Patents by Inventor Adrianus Henricus van Duynhoven

Adrianus Henricus van Duynhoven 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).

  • Warp tension controller
    Patent number: 4031923
    Abstract: A warp tension controller for a loom comprises a warp tension sensor for generating a first signal which is a measure of the warp tension, a source of a reference signal, and means for comparing said signals and producing an output signal representing deviation of said first signal from said reference signal. An operational amplifier has an inverting input connected to receive said output signal, and has an output connected to means for adjusting the warp tension. A feedback circuit connected between said input and said output of said amplifier comprises a resistor in parallel to an integrating capacitor.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: June 28, 1977
    Assignee: Ruti-Te Strake B.V.
    Inventor: Adrianus Henricus VAN Duynhoven
  • Device for manipulating yarns
    Patent number: 3963229
    Abstract: A device for manipulating yarns, comprises a part movable between an operative and an inoperative position, which cooperates with an electric coil according to the principle of "magnetic pressure".
    Type: Grant
    Filed: December 20, 1973
    Date of Patent: June 15, 1976
    Assignee: Ruti-Te Strake B.V.
    Inventor: Adrianus Henricus van Duynhoven