Abstract: For controlling selection of needles, intermediate jacks or pattern jacks in a circular knitting machine there is provided a stepwise advanced pattern drum selectively acting on selection slides which interfere with butts of needles, intermediate jacks or pattern jacks. The drum is advanced by a pawl pivoted to a rocking lever controlled by a cam profile the axis whereof is different from the axis of the needle cylinder. The cam is rotated at a speed timed to that of the needle cylinder. The cam has two different profiles at different heights for acting on the lever and may be provided with additional superposed profiles for direct action on the selection slides.

Abstract: A circular knitting machine comprises a base framework and a frame forming a seat for a rotatable assembly of the needle cylinder and a support for other members connected therewith. The frame is constituted by a single block with its surfaces machined by lathe-turning to form internal seats for the bearings of the rotatable assembly and external seats for a cam drum and a program drum.

Abstract: An improvement for knitting pattern areas with hosiery knitting machines having a rotatable cylinder carrying latch needles therein, a knitting station at which a plurality of yarn feed fingers are independently movable into and out of yarn feeding positions for feeding background yarn at a basic level and pattern yarn at a higher level above the cylinder, and means for selectively positioning the needles at either a basic position for receiving only background yarn or an extended position for receiving both background and pattern yarn, the improvement being an auxiliary feed finger for feeding background yarn at a level more closely spaced from the cylinder than the basic level to needles at the basic position and below the latches of needles at the extended position for floating of the background yarn in knitted pattern areas behind loops of pattern yarn formed by extended position neeldes.

Abstract: A circular knitting machine for knitting hosiery has a program drum which can be advanced through short or longer-pitch movements in dependence on an arrangement of removable pins located in seats around the drum. The presence, absence, and length of the pins is sensed mechanically by a control device associated with an incremental advance mechanism for the drum. The speed of the needle cylinder is also controlled in dependence on the arrangement of pins. By changing the arrangement, articles of different size can be produced on the machine.