Composite fusible element for electric current-limiting fuses
US4315235A · kind A · utility
Inventor
Key dates
| Filing date | Jul 31, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Jul 31, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H85/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A composite fusible element of silver and copper includes an inlay of silver and a base formed by a thicker strip of copper than the inlay of silver. The strip of copper is severed by a pair of juxtaposed incisions, so that the entire current is carried at this particular point only by the strip of silver. Moreover, the incisions penetrate into the strip of silver, producing in it a point of reduced cross-section. The strip of copper is preferably provided with a concave groove. The strip of silver is preferably convex and fits into the concave groove of the strip of copper. The composite fusible element may include several parallel strips of silver in a joint base of copper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.