Patents by Inventor Franz Galliker

Franz Galliker 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).

  • Control circuit for reducing field voltage in D.C. motors
    Patent number: 4284933
    Abstract: A circuit arrangement is disclosed for reducing field voltage peaks in direct current motors which are energized by way of an electronic D.C. regulator, and which have an exciter winding connected with the armature and commutating pole windings by means of diodes. The circuit arrangement includes a choke coil connected in series with the exciter winding. In addition, a resistor is connected in parallel with the exciter winding. This arrangement prevents a rapid rise in the field current or the magnetic field flux of the motor.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: August 18, 1981
    Assignee: BBC Brown, Boveri & Co., Ltd.
    Inventors: Franz Galliker, Peter Knapp