GB160948A - An improved sole sewing machine combining means for stitcher pump, and direct sewing - Google Patents

Abstract

160,948. Kagansky, A. Jan. 3, 1920. Boot-sole sewing-machines.-Means is provided to enable the machine to perform at will any of the three operations of direct sewing, i.e. sewing a sole directly to an upper, outsole-sewing, and turnshoe-sewing. For direct sewing a chain stitch is employed while for outsole and turnshoe sewing a lock-stitch is used. The main shaft 31 carried in brackets 35 drives through bevel wheels a shaft 36 mounted in the frame 33 and carrying the drum 37 having three cam grooves 40, 41, 42 operating various of the stitch-forming devices. Rotary horns; chain-stitching; feed by presserfeet.-For direct sewing the shoe is supported on a rotary horn 23 within which is mounted a whirl rotated through shafts 25, 27 and bevel wheels 26, 28 by the shaft 31 to lay the thread in the barb of a needle 113 carried by a needle bar 48 on which is secured by a bracket 47 a roller running in the cam groove 42, whereby the needle bar is reciprocated. A combined presser-foot and feeder 107 is slidably carried by a rod 91 and is actuated to feed the work by a cam 112 on the shaft 36 through connections including the rock shaft 110, arms 109, 111 and link 108. The foot 107 is lifted at the end of its feed movement to allow the spring 127 to effect its return by a cam on the shafb 31 which actuates a vertical rod connected to the bar 91. In order that the needle shall always penetrate the work from a distance determined by the thickness of the work, the foot I07 carries an extension attached to a plate 116 hinged to the frame, and a roller 117, carried on a stem 118, Fig. 5, secured to a two-part ramp 119 which is mounted in the cam groove 42, bears upon the plate 116 to set the ramp and so vary the needle bar motion. Outsole-sewing; turnshoe; lock-stitching by shuttles; needle-driving mechanism; disconnecting.-For outsole and pump sole sewing, the whirl in the horn 23 and the feed foot 107 are rendered idle by removing a collar 131 to disconnect the bevel gear 28 and by disconnecting the link 108 respectively, and the rotary shuttle 63 driven through a countershaft and bevel gearing from the shaft 36 is used in conjunction with the needle 55 and awl 56, Fig. 7, mounted in the toothed sectors 52 and 53 respectively. The needle 55 is driven by a rack 49 on a bar 45 carrying a roller which is inserted in the cam groove 40, while the awl 56 is driven by a rack 50 on the bar 48 carrying the needle 113, the roller on the bar 48 being for this purpose removed by the groove 42 and inserted in the groove 41. The thread 124 is led from the horn 23 through an intermittently actuated locking device 121 123 round the stationary pulleys 133, 134 and the pulley 136 on the take-up arm 109 to the looper 87 which is actuated from cams 72, 86 to lay the thread in the hook of the needle 55. A member 68 actuated by a cam 64 spreads the thread loop for the shuttle 63. For outsole sewing the fixed slotted work rest 88 is used and the foot 89 is raised and lowered intermittently by the arm 90 connected to the rod 91 and moved sideways to feed the work by the threaded bolt 92 actuated by the cam 94. For turnshoe sewing the rest 88 and foot 89 are replaced by the yielding work rest 95 and the foot 96, Fig. 10. Frames.-To facilitate the operation of turnshoe sewing the frame 33 carrying the shaft 36 and drum 37 and the lock-stitch forming devices may be tilted forwardly about the shaft 31, by a winch carried in the fixed bracket 35 and a chain attached to the movable frame 33. Presser-bars with periodic control.-The tension bar 91 is threaded through a nut 99 housed in a box surrounding the bar, thereby allowing adjustment of the bar vertically. The edge of the nut is serrated and is engaged by the end of a lever actuated by a cam on the shaft 31 to lock the nut to the bar once in each stitch-forming cycle.