Molded case circuit breaker with an improved contoured cradle
US4642430A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1985 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Jul 18, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/525
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case circuit breaker includes a highly integrated operating mechanism having an over-center toggle mechanism for opening and closing a pair of separable electrical contacts. A pivotable, one-piece cradle coupled to the breaker handle includes a cradle latch surface for latching with a trip arm of a trip mechanism, a contact stop surface for limiting the movement of one of said electrical contacts and an arcuate cam surface for engaging a cradle cam pin during a reset operation. The arcuate cam surface of the cradle is contoured to enable the resetting of the operating mechanism after a trip operation by applying a relatively low, substantially constant reset force to the breaker handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.