Electrical device comprising a PTC or NTC composition
US4801784A · kind A · utility
25Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Feb 24, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A self-regulating PTC heater in which the direction of flow of current is reversible in a region of the PTC material in response to a change in the resistivity of the material whereby current in-rush is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.