Circuit breaker improvement to prevent setting of trip assembly
US4616199A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1984 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Dec 21, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/121
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improvement to prevent alteration of the circuit breaker calibration due to high overloads. A circuit breaker has a U-shaped current path with a brazed junction at the bend of the "U". Upon the occurrence of a large overload, the opposing current in the two legs of the U-shaped path will force the two legs of the "U" apart, possibly weakening the brazed junction. When one of the legs is a closely calibrated component of a trip assembly, the breaker will no longer operate within the proper range. A stop is placed within the housing to prevent the two legs from moving apart such a distance as will cause the brazed junction to fail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.