Fuse with improved spring timer
US4992770A · kind A · utility
31Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Sep 11, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H85/055
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The dual element time delay fuse includes a circuit overload trigger which opens the fuse in response to long term medium circuit overloads, and a short circuit strip disposed in a solid matrix filler for opening the fuse in response to the presence of a short circuit in the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.