Patents by Inventor Alexander Fraser Kerr

Alexander Fraser Kerr 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).

  • Patent number: 4027609
    Abstract: This disclosure relates to feed mechanisms for sewing machines, particularly industrial sewing machines. A reciprocatory advance motion is imparted to a feed dog means by an eccentric means connected to a driven shaft in the machine and to a feed advance shaft which imparts an oscillating motion to the feed dog means. A feed dog lift means for imparting a lift motion to the feed dog includes an eccentric means also connected to the driven shaft. The mechanisms for imparting advance motion and lift motion to the feed dog are connected to a common fulcrum pin to provide a sturdy and stable mechanism capable of operating at high speeds with minimum noise and vibration.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: June 7, 1977
    Assignee: The Singer Company
    Inventor: Alexander Fraser Kerr