Patents by Inventor Michael Keith Steventon

Michael Keith Steventon 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).

  • Electric motors
    Patent number: 4096419
    Abstract: A motor arranged directly to drive a gramophone turntable which comprises a number of permanent magnet rotor pole pairs arranged on the circumference of a circle centered at the motor shaft, a number of air cored stator windings there being less stator windings than rotor pole pairs, and a commutator arrangement for controlling current through the windings whereby they react with the rotor poles to produce rotation of the turntable the current being controlled so that torque ripple is obviated.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: June 20, 1978
    Assignee: Plessey Handel Und Investments AG.
    Inventors: John Pelham Wren, Michael Keith Steventon