Type: Application
    Filed: September 12, 2017
    Publication date: January 4, 2018
    Applicant: Sevcon Limited
    Inventors: Peter Barrass, David Hodgson, Howard Slater
  • Patent number: 9793834
    Abstract: An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus comprises a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: October 17, 2017
    Assignee: Sevcon Limited
    Inventors: Peter Barrass, David Hodgson, Howard Slater
  • Publication number: 20170205778
    Abstract: An electric motor controller having a front face and a rear face, the front face carrying a plurality of AC output couplings and the controller carrying a converter configured to convert a received DC supply into an output AC supply for controlling an electric motor, the AC output couplings being disposed symmetrically about an axis of symmetry of the controller on the front face of the controller. Also described is an apparatus comprising: a DC series motor; and a first current supply configured to supply a first current to an armature of the DC series motor; a second current supply configured to supply a second current to a field winding of the DC series motor; and a controller configured to control the first current supply to supply the first current based on a required torque output for the motor, and to control the second current supply to supply the second current based on the first current.
    Type: Application
    Filed: April 4, 2017
    Publication date: July 20, 2017
    Applicant: Sevcon Limited
    Inventors: Peter Barrass, Gary Squire, Robert Taylor, Howard Slater, David Hodgson, Philip Eagleton
  • Patent number: 9654032
    Abstract: An electric motor controller having a front face and a rear face, the front face carrying a plurality of AC output couplings and the controller carrying a converter configured to convert a received DC supply into an output AC supply for controlling an electric motor, the AC output couplings being disposed symmetrically about an axis of symmetry of the controller on the front face of the controller. Also described is an apparatus comprising: a DC series motor; and a first current supply configured to supply a first current to an armature of the DC series motor; a second current supply configured to supply a second current to a field winding of the DC series motor; and a controller configured to control the first current supply to supply the first current based on a required torque output for the motor, and to control the second current supply to supply the second current based on the first current.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: May 16, 2017
    Assignee: Sevcon Limited
    Inventors: Peter Barrass, Gary Squire, Robert Taylor, Howard Slater, David Hodgson, Philip Eagleton
  • Publication number: 20160325658
    Abstract: An ISOFIX trim retainer for retaining an opening in a trim cover of a seat along an anchor bar adapted to be releasably connected to a clip connector. The trim retainer has a generally flat, planar body portion for encircling the opening in the trim cover. The body portion includes a base portion extending between opposing side portions, a pair of retention tabs projecting inwardly towards facing distal ends and spaced generally parallel to the base portion, and an elongated slot defined between the retention tabs and the base portion adapted for receiving at least a portion of the clip connector therethrough.
    Type: Application
    Filed: May 9, 2016
    Publication date: November 10, 2016
    Inventor: David Hodgson
  • Publication number: 20160059095
    Abstract: The present disclosure provides a process for producing a multi-color golf club shaft and the resultant multi-color golf club. The process includes providing a golf club shaft and first applying a first color powder coating material onto at least a portion of the shaft to form a first powder coated shaft. The process includes melt-adhering the first color powder coating material to at least a portion of the shaft to form a first color coated shaft. The process includes second applying a second color powder coating material onto at least a portion of the shaft. The process includes curing the shaft and forming a multi-color powder coating adhered to at least a portion of the shaft.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 3, 2016
    Inventor: David Hodgson
  • Publication number: 20140055077
    Abstract: An electric motor controller having a front face and a rear face, the front face carrying a plurality of AC output couplings and the controller carrying a converter configured to convert a received DC supply into an output AC supply for controlling an electric motor, the AC output couplings being disposed symmetrically about an axis of symmetry of the controller on the front face of the controller. Also described is an apparatus comprising: a DC series motor; and a first current supply configured to supply a first current to an armature of the DC series motor; a second current supply configured to supply a second current to a field winding of the DC series motor; and a controller configured to control the first current supply to supply the first current based on a required torque output for the motor, and to control the second current supply to supply the second current based on the first current.
