Patent GB-473904-A (GB)
Title: Improvements in or relating to circular knitting machines
IPC: D04B9/10
Filed: 1936-04-23
Abstract: 473,904. Knitting-machines. WILDT & CO., Ltd., and KENT, A. W. April 23, 1936, No. 11609. [Class 74 (ii)] A multi-feed circular knitting- machine is provided with controlling means whereby one or more of the feeds may be placed in and out of action as required. The invention is described as applied to the superposed-cylinder type with double-ended transferable needles, for knitting split-foot hosiery. Fig. 1 shows part of the machine, the auxiliary feed and its controlling means being represented at D. Z is the main feed and C an extra feed for use in knitting a split foot. A split-foot feeder 1, rendered active and inactive at each course of knitting, is operated along with a yarn trapping and severing device 3 by a cam 97 associated with a clutch 98 on a vertical shaft 99 driven in unison with the needle cylinders. The feed D includes a pivoted yarn guide 4, movable needle operating cams 5, 6, Fig. 6, a cam 7, Fig. 5, movable in the top cam box 70 and a yarn trapping and severing device 8. A device for controlling the guide 4 &c. includes a constantly reciprocated member 10, Fig. 3, a T-shaped lever 11 pivoted at 26 and a link 38 which is placed in various positions by the cams on the main pattern drum. The righthand end of the link is connected at 26<2> to a lever 35 which carries a pin 36 working in a slot 37 in the member 10. When the parts are in neutral position as shown the member 10 reciprocates idly on the pin 36, whether the auxiliary feed is in or out of action. If the link 38 is moved to the right, under pattern control, the member 10 drops, brings a shoulder 25 within range of a pin 13 and moves the lever 11 counterclockwise. If the link 38 is moved to the left the member 10 rises, a shoulder 24 engages a pin 12 and the lever 11 is moved clockwise. The lever 11 is connected by a link 29, arm 27, and shaft 28 to a drum 9 carrying cams 47 by means of which the various parts of the feed D are moved into or out of working position. The lever 11 may be dispensed with, in which case the reciprocating member 10 is caused to move from side-to-side on a vertical pivot. The left-hand end of the link 38 is made slidable in a coupling member 41 connected to the operating lever 33. A compression spring S between the coupling member 41 and a handle 39 restores the Link 38 to neutral position should it have been moved manually. The yarn guide 4 and a yarn prodder 58 move with a block 50, pivoted at 51 and operated from a cam 44, Fig. 5, on the drum 9 by means of connections 52 ... 55. The cam 7, Fig. 5, is moved by a slide 71 in a block 69 associated with the top cam box 70. The slide is connected by a link 73 to an arm 74 which makes contact with the cam 44. Bolt cams 5, 6, Figs. 3 and 6, are also controlled by the drum 9. The cam 6 is carried on a lever 91 and is put in temporarily to catch a few needles or sliders &c. provided with special butts. These needles knit up the end of yarn which would otherwise be left loose. The cam then goes out of action. The yarn trapping &c. device 8 is opened and closed to receive, trap and sever the yarn by cams 47, 47<1> acting on the arm 88 of a bell-crank the other arm 87 of which holds up a plunger 85. An arm 84, pivoted at 81 to a block 78 and connected to the top end of the plunger 85 carries trapping and cutting elements 79, 80, Fig. 1, which are thus moved up to fixed trapping &c. elements 76, against spring action, by the cams 47, 47<1>. The cam 47 controls the cutter and the cam 47<1> the trapper. In the position of the parts shown in Fig. 5 the cutter is open but not the trapper. On clockwise rotation of the drum the trapper opens and as the cam 47<1> passes from under the arm 88 the trapper closes. The arm 88 is pivoted at 89 and the cam-engaging end is bevelled. The lower end of the cam 47<1> is correspondingly bevelled so that when the drum is moved counterclockwise the arm 88 is deflected and does not mount the cam 47<1> nor open the trapper. Specifications 15008/00, [Class 74], 24290/12, [Class 74 (ii)], 391,212, and 441,715 are referred to.