| 摘要 |
A partitioned switching panel of the type including a power switch provided with first switch contacts and mounted on a carriage which is movable toward and away from cooperating stationary second switch contacts disposed behind a partition of the switching panel and accessible via openings in the partition, displaceable shutters mounted on the partition for closing the openings, and an opening mechanism for the shutters which is actuated by the carriage drive for opening the shutters before the incoming movement of the carriage from the circuit breaking position to the operating position begins. The carriage drive is provided with an output lever which is rotatably mounted on the carriage and which is provided with a cam follower which, upon eneragization of the carriage drive to move the carriage to the operating position, traverses a path section in a substantially linear camming track which is fixed in the switching panel, with this path section being ineffective to cause forward movement of the carriage. During such movement, the cam follower simultaneously effects opening of the shutters by engaging a camming lever rotatably mounted on the switching panel. Thereafter, the cam follower traverses the linear camming track twice in opposite directions to effect the forward movement of the carriage into the operating position of the switch.
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