| 摘要 |
Circuit breaker cubicle shutters wherein a pair of shutters are slidable vertically with respect to a back plate and with respect to each other and behind the back plate. The back plate is provided with a plurality of upper openings registering with upper stationary connectors and a plurality of lower openings registering with lower stationary connectors. The shutters are interconnected by links pivotally mounted on the back plate and interconnecting the lower portion of the lower shutter with the lower portion of the upper shutter. An actuator comprises a bell crank lever one end of which is engaged by a pin or roller on a circuit breaker as it is moved into the cubicle to rotate the same. The other end of the actuator is connected to the lower shutter to pull the lower shutter from an upper closed position in which it is maintained by tension springs to a lower position in which an opening in the lower shutter registers with the lower set of openings in the plate. The shutters are interconnected by links sandwiched between them so that the upper shutter will be moved upwardly by downward movement of the lower shutter. The Z-shaped arrangement of the links ensures that the openings are not blocked when the shutters are moved to a position where openings in the said shutters register with openings in the plate.
|
