Multiple pattern wheel

In a circular knitting machine the combination comprising a cam section block, needle actuating cams on the section block, a slotted pattern wheel, a plate affixed to the section block and having the pattern wheel rotatably mounted thereon above said cams, needles having an upper butt which enter the pattern wheel slots and drive the wheel and having a lower butt which engage said cams, jacks in the pattern wheel slots movable between a needle actuating and a non-actuating position, the jacks including a set of butts at each of a plurality of different levels and the butts of each set being on selected jacks only, means operable to preposition the jacks during rotation of the wheel, and an actuator for each set of butts mounted on said plate for movement relative to the pattern wheel and operable to change the positions of the jacks on which such butts are located prior to needles entering the slots wherein such jacks are located.