Patents by Inventor Ake Rydborn

Ake Rydborn 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 thread monitoring
    Patent number: 4628847
    Abstract: An apparatus for monitoring the underthread in sewing machines, in which at least one signal generator is mounted in the path of the underthread and is disposed to generate an electric signal when the underthread is urged by means of a looper against the signal generator, and the generated signal is coupled to a signal monitoring circuit electrically connected to the signal generator device and is operable to shutdown the machine in response to a loss of said signals from said signal generator device.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: December 16, 1986
    Inventor: Ake Rydborn