Patents by Inventor Beat Wehrmuller

Beat Wehrmuller 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).

  • Circuit for driving and braking a speed-controlled direct current motor
    Patent number: 4179645
    Abstract: A circuit for driving and braking a variable speed D.C. motor. A braking resistance has a terminal connected to the field winding of the motor. A diode is connected between this terminal and a quenching diode of the braking circuit to reduce the limiting effects of voltages produced across a reversing condenser in the braking circuit.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: December 18, 1979
    Assignee: BBC Brown, Boveri & Company Limited
    Inventors: Beat Wehrmuller, Paul Wienenga