Patent GB-206085-A (GB)
Title: Improvements in or relating to automatic shuttle feed and discharge mechanism for sewing or the like machines
IPC: D05B57/24
Filed: 1923-03-20
Abstract: 206,085. Segura, C. March 20, 1923. Mechanism for automatically extracting and inserting shuttles.-A sewing-machine in which a shuttle is driven along a circular path in a shuttle box having normally-closed exit and entry openings is provided with automatic shuttle discharge and feed mechanism. On a shaft 10, journaled in the shuttle box 1, Fig. 1, and driven bv chain gearing from a shaft 6, is mounted a disc 11 having a projection 12 for driving the shuttle 13. A shuttle-feed column 15 integral with the box 1 has a groove 16, 17 to receive the thread ends 21. The floor 23 of the column is pivoted at 25 and is spring-supported. The lowest shuttle 19 of the column occupies a chamber 18 having doors 26, 27, Fig. 4, pivoted at 28 and urged apart by a spring 32. The lower ends of the doors 26, 27 have slotted engagement with pins 33 on racks 35, 36 which engage with a central pinion 38, Fig. 1. Projections 39 on the doors engage notches 40, Fig. 4, to limit the movement thereof. The rear wall 41 of the chamber 18, Fig. 1, is supported on rods 42 housed in a member 44 and is pressed forward by springs 46 which surround rods 48 fixed to the wall 41 and connected by an adjustable member 52. A rod 53 fixed to the member 52 carries a cam-roll 54 which engages with a cam 55 on the shaft 10. A shaft 60 mounted in the box 1 and driven from the shaft 6 carries a cam disc 61 engaging a roll 63 on a slide 64. The slide 64 is spring-pressed downwards and carries spaced therefrom a roll 71 which passes through the box 1 and. when the roll 63 enters a recess 62 in the disc 61. contacts with the spool 14. A rack 73 on the slide 64 actuates a quadrant 75 on a lever 77. the toe of which is adapted to strike a lever 78, pivoted on the shaft 10. The end 83 of the lever 78 is spring-pressed normally into a notch in the rack 36, while a notch on its other end engages a. lug 87 on a hinged door 85 to keep the door closed against the action of a spring 88. A toothed quadrant pivoted at 89, Fig. 1. is spring-pressed to actuate a rack-slide adapted to pass through the box 1 into the shuttle-race : the end of the door 85 normally engages a stop on the said quadrant to hold the rack-slide out of the shuttle-race. A cam 95 on the shaft 6 oscillates a toothed quadrantal lever 98 which in turn reciprocates a vertical slide 99, a roller 103 on which acts to close the door 85 if it is open. A lever 106 articulated to a lug 104 on the door 27, Fig, 4, is articulated at its upper end to a slide 110, Figs. 1 and 6, so that when said doors are opened the slide 110 enters the space between the shuttles 19, 20 to prevent the latter falling while the wall 41 is forward. The doors 26, 27 are closed by a, lever 116, 114, Fig. 6, which is actuated by a face-cam 112 on the shaft 10. When the machine is running the periodic descent of the roll 63 into the camrecess 62 is limited by the engagement of the roll 71 on the spool-thread; when the thread is nearly exhausted the descent of the roll 63 oscillates the lever 77 sufficiently to strike the lever 78 and so liberate the doors 26, 27, 85. The door 85 opens immediately and allows the rackslide to enter the race to eject the shuttle 13. The doors 26, 27 open and when the roller 54 enters the recess in the cam 55, the wall 41 pushes the shuttle 19 into the race, while the slide 110 holds up the remaining shuttles. On further rotation the door 85 is closed by the roller 103, and the rack-slide is withdrawn from the race. At the same time the doors 26, 27 are closed, the wall 41 having been returned by the cam 55. The lever 78 immediately locks the doors, while the slide 11G is withdrawn allowing the next shuttle to drop into position. Devices for tying the thread at the point corresponding to the insertion of each new shuttle may be. provided.