Patent GB-191229073-A (GB)
Title: Improvements in or relating to the Relative Positioning of the Work and the Tool or other Operating Means in Machines used in the Manufacture of Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D43/02
Filed: 1912-12-17
Granted: 1913-12-17
Abstract: 29,073. Boult, A. J., [United Shoe Machinery Co.]. Dec. 17, Boot - sole sewing - machines; lasts, mounting.-A welting-machine in which the work is automatically progressively operated upon without the assistance of an operator, and in which means is provided to swing the stitching - devices a n d the work relatively to ensure that the stitching-devices shall operate along the proper path, is provided with a device operated at regular intervals to swing the stitching - devices a n d work relatively to each other, the said device being set by a feeler engaging the contour of the sole or of a pattern. No sewing- machine is described, but in the application to a channeling - machine, the sole A is supported between the clamping plates 23, 24, which are carried at the free end of a frame 25, the other end of which is pivotably supported upon a vertical shaft 26 mounted in one end of a second frame 27, itself pivoted at its other end upon a vertical shaft 28 supported in the frame of the machine. The upper clamping-plate 24 is mounted upon a sectional shaft carried in the frame 25, the two parts of the shaft being drawn together against the pressure of a spring by handles 33, 34 when it is desired to introduce or to withdraw a sole blank. Radial arms 36, 37 project from the shafts on which the clamping-plates are mounted, and are connected by links 38 with arms 39 secured on the opposite ends of the vertical shaft 26. The arms 39 are also connected by links 40 with arms 41 secured to the shaft 28. The correcting movements imparted to the work-carrying head are controlled by a feeler 42 engaging the periphery of the sole blank. The feeler is yieldingly held against the sole by a spring on a rod 68 joined to a lever 63 connected to the end of the feeler The rear end of the rod 68 is adapted to be engaged by a cam-operated lever 70, Fig. 4, which operates to lift the feeler after each setting of the correcting-mechanism. The lever 63 carries a roll 65, which may be engaged by converging cam surfaces 72 on a cam lever 73. The lever 73 is pivoted at 74 to a disk 75, which is mounted to turn freely upon a shaft, and the rear end of the lever is connected to a block sliding in an arm of a lever 77. The other end of the lever carries a cam roll engaged by a cam operating to force at intervals the cam surfaces 72 down over the cam roll 65. As the cam surfaces move down; one or other will engage the roll if it has been displaced by the feeler and will cause the lever 73 to slide backwards or forwards, rotating the disk 75 in doing so. Immediately the disk has been moved it is clamped in its adjusted position by the camactuated withdrawal of a spreader block 80 from between the ends of brake shoes 79. The cam lever 73 is then raised so that the roll 65 is free to be moved again. The movement of the disk 75 adjusts the position of a roll 86 on the end of an arm 87 pivoted to the frame and connected by a link 88 with the disk 75. A lever 89 similar to the lever 72 and having similar cam surfaces 90 is pivotally connected to an arm in which a block is reciprocated carrying oppositely directed pawls 50, 51 engaging separate ratchet-wheels secured to a shaft connected by bevel-wheels with a shaft 47. The shaft 47 is geared to the shaft 28, and so the movement of the ratchet-wheels due to the pawls operates to swing the work. As the lever 89 is depressed, the cams 90 engage the roll 86 and cause the lever 89 to slide, thus moving the pawl-carrying block and causing the ratchetwheels to be operated.