Wiring terminal construction
US4913666A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R4/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The housing for an electrical device or control has a plurality of electric terminals, each having a base into which a screw is threaded with the screw head overlying the base to clamp a wire therebetween. Each base is recessed into the housing in a cavity having one side closed by a tab bent up from the base. The housing cavity and tab prevent lateral access to the space between the screw head and base except where permitted by a hole in the tab. The hole has an inverted teardrop shape and has its longitudinal axis tilted about 20.degree. so the larger end of the hole is further from the screw. The hole is positioned to the left of the screw (when viewed from outside the tab). As the screw is tightened the wire is forced down the tilted axis of the hole closer to the screw while friction between the screw head and the wire urges the wire further into the cavity. The base is provided with raised bumps or a recess. When the screw is tightened the wire is deformed against the bumps or into the recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.