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:
Mar. 28, 2000
Filed:
Jun. 12, 1998
Ingar Fred Andersen, Bow, NH (US);
Paul R Cote, Bow, NH (US);
Thermal Technology, Inc., Concord, NH (US);
Abstract
The present invention is a temperature measurement device for furnace heating elements, a furnace utilizing the temperature measurement device and a method for measuring a temperature of the heating element utilizing the temperature measurement device. In its most basic form, the temperature measurement device of the present invention comprises a first electrical connector for carrying a first input signal from a heating element of a furnace, a second electrical connector for carrying a second input signal from a transformer of the furnace, a voltage measurement device in electrical connection with the first input signal and the second input signal, a current measurement device in electrical connection with the first input signal and the second input signal, a resistance measuring device in electrical communication with the voltage measurement device and the current measurement device for calculating the resistance of the heating element, and a temperature calculator in electrical communication with the resistance measuring device for comparing the resistance of the heating element with a plurality of predetermined resistance versus temperature relationships to determine a temperature of the heating element corresponding to the resistance of the heating element. The preferred temperature measurement device includes a summing device for determining a difference in a voltage between the first input signal and the second input signal and a dividing device for dividing a voltage through the heating element by a current through the heating element to determine the resistance of the heating element.