Abstract: The coupling joint has on the mating contact surfaces between the tooth and the tooth holder the following characteristics: the upper and lower surfaces which define the stabilisation planes comprise a substantially flat central surface and another two flat surfaces, one on each side of the said central surface, so that the interstice between the central flat surface and the corresponding facing surface of the tooth holder is smaller than the respective interstices between the lateral flat surfaces and the corresponding facing surfaces of the receiving cavity of the tooth; the upper and lower rear edges of the lugs of the tooth have a convex transverse structure; the internal vertical rear edge of the rear lugs of the tooth have surfaces of a shape matching the opposed faces of the tooth holder, giving rise to higher bearing surfaces in the case of transverse bearing on the tooth.

Abstract: A multi-purpose yarn feeding device for knitting machines is described which includes a number of co-axially arranged rotary members which correspond to the number of yarns fed to the respective feeding station, each rotary member being provided with a frictionally yarn engaging circumferential periphery. Adjustably positionable eyelet guides are arranged to guide the incoming yarns towards and guide the outgoing yarns from the circumferential peripheries of the associated rotary members to result in yarn portions being in contact with preselected arcuate lengths of the circumferential periphery to thereby impart selected tractions to the yarns. A spring member having a fixed end and a hook for engaging a yarn portion is movable generally in the plane of an associated rotary member for selectively pulling away the yarn portion from the associated circumferential periphery of the rotary member.

Abstract: Electrically actuated jack selectors for a knitting machine which are normally positioned out of engagement with the needle jacks or pattern jacks of the knitting machine. When each of the jack selectors is actuated, either by a perforated tape loop or by a drum, the jack selector is deflected into a position along the path of an associated needle jack or pattern jack and, upon engagement therewith, displaces the associated jack relative to the cylinder so that, depending upon the direction of deflection of the jack selector, either the needle jack or the pattern jack will not be raised by the cylinder cam. Each jack selector includes a knife edge cam portion that is engaged by a conically shaped tip on the movable armature of a solenoid that is associated therewith. A comb-like element may be used to initially position a group of the jack selectors in order to predetermine the direction of deflection thereof.

Abstract: A selection device for knitting machines having a rotating cylinder with slots around its circumference for accomodating a knitting needle and an associated knitting jack in each slot, the device including a selection tape loop for controlling the jack selectors of the knitting machine. The jack selectors are movable between an operative jack position and a non-operative jack position. Stationary detecting elements co-act with the tape loop for determining the positions of the jack selectors to provide a predetermined knitting pattern. A drive mechanism moves the tape loop in synchronization with the cylinder and relative to the stationary detecting element.