Multi-pole excess current circuit breaker
US4079345A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1976 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Jun 9, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/1027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-pole excess current circuit breaker assembly has a plurality of single-pole circuit breakers. In each of the latter the electric contacts are openable by a spring-loaded tripping mechanism actuated by a release lever as the release lever is moved from a first position to a second position by an excess current responsive device. The actuated tripping mechanism moves the release lever from the second position to a third position. The release levers of all the single-pole circuit breakers are operatively interconnected by a one-piece coupling member which is fixedly attached to one of the release levers, but is coupled to the others with a clearance, so that when excess current flows through the contacts of one of the single-pole circuit breakers, the release lever of the latter will move the release levers of the other single-pole circuit breakers only when it is displaced from the second position to the third position by the tripping mechanism of that single-pole circuit breaker through which the excess current flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.