Patent GB-191106768-A (GB)
Title: Improvements in Belt-sewing Machines.
Inventor: JOHNSON GEORGE WILLIAM
IPC: D05B23/00
Filed: 1911-03-17
Granted: 1911-10-12
Abstract: 6768. Johnson, G. W., [Maschinenfabrik Moenus Akt.-Ges.]. March 17. Belting-sewing machines; running-stitch machines.-Machines for stitching belts by means of laces, having a tilting work-table and a double-ended needle, are provided with means for forming even stitches despite variations in the thickness of the work, and with a device for moving the lace clear of the needle. The tilting table 2 is pivoted below its centre between guides 7 carrying holders 6 for the needle 5. The holders 6 and the table 2 are driven by connexion to grooves 21, 22 in a cam-disk 20 on the shaft 12, from a gear-wheel 13 on which take-up levers 8 are actuated through intermediate wheels and levers. The table 2 has a slot 35 for the passage of the work, which is fed by rollers 36 at each end of the table frame, other rollers 38 mounted in swing levers 37, being pressed thereon by springs 39, Fig. 8, On a feathered sleeve 56, Fig. 7, on the shaft of the roller 36 is mounted a wheel 41 gearing with a wheel 42 connected to a collar 43 and mounted in a forked lever 44 pivoted at 45 to the table. The end of the lever passes through a pivoted bearing in a slide 47 on a shaft 48, the slide being movable laterally by a rack 53, gears 50, 49, 52, and a screwed shaft 51. When the table tilts, the lever 44 swings as shown in Fig. 8, and the gear-wheel 42, held by a rollerclutch 57, actuates the wheel 41 and the feedroller 36. A bell-crank lever 60, having a roller 62 resting on the cloth, operates through a rod 67 to move a pressure-piece 54 on the rack 53 to move the slide 47 and thus to adjust the feed. The feed-rollers 36 only act in one direction of movement of the table, the eccentric mounting of which advances the stitch-point in the other direction. A check device prevents backward movement of the wheel 42. To hold the work in position, a wedge-faced slide 79 is forced on to the table by the action of a spring-pressed lever 84, Fig. 7, against a pin 83 on a lever 82 connected to the slide. Guide rods 71 above and below the work carry a fork 72, a needle-guiding arm 73, and a pivoted spring-pressed presser-foot 75 having a rounded claw-like end 76. Bolts 78 on the frame engage the fork 72 and give lateral motion thereto on the tilting of the table. The presser-foot 75 then bears against the lace and pushes it along out of the needle path, the lace escaping from the presser-foot when drawn tight after the next needle-passage. Each guide 7 carries a bell-crank lever 89 normally held across the needle-path by a spring, the lace passing into an enclosure between a resilient finger 94 and a spring 97, by pressing back the finger. When the corresponding holder 6 moves downwards, a projection 98 acts on a roller 90 on the lever 89 to swing it to the right out of the path of the needle, the lace subsequently escaping between the finger 94 and the spring 97. Above and below the table 2 are slides 100, Fig. 20, carrying pincers 101, the slides 100 being connected by springs 104 to rods 105 moved to-andfro by a cam-disk 108 on the shaft 12. The slide 100 in the movement encounters a stop and further movement pushes the projection 110 between the jaws 101 to momentarily close them to grip the lace while the levers 8 act. The lace is guided to the levers 8 by rollers 112 mounted on rods adjustably attached to the rods 105. The ends of the levers 8 are provided with rollers 118, Fig. 21, and with ratchet teeth held in position by a spring-pressed roller. One of the rollers acts as a lace carrier until, on a certain tension, the piece turns to bring another roller is position. The needle 5 is released from a holder 6 by the movement of a resilient check-lever 130, Fig. 21, carrying a holding nose 131, the movement being given by an arm 129 actuated by connexion to a cam 123 on the shaft 12.