Patents by Inventor Rudolf Zingg

Rudolf Zingg 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).

  • Method of adjusting a given pretension in threads on tensile strength testing apparatus and the like
    Patent number: 4338824
    Abstract: A method of adjusting a given pretension in threads on tensile strength testing apparatus. A force measuring device is used as an adjusting member for the pretension, from where the tensile load increases and the elongation thereby appearing is measured. The loose thread inserted into the thread clamp is either pretensioned by means of a movable testing clamp, or the thread is stretched by a transport device until the force measuring device indicates the given pretension value.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: July 13, 1982
    Assignee: Zellweger, Ltd.
    Inventors: Peter Brassel, Rudolf Zingg