Circuit breaker
US5874877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Jul 29, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker with a completely electromagnetic type overcurrent tripping device has a flexibility for changes in the production schedule of the overcurrent tripping device. An overcurrent tripping device for each pole is integrally housed in a common unit case, which is then inserted into a case of the circuit breaker. In this case, a yoke of the overcurrent tripping device is combined with an oil dash pot inserted into a coil, and the combined parts are pressed and fixed in the unit case without soldering. Thus, the coil, which is changed depending on the rated current, and the yoke and oil dash pot which are common products, can be separately stored prior to assembly, thereby enabling flexible responses to changes in the production schedule. In addition, the yoke and the oil dash pot need not be soldered and are fixed individually to the unit case, thereby reducing the number of assembly operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.