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:
Sep. 12, 2006
Filed:
Jun. 14, 2004
Peter Ravenscroft Wilkins, Droitwich, GB;
Neil Swann, Bromsgrove, GB;
Frederick James Davis, Droitwich, GB;
Isobel Pearce, Stourbridge, GB;
Peter Ravenscroft Wilkins, Droitwich, GB;
Neil Swann, Bromsgrove, GB;
Frederick James Davis, Droitwich, GB;
Isobel Pearce, Stourbridge, GB;
Ceramaspeed Limited, , GB;
Abstract
Apparatus and a method are provided for detecting an abnormal rise in temperature associated with a combination of a cooking utensil () and a cooking zone () of a cooking surface () overlying an electric heater (). The apparatus has a first temperature-responsive device () is provided within the heater and adapted to monitor temperature of the cooking surface (). A second temperature-responsive device () is provided within the heater and adapted to monitor temperature of the cooking utensil () through the cooking surface () to provide an electrical output as a function of temperature of the cooking utensil. Means () is provided for calculating first and second derivatives (DD) with time of the temperature sensed by the second temperature-responsive device () over an operating temperature range of the heater. Means () is provided to determine stabilization of the first derivative (D) within stabilizing threshold limit values. Means () is provided to thereafter compare the first and second derivatives (DD) with first and second predetermined threshold values and to detect an abnormal rise in temperature when the first and second predetermined threshold values are exceeded.