Patent GB-190705993-A (GB)
Title: Improvements in Machinery for Knitting Fabrics with Eyelet Holes
Inventor: SCOTT ROBERT WALTER
Filed: 1907-03-12
Granted: 1907-07-18
Abstract: 5993. Scott, R. W. March 12. Knitting-machines.-Relates to latch-needle or other machines for rapidly producing ornamental ribbed or plain fabrics, with eyelet-holes formed by transferring sinker-wale loops to adjoining needlewales. Fig. 1 represents a single-feeder machine for making plain eyelet-hole work. Working in conjunction with the cylinder needle cams is a dial containing a number of transfer points 5 not greater than half the number of cylinder needles 2. The end 5<a>, Fig. 12, of each point is in a different lateral plane of the stem, and is connected thereto by a diagonally-inclined intermediate portion 5<b>, meeting a shoulder 5<c>. When the sinker-wale is required to engage adjoining needles on both sides, a pair of transfer points may be used, or a single point, Fig. 15, provided with a forked head split horizontally. Fig. 3 is an underside view of the dial cams. The transfer points are first projected between adjoining needles, which then receive yarn, by a cam 19. When the needles are depressed to draw stitches, the sinker-wales are first held by the transfer points, and then slackened by a partial rise of the needles. The points 5 are then still further projected by the cam 20, and the sinker-wales are brought in front of the adjoining needles by the inclined amfaces 5<b>, The needles then rise to take the sinker-wales, which are somewhat slackened by a slight inward movement of the transfer points along the cam 23, after which they are withdrawn by the cam 22. If the cams 20, 21, 22 are moved out of action into the positions shown in dotted lines, the points 5 are not projected sufficiently to engage the sinker-wales, and ordinary work is knitted. If the cams 21, 22 are retained in action, there is a slackening of the sinker-wales, which increases the size of the eyelet-holes if occurring previous to a transfer. If the cam 21 alone is in action, sinker-wales are successively accumulated on the points. If the cam 21 alone is out of action, the empty transfer points projected by the cam 20 act as web-holders. In multi-feed machines, a number of sets of cams 20, 21, 22, 23 are placed at intervals in the dial. If one of the plain projecting cams 20 is replaced by a rotating wheel 25<a>, Fig. 11, having alternately shallow and deep notches, eyelet-holes are formed in some of the needle wales in one revolution, and in others on the next revolution. If the down-throw cam corresponding to 22, Fig. 3, is dispensed with, the sinker-wales are accumulated on the points. Two consecutive sets of cams may each be provided with a notched wheel in addition to the out-throw cam 20<a>, in which case two courses of wales are received on the points, the second wheel also correcting any displacement in transit of the projected points. To allow of the eyelet-holes being grouped to form patterns, the transfer points can be divided into a number of sets operated by independent cams, the number increasing with the complexity of the patterns desired. The needles are carried in the dial and the points in the cylinder, the points being each provided with two butts. The upper butts of all the points run in the uppermost race, which is provided with transfer cams. The lower butts of the transfer points run in races, equal in number to the sets of points and provided with switches by which the points of any set can be projected, at will, at the position where the needles engage the knitting - yarn. Sinker - wales are consequently formed below the points. The subsequent movement of such points, occasioned by their butts passing through the transfer cams, fails to effect a transfer such as is made by other points not previously projected. The transfer points may be placed in the dial, and the needles in the cylinder. In this case, the points are divided into not more than three sets, and each point has one butt, which is acted on both by the transfer cam and by the cam determining the transfer. Transfer points with the ends 5<a> in the plane of the stem may be applied to rib machines.