Patents by Inventor Evans H. Pridgen

Evans H. Pridgen 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).

  • Automatic solder paste application to circuit boards
    Patent number: 4796560
    Abstract: Solder paste is automatically applied to circuit boards, in predetermined amounts at predetermined positions by providing a plurality of holes in a nylon, "Delrin," "Teflon" or other plastic-metal plate, the holes being in a predetermined pattern, filling solder paste into the holes which are facing in an upward direction pivoting the plate over the circuit board, and ejecting the solder paste onto a circuit board. Conveniently the solder paste is ejected by pins mounted on a further plate and reciprocated in the holes. The position of the pins in the holes during filling determines the amount of solder paste filled into the holes.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: January 10, 1989
    Assignee: Northern Telecom Limited
    Inventors: Jean P. Berger, Evans H. Pridgen, Alfred W. Owens
  • Automatic solder paste application to circuit boards
    Patent number: 4704305
    Abstract: Solder paste is automatically applied to circuit boards, in predetermined amounts at predetermined positions by providing a plurality of holes in a nylon, "Delrin," "Teflon" or other plastic-metal plate, the holes being in a predetermined pattern, filling solder paste into the holes which are facing in an upward direction pivoting the plate over the circuit board, and ejecting the solder paste onto a circuit board. Conveniently the solder paste is ejected by pins mounted on a further plate and reciprocated in the holes. The position of the pins in the holes during filling determines the amount of solder paste filled into the holes.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: November 3, 1987
    Assignee: Northern Telecom Limited
    Inventors: Jean P. Berger, Evans H. Pridgen, Alfred W. Owens
  • Combined printed circuit board carrier and component tray
    Patent number: D276429
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: November 20, 1984
    Assignee: Northern Telecom Inc.
    Inventor: Evans H. Pridgen