Electrical devices
US4801785A · kind A · utility
17Cited by
22References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1986 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jan 14, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Improvements to electrical devices comprising conductive polymer compositions are described. The device, preferably a heater, comprises two electrodes, preferably planar electrodes and a conductive polymer composition, which preferably exhibits PTC behavior, and which is preferably sandwiched between the electrodes. At least one of the electrodes comprises a metal with a thin layer of high resistivity material attached thereto, e.g. anodized aluminum, so that the layer separates the electrode and the conductive polymer composition. This raises the room temperature resistance of the device and thus reduces the in-rush current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.