Devices for detecting the rupture of an electrical circuit element
US4263589A · kind A · utility
19Cited by
9References
15Claims
0Family size
Inventors
Key dates
| Filing date | Jul 19, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Jul 19, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2059/009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The device comprises means for applying a DC voltage U as a function of the voltage taken from the terminals of a fuse between a fixed electrode and a movable electrode forming together a capacitor. The movable electrode is urged towards the fixed electrode by an electret fast to the latter and in the opposite direction by a magnet and by the voltage U. As soon as this voltage exceeds a threshold corresponding to the rupture of the fuse, the movable electrode swings over and closes a switch for warning purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.