Molded case circuit breaker having movable contact finger releasably locked to an operating mechanism
US5517164A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1995 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Jun 19, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/226
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A subframe is coaxially pivotally mounted with a movable frame of the operating mechanism of a molded case circuit breaker and is locked to the frame by a bell crank pawl which is pivotally mounted on the subframe. A leaf spring assembly rigidly attached to the subframe overlies the movable contact finger to engage the same in the circuit ON condition of the circuit breaker to provide desired contact force. The bell crank pawl is released upon an incrementally small amount of initial movement of the movable contact arm in response to blow-open magnetic repulsion forces to release the movable contact finger for pivotal opening movement relative to the movable frame of the circuit breaker operating mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.