Electric fuse having helically wound fusible element and process for manufacturing the fuse
US4001748A · kind A · utility
8Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Jul 10, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H85/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fuse for elevated circuit voltages having a fusible element that is substantially in the shape of a helix and is, in essence, supported only by the pulverulent arc-quenching filler of the fuse, i.e. which is supported without resort to a mandrel of electric insulating material around which the fusible element is wound. The casing of the fuse is sealed to preclude the escape of hot arc products by circular disks of asbestos fibers and by ferrules mounted on the ends of the casing. Plug terminals performing that sealing function are dispensed with. The steps involved in assembling the fuse are described in detail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.