Patents by Inventor John W. Walkinshaw

John W. Walkinshaw 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).

  • METHODS AND APPARATUS FOR THE USE OF ULTRASONIC ENERGY TO IMPROVE ENZYMATIC ACTIVITY DURING CONTINUOUS PROCESSING
    Publication number: 20090305356
    Abstract: Described herein are methods and devices for increasing enzymatic activity during continuous processing by applying ultrasonic energy.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 10, 2009
    Inventors: Susan E. Poniatowski, John W. Walkinshaw
  • Variable inductor
    Patent number: 7242275
    Abstract: A variable inductor which avoids electrical breakdown of the insulation in the control windings when used in high power applications includes a core formed of a permeable magnetic material, the core having three legs, including a center leg and two outer legs. A main winding element comprising a main conductor is wound around the center leg of the core. A control winding element comprising a control conductor is wound in a figure-eight configuration having a first winding and a second winding around respective outer legs, the winding configuration canceling induced voltages in the first and second windings, wherein a current through the control winding element causes a change in inductance of the main winding element.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: July 10, 2007
    Assignee: Paper Quality Management Associates
    Inventors: John E. Poniatowski, John W. Walkinshaw
  • Variable inductor
    Publication number: 20040239463
    Abstract: A variable inductor which avoids electrical breakdown of the insulation in the control windings when used in high power applications includes a core formed of a permeable magnetic material, the core having three legs, including a center leg and two outer legs. A main winding element comprising a main conductor is wound around the center leg of the core. A control winding element comprising a control conductor is wound in a figure-eight configuration having a first winding and a second winding around respective outer legs, the winding configuration canceling induced voltages in the first and second windings, wherein a current through the control winding element causes a change in inductance of the main winding element.
    Type: Application
    Filed: February 4, 2004
    Publication date: December 2, 2004
    Inventors: John E. Poniatowski, John W. Walkinshaw