Patent GB-1488371-A (GB)
Title: Filament winding machines
IPC: B65H81/00
Filed: 1974-05-30
Abstract: 1488371 Traverse mechanism IMPERIAL METAL INDUSTRIES (KYNOCH) Ltd 12 May 1975 [30 May 1974] 24052/74 Heading D1J A traverse system comprises:-(a) a reciprocable member; (b) an endless member passing around rotary supports and carrying a mounting for a filament guide, and; (c) a gear transmission for transmitting the motion of the reciprocable member to the mounting via the endless member with a predetermined amplification factor. In Fig. 1 a yoke 13 is the reciprocable member driven by an endless chain 12 carrying a pin 14, the pin 14 extending into an elongated slot in the yoke 13. The reciprocation of the yoke 13 is transferred to a chain 16 that rotates a sprocket 19. Co-axial with the sprocket 19 is a larger sprocket 20 that causes an endless chain 21 to reciprocate, the chain 21 carrying a filament guide 24. The reciprocation of the yoke 13 is thus amplified. The chain 21 is the endless member referred to at (b). Figs. 3 and 4 show a second embodiment in which as the pin 14 travels around a pulley 11 additional movement is transmitted to the filament guide 46, 47 on the second reciprocable member 23 to make up for the loss of traverse speed that would otherwise take place near the end of each traverse stroke. In Figs. 3 and 4 the reciprocable member is a yoke 13 reciprocated by an endless chain 12 running continuously around pulleys 11. The chain 12 carries a pin 14 that slides in a slot 15 in the yoke 13. The resulting reciprocation of the yoke 13 is transmitted to the driven member 23 by means similar to that described with reference to Fig. 1. Additionally, however, there is pivotally mounted on the yoke 13 a lever 37 that can be oscillated by a pinion 36. The pinion 36 is oscillated by a rack 35 that can be reciprocated by a pivoted lever 33, one end of the lever 33 being pivotally connected to the rack 35 and the other end of the lever 37 being connected to the pin 14. Thus as the pin 14 moves up or down the slot 15 at the end of each traverse stroke of the yoke 13, the lever 37 makes an oscillation back and forth. This oscillation of the lever 37 is transmitted to a lever 40 on the member 23 by chains 50, 51 shown in dash-dot lines and broken lines respectively, these chains passing over pulleys 38, 39 on lever 37; over pulleys 41, 42 on lever 40; pulleys 62 on lever 61; and pulleys 55, 56 on the levers 56. The driven member 23 carries an oscillatable thread guide 46, 47 carried by a sprocket 45. A chain 44 passes round the sprocket 45 and a sprocket 43 that oscillates with the lever 40 such that if the sprocket 43 rotates through an angle α the sprocket 45 rotates through an angle 2α. Thus the member 23 is not only reciprocated by the yoke 13 via the endless chain 21 of Fig. 1, but the thread guide 46, 47 on the member 23 receives an additional oscillation via the levers 33, 37 and 40. In a modified construction, Fig. 6, the yoke 13 is again reciprocated by an endless chain 12 passing over pulleys 11 (only one of which is shown in Fig. 6) the chain 12 being coupled to the pin 14, Fig. 1, that can travel up and down in the slot 15, Fig. 1, as the pin passes around the pulleys 11, 11. This motion of the yoke 13 is transmitted to the larger sprocket 20 of Fig. 1 by the chain 16. However, as the pin 14 travels around the pulleys 11, 11 it rocks a lever 33 about a pivot 34 and this causes a rack 67 to rotate a pinion 66 over which the chain 16 passes.  In this way additional movement is given to the chain 16 and hence through gear mechanism 18 to the carriage 23 in order to advance the carriage from the point of lay of the filamentary material on the takeup mandrel. At the end of each reciprocation of the yoke 13, the advance movement applied during that reciprocation is cancelled and advance is then applied to the yoke ready for the next reciprocation. The degree of advance is adjusted by moving the position of the fulcrum 34 for the lever 33.