Patents by Inventor David C. Jencks

David C. Jencks 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).

  • Solenoid energization indicator
    Patent number: 5287087
    Abstract: An energization indicator for a solenoid includes an electrically operable signaler (70) having a coil (72) for energizing the signaler (70) when a magnetic flux field sweeps such coil, with the coil (72) being mounted in the magnetic flux path of the solenoid coil (53).
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: February 15, 1994
    Assignee: Detroit Coil Company
    Inventors: David C. Jencks, Larry A. Williamson
  • Solenoid
    Patent number: 4166262
    Abstract: An alternating current solenoid having a quadrilateral frame and coil wound plastic bobbin disposed therein is encapsulated in a resin block with a pole piece extending into the block and through the frame at one end, and a plunger in a guideway formed by the barrel of the bobbin reciprocates through the other end of the frame and within the guideway.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: August 28, 1979
    Assignee: Detroit Coil Company
    Inventors: Hollis W. Jencks, David C. Jencks
  • Encapsulated solenoid
    Patent number: 4087773
    Abstract: An alternating current solenoid having a quadriateral frame and a coil-wound plastic bobbin disposed therein is encapsulated in a resin block opening outwardly at one end with a pole piece extending into the block through such end and through the frame and into a plunger guideway formed by the barrel of the bobbin, the opposite end of the block interiorally defining an extension of the guideway and closing the end thereof remote from the pole piece.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: May 2, 1978
    Assignee: Detroit Coil Company
    Inventors: Hollis W. Jencks, David C. Jencks, Ralph M. Burton
  • Folded frame for an electric solenoid
    Patent number: D283506
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: April 22, 1986
    Inventor: David C. Jencks