Patents by Inventor Edward M. Ratherham

Edward M. Ratherham 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).

  • Patent number: 5293774
    Abstract: Sensors are provided for monitoring the speeds of a turbine and a compressor interconnected by a shaft. Signals from the sensors are used to control the direction of counting of a counter. If the shaft is intact, the counter repeatedly counts up from and returns to zero. If the shaft breaks, the counter counts upwardly and a signal is given when the count in the counter exceeds a threshold value.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: March 15, 1994
    Assignee: Lucas Industries Public Limited Company
    Inventor: Edward M. Ratherham