| 摘要 |
An operating mechanism for a manually operated load break switch having an over center spring drive moved by an operating handle to open and close the switch. The operating mechanism includes a shaft rotatable by the operating handle, a follower rotatably mounted on the shaft, an elongated forked plate pivotally mounted intermediate its length to the follower at a location radially outwardly of the shaft, an operating lever for the switch pivotally mounted on the shaft and movable by engagement with the follower and a driver affixed to the shaft for rotation therewith and positioned to engage and rotate the follower and the forked plate. An over center spring drive is pivotally connected to the forked plate at a location radially outwardly of the pivotal mounting of the forked plate to the follower. This mechanism permits the over center spring drive to be moved between fully closed and fully opened conditions of the switch by rotation of the operating handle while preventing alignment of the shaft, the pivotal mounting of the forked plate to the follower and the over center spring drive pivotal mounting to the forked plate when the spring drive reaches its fully compressed condition. |
