Patent GB-321635-A (GB)
Title: Improvements in or relating to heel-seat fitting machines
IPC: A43D8/34
Filed: 1928-07-12
Abstract: 321,635. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). July 12, 1928. Heel seats, shaping by cutting.-A heel seat fitting machine is provided with alternative cutting means adapted, respectively, to form (1) the abrupt shoulders at the sides of the sole complementary to the breast of a Cuban heel, and (2) a bevelled flap for overlying the lip of a Louis heel. The shoulder forming cutter is rotary, and of double conical shape, with cutting edges on both conical surfaces. In its passage across the sole, it is moved heightwise and also longitudinally of the sole so that the shoulders formed are deepest at the sides of the sole, taper towards the median line, and terminate before it. The machine is substantially as described with reference to Figs. 1 to 8 of Specification 238,915, modified as described in Specifications 238,499 and 276,394. The shaft 50, Fig. 4, of the tongueing cutter is supported by a collar 57 above a sleeve 54 rigid with a circular plate 55 working between the upper and lower plates of a table 53 moved forwardly and rearwardly, to operative and inoperative position, respectively, by a lever 58, Fig. 6, substantially as described in Specification 238,915, The crease-plate-operating lever 66, Fig. 4, controls the crease plates and the templet for the cutter 52, the adjusting lever 80, for 'the templet carrying an arm 86, Fig. 6, urged by a spring 84 against an arm projecting upwardly from the crease-plate adjusting lever 72. A shoe gauge comprises a back member 152, Figs. 4 and 13, adjustable forwardly and rearwardly. and a centering member 160 slidable longitudinally of the shoe but urged forwardly by a spring 164. The work support is moved into and out of operative position by an arm 170, Fig. 4, rigid with the crease-plate lever 66. The arm is connected by a spring 184, and also by a link 176 with lost motion slots, to duplicate cam members 180 engaging rolls on the telescopic post, 30 of the work support. The cams are retained in operative position by pawls 192. freed when the lever 66 is raised by arms engaged by the end of the link 176. For cutting the bevelled flap for overlying the lip of a Louis heel, the machine has a knife 214, Fig. 6, at the end of a transversely slidable bar 212 guided in a carriage 210 adjustable forwardly and rearwardly, all as described in the prior Specifications. To enable the machine to form abutments for Cuban heels, the carriage 210 is provided with a transversely extending bar 224 guiding a carriage 226 slidable widthwise of the sole. The carriage 226 guides a forwardly and rearwardly slidable member 227 formed with a bearing 228, Fig. 10, for a sleeve 229 above which is a collar 230 clamped to a bearing member 234 for a cutter shaft 240 at the end of which is a rotary cutter 242 in the form of two cones placed base to base and provided with two series of inclined cutting edges lying' substantially in the surfaces of the cones. This cutter is driven by helical gearing and a telescopic shaft 272, Fig. 4, from an electris motor. To cause the cutