Device for controlling or limiting temperature in an electric cooking appliance
US5310993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1993 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Jan 5, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2213/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for controlling or limiting temperature in an electric cooking appliance includes a switch and a temperature sensor operatively coupled to the switch. The temperature sensor takes the form of a rod arranged substantially coaxially within a tube. The rod is made of a material having a first coefficient of thermal expansion and the tube is made of at least two tube portions, one of the tube portions being made from a material having a second coefficient of thermal expansion lower than the first coefficient of thermal expansion and another of the tube portions being made from a ceramic material having a third coefficient of thermal expansion intermediate the first and second coefficients of thermal expansion. The temperature controlling or limiting device may be incorporated into a radiant electric heater incorporating at least first and second heating elements defining separate heating areas for the cooking appliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.