Patent GB-799131-A (GB)
Title: Improvements in or relating to circular, independent needle, knitting machines
IPC: D04B9/28
Filed: 1954-11-22
Abstract: 799,131. Knitting. HEMPHILL, CO. Nov. 22, 1954 [Dec. 10, 1953], No. 33767/54. Class 74 (2). By means arranged to operate automatically at predetermined times, a needle selecting cam is moved, at different phases of the travel of the rotatable needle cylinder past the cam, during the knitting of different courses of a single knitted article, from a fixed inactive position away from the needle cylinder to a fixed active position against the cylinder where it engages a selector butt on either a needle or a needle-operating jack to move an inactive needle and cause it to knit, the cam being stationary except when moving from one position to the other. A yarn-feeding lever may be similarly moved into and out of feeding position at different phases of the travel of the needle cylinder past it during the knitting of different courses of the article. A spindle 31 bears projections which restrain levers 25 from springing needle selecting plungers 24 into operative position when they would otherwise be permitted to do so by the absence of butts 30 on corresponding pattern discs 26 on a pattern drum 27, The spindle 31 (and a similar spindle 32 also controlling a group of levers 25) is operated by alternative cam tracks 40, 41 borne on a drum 39 and of unequal length, through a rocker 35 having a hinged end 36 which can be swung from one to the other of the tracks. The corresponding yarn lever is actuated by alternative cam tracks 6, 7, borne on a drum 5 and also of equal length, through rocker 3 having hinged end 8. A drum cam 15 operates a rod 20, through connections 14, 17, 18 and 19. The bottom of rod 20 is connected to a shaft 45 bearing collars 47, 48 which swing the hinged rocker end 36; and the rod 20 also swings the rocker end 8 through link 21 and pin 22 in a collar 23 on a sleeve 13, slidable on a shaft 12 and secured to an arm 10 supporting a shaft from which hang studs 11 which engage the end 8. Hinged rocker ends associated with needle selection and yarn levers may, however, be operated independently by separate cams on the drum 16. Fig. 11 shows a fabric comprising a red overplaid R on grey, green and yellow diamonds GY, GR and Y. The grey diamonds are knitted at the main feed and the overplaid thereof at the auxiliary feed; but the green and yellow diamonds are knitted at the auxiliary feed and the overplaid thereof at the main feed. During the first stroke of reciprocation, a course of diamond yarn is knitted at its feed, leaving floats in the wales where the overplaid is to appear and, on the same stroke, the overpaid yarn is knitted these floated wales. On the return stroke, the overplaid yarn is knitted through loops of the previous course, in its proper wales, and the diamond yarn is knitted in the remaining wales and floated behind the overplaid yarn. Fig. 12 shows a ground fabric knitted with separate yarns 74-74 which are all of the same colour and polka dots of brown (BR) and blue (BL), the ground yarns being fed at the main side of the machine and the polka yarns at the auxiliary side. Fig. 13 shows a body fabric knitted in areas 86, 87 with separate yarns, and blue, green, brown and red polka dots. Specifications 519,867, 713,030 and 714,282 are referred to.