Patent GB-491213-A (GB)
Title: Improvements in and relating to knitting and knitting machines
IPC: D04B11/20
Filed: 1937-02-25
Abstract: 491,213. Knitting. SMITH, T., (trading as WHYTE & SMITH), WOOLLEY, G. H., and HALL, I. Feb. 25, 1937, No. 5714. [Class 74 (ii)] A straight-bar machine for producing intarsia work has means for passing the yarn carriers transversely of the line of needles from one side to the other and back again and means for shogging them over at least one needle space while at the back so as to wrap the threads round the end needles of adjacent groups. The invention is described in connection with the production of a stocking fabric composed of intarsia work with a single needle overlap as shown in Fig. 2, the carriers supplying the thread a and b, being passed between the needles at the end of their traverse and shogged one needle space to left or right as shown in Fig. 3. As shown, two main carrier rods 13, 14<1>, Figs. 7 and 8, are slidably mounted in a block 17 that is transfixed by a rod 18 and is formed with a cam slot 19 which coacts with the rod 18 to move the carriers across the needle line when the block is raised and lowered by a cam on the main shaft. The vertical movement of the block also raises the carriers clear of the sinkers when at the front of the needles, and causes them to loop the threads beneath adjacent sinkers when at the back. To permit of these movements, each carrier rod is connected to a friction box by two converging pivoted compound links. Since all the carriers feeding threads to a division of the needles complete their traverse before the sinker advance, the carriers and sinkers are operated by separate cams on shafts 27, 29 which are connected to the main shaft in turn by clutches 31, 32. For this purpose the shaft 21 is shogged by cam flanges 35, 40 of different diameter acting on a relatively stationary arm 37 on a shaft 38 that is rocked every second revolution of the shaft 21, to move the cam truck 36 to the appropriate radius, by the action of a cam 41 on members 42, 43, 44, 45 and by a cam 46 which disables the arm 44 when the shaft 21 is rotating with the clutch members 31, 33 in engagement. The carrier rods 13<1>, 14<1> are controlled at the end of their traverse by stops 50, 50<1>, Fig. 7, slidably mounted in blocks 51, 51<1> and operated by clawker driven stepped discs 53, 53'. The carrier rod 13<1> may also be moved over the width of one needle group by removing a distance piece 55 that is normally positioned between the rod and the stop 50 which moves it lengthwise of the carrier rod on a support 56. Movement of the distance piece transversely of the rod is controlled by springs 59 and by a cam 58 that is rocked by a clawker 61 controlled by a pattern chain 62, a peg 60 being provided for holding the member 55 against endwise movement when inoperative. Warp-threads may be fed to certain needles in each course, for patterning purposes by additional carrier rods 63<1>, 64<1> mounted in the block 17 and adapted to be shogged by members 67, 66, 71, Figs. 7 and 8, under control of a screw 65 at each end of the machine. The screw 65 is driven by oppositely disposed ratchets 72, 73, Fig. 8, rotated by clawkers 74, 75 on a block 76 that is moved vertically on a post 76 by a cam 80. The clawkers are further controlled by a bluffing segment adapted to be rocked by one or other of two pawls 92, 93 that are disabled in turn by a rocker 91 operated by the screw block 69. Fig. 7 engaging a stop 82 or 83 at the end of its traverse.