Patents by Inventor Ronald E. Hamm

Ronald E. Hamm 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).

  • D.C. motor snubbing
    Patent number: 4189668
    Abstract: The invention provides snubbing apparatus for a D.C. motor in which a capacitor which is charged while the motor is rotating in a first direction is discharged into the gate of a thyristor to initiate the snubbing action. When the thyristor goes on a field coil is connected in series with the motor armature, so as to place the motor in a regenerative mode and snub the motor.
    Type: Grant
    Filed: January 19, 1978
    Date of Patent: February 19, 1980
    Assignee: Westinghouse-Bellambie (Proprietary) Limited
    Inventors: Derrick H. Willcock, Stanley Marcus, Ronald E. Hamm, David N. Bowden