The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2023
Filed:
Oct. 14, 2019
Watlow Electric Manufacturing Company, St. Louis, MO (US);
Jeremy Ohse, St. Louis, MO (US);
Jake Spooler, Hannibal, MO (US);
Philip S. Schmidt, Winona, MN (US);
Patrick Margavio, Columbia, MO (US);
Melissa Lanham, Frankford, MO (US);
Paul Valachovic, Fenton, MO (US);
Brittany Phillips, St. Louis, MO (US);
Mark Denis Everly, St. Charles, MO (US);
WATLOW ELECTRIC MANUFACTURING COMPANY, St. Louis, MO (US);
Abstract
A heater system is provided. The system includes a resistive element with a temperature coefficient of resistance (TCR) of at least about 1,000 ppm such that the resistive element functions as a heater and as a temperature sensor and the resistive element is a material having greater than about 95% nickel. The system also includes a heater control module including a two-wire controller with a power control module that is configured to periodically compare a measured resistance value of the resistive element against a reference temperature to adjust for resistance drift over time during operation such that a temperature drift of the resistive element is less than about 1% over a temperature range of about 500° C.-1,000° C.