Vacuum circuit breaker with improved means for limiting overtravel of movable contact at end of opening stroke
US4064383A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Apr 26, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/6667
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum-type circuit breaker comprises a conventional wipe mechanism interposed between an operating member and the movable contact of the breaker. The wipe mechanism comprises a driven part coupled to the movable contact, a driving part coupled to the operating member but movable with respect thereto, and preloaded spring means between said driving and driven parts. First stop means is provided for stopping said operating member at the end of its circuit-breaker opening stroke with such abruptness that said driven member, against the opposition of said spring means, overruns the driving member following such stopping. Such overrunning of the driven member is limited by second stop means comprising a stop carried by said operating member. This stop engages the driven member and thus blocks said overrunning after a limited amount of such overrunning sufficiently low to prevent damage to the usual bellows of the vacuum circuit breaker despite thousands of excursions of the driven member through said overrunning travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.