Patents by Inventor Ove Tjernstrom

Ove Tjernstrom 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).

  • Direct-cooled tape layer winding
    Patent number: 4001746
    Abstract: A direct-cooled layer winding for transformers is formed of a plurality of helically wound tapes, the tapes in successive layers being directed backwards and forwards in the axial direction so that the turns of successive layers form angles with each other. At least one cooling layer is arranged coaxial with the winding between two of the tape layers. The cooling layer is formed of a tubular cooling conductor which is helically wound into a complete layer with the inlet and outlet at the opposite ends of the winding.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: January 4, 1977
    Assignee: Allmanna Svenska Elektriska Aktiebolaget
    Inventors: Ove Tjernstrom, Uno Zetterlund