Means for manually slow-closing a circuit breaker that has a spring-actuated operating device
US4137436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1976 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Jul 21, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/064
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An operating device for an electric circuit breaker comprises a closing spring and a rotatable spring-controller mounted for rotation between first and second dead-center positions with respect to the spring. The spring is charged by transmitting rotational forces to the spring-controller through a main pawl mounted on the spring-controller and an abutment on a rotatable driving member. The main pawl is released from driven engagement with the abutment at the end of a spring-charging operation. Normal circuit-breaker closing is effected by allowing the spring to quickly discharge after a charging operation. A manual slow-close operation of the circuit breaker is effected through an auxiliary pawl mounted on the spring-controller in a position angularly-spaced from the main pawl. During normal spring-charging and discharging operations, this auxiliary pawl is prevented from engaging the abutment on the driving member. But when a manual slow-close operation is to be effected, engagement between the auxiliary pawl and the abutment is allowed. Rotation of the driving member during such engagement rotates the spring-controller through a slow-close operation. This slow-close operation is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.