GB942347A - Improvements in yarn feeding and controlling mechanism in multi-feeder circular knitting machines - Google Patents

Abstract

942,347. Knitting machines. WILDT MELLOR BROMLEY Ltd. Aug. 17, 1962 [Aug. 17, 1961], No. 29683/61. Heading D1C. A yarn feeding and controlling mechanism in a circular multifeeder knitting machine comprises two automatically controlled elements in association with each yarn feed wheel which feed yarn around a slip-resisting surface of the yarn feed wheel and are pivoted to move from a position where yarn is fed around said wheel to a position where said yarn is held clear of the wheel. A silicone-elastomer covered yarn feed wheel 7 (Fig. 2) is driven by bevel gears 12, 13 and a shaft 9 from a central machine shaft. Fulcrum pins 14 mounted on a small block 27 fixed to two vertically spaced rings 28, 29 support yarn guiding elements 8, 8<1> and pinions 15 are fixed to arms 8a of said yarn guiding elements to mesh with racks 16a, 16b which are attached to the rings 28, 29. The yarn 7 is fed through porcelain eyelets 21 at the ends of the yarn guiding elements 8, 8<1> the position of a plate 20 containing one of these eyelets being adjustable (Fig. 2) to place a differing amount of yarn in contact with the yarn feed wheel for a given position of the yarn guiding elements due to the taper of the feed wheel 7. The ring assembly 28, 29 is moved by an arm 32 (Fig. 8) connected through a bell crank 33 to a cam roller 34 which is acted upon by cams 35, 36 in the machine head wheel (Fig. 10). The cam roller 34 is normally retracted out of contact with said cams 35, 36 by a spring 44 but is brought into engagement by the action of cams 52, 53 on a roller (not shown) which depresses the bell crank 33 by means of a linkage system 47, 49, 50, 51. The relative motion between the rack and pinion gearing caused by the movement of the ring assembly 28, 29 causes more or less yarn to be placed in contact with the yarn feed wheel 7 depending on the direction of the relative movement. Drums or equivalent bodies as disclosed in Specification 428, 799 can also be used to control the operation of independent parts of yarn guiding elements 8, 8<1> deviation.