Patents by Inventor Kenneth J. Heindl

Kenneth J. Heindl 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).

  • State-of-charge indicator for voltage-regulated battery charger
    Patent number: 3970913
    Abstract: A signaling circuit is connected across the output terminals of a voltage-regulated battery charger that also has a.c. input terminals, an SCR connected between one input terminal and an output terminal, and a regulating circuit connected with the gate of the SCR and comprising a zener diode. The signaling circuit comprises a small lamp bulb connected in series with another zener diode, the latter having a zener voltage such as to pass current through the bulb only when voltage at the output terminals is at or above the value corresponding to a fully charged battery.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: July 20, 1976
    Assignee: Briggs & Stratton Corporation
    Inventor: Kenneth J. Heindl