Patents Assigned to Watlow Electric Mfg. Co.
  • Method and apparatus for predicting heater failure
    Patent number: 6718283
    Abstract: A method is shown of predicting failure of resistive element heaters using a compiled database of measured ratiometric factors affecting heater life. The method can either be carried out actively, by continuously measuring known factors affecting heater life and decrementing a count of the remaining heater life, or the method may be carried out passively by estimating the operating profile and the averages within each segment of the profile, of the factors affecting heater life.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: April 6, 2004
    Assignee: Watlow Electric Mfg. Co.
    Inventors: Christopher C. Lanham, Rolando O. Juliano