Patents by Inventor Leonard E. Triggs

Leonard E. Triggs 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).

  • Safety device for subcritical pressure steam boilers
    Patent number: 4802446
    Abstract: A safety device for subcritical natural and forced circulation boilers wherein the differential between downcomer fluid temperature and drum saturation temperature is measured and the trend of the differential is determined by computer means on a continuous basis. If the differential approaches a defined limit in its trend in a defined time interval or the furnace tube temperature increases instantaneously, the heat source for the boiler is diminished.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: February 7, 1989
    Inventor: Leonard E. Triggs