Patent GB-840587-A (GB)
Title: Actuating slide for the needles of a hand knitting machine
IPC: D04B39/00
Filed: 1958-08-26
Abstract: 840,587. Hand knitting-machines. PALIZ-HOLDING A.G. Aug. 26, 1958 [Sept. 7, 1957], No. 27351/58. Class 74 (2). In a hand-operated single flat-bed sliding needle machine, two needleretracting devices 7, 8 provided with stitch cams and arranged mirror-symmetrically relatively to a needle advancing device 6 which incorporates a clearing cam, are individually movable perpendicularly to the plane of the needle bed, between active and inactive positions, by springs 14 and a longitudinally movable cam rail 13 bearing on rollers 12 on guide pins 9, 10 secured to the cams. The rail is moved by operation of a lever 15 which acts through a toothed segment 17 and rack 21. A notched disc 18 locates the devices in either of their two positions and these positions are indicated by the position of spring-retaining plates such as 24 in windows such as 27. A part 22 of each device 7, 8 bears means 22<SP>1</SP> slidable along a slot 26 substantially parallel to a needle guiding edge 22a of the part and formed in a plate 30 supported by the pin 9 or 10. A pin 29 extending from the slide means 22<SP>1</SP> engages between an abutment 31a on a cruciform carrier 31 and a second abutment 32a on a member 32 pivoted on the carrier and rockable against the action of a spring 33. Thus, when the cam lock is traversed, the leading part 22 can yield to the pressure of the needle butts and slide down the slot 26 against the action of the spring 33, to relieve tension on the loops in the needle hooks; but the trailing part 22 cannot so yield, and the needles are fully retracted by its edge 22a. By rotation of a knob 37, the carrier 31 may itself be displaced, to provide simultaneous displacement of the parts 22 in the direction of the slots 26, a disc 36 secured to the knob having formed therein a cam slot 36a into which extends a pin 35 on the carrier. The central device 6 can also be moved, perpendicularly to the plane of the needle bed, between active and inactive positions, by means of a knob 47 on the end of a pin 42 secured to the cam. A ball catch 46 locates the device in either of the two positions. The point of the clearing cam is formed on a slide member 49 which can be slid on the remainder of the cam, to bring the point into a out-ofaction, by rotation of the knob 47, which also rotates a cam 48 acting on a follower 50 secured to the slide. A flap 52, bearing a needleengaging face 52<SP>1</SP>, is pivoted at 53 and is held by a spring 51 against one face of the clearing cam point (Fig. 1) when the point is in active position. When the point is withdrawn, the face 52<SP>1</SP> retracts the needles when the lock is traversed from left to right, Fig. 1; but, when the lock is traversed in the opposite direction, the flap yields as the needles pass over it, Fig. 19. Idled needles may be returned to action by a device comprising a fixed triangular prism 54 against which bear spring- urged plates 55, 56 swingable about pivots 59, 60, and a member 57 swingable on an arm 61 in a direction generally perpendicular to the plane of the bed, between active and inactive positions, under control of a spring 63 and slide 64. Alternatively, the idled needle may be returned by downwardly bent needle-engaging ends of springs, controlled by buttons; a fixed member is then provided below the point of the cam 6.