Circuit breaker with interlock for welding contacts
US5165532A · kind A · utility
22Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | May 29, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S200/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker includes an interlock which prevents movement of the handle to the off position when the contacts are welded closed. The interlock includes a pair of floating links which jam between slots in arms of the yoke of a spring powered operating mechanism which carries the handle, and recesses in the rotatable cross-bar carrying the movable contact arms. The recesses are offset from the rotational axis of cross-bar so that an attempt to move the switch to the off position generates a moment which will break open lightly welded contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.