Patent GB-190512862-A (GB)
Title: Improvements in or relating to Lasting Machines for Boots and Shoes.
Inventor: CUTLAN FREDERICK
Filed: 1905-06-21
Granted: 1906-02-15
Abstract: 12,862. Cutlan, F. June 21. Lasting ; nailing.-Relates to a lasting and tacking mechanism in which the tack-feeding apparatus is preferably similar to that described in Specification No. 70, A.D. 1900, while the tacking- apparatus is substantially the same as that described in Specification No. 7981, A.D. 1895. Each of the lasting-pincers l, m is forked at its upper end, the forks 10 of the jaw l being pivoted at 3 to a block embracing the eccentric portion y of a sliding cam v mounted on the main shaft e, while the forks 11 of the jaw m are slotted to receive pins 6 projecting from a block 5 carried by an eccentric 4 also mounted on the shaft e. Tension springs 8 engage over the pins 6, and also over hooks 9 connected to the forks 11. Another eccentric 12 is arranged on the shaft e close to the eccentric 4, to engage a yoke 13 fixed across the forks 11. The block 5 has secured to it a plate 14 having an enlarged central slot 17, and carrying a stud 20 which passes through slot 19 in a second plate 18. The arrangement is such that, as the plate 14 rocks from side to side and rises and falls, the plate 18 remains centred upon the shaft e, although it is prevented from turning on the shaft by the stud 20. The plate 18 carries a roller 22, which is adapted to bear against the face of the cam v, and, as the shaft e rotates, to force this cam to the right and then to allow it to return again under the influence of a spring t located within the shaft e. The tacking-device is substantially the same as that described in Specification No. 7981, A.D. 1895, except that the tacks, when pushed forwards from the feeding-channel, fall between spring-pressed jaws, which are spread open by the hammer as it descends. The guide portion 28 of the tacker is formed at its lower end as a presserfoot, and has attached to it a plate 34, which is slotted to pass over the shaft e, but is provided with a roller 37 engaging a cam-groove 38 in a disk 39 fixed to the shaft e. This cam raises and lowers the block 28 as the shaft e rotates. The hammer or plunger is also forked, as at 40, to embrace the shaft e, and is raised slowly by the action of a snail cam 45 on a projection on one of the forks 40, but is allowed to fall suddenly under the action of springs 41. A rod 43, extending upwards from the fork 40 through the machine frame, serves as a guide for the plunger. In the operation of the machine, the edge of the toe of the upper is presented to the pincers l, m, which are open, while the cam v is at the extreme left of its stroke. As the shaft e rotates, the roller 22 rides up the face of this cam and forces the jaw l towards the right, while at the same time the jaws are lowered by the eccentrics y, 4, so that the upper is gripped near the edge of the sole. Further action of the eccentrics y, 4 raises the jaws to pull the upper over the sole in the required manner, and, finally, the action of the cam 12 lifts the upper end of the jaw m, causing both jaws to move backwards about the pivot pins 3. The guide-block 28 has meanwhile been pressed down on the upper, the plunger is released, and a tack is driven. Immediately afterwards, the roller 22 passes over the end of the face of the cam v, allowing the latter to be returned to its initial position by the spring t.