Circular knitting machine with jacquard pattern control mechanism

In a circular knitting machine having knitting instrumentalities for forming knit fabric including a rotating member having a plurality of grooves in which said knitting instrumentalities are slidably mounted, the improvement comprising control means for controlling said knitting instrumentalities to produce jacquard knit fabric, said control means comprising

• a plurality of rocker bar supporting members each slidably mounted in one of the grooves along with one of said knitting instrumentalities, each of said plurality of rocker bar supporting members including at least one butt protruding therefrom,
• a plurality of elongate rocker bars formed free of butts and having magnetically attractable opposite end portions and each being pivotally mounted on one of said plurality of rocker bar supporting members for movement about a medial pivot, the opposite end portions of said elongate rocker bar being selectively movable between operative and inoperative positions,
• magnetic attracting means operatively associated with the opposite end portions of said elongate rocker bars for selectively attracting one of said magnetically attractable opposite end portions to pivot said elongate rocker bars and selectively move one of the opposite end portions to said operative position and the other of the opposite end portions to said inoperative position,
• rocker bar operating cam means engageable with the end portion of said rocker bar in said operative position for either moving the rocker bar and the rocker bar supporting member assembly from a retracted position to an extended position for engagement and movement said knitting instrumentality or maintaining the rocker bar and the rocker bar supporting member assembly in said retracted position, and
• control cam means engageable with said knitting instrumentalities for controlling said knitting instrumentalities and for moving the instrumentalities to at least one knitting position upon movement of the rocker bar supporting member to the extended position and for maintaining said knitting instrumentality in a non-knitting position when the rocker bar supporting member is in the retracted position.