Hot warning device for cooking apparatus
US4544831A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1984 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Jul 6, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H37/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a cooking and heating apparatus, a device for warning personnel of dangerously hot temperature is incorporated within the structure of a thermostat which has a switch for regulating the flow of electric current to a heating element of the apparatus. The thermostat includes a push rod mechanically coupled to a finger-like termination which extends through an aperture in an arm of the regulating switch to engage the arm of a further switch used in activating a warning indication. A collar on the termination engages the arm of the regulating switch subsequent to the activation of the further switch by the rod. The rod expands with increasing temperature and, thereby, initiates the warning at a lower temperature than the temperature of the power cut off by the regulating switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.