Patent GB-346072-A (GB)
Title: Improvements in mechanism for producing knitted fabrics having lap stripes
IPC: D04B9/34
Filed: 1930-01-31
Abstract: 346,072. Knitting. HEMPHILL CO., Central Falls, Rhode Island, U.S.A.- (Assignees of Lawson, J. and Lawson, R. H. ; Pawtucket, Rhcde Island, U.S.A.) Jan. 31, 1930, No. 3323. Convention date, Feb. 18, 1929. [Class 74 (ii).] Circular machines; knitting, methods of ; bobbin stands.-In the production of reversely plated stocking fabric with lap stripes plating control is maintained by floatng one plating yarn while lap yarns are knitted in with the other plating yarn on predetermined needles. Plated lap yarn ornamentation is thus introduced at spaced points between which the lap yarns float. Eight lap yarns, more or less are delivered from a feeding device substantially as described in Specification 300,605, [Class 74 (ii), Knitting &c.], consisting of a bobbin stand and feed member 12 mounted for rotation on a fixed axis parallel and eccentric to the axis of the needle circle. The. member is movable vertically on this axis to clear the needles during reciprocation &c. by a pattern-controlled ratchet 59 on the hub of which is an arm 58<1> carrying a pin 58. A lever 56 depending from a, rod 51 which supports the creel &c. has a slotted lower end in which the pin 58 works. The arrangement is such that the ratchet is turned just prior to reciprocation or transferring to raise the parts 56, 51, &c. There is also mechanism for holding the parts in elevated position. The devices for tensioning the lap yarns individually are arranged on a stand above the bobbins. The needles are selected, elevated and presented to the lap yarns by a series of pattern discs 122, 123, 124 mounted on a vertical shaft and operated by a ratchet and pawl driven from the " 104 gear. The cams on the discs control jack cams which are moved into and out of functioning relation to the jacks of the needles to be selected to take the lap yarns. The discs act upon horizontal levers 154, 155, 156 connected to slides 160, 161, 162 carrying jack selecting and depressing cams. Each needle has a jack below it and each jack has a lower butt which in the case of the heel needles are shorter than the rest. There are also two long-butted jacks positioned at the median back line of the stocking &c. The jacks corresponding to the needles which participate in lap yarn knitting are provided with other butts arranged at, say, four different heights. These butts are so placed as to be engaged by the jack cams according to the pattern desired. The elevated jacks are taken down by the corresponding depressing cams while the needles themselves are lowered by the instep cam to a lower level than the unselected needles and are thereby enabled to take only one of the main yarns while the other one floats. A fourth cam independent of the discs 122, 123, 124 controls the knitting of a lap stripe on the median back line of the stocking. During the knitting of the foot the discs are all moved to an intermediate position at which they do rot act on the corresponding needles, which have short butts. During heel and toe knitting the discs are out of action and no lap yarns are knitted. Specifications 20101/09, 256,612, 278,383, 288,727, and 288,994, [all in Class 74 (ii), Knitting &c.], also are referred to.