Patent GB-210046-A (GB)
Title: Improvement in knitting machines and methods of forming reinforcements
IPC: D04B9/18
Filed: 1923-11-23
Abstract: 210,046. Hemphill Co., (Assignees of Lawson, R. H.). Jan. 20, 1923, [Convention date]. Circular machines; knitted fabrics; knitting, methods of.-Relates to the formation in stocking or other fabric of triangular and like reinforcements as shown in Fig. 23, by manipulation of certain needles which are caused to take a reinforcing yarn at a point remote from that at which the main varn is fed'. A narrow vertical reinforced strip may be knitted in continuation of the triangular area. The invention is described in connection with a latch or bearded needle machine with a rotary-reciprocating needle cylinder. The instep needles are provided with longer butts than the remaining needles and below each short-butt needle is placed a jack. The central jack 21 or a group of jacks, if a continuation stripe is to be made are provided with long butts 22 and with lateral projections 24, 23 which overhang adjacent jacks on the right and left of the central jack or jacks. The remaining jacks on the right are provided each with short butts 32 and with lateral overhanging projections 33, 34 which are spaced further apart than are the projections 23, 24. The jacks on the left are provided with short butts 26 and with overhanging projections 28, 30 spaced still further apart. The elevation of the jacks is controlled by a radially slidable cam 35 having an inclined face 52 with an undercut edge 53. When it is required to knit a triangular or other reinforced area, the cam 35 is put in by the action of the pattern drum so as to engage the butt 22 of the central jack 21, the butts 26, 32 passing by the undercut part 53 without engagement. As the jack 21 rides up the incline 55, 52 the projections 23, 24 thereon engage projections on the adjacent jacks 25, 31 on the left and right respectively. The jacks 25, 31 move up along or near the under side 91 of the cam 35 with their butts 26, 32 at a level at which they subsequently encounter a cam 56, the incline 57 of which moves the jacks downward to the lowermost level. The reinforcing thread is thus taken by the needle corresponding to the central jack alone. On the second revolution the cam 56 is taken out of action; the jacks 25, 31 are left at the level 94 and the reinforcing thread is taken again by the needle above the jack 21. On the third revolution the jacks 25, 21, 31 ride up the incline 52 together and take thread while the jacks 25, 31 catch up an ,additional jack each, which do not cause their respective needles to draw thread, being taken out by the cam 56. On the fourth revolution also the reinforcing thread is drawn by three needles only. On the fifth and' sixth revolutions the reinforcing thread is drawn by five needles and so on until all the needles provided with lower jacks draw the reinforcing thread. If the cam 56 is permanently out of action the widening of the high splice or like reinforcement occurs at each successive course. The elevated needles are restored by a cam which may be permanently in position. The reinforcing yarn guide may be made longer than the other yarn guides employed and is retained in active position during all circular work whether or not the fabric is being reinforced. Specification 20101/09 is referred to.