Patents by Inventor Per G. Wareberg

Per G. Wareberg 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).

  • Calculator keyboard switch with disc spring contact and printed circuit board
    Patent number: RE29440
    Abstract: A keyboard switch assembly including a printed circuit board having four switch terminals on one side of the board, three of the terminals being arranged in a triangle and the fourth disposed within the triangle. Conductors on the one side of the board are respectively joined to the interior terminal and at least one of the three terminals. A conductive, generally triangular, snap-acting dome switch member is provided having arcuate apices, projections being respectively formed from the apices and respectively engaging the three terminals thereby spacing the periphery of the switch element from the one surface of the printed circuit board and the conductors thereon, at least the conductor connected to the interior terminal extending under the dome.
    Type: Grant
    Filed: March 9, 1976
    Date of Patent: October 11, 1977
    Assignee: Bowmar Instrument Corporation
    Inventors: Gilbert H. Durkee, Per G. Wareberg, Alan C. Yoder
  • Calculator keyboard switch with disc spring contact and printed circuit board
    Patent number: RE30923
    Abstract: A keyboard switch assembly including a printed circuit board having four switch terminals on one side of the board, three of the terminals being arranged in a triangle and the fourth disposed within the triangle. Conductors on the one side of the board are respectively joined to the interior terminal and at least one of the three terminals. A conductive, generally triangular, snap-acting dome switch member is provided having arcuate apices, projections being respectively formed from the apices and respectively engaging the three terminals thereby spacing the periphery of the switch element from the one surface of the printed circuit board and the conductors thereon, at least the conductor connected to the interior terminal extending under the dome.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: May 4, 1982
    Assignee: Bowmar Instrument Corporation
    Inventors: Gilbert H. Durkee, Per G. Wareberg, Alan C. Yoder