Patents by Inventor Hansrudi Sigrist

Hansrudi Sigrist 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).

  • Apparatus for and method of controlling tension of a filamentary material
    Patent number: 5421534
    Abstract: To regulate the wire tension, a wire tension regulator is disposed on a winding device for electrical coils. A return roller and a contact roller can be mounted on the regulator for prebraking of the winding wire. The winding wire is subsequently wrapped 360.degree. around a wheel brake. The wheel brake is driven in the forward and backward directions of the wire by a d.c. motor. A strain gauge is disposed between the brake wheel and the winding device. The d.c. motor generates a signal indicating a rotor position to a motor control unit which transmits the position as an amplified signal to a control device and, as a derived set value wire tension signal which also reaches the control device. In addition, a set value wire tension signal of a machine control unit or a set value wire tension signal of a wire tension preset is provided to the control device. The set value of the wire tension is compared with a signal representing the instantaneous wire tension.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: June 6, 1995
    Assignee: Meteor AG
    Inventors: Ernst Arnold, Hansrudi Sigrist