Patent GB-488098-A (GB)
Title: Improvements in tuft yarn setting frames for winding spools used in carpet manufacture
IPC: D03D39/06
Filed: 1936-12-30
Abstract: 488,098. Tuft-yarn setting-frames. SPIERS, Ltd., W., and PORTER, D. Dec. 30, 1936, No. 35721. [Class 142 (iv)] In tuft-yarn setting-frames for winding tuft yarns on to spools used for carpet manufacture, the spool 10, Fig. 4, when being wound is acted upon by three rollers 6, 7, 8, the upper rollers being positively driven as shown, whilst the pressure roller 8 is driven frictionally by the spool or all the rollers are positively driven. The roller 8 is supported by levers 19<11> acted upon by springs 21 or weights, which may be adjustable, so that the upward thrust of the pressure roller may be adjusted. The roller 6 can be moved bodily along a slide 13 &c. by means of levers 15 to a position clear of the spool to facilitate access thereto, before winding, and by means of a treadle 24, Fig. 3, a link 27 and a bar 23, the levers can be operated to move the roller 8 downwards. The upward movement of the roller 8 may be controlled by a dash-pot or vacuum pump &c. The rollers 6, 7 are driven by chain gearing from countershafts 28, 30. The shaft 28 is geared by two chains 44 to two driving sprockets 37 loose on a shaft 35, having say 19 and 21 teeth respectively and each secured to a gear wheel 38. Similarly the shaft 30 is geared by chains to two sprockets and corresponding gear wheels loose on a shaft 36. A gear wheel 40 splined to a shaft 39 is movable by a fork and rack mechanism operated by a hand lever from a neutral position in which none of the four gear wheels 38 are driven to a position in which gear wheels are driven connected to either the outer or the inner sprockets 37. Thus the shaft 28 may be driven from a sprocket having 19 teeth and the shaft 30 from a sprocket having 21 teeth or vice versa, accordingly as the spool is being over or under wound so that in both cases the roller with which the yarn first contacts has the lowest surface speed and the yarns are tensioned. When changing from over to under winding or vice versa, the direction of rotation of the rollers is reversed either by means of a reversing switch incorporated in the circuit of the electric motor driving the machine, which may be a three phase motor, or as shown, by a reversing gear comprising a swivelling gear quadrant 61 furnished with reversing gears 59, 60 and movable by a handle 63 into the positions shown in full and dotted lines respectively so that the shaft 39 may be driven in either direction from the shaft 43. Locking means described are provided for the quadrant 61 so that this can only be moved when the hand lever for moving the sliding gear 40 is upright, and this gear is in its neutral position, the locking means being such that the sliding gear can only be engaged with the desired pair of gear wheels 38, when the quadrant is in correct position to ensure that these gear wheels are rotating in the appropriate directions. The filled spool 111, Fig. 10, is transferred to a carrier 110, which is also provided with a carrier 128 for an empty spool 113, and the yarns are cut by a tool 122 such as a safety razor blade carried by a slide 121 movable by a cap 129, the blade projecting into the groove 118 between two slotted yarn guiding bars 119, or into the groove in a single vertically-slotted guide bar. The empty spool is held by clips whilst the operator is laying the yarns. When the desired amount of yarn has been wound the machine is stopped by means of an endless chain 78, Fig. 3, suspended from a sprocket wheel 81, rotating with a ratchet wheel driven by two pawls on arms rocked by eccentrics on a gear wheel driven from the pressure roller. This chain has one or more projecting lugs for operating a trip lever 99 connected by an adjustable rod 100 to a lever 101, which controls clutch mechanism or belt gear for stopping the machine. The rod 100 has a knob 103 for hand operation. A bluffing member extending beneath the pawl arms may be operated by means described from an arm to lift the pawls out of operation. A hand wheel is also provided for turning the sprocket wheel 81 independently by hand. According to the Provisional Specification, the cutting mechanism may comprise two slotted knives movable relatively to one another and toggle lever mechanism may be used. A knife made in sections may be used. The tops of the bearings for the front upper spool roller are made flat for the attachment of supporting members for the ends of the spool carriers and cutting mechanism. The end supporting member at each side is recessed and supports a trough comprising rods spaced in semicircular order.