| 摘要 |
A control lever is pivotally fastened to a support assembly and has an end portion movable along an arcuate pathway between a plurality of operating positions. A roller is rotatably fastened to the end portion of the lever and is movable therewith along the arcuate pathway. A detent member has a first end portion pivotally connected to the support assembly and has a normal position adjacent and lying along the arcuate pathway of the roller. A resilient device is connected to the detent member for resiliently biasing the detent member to the normal position. A device is provided for adjustably fastening a detent cam to the detent member at one of a plurality of positions in the arcuate pathway of the roller.
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