PROGRAMMED POSITIONING DEVICE FOR THE NEEDLE SELECTION JACKS IN A JACK SUPPORT WHEEL OF A CIRCULAR JACQUARD KNITTING OR WEAVING MACHINE

摘要

Device for the programmed positioning of needle selection punches in a pin-hole wheel for a circular knitting machine or jacquard fabric, of the type provided with a plurality of radial slits separated by the same distance, in each of which is housed in radially sliding manner, a pair of superposed punches (2jacks "), which can be moved from a first position, in which the outer ends of the punches are both essentially at the outer contour of the wheel, to a second position in which a first punch is retracted with respect to the second and a third position in which both punches are retracted with respect to the first mentioned position, characterized in that it comprises a support frame of the wheel, means for producing regular advances, step by step, of the wheel, so that each of the radial slits of the wheel itself occupies successive a previously fixed position in which it momentarily stops, and pushing means, mounted in a sliding manner in said support frame in an aligned position with respect to the slit that comes each time to be in said previously fixed position, so that, as a result of an axial displacement control, they can be introduced radially into said groove to cooperate with both punches housed in the groove itself or selectively, only with said first punch and respectively determine the displacement of the punches from the first to the third to the second of the aforementioned positions. (Machine-translation by Google Translate, not legally binding)