| 摘要 |
In a goggle type valve having a valve plate movable transversely of the passage through the valve between a fully open and a fully closed position with the valve body having a fixed end section at each end and an intermediate section axially movable into and out of valve plate-clamping position, there is provided a limit switch arrangement to assure proper sequencing of the axial travel of the movable member and the operation of the valve plate from one position to the other, including means for effectively amplifying the slight axial movement of the intermediate section to the desired extent for operation of the limit switches.
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