Patents by Inventor Ewart T. Osborne

Ewart T. Osborne 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).

  • Alternator and controlled rectifier for producing pulse width modulated DC output pulses
    Patent number: 4749935
    Abstract: A regulated chopped DC power supply comprising an alternator with a stator and a rotor, the alternator having a three-phase winding for providing a high voltage output (1, 2, 3) and a star-connected three-phase winding for providing a low voltage output. Also included is a control circuit (14) for controlling a rectifier (12) which is connected to the high voltage output (1, 2, 3) of the alternator to produce a regulated chopped dc output (52) for powering electrical appliances. The control circuit (14) periodically interrupts the rectifier (12) at a frequency to interrupt substantially simultaneously all of the phases of the high voltage output.
    Type: Grant
    Filed: August 7, 1986
    Date of Patent: June 7, 1988
    Assignee: Unipower International Pty. Ltd.
    Inventor: Ewart T. Osborne