Patents by Inventor James John Bates

James John Bates 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).

  • Electrical commutators and slip-rings
    Patent number: 4019076
    Abstract: A commutator or slip-ring has a contact face formed of at least two dissimilar electrically conductive materials which have different values of electrical resistance. The two materials each occupy different discrete areas with a brush bearing on both areas simultaneously.According to a further feature a commutator comprises pairs of segments of alternately high resistance and low resistance mounted in a machine which is arranged to rotate so that brushes bear firstly on a low resistance segment and then on a high resistance segment.
    Type: Grant
    Filed: January 8, 1975
    Date of Patent: April 19, 1977
    Assignee: National Research Development Corporation
    Inventor: James John Bates