Patents by Inventor James M. Thorne

James M. Thorne 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: 10097117
    Abstract: A control system is provided for an electric machine having a rotor and a stator. The control system has a converter circuit in electrical communication with the stator and a controller in electrical communication with the converter circuit. The controller is configured to receive a first signal indicating a torque applied to or output by the rotor and receive a second signal indicating a rotational speed of the rotor. The controller is also configured to determine at least one characteristic of a pulse signal based on at least one of the first or second signal. The controller is also configured to inject the pulse signal into one or more phases of the stator via the converter circuit according to the determined at least one characteristic. The controller is also configured to determine a position of the rotor based on the injected pulse signal.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 9, 2018
    Assignee: Caterpillar Inc.
    Inventors: Ahmed Khalil, Seok-Hee Han, Jackson Wai, Sangameshwar Sonth, Jesse Gerdes, James M. Thorne
  • Publication number: 20180175754
    Abstract: A control system is provided for an electric machine having a rotor and a stator. The control system has a converter circuit in electrical communication with the stator and a controller in electrical communication with the converter circuit. The controller is configured to receive a first signal indicating a torque applied to or output by the rotor and receive a second signal indicating a rotational speed of the rotor. The controller is also configured to determine at least one characteristic of a pulse signal based on at least one of the first or second signal. The controller is also configured to inject the pulse signal into one or more phases of the stator via the converter circuit according to the determined at least one characteristic. The controller is also configured to determine a position of the rotor based on the injected pulse signal.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 21, 2018
    Applicant: Caterpillar Inc.
    Inventors: Ahmed KHALIL, Seok-Hee HAN, Jackson WAI, Sangameshwar SONTH, Jesse GERDES, James M. THORNE
  • Patent number: 6122103
    Abstract: A broadband wire grid polarizer for the visible spectrum has a plurality of elongated elements supported on a substrate. A region having a lower refractive index than the refractive index of the substrate is disposed between the elements and the substrate to reduce the longest wavelength at which resonance occurs. The region may comprise a plurality of ribs extending from the substrate and supporting the elements. The ribs may be formed by etching slots into the substrate using the elements as a mask. The region may also comprise at least one layer of dielectric film. In addition the region may be comprise ribs extending from the surface, each having at least one layer of dielectric film disposed thereon.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: September 19, 2000
    Assignee: Moxtech
    Inventors: Raymond T. Perkins, Douglas P. Hansen, Eric W. Gardner, James M. Thorne, Arthur A. Robbins
  • Patent number: 5458084
    Abstract: X-ray wave diffraction devices are constructed using atomic layer epetaxy. A crystalline substrate is prepared with one or more surface areas on which multiple pairs of layers of material are to be deposited. These layers are then formed by atomic layer epetaxy on the surface areas of the substrate, one on top of another, with the material of each layer of each pair being selected to have a different index of refraction from that of the material of the other layer of each pair. The layers are formed so that the thickness of each layer of a pair is substantially the same as that of the corresponding layer of every other pair and so that x-ray waves impinging on the layers may be reflected therefrom. Layer pairs having a thickness of about 20 angstroms or less are formed on the substrate.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: October 17, 1995
    Assignee: Moxtek, Inc.
    Inventors: James M. Thorne, James K. Shurtleff, David D. Allred, Raymond T. Perkins
  • Patent number: 4989226
    Abstract: A method of treating a substrate having first and second sides with corresponding oppositely facing first and second surfaces, to produce curvature in the first surface. The method includes the steps of removing material, according to a predetermined pattern, from the second side of the substrate, and applying a stress-producing film of material to at least one surface of the substrate to thereby cause the substrate to bend to produce the desired curvature in the first surface.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: January 29, 1991
    Assignee: Brigham Young University
    Inventors: Richard C. Woodbury, Raymond R. Perkins, James M. Thorne, Larry V. Knight
  • Patent number: 4960486
    Abstract: A radiation detector window structure for use with a radiation detection system includes a frame, a plurality of upstanding spaced-apart ribs held in place by the frame, where the tops of the ribs terminate generally in common plane, and a thin film of material disposed on the tops of the ribs to span over the gaps therebetween for passing the radiation to be detected and for filtering at least some of the unwanted radiation. The tops of the ribs are smoothed and rounded to minimize a chance of piercing the film placed thereover. The ribs are spaced to provide sufficient support for the film so that the thickness of the film may be reduced to better transmit desired radiation.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: October 2, 1990
    Assignee: Brigham Young University
    Inventors: Raymond T. Perkins, James M. Thorne, Larry V. Knight, Richard C. Woodbury
  • Patent number: 4933557
    Abstract: A radiation detector window structure for use with a radiation detection system includes a frame, a plurality of upstanding spaced-apart ribs held in place by the frame, where the tops of the ribs terminate generally in common plane, and a thin film of material disposed on the tops of the ribs to span over the gaps therebetween for passing the radiation to be detected and for filtering at least some of the unwanted radiation. The tops of the ribs are smoothed and rounded to minimize a chance of piercing the film placed thereover. The ribs are spaced to provide sufficient support for the film so that the thickness of the film may be reduced to better transmit desired radiation.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: June 12, 1990
    Assignee: Brigham Young University
    Inventors: Raymond T. Perkins, James M. Thorne, Larry V. Knight, Richard C. Woodbury
  • Patent number: 4885055
    Abstract: A method of treating a substrate having first and second sides with corresponding oppositely facing first and second surfaces, to produce curvature in the first surface. The method includes the steps of removing material, according to a predetermined pattern, from the second side of the substrate, and applying a stress-producing film of material to at least one surface of the substrate to thereby cause the substrate to bend to produce the desired curvature in the first surface.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: December 5, 1989
    Assignee: Brigham Young University
    Inventors: Richard C. Woodbury, Raymond T. Perkins, James M. Thorne
  • Patent number: 4447303
    Abstract: A method of boron isotope enrichment involving the isotope preferential photolysis of (2-chloroethenyl)dichloroborane as the feed material. The photolysis can readily be achieved with CO.sub.2 laser radiation and using fluences significantly below those required to dissociate BCl.sub.3.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: May 8, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Reed J. Jensen, James M. Thorne, Coran L. Cluff, John K. Hayes