Patents by Inventor James J. Yearsin

James J. Yearsin 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).

  • Current monitoring circuit for static switch of uninterruptable power system
    Patent number: 4583004
    Abstract: A circuit for monitoring the load current supplied by an uninterruptable power supply for transferring the load to a secondary source when the load current exceeds the capability of the uninterruptable power system. A signal representing the load current is simultaneously, continuously compared to a first reference level and a second reference level. The second reference level has a greater effective magnitude than the first reference level and whenever it is exceeded by the instantaneous signal the transfer is initiated. The transfer is also initiated whenever the signal uninterruptably exceeds the first reference level for a selected period of time.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: April 15, 1986
    Assignee: Solidstate Controls, Inc.
    Inventor: James J. Yearsin