    Type: Application
    Filed: April 30, 2012
    Publication date: February 27, 2014
    Applicant: SEVCON LIMITED
    Inventors: Peter Barrass, Gary Squire, Robert Taylor, Howard Slater, David Hodgson, Philip Eagleton
  • Publication number: 20110274968
    Abstract: The present invention provides composite electrodes that comprise a titanium metal filler and a polymeric material. Advantageously the composite electrodes of the present invention do not suffer from the problems of carbon degradation, are thermally stable, are easily shaped, which demonstrate high power densities and which are relatively inexpensive to produce.
    Type: Application
    Filed: December 23, 2009
    Publication date: November 10, 2011
    Applicant: ITI SCOTLAND LIMITED
    Inventors: Stephen Harrison, Chulheung Bae, David Hodgson
  • Publication number: 20080038701
    Abstract: A method is disclosed for providing an immersive training environment for a user. A relaxation vignette is used and configured to facilitate learning by the user. A training vignette is provided and configured for emotionally and physically stimulating the user, the stimulation enhancing retention by the user. A system is disclosed that includes a relaxation vignette to prepare a user for learning. A training vignette emotionally and physically stimulates the user to enhance retention by the user. Both the relaxation vignette and the training vignette include a training system control module, an audio distribution module and a video distribution module.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 14, 2008
    Inventors: Charles Booth, David Hodgson
  • Publication number: 20050095587
    Abstract: The present invention provides purified disease detection and treatment molecule polynucleotides (mddt). Also encompassed are the polypeptides (MDDT) encoded by mddt. The invention also provides for the use of mddt, or complements, oligonucleotides, or fragments thereof in diagnostic assays. The invention further provides for vectors and host cells containing mddt for the expression of MDDT. The invention additionally provides for the use of isolated and purified MDDT to induce anitbodies and to screen libraries of compounds and the use of anti-MDDT antibodies in diagnostic assays. Also provided are microarrays containing mddt and methods of use.
    Type: Application
    Filed: February 21, 2001
    Publication date: May 5, 2005
    Inventors: Scott Panzer, Peter Shapiro, Steven Banville, Purvi Shah, Michael Chalup, Simon Chang, Alice Chen, Steven D'sa, Stefan Amshey, Christopher Dahl, Tam Dam, Susan Daniels, Gerard Dufour, Vincent Flores, Willy Fong, Lila Greenawalt, Jennifer Jackson, Anissa Jones, Tommy Liu, Ann Roseberry Lincoln, Bruce Rosen, Frank Russo, Theresa Stockdreher, Abel Daffo, Rachel Wright, Pierre Yap, Jimmy Yu, Diana Bradley, Shawn Bratcher, Wensheng Chen, Howard Cohen, David Hodgson, Stephen Lincoln, Stuart Jackson
  • Publication number: 20050020999
    Abstract: Disclosed is a vapor wand for administering inhalation anesthesia to wild animals. The wand has a fibrous wick that absorbs liquid anesthetic inserted by a syringe through a distal end cap and/or a leur fitting. Holes are spaced around the distal end of the wand so that movement of the air pump handle causes vaporized anesthetic to be dispensed through the holes.
    Type: Application
    Filed: July 26, 2004
    Publication date: January 27, 2005
    Inventor: David Hodgson
  • Patent number: 6640800
    Abstract: A the cooking apparatus for cooking food. The the cooking apparatus includes a body member comprising a perimeter wall. The perimeter wall defines an interior space of the body member. The interior space of the body member comprises an open end for permitting at least one heat source to be inserted into the interior space of the body member. A grill member is selectively coupled to the body member whereby the grill member is positioned over the interior space of the body member for supporting food to be cooked by the heat source positioned in the interior space. An oven assembly is selectively coupled to the body member. The oven assembly is positioned over the interior space of the body member for receiving food to be baked by the heat source positioned in the interior space of the body member.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: November 4, 2003
    Inventors: David A. Hodgson, Ginny Hodgson
  • Patent number: D807753
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: January 16, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Ghadah Alamer, Nancy Cabell, David Hodgson, Jordan Scott