Patent GB-238915-A (GB)
Title: A machine for operating on the heel ends of shoes and the like
IPC: A43D8/34
Filed: 1924-03-28
Abstract: 238,915. Haworth, J. T., and British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). March 28, 1924. Trimmings.-Machines for bevelling a sole margin at the rear end to prepare it for the reception of a heel comprise a work positioning device, sole margin bevelling means, and guiding means for securing that movement between the bevelling means and the work shall occur in a determinate curved path for causing progressively the desired marginal bevelling of the sole. Two machines are described, one comprising a last pin 42, Figs. 1 and 8, slidably adjustable laterally on a support 40 itself slidable vertically in a block 46 pivotally mounted on trunnions. A spring 56 depresses the support and a spring 54 tilts it forwardly for insertion and removal of work. When the shoe has been positioned, the rear end of the sole is supported by crease plates 62, Fig. 3, slidable on are-shaped guides to pivot about a point 64 at the rear of the heel. These plates are actuated by push rods 70 pivoted to a link 74 one end of which is fixed and the other end actuated by a slot 82 in a slide moved laterally by connections from a handle 94, Fig. 1, locked in operative position by a pawl and ratchet 98. The cutting mechanism is mounted on a table 106 which is slid rearwardly to allow the work to be positioned, and then slid forwardly to operative position, by a handle 108. This handle also operates a lever 50, Fig. 8, which resiliently forces the last-support upwards when the work has been positioned and clamped. The table 106 carries an electric motor 136 on the armature shaft of which is a rotary bevelling cutter. The shaft is surrounded by a sleeve 124, Fig. 4, maintained perpendicular to the work by a disc extension slidable between superposed plates forming part of the table. The sleeve 124 is guided in an adjustable horse-shoe shaped slot 166 formed by overlapping plates 160, 162 pivoted at 164 and provided with a widened portion 169 for accommodating the sleeve before cutting is commenced. Handles 146, 148, Fig. 1, are actuated by the operator to cause the cutter to hug the inside of the horse-shoe slot to bevel the heel seat margin. An automatic switch cuts off current when the table is in the rear position. To adjust the machine for size and style of heel, a size dial 260, Fig. 6, and a style. dial 266 are provided. The size dial is secured to a screwthreaded shaft 280 engaging an internally and externally threaded sleeve 330 secured to the style dial, the sleeve 330 engaging an internal thread in a. sleeve 178 on a member 176 slidable forwardly and rearwardly of the machine and carrying a stop bar 210, Fig. 1, limiting the forward travel of the sleeve 124, and, therefore, of the cutter. The end of the shaft 280, Fig. 6, is connected by bevel gears with a cam groove 288 in which is a roller 290, Fig. 4, secured to a member 300 mounted on parallel links of bell crank levers 294, 296. A slot in the member 300 engages a roller 304 on a bell-crank lever 306 adjustably operating a lever 312 on which are pins 316 engaging slots 322 in the plates 160, 162. A modified machine comprises a rotary cutter for trimming the rear of the heel seat and two others for the two s.ides. The shoe is supported on a last pin 86<*>, Fig. 10, and an adjustable toe rest 92<*>. Crease-engaging plates 72<*>, 74<*>, 76<*> are moved radially b levers 102<*> engaging slots 96<*> in a plate 93<*> turned by a 'handle 94<*>. Cam plates 132<*> on the forward crease plates engage rollers on members 34<*> pivoted at 36<*> and supporting the front ends of cutter carrying shafts 28<*>. The rear cutter 52<*> is carried by a yoke 40<*> operated by a handle 46<*> to swing the cutter about the rear end of the heel seat. The head 144<*> of the yoke is connected by links 154* with the members 34<*> so that when the side cutters are in action the rear cutter is raised, and when the rear cutter is in action the side cutters are retracted. The work support is moved rearwardly, to cause the side cutters to bevel the sides of the heel seat, by a handle 60<*>, Fig. 9, secured to a segment gearing with a rack on the work support. The rear limit of this movement is determined by stops 120<*> abutting against a stop plate 116<*> which has been previously adjusted to the heel 112<*>. The cutters are driven by belts. According to the earlier Provisional Specification, the machine may be completely automatic. According to the later Provisional Specification, the first machine is modified in that a canting clutch plate holds the shoe support in raised position, the cutter is driven by a flexible shaft, and the lever 312 is operated directly by a handle. Specifications 145,847 and 185,739 are referred to.