| 摘要 |
A circular knitting machine comprises a rotatable knitting needle cylinder which carries a plurality of knitting needles through knitting stations. A needle-moving jack is pivotally connected with each of the knitting needles and is movable in a needle-raising stroke and a needle-lowering stroke to effect needle raising and lowering, respectively, Each of the needle-moving jacks has a butt thereon which is received in a cam track which operates to effect the raising and lowering of the needle-moving jacks. A mechanism is provided for controlling the operation of each knitting needle as it progresses through the stations. The mechanism specifically effects pivoting of the needle-moving jack so that the butt thereon is removed from the cam track to thereby prevent raising and lowering of the needle. The means which effects the pivoting movement of each needle-moving jack comprises a selector jack which is linearly movable in a direction substantially transverse to the axis of rotation of the needle cylinder and interconnecting means which operatively connect the selector jack and the needle moving jack so that movement of the selector jack effects the pivoting movement of the needle-moving jack. Electromagnetic means are provided to control the movement of each selector jack so that a selector jack is moved to effect the pivoting movement of the needle-moving jack so as to prevent raising and lowering of the needle or not moved to allow the needle-moving jack with which it is associated to remain with its butt in the cam track and effect movement of the needle.
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