Patents by Inventor Allan G. Swahn

Allan G. Swahn 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).

  • Testing interface for railroad signal relays
    Patent number: 6963202
    Abstract: A testing interface provides rapid, temporary connections to individual signal relays used in railroad signal systems when testing is required, and otherwise permits normal operation of railroad signal vital circuits through its connections. A connectivity block provides contacts that are used to isolate the relay from its application circuit and provide connectivity to the relay coils for testing when a connection paddle is inserted into the block. The interface allows fully automated or manual testing of installed relays without requiring removal from the relay rack.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: November 8, 2005
    Assignee: Ultra-Tech Enterprises, Inc.
    Inventors: Joseph C. Winkler, Paul J. Galburt, Allan G. Swahn
  • Testing interface for railroad signal relays
    Publication number: 20040024555
    Abstract: A testing interface provides rapid, temporary connections to individual signal relays used in railroad signal systems when testing is required, and otherwise permits normal operation of railroad signal vital circuits through its connections. A connectivity block provides contacts that are used to isolate the relay from its application circuit and provide connectivity to the relay coils for testing when a connection paddle is inserted into the block. The interface allows fully automated or manual testing of installed relays without requiring removal from the relay rack.
    Type: Application
    Filed: July 31, 2002
    Publication date: February 5, 2004
    Inventors: Joseph C. Winkler, Paul J. Galburt, Allan G. Swahn