Patent GB-191408652-A (GB)
Title: Improvements in or relating to Circular Knitting Machines.
Inventor: AMES ARTHUR NEWMAN
IPC: D04B13/02
Filed: 1914-04-06
Granted: 1914-08-13
Abstract: 8652. Ames, A. N. April 6. Circular machines; bobbin stands.-Relates to yarn-changing apparatus, the invention being described with reference to circular machines for knitting hosiery. The main thread w<2> may be reinforced by a second thread w<1>, which is twisted round the main thread by mechanism operated by a friction drive as described in Specification 8653/14. The threads w<1>, w<2> pass down a hollow telescopic shaft 40, 41. Surrounding the shaft 40, 41 is a guide-ring 39 carried by an arm 100 from a bracket 23 and supporting an inner ring 101 connected to the rotary cam cylinder by a post 18. Mounted within the ring 101 is a carrier 102, secured to the shaft 40 and carrying a slide 107 mounted in parallel ways. Bobbins are mounted upon a stand 104 fixed to the shaft 40, the threads w<3>, w<4> from which pass through eyes in the slide 107 to the needles. During circular knitting, the slide 107 is clutched to the ring 101 by a spring 111 and by the engagement of a tongue 109 with a stop 110 on the guide-ring 39, and the stand 104 is thus rotated. When the clutch of the driving-mechanism is shifted to produce the heel or split foot of a stocking, a stop-slide 117 is put in by the pattern mechanism to arrest the stand 104 &c. by contacting with the tongue 115 of the slide 107, rebound being prevented by a latch 123. The lever 38 which controls the operation of the twisting-mechanism on the thread w<1> also holds a sleeve 128 in one of two positions of elevation to control the tensions of the threads w<3>, w<4>. These threads pass from the bobbins up through eyes 127 across the upper surface of the arms 126, passing beneath pads 141 and down through eyes 125. The pads 141 are carried by levers 142 mounted on the arms 126, the inner ends being pressed up by springs 144 so that the pads bear on the threads w<3>, w<4>. Other levers 146 pressed up by springs 148 are provided with lugs 150, 151 to bear on the levers 142. The inner ends of the levers 146 are controlled by depressing, during circular knitting, the sleeve 128 by the action of the pin 136 of the lever 38 on a cam 135 on the lever 132, to raise the pads 141 and relieve the threads w<3>, w<4> from tension. During reciprocation (excepting making heel and toe), the pin 136 rests on the cam 135 as shown, and the pads 141 press on the threads with only the force of the springs 144. During narrowing and widening at heel and toe, the pin 136 rests on the campart 134 and raises the sleeve 128 to the highest position, causing the pads to bear heavily on the threads. When the machine changes to circular motion, the slide 107 acts to throw out the spring take-up arms which are in work during reciprocation. The threads w<3>, w<4> pass to the needles through thread-eyes 61, 62 on hell-crank arms 59, 60 pivoted on the latch ring 19. To effect the changing of the threads, the position of the arms 59, 60 is changed alternately by means of a slide 53 resting on arms 52 of the latch ring and having notches 54, 55 which act on pins 65, 66 on the short arms of the bellcranks 59, 60, When the slide is. shifted, the thread-guide which was out of action first comes into feeding position, and then the other thread-guide is taken out of action. The slide also operates an oscillating member 81 on the latch ring, which closes the slot 80 and prevents the latches of the needles from dropping. The thread arms 59, 60 also carry plates 90 having inner and outer flanges 91, 92 which alternately occupy edge-to-edge positions as shown and close the slot 80 above the plane of the oscillating member. A throat plate 47 attached bv hangers 48 to the latch guard is provided with hooks 51 which hold the threads w<3>, w<4> in position when idle.