Patent GB-469507-A (GB)
Title: Improvements in and relating to knitting machines
IPC: D04B9/38
Filed: 1935-12-24
Abstract: 469,507. Knitting-machines. BOOTON, W. E. Dec. 24, 1935, No. 13399 /36. Divided application. [Class 74 (ii)] In addition to the usual pickers, a circular machine has one or more movable pickers that can be moved circumferentially of the needle cylinder and the cam ring during rotary knitting in order to introduce or remove needles &c. from the knitting track for fashioning or mock fashioning purposes e.g. in the production of the leg and foot portions of a stocking. The invention is described in connection with the production of a stocking with fashioned edges and mock fashioning marks extending parallel therewith, the needle cylinder having a portion devoid of needles across which the yam is floated during rotary knitting. As shown in Figs. 1 and 2 the machine comprises a rotary needle cylinder 20 provided with needle jacks and bits 23, 24, the widening pickers 29, 32 which operate during reciprocatory knitting, stationary and movable fashioning pickers 71, 78 respectively and movable mock fashioning pickers 98, 100. The movable pickers 78, 98, 100 are carried by rings 79, 92, 101 respectively which rotate with the cylinder but are capable of circumferential adjustment thereon, e.g. to the extent of one needle space at a time, under or against spring action, the rings 79, 92 being biassed against stops 81, 94 on the cylinder by springs 80, 93 and the ring 101 having a stop cam 103 which is held against needle butts 97 D by a spring 102. For fashioning the foot bottom and leg portion during circular knitting, the fashioning pickers 71, 78 operate on butts at levels E, F, G on needles with butts at level A, the first needle of a group 70E being picked up at spaced courses by the stationary picker 71 and the last needle of a group 72F being picked up by the movable picker 78 which overtakes the needles to the extent of one needle space, at each picking operation, under control of a group of butts 73G. The butts thus raised by the pickers 71, 78 are brought within range of dividing cams 74, 87 respectively which raise them further so as to bring butts at level A into the track of the sole cams 40, 41. This additional movement of a butt 72F brings its associated control butt 73G into engagement with a cam 88 on the picker 78 and steps the latter round the needle cylinder, against the action of the spring 80, to the extent of one needle space, the raised butt 73G taking the place of the stop 81. The picker 71 with its cam 74 is controlled by a pattern drum 77 encircling the base of the cylinder and the picker 78 is operated at spaced courses by a pattern controlled bolt cam 85. Divergent lines of fashioning marks spaced from the fashioned edges, e.g. by 16 wales, are produced by mock fashioning pickers 98, 100 operating respectively on the trailing edge of a group of butts 97c on needles 75a, 27a, Fig. 6, and on the leading edge of a group of butts 97C on needles 75A, the picker 98 being stepped anticlockwise round the needle cylinder against. spring action when a cam 99 on the picker is engaged by a control butt 97d of a needle &c. raised by the picker 78 and cam 87. The mock fashioning picker 100 acting on the opposite side of the gap 21, Fig. 6A in association with the stationary fashioning picker 78, is moved in a clockwise direction under spring action and the extent of one needle space when the picker 71 and cam 74 raise a needle jack and remove a butt 97D from the path of the stop cam 103. The mock fashioning pickers are operated by a bolt cam under control of the pattern drum 77. Similar fashioning with mock fashioning marks is produced in the leg and thigh portions of the stocking which is completed by knitting the welt. The movable pickers are returned to their initial positions during the first course of reciprocatory knitting by bolt cams 131, 132, depressing the butts 70E and 72F respectively, the lowering of the butts 70E causing the associated butts 97D to move the picker cam 103 circumferentially against the action of the spring 102 and the movement of the butts 72 F removing the associated butts 73G and 97d from the spring biassed stop cams 88, 99. Specifications 17979 /97, [Class 74], 288,350, 337,011, [both in Class 74 (ii)], and 376,417 are referred to.