Patent GB-563898-A (GB)
Title: Improvements in builder motions for ring spinning frames
IPC: D01H1/36
Filed: 1942-06-16
Abstract: 563,898. Automatic reversing-gear; variable-speed ratchet gearing ; toggle linkages. SACO-LOWELL SHOPS. June 16, 1942, No. 8243. Convention date, Aug. 28, 1941. [Classes 80 (ii) and 80 (iii)] [Also in Group IX] In a ring spinning frame the builder motion comprises initial driving means for imparting a straight-line motion to a primary element from which a linear motion is transmitted bv mechanism to the ring rail, means for reversing the straight-line motion imparted to the primary element, two means for determining the position of the points at which such reversals take place-at least one of such means being progressively adjustable to vary the position of reversal controlled thereby-and power-driven mechanism for actuating said adjustable means for varying the position at. which the reversal takes place while the spinning operation continues and is characterised in that adjustable controlling means is provided for the powerdriven actuating mechanism of said adjustable means, such that the extent of the adjustment movement of the adjustable means at each progressive adjustment thereof can be controlled. As shown in Fig. 1, the pointers 80 are guided by rods 81 mounted in the end frames of the section of the spinning frame and are connected at their lower ends to steel bands or other flexible elements 78 fixed to pulleys 77 on cross shafts 76, one of which carries another pulley connected by a band &c. 13 to a block 12 fixed to a rod 10 and forming a continuation of a nut 3 forming the primary operating element and fixed to the rod and engaging a screw 2 forming the initial driving means of the building motion. The screw 2, Figs. 5 and 9, is pinned to a bushing 5 on which is mounted a clutch member 6 rotated therewith by a pin 7 engaging a slot in the bushing so that the member 6 may be slid to engage one or other of gears 8, 9 rotatably mounted on the bushing and driven in opposite directions from a convenient source of power. The movement of the clutch member 6 and so the direction of rotation of the screw 2 is determined by the movement of the nut and block 12, the latter at the end of its movement engaging one or the other of a pair of fingers 14, 15 which form the adjustable means for determining the positions of the points at which reversals of the primary element take place and which are guided by a rod 18 and respectively engage the upper parts of screwed rods 16, 17 which form part of the actuating mechanism for the adjustment of the fingers 14, 15, the engagement causing one of the rods to move endwise and shift a block 22 on the rods. The block 22 is connected by a link 35 with a toggle arrangement which ensures a quick and positive movement of the clutch member 6 and which connects the link to an arm 32 on a rock-shaft 28 mounted in a stationary bracket 30 and carrying an eccentric 31 engaging a socket in a block 26 swivelled by pins and blocks to a shaft 24 fixed to the pin 7 of the clutch member 6. The fingers 14, 15, Fig. 12, are formed with thumb pieces a and pointers b which project through a slot in the frame casing and can be manually lifted from the screws and adjusted to the traverse desired and a bobbin or a replica thereof may be secured to the casing above ,the slot so that the pointers can be easily set opposite the points at which reversal of the traverse of the rail is to take place. If the traverse has to be altered during the formation of the bobbin, the screws 16, 17 are rotated so as to feed the fingers 14, 15 in the same or opposite directions and at the same or different speeds according to the type of winding desired and such rotation of the screws is effected by ratchet-and-pawl means preferably for a brief interval after reversal of the traverse ; the ratchet-and-pawl means form part of the actuating mechanism and extensions of the screws 16, 17 carry respectively sleeves 46, 66 geared together by gears 64, 65, the sleeve 46 carrying a pair of ratchet wheels 44, 45 each having four teeth and actuated by pawls 48, 49 on an arm 47 which forms a power drive for the ratchet wheels and sleeves and which is loosely mounted on the sleeve 46 and actuated by a connecting rod 51 from an eccentric keyed to the bushing on-the screws 2. The arm 47 is oscillated so long as the screw 2 is rotated and a pin 53 projecting from the block 22 engages under the pawl 49 and lifts it out of engagement with its ratchet while the nut 3 and block 22 are moving in one direction, the other pawl 48 then engaging its ratchet and after rotating it four teeth, runs idly on the smooth edge thereof. Upon the next reversal of the screw, the block 22 is moved and the pawl 49 drops into a cut-out 53a in the pin, lifting the pawl 48 out of its engagement with the ratchet 44 by a pin 54 engaging the tail thereof and itself dropping into engagement with its ratchet 45, rotating it four teeth and then running idly on the smooth edge thereof. The e step-by-step rotative movements in opposite directions of the ratchets 44, 45 and sleeves 46, 66 oscillate arms 55, 67 carried respectively by the sleeves, these arms each actuating a pair of ratchet wheels 58, 59 and 71, 72 keyed respectively to the rods 16, 17, one pair of ratchet wheels controlling the winding at one end of the bobbin and the other pair, the winding at the other end. The pairs of ratchets are similarly actuated, the arm 55 carrying a pair of pawls 56, 57, Fig. 13, engaging the ratchet wheels 58, 59 which are oppositely-toothed and provided with a shield 60 which forms the adjustable controlling means for controlling the operation of the ratchet wheels 58, 59 and is rotatable about the end of the screw 16 by a knob 63 ; the shield is of circumferential extent somewhat greater than the distance between the pawls so that by adjusting the shield to engage pins p on the pawls the number of teeth which a pawl is allowed to pick at one stroke is controlled and either or both the pawls may be rendered inoperative or both may be allowed to operate. Graduations on the knob 63.read against an index e on a plate 62 indicate the adjustment. The steel bands may be anchored to the pulleys by wrapping the end portion of the band around a plug 56 which is set into a socket in the pulley with its axis parallel to that of the pulley and'locking the plug in place by a pin grooved at its side to engage the plug and forced into place and secured by a set-screw threaded into the drum ; the set-screw may be released and the plug rotated to adjust the effective length of the band. The toggle arrangement comprises a lever 33 to which the link 35 is pivoted and which is pivoted at one end 34 to the frame ; the other end of the lever carries a pivoted head 37 in a rod 38 slidably mounted in a block 40 and carrying a spring 42 disposed between the block and a nut 43 on the rod, the block being pivotally connected by a pin 41 to the arm 32.