Patent GB-190120211-A (GB)
Title: Improvements in or relating to Circular Knitting Machines
Inventor: BERRIDGE ISAAC LOVELL
Filed: 1901-10-10
Granted: 1902-10-10
Abstract: 20,211. Berridge, I. L., and Kerr, B. Oct. 10. Circular knitting-machines. -Relates to means for holding down the work, for automatically changing the rotation of the cam cylinder from reciprocatory to rotary, and for putting the instep and heel and toe needles into and out of action. Instead of sinkers for holding down the work, notched segmental loosely-pivoted keys A are used. These keys are pulled down by springs E, and are raised in succession by a rotating cam C. Notched blades G between the keys A prevent the work from rising. Fig. 14 shows the cylinder cams. The cam g is only used in knitting heels and toes, and is put out of action when making tubular work. The cam cylinder is driven by a bevel-wheel 5<a>, fast on the shaft 5, to which is feathered a clutch 9. A pinion 7 in one with a loose sleeve 6 gears with a toothed sector carried by a pivoted arm 8, which is rocked by means of a connecting-rod and crank from the shatt M, which is geared to a pinion which, together with the driving-pulley, is carried on a loose sleeve 10, 11. When the clutch is moved to the right, as shown in Fig. 13, the cam cylinder rotates, and when to the left it reciprocates at a slower speed. The clutch is moved automatically by means of a slide block H, which has a pin engaging a slot 0 in a slide N. The slide N is moved in one direction or the other by one of two spring-actuated clawkers R, constantly rocked by means of a pivoted lever and an eccentric on the shaft M. The clawkers R are raised out of or lowered into gear with the slide N by flats n<2> on the end of a shaft S, which is rotated at the required times by a star-wheel s<3> and projections s<1> on a pattern-wheel or chain which is rotated by a ratchet-wheel 16<x> and clawker 15<x> operated by a pivoted lever 6<a> and eccentric from the shaft M. The belt fork H<1> is moved off the driving-pulley by a coiled spring acting on the shaft I when the rod K is rocked by hand. When the slide N is moved to cause the cam cylinder to reciprocate, one of the pins o<2> acts on the tail of a plate P, and causes it to rotate sufficiently to enable the slots q<2> therein to move the double needle shifters Q radially. The tails of the instep needles beyond the butts engage notches q in the double needle shifters, and, as the needle shifters move radially, they put the needle butts into or out of range of the knitting cams. The single needle shifters for the heel and toe needles are moved to their normal position by springs 1<x>. The heel and toe needles are moved out of range of their cams by means of the usual toothed rack sectors 4xx. These sectors are operated by means of two pawls 7<x>, pivoted below an arm 6<x> which is oscillated by means of the above-mentioned pivoted lever 6<a>. The tails of the pawls 7x have spring catches 10x which engage a rack 11<x> on the underside of the lever 6<x>. One or other of the teeth 7<a> of the pawls 7<x> engage the corresponding rack sector, according to the position of the pawl 7x. The pawls 7<x> are reversed in position by means of the projections 19, which come in contact with pins projecting above or below the toothed rack sectors.