Patents by Inventor Thomas Bierwirth

Thomas Bierwirth 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).

  • Monitoring circuit for a supply voltage
    Patent number: 6188321
    Abstract: The invention relates to a monitoring circuit for at least one supply voltage (UB, UH), including a first threshold switch (20), which if the supply voltage (UB) drops below a predeterminable threshold value generates a first warning signal (USWN), and a second threshold switch (66), which after a fixed warning period tw elapses generates a second warning signal (TOTUSN). In order that the warning signals will be generated without bounce, it is provided that the threshold switches (20, 66) each have an internal counting circuit for determining time periods tv1, tv2, after which the first and second warning signals (USWN, TOTUSN) generated are reset.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: February 13, 2001
    Assignee: Schneider Automation GmbH
    Inventors: Rainer Horstkotte, Thomas Bierwirth