Patents by Inventor David Frazer Spencer

David Frazer Spencer 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).

  • System and method for storing energy
    Patent number: 7688036
    Abstract: A self-recharging battery comprising a generator and an energy storage device contained within the battery case. The generator comprises a magnetic structure configured to generate a compressed magnetic field and a coil configured to focus the compressed magnetic field in electrical conductive elements of the coil.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: March 30, 2010
    Assignee: Battelle Energy Alliance, LLC
    Inventors: Eric Jay Yarger, John Morrison, John Grant Richardson, David Frazer Spencer, Dale W. Christiansen
  • Methods, systems and devices for detecting and locating ferromagnetic objects
    Patent number: 7652572
    Abstract: Methods for detecting and locating ferromagnetic objects in a security screening system. One method includes a step of acquiring magnetic data that includes magnetic field gradients detected during a period of time. Another step includes representing the magnetic data as a function of the period of time. Another step includes converting the magnetic data to being represented as a function of frequency. Another method includes a step of sensing a magnetic field for a period of time. Another step includes detecting a gradient within the magnetic field during the period of time. Another step includes identifying a peak value of the gradient detected during the period of time. Another step includes identifying a portion of time within the period of time that represents when the peak value occurs. Another step includes configuring the portion of time over the period of time to represent a ratio.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: January 26, 2010
    Assignee: Battelle Energy Alliance, LLC
    Inventors: Lyle Gene Roybal, Dale Kent Kotter, David Thomas Rohrbaugh, David Frazer Spencer
  • METHODS, SYSTEMS AND DEVICES FOR DETECTING AND LOCATING FERROMAGNETIC OBJECTS
    Publication number: 20080084301
    Abstract: Methods for detecting and locating ferromagnetic objects in a security screening system. One method includes a step of acquiring magnetic data that includes magnetic field gradients detected during a period of time. Another step includes representing the magnetic data as a function of the period of time. Another step includes converting the magnetic data to being represented as a function of frequency. Another method includes a step of sensing a magnetic field for a period of time. Another step includes detecting a gradient within the magnetic field during the period of time. Another step includes identifying a peak value of the gradient detected during the period of time. Another step includes identifying a portion of time within the period of time that represents when the peak value occurs. Another step includes configuring the portion of time over the period of time to represent a ratio.
    Type: Application
    Filed: October 9, 2006
    Publication date: April 10, 2008
    Inventors: Lyle Gene Roybal, Dale Kent Kotter, David Thomas Rohrbaugh, David Frazer Spencer