Self-regulating heater employing reactive components
US4849611A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Novel electrical heater which are self-regulating as a result of appropriate combination of a constant current or constant voltage power source with a resistive heating component and a temperature-sensitive component. Preferred heaters comprise a plurality of heating units, each of which heating units comprises a reactive component, a resistive heating component, and a temperature-responsive component. Self-regulation of the heater may be achieved in a number of different ways, including the use of employing a reactive component and a temperature-responsive component which form a combination exhibiting an impedance which changes with temperature. The temperature-responsive component can for example change in dielectric constant, or in permeability or in shape, or can effect changes in the frequencies inputted to the reactive component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.