Electric protective device and method for manufacturing same
US4771259A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Jul 28, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H85/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A connecting apparatus for connecting one end of a spring of a time-delay fuse to a hollow body of the fuse and a method for its manufacture is disclosed. The apparatus includes two transverse slots formed in the end of the body. An insert is placed in the slots. A central portion of the insert is disposed in the interior of the hollow body. An opening, such as one or more slots, is provided in the central portion of the insert for attaching one end of a spring to the insert and the body of the fuse. The other end of the spring is adapted to connect to a fusible element of the time-delay fuse. The method of manufacture of the apparatus includes forming transverse slots in the end of a hollow tube, placing the insert in the slots, and attaching one end of the spring to an opening in the insert. An alternative method of manufacture includes molding the hollow tube with an integral transverse member across the end of the tube, the transverse member having an opening in it. The spring of the time-delay fuse is then connected to the opening of the transverse member as a step in fabricating the fuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.