Patents by Inventor David A. Kunde

David A. Kunde 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).

  • Railway signaling relay
    Patent number: 4564829
    Abstract: A railway signaling relay for use in vital circuits has a high percentage release (ratio of drop away current to pickup current between 70% and 80%) by arrangement of contact springs and their associated pressure and stop plates which provide trapped pressure in the contact springs affording the high percentage release characteristic without modification of the electrical or basic mechanical configuration of the relay and retaining its vital characteristics.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: January 14, 1986
    Assignee: General Signal Corp.
    Inventors: Cornelius J. Illenberg, Ronald W. Dinger, David A. Kunde, Anthony V. Lucarelli