Patents by Inventor David E. Gee

David E. Gee 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).

  • Brushless permanent magnet motor system
    Patent number: 4743815
    Abstract: A control system for a multi-phase brushless permanent magnet motor has circuitry for periodically generating signals representing the relative position of the rotor with respect to the stator, circuitry for decoding the periodically generated signals to determine the presence of the rotor at one of a plurality of predetermined rotary positions with respect to the stator, and circuitry for generating an interrupt signal in response to the presence of the rotor at one of the plurality of predetermined rotary positions with respect to the stator. Electrically controllable switches are connected to the phase windings to control the flow of current therethrough. A microprocessor is responsive to the interrupt signal for controlling in a closed loop manner the switches to commutate the phase windings of the motor a predetermined time after receipt of the interrupt signal.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: May 10, 1988
    Assignee: Emerson Electric Co.
    Inventors: David E. Gee, J. Stephen Thorn
  • Method and apparatus for transfer of liquefied gas
    Patent number: 3962882
    Abstract: A method and apparatus for transferring a liquefied gas from a first container into a second container without removal of vapor from the second container is disclosed.
    Type: Grant
    Filed: September 11, 1974
    Date of Patent: June 15, 1976
    Assignee: Shell Oil Company
    Inventors: David E. Gee, Robert V. Worboys