Patents by Inventor Herbert Polster

Herbert Polster 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).

  • Device for controlling the rotational speed of the rolls of a rolling mill
    Patent number: 5619880
    Abstract: The rotational speed of the rolls of a rolling mill is controlled such that the loops of rolled material between two roll stands have a constant height. The last roll stand in the direction of rolling preferably acts as a guide roller stand, whose speed is controlled. The loop height is controlled by adjusting the rotational speed of the roll stand ahead of the loop.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: April 15, 1997
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Polster, Harald Bax
  • Apparatus for controlling controlled systems with dead time
    Patent number: 4052642
    Abstract: In controlled systems with dead time, particularly converter current controls, the reference value is fed directly to the final control element providing anticipatory control and, in addition is fed to the reference input of the controller through a dead time simulator. In accordance with a further feature, the difference between the input signal and the output signal of the dead time simulator can be added into the final control element as an additional control variable to compensate for inertia of the controlled system.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: October 4, 1977
    Assignee: Siemens Aktiengesellschaft
    Inventors: Winfried Speth, Walter Dreiseitl, Klaus Bohm, Lothar Schleicher, Herbert Polster