Molded case circuit breaker with calibration adjusting means for a bimetal
US4630019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Sep 28, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case circuit breaker includes a new and improved calibration adjusting means for a bimetal in a trip mechanism. The trip mechanism also includes a bimetal having a portion movable in response to predetermined overload conditions, an intermediate control lever for adjusting the spatial disposition of the movable portion of the bimetal with respect to a trip bar of the trip mechanism and a rotatable adjustment means for adjusting the spatial disposition of the intermediate control lever in the circuit breaker. By rotating the adjustment means, the distance between the movable portion of the bimetal and the trip bar can be precisely adjusted via the intermediate control lever. The intermediate control lever is coupled to a relatively stationary portion of the bimetal thereby enabling such adjustment without applying undue stress to the movable portion of the bimetal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.