Electrical heaters
US4822983A · kind A · utility
17Cited by
9References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1986 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Dec 5, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus for automatically disconnecting a conductive polymer heater if an arcing fault occurs. A sensor conductor is incorporated into the heater, so that if an arcing fault occurs, the current through the sensor conductor increases and triggers a safety circuit to disconnect the heater. The sensor conductor is preferably insulated by an organic polymer which pyrolyses if an arcing fault occurs and thus permits current to flow between the sensor conductor and an electrode of the heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.