Patents by Inventor George F. Black

George F. Black 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).

  • Patent number: 4804923
    Abstract: A system for deriving a substantially constant output voltage from an alternating supply voltage of variable frequency and amplitude includes circuit responsive to negative-going zero crossing points of the supply for generating control signals whose duration depends on the number of points occurring in a predetermined time. A switching arrangement is responsive to the signals to interrupt the supply voltage, the interrupted voltage being applied through a transformer to an output circuit from which a d.c. output voltage is applied to spark igniters.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: February 14, 1989
    Assignee: Lucas Industries
    Inventor: George F. Black