Patents by Inventor Alan C. Yoder

Alan C. Yoder 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: 4045636
    Abstract: A printed wiring board for a keyboard switch assembly for electronic apparatus, such as electronic calculators, comprising a self-supporting insulative board having a plurality of elongated connectors on one surface thereof, at least some of the conductors having terminal portions for cooperating with switch elements. A layer of insulating material covers the one surface of the board and the conductors excluding the terminal portions. Each of the terminal portions has a coating of conductive ink thereon and a jumper element also formed of conductive ink is coated on the insulating layer crossing at least one of the conductors embedded therein and joining at least two of the terminal portion coatings. The conductive ink is preferably a noble-metal filled resin compound, such as silver epoxy, screen printed onto the insulating layer and terminal portions.
    Type: Grant
    Filed: January 28, 1976
    Date of Patent: August 30, 1977
    Assignee: Bowmar Instrument Corporation
    Inventors: Alan C. Yoder, John E. Weber
  • Patent number: 3941964
    Abstract: A push-button type switch device for use in generating binary coded signals. An insulative board is provided having flat opposite surfaces. An overcenter, snap-acting diaphragm switch element is provided movable between a first inactive position and a second overcenter operative position in response to application of a predetermined operating force thereon, as by depression of a push button. The diaphragm element has a centrally disposed common contact area and a plurality of radially spaced leg members extending outwardly therefrom. The leg members have outer ends which respectively engage first terminal pads on one surface of the board thereby normally supporting the diaphragm element thereon in its first position. A common terminal is provided on the one side of the board and has an external conductor connected thereto, the common terminal being in registry with the common contact area of the diaphragm element and spaced therefrom in the first position.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: March 2, 1976
    Assignee: Bowmar Instrument Corporation
    Inventor: Alan C. Yoder
  • 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
  • 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