Patents by Inventor Henry J. Chafer

Henry J. Chafer 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).

  • Spark discharge ignition systems for gas turbine engines
    Patent number: 4261025
    Abstract: A spark ignition system utilizes a one transistor inverter including a transformer with a primary winding, controlled by the transistor and a feedback winding switching the transistor on and off. The core of the transformer saturates at a current less than that required to saturate the transistor. An inductor in series with the primary winding has an inductance greater than that of the primary winding when the latter is saturated but less than that of the primary winding when the latter is not saturated. The second winding is used to charge a capacitor which has a spark circuit across it.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: April 7, 1981
    Assignee: Lucas Industries Limited
    Inventors: Henry J. Chafer, Anthony J. Purkiss