Circuit-protecting fuse having arc-extinguishing means
US4032879A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Nov 18, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H85/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit-protecting fuse comprises an insulating housing having electrically conductive connectors on opposite ends thereof to connect the fuse in an electrical circuit and at least one fusible link in the housing connected in electrically conductive relationship at opposite ends thereof with the connectors. The fusible link has at least one area of limited cross-section defining a heat-generating section and a member of a material which produces arc quenching gas when heated to a predetermined temperature positioned on the heat-generating section, whereby when an overload condition of predetermined magnitude occurs in a circuit in which the fuse is connected, the heat-generating section melts and vaporizes, and the heat thus produced generates an amount of deionizing gas from the member to extinguish any arc which forms at the vaporized section. Seal means seals the fuse to prevent escape therefrom of flames and ionized gas the the like produced as a result of the overload condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.