Patent GB-564510-A (GB)
Title: Improvements in or relating to yarn changing and splicing mechanism for knitting machines and to knitted fabric containing effects produced thereby
IPC: D04B1/26
Filed: 1943-01-04
Abstract: 564,510. Knitting. HOLMES, H. H., WIDDOWSON, A. H., and WILDT & CO., Ltd. Jan. 4, 1943, No. 139. [Class 74 (ii)] A circular machine with yarn changing and splicing mechanism is provided with means whereby a striping yarn is supplied to a section of the needles while the main or ground yarn and the splicing yarn are supplied to the remaining needles during a course or a succession of courses, and in the intervals the ground yarn only is supplied to the section of the needles and both the ground yarn and the splicing yarn are supplied to the remainder of the needles. Hosiery, such as a half hose or sock, can be made in which the instep ri is composed of partial courses of the ground yarn only inter-. spersed with partial courses hrs of a striping yarn and the sole fb is knitted wholly with both ground yarn and the splicing yarn. The invention may be applied to a double-cylinder machine for knitting hosiery having a welt w, a ribbed top rt, a ribbed leg rl patterned with all-round horizontal striping effects, a ribbed instep ri with horizontal striping effects and a plain fully-spliced sole fb. The ankle portion may comprise a half-round striped section and a high splice section hs formed similarly to the instep and sole. A fully-spliced heel and toe portion may be provided. The striping mechanism and yarn introducing, trapping and cutting means for use therewith may be as 'described in Specification 556;472. The guides E, F for the splicing yarn and for the ground yarn are slidably, or as shown, pivotally mounted for movement conjointly and also in relation one to the other. The guides E, F, as are the remaining guides 3 for the striping yarns, are moved into operative position by a selector member 32 which can be moved vertically into alignment with a lever G, H, or 14, linked by a member 13 to each of the guides. For patterning, the selector member 32 is moved with its shaft 36 by a lever 39 and bar 44 under control of steps 33 upon a timing chain 34. During splicing periods, the splicing yarn and main yarn guide are brought into action by the movement of the bar 44 under control of a cam N on a layshaft 76 running at half cylinder speed. The member 32 is' moved to engage a lever G; H, or 14, by a lever 43 on a hollow sleeve 37 carrying a second lever 42 engaging a cam 35 on the control drum 31. The control drum 31 is racked by means of a pawl 54 and ratchet wheel 53, the pawl being actuated either once or twice to each revolution of the cylinder by cams 60 or 61 on the cylinder driving gear, and being masked by a shield 64 to which can be moved to free the pawl by connections from the bar 44. The roller 59 engaging the cams 60, 61 to actuate the pawl 54 is movable to engage one or other of the cams by a lever 63 under control of the main control drum. To permit the ground yarn guide F being moved into operative position simultaneously with the splicing yarn guide E, but so that the guide F can remain operative while the guide E is moved to inoperative position, the lever H connected to the main yarn guide F is provided with a pin I projecting in a slot J in the lever G associated with the splicing guide E, an adjustable stop K on the lever G engaging the pin.