Patent GB-190220479-A (GB)
Title: Improvements in Machinery for Making Boots and Shoes
Filed: 1902-09-19
Granted: 1903-09-17
Abstract: 20,479. Phoenix Boot Machinery Co., [Keats, J.]. Sept. 19. Boot-sole stitching-machines ; leather-sewing machines.-Relates to a machine for lasting boot and shoe uppers and sewing them to the welt and insole, or to the sole alone when for turned shoes, in a single operation. The operative parts of the machine are actuated by cams on the shaft a, Figs. 2 and 3. The work is supported on the fixed abutment d, and is engaged by the presser-foot e carried in the guide f by the forked lever i actuated by the cam m. The leather is drawn over the last by the pair of pincers or grippers n, the upper jaw of which is elastically mounted on the lever q to compensate for variations in the thickness of the material, and is operated by the cam o to open and close the grippers. The lower jaw is carried by the slide s, actuated through the link y and beltcrank lever x from the cam p, by means of which the necessary pull is exerted on the material, the link y being adjustably connected to the lever z, as shown in Fig. 2, to enable the throw of the slide to be regulated. For removing and smoothing out the creases of the leather, a second pair of grippers 1, 2, Fig. 3, is employed, the upper jaw 1 being elastically mounted on the lever 3, which is pivoted at 8 and connected to the sleeve 6, Fig. 2, on the vertical spindle k. The cam 10 actuates the sleeve 6 to open and close the jaws. The lower jaw 2 is fixed to the pivoted plate 11, Fig. 3, which is connected by the arm 12 and link 13 to the handlever 14, the arm 16 of this lever having a bowl 17 engaged in the segmental slot 18 in the lever 19 actuated by the cam 20. In the mid-position of the lever 14, as shown, the cam 20 does not affect the grippers 1, 2, but, by shifting the lever 14 to one side or the other, as required, the cam imparts to the grippers the lateral movement necessary for smoothing out the creases. After each operation by the grippers, a stitch is inserted in the work by the sewing-mechanism, which comprises the awl 22, the needle or hook 21, the oscillating shuttle 34, the appliance 41 for laying the thread in the hook of the needle, and the take-up or tightening lever 42, this lever drawing the thread from the bobbin 43 through a receptacle 50 contiining melted wax. The needle 21 and awl 22 are each curved to the form of an arc, and are adapted to interlock with and support each other in the work, in which position the sewing-mechanism is oscillated on the vertical pivot k by a cam acting through the adjustable linkage 54, 53, Fig. 2, to feed the work forward for the next operation of the grippers. The awl 22 is shaped to form a perforation with an internal tongue, which is drawn down into the hole by the loop of the thread when the latter is tightened, the awl carrier 28 being reciprocated in the curved race 29 by a cam acting through the lever 31 and link 30. The needle 21 is mounted on the arm 23 pivoted on the spindle k, and is reciprocated by the cam 27 acting through the slide 25 and link 24 on the extension 7 of the arm 23. The awl first passes up through the work, and is engaged by the needle, both then descending together. The thread is then placed in the hook of the needle, and drawn up by the hook through the work, after which the shuttle 34 passes through the loop, and the latter is tightened by the lever 42 actuated by the cam 47. The shuttle is actuated from the cam 40, through a slide having a pin engaging in the spiral groove 36. The shuttle is provided with a tension arrangement, consisting of a pivoted flattened screw 57, Fig. 27, round which the thread is wound a sufficient number of times to give the desired tension. The thread layer 41 consists of a lever pivoted on the fixed race 29, and is slotted to receive the operating-bowl 52 on the lug 51 fixed to the awl-carrier 28. ln the modification shown in Figs. 28 and 29, the thread layer consists of a small lever 62 pivoted on a rod 61 actuated through the bell-crank lever 59 by the slotted-plate 58 on the awl-carrier, the lever 62 being actuated by the pin 64 on the race 29 engaging in the slot 63 of the lever.