Patents by Inventor Helmer Heinz Holl

Helmer Heinz Holl 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).

  • Zigzag control device for sewing machines
    Patent number: 4052947
    Abstract: A control device for a zigzag sewing machine is disclosed in which the width of zigzagging and the neutral position of needle vibration may be separately influenced and in which for any given maximum width of zigzag stitching the extreme left and right hand neutral positions of needle vibration can always be made to coincide with the left and right hand sides of that maximum width of zigzag stitching.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: October 11, 1977
    Assignee: The Singer Company
    Inventors: Reinhold Papajewski, Helmer Heinz Holl
  • Thread wiper and tension release mechanism for securing machines
    Patent number: 3960098
    Abstract: A mechanism is disclosed in which the main driving mechanism of a sewing machine is harnessed simultaneously to actuate a thread wiper and a tension release mechanism for the sewing machine. Operation of the mechanism may be initiated by a solenoid which may be advantageously small in size and power since the solenoid does not supply any of the driving force incident to the operation of the thread wiper or tension release mechanisms.
    Type: Grant
    Filed: December 18, 1974
    Date of Patent: June 1, 1976
    Assignee: The Singer Company
    Inventors: Reinhold Papajewski, Helmer Heinz Holl