Patent GB-190202079-A (GB)
Title: Improvements in Knitting Machines.
Filed: 1902-01-27
Granted: 1903-02-27
Abstract: 2079. Gimson & Co. (Leicester), and Brooksby, E. Jan. 27. Circular knitting-machines.-Relates to a machine for automatically knitting stockings with fashioned ribbed legs. The cam cylinder is rotated at a quick speed through a train of wheels g, g<1>, g<2> g<3>, C, and H or H<1> and reciprocated at a slower speed by wheels g<2>, g<3>, C, and H or H' according as the clutch is moved into gear with the wheel g, or g<3> by levers controlled by lugs on the time-wheel A. The cam cylinder has an extension B<x> which carries the two loose wheels H, H<1> and a loose sleeve or ring G. The wheels H, H<1> have inclined projections I, J and the ring G has corresponding projections, an inclined slot G, with which engages a pin g<x> on the extension B<x>, and a fixed projection F. When reciprocation is to commence, the time-wheel A, by means of lugs, moves the clutch and also moves a lever into the path of the projection F. The rotation of the ring G is stopped by the projection F coming in contact with the lever and, consequently, it is moved alternately into gear with the wheels H, H<1> and the cam cylinder is slowed down at the end of each reciprocation. The time-wheel A is loose on its shaft and is driven, step by step, by means of a pin a<18> on the wheel C, which acts on a pivoted segment a<19>, to which is pivoted a pawl a<12>. The pawl a<12> moves the ratchet-wheel a<11> one tooth at every rotation of the wheel C. When a cam tooth a<17> on the wheel all comes under the tail of a pawl a<15> pivoted to the segment, the pawl is shifted a tooth on the crown ratchet-wheel formed on the edge of the time-wheel and the other end of the segment comes into the path of the pin a<18> ; consequently, at the next rotation of the wheel C, the timewheel is moved on a step. Lugs a' &c. on the timewheel act on pivoted dogs a<3>, which, in turn, act on levers which move the various cams and controlling-levers as desired. Loop transferrers D, Figs. 7 and 8, for use in fashioning the leg, are placed in the frame-needle tricks. The points or shoulders d, d<1> hold the loops of the rib or frame needles which are to be transferred into the path of the adjacent needles, to ensure the hooks taking the loops. The cams are arranged to put both frame and rib needles out of action when they have parted with their loops ; or they may be operated in such a manner as not to go out of action, but to produce a new loop. The hooks of the needles, which are to receive or part with loops, are made longer than usual, to facilitate and ensure proper transference. The instep needles are raised out of and lowered into action by the cams a<6>, a<7>, shown in two positions and in section in Fig. 17. The cam is operated by a lug on the time-wheel. During narrowing, the end active needles are raised one by one out of action by auxiliary cams d<9> pivoted to the main cams d<6>, which are carried on a pivoted lever d<11>. When a needle impinges against the cam d<9>, it causes the lever d<11> to swing over to one side or the other. During widening, the end inactive needles impinge on the auxiliary cam d<10> pivoted on the lever d<11>, and cause the arm to swing over ; at the same time, the end needle is turned down into action. Fig. 18 shows a modified form of the cams for fashioning. The cams are controlled by lugs on the pattern - wheel. The machine and frame needle loops are held down by the points l, Fig. 2, of web holders, which work in tricks in a ring l<4> and are operated by the cam l<5> ; the additional hooks l<1> hold down the fabric. For splicing, the additional thread passes through a hole in a spring trapping-wire N, which is pulled to the position shown in full lines in Fig. 16 by the tension of the tread as it is being knitted. When the thread is to be broken, the lever M, operated by a rod controlled from the time-wheel, forces the conical end of the trapping-wire into a recess and the thread is held and consequently breaks. When the operating-rod falls again, the trapping wire springs out to the position shown in dotted lines and holds the additional thread in the path of the needles, which take it and knit and draw the trapping-wire down to the position shown in full lines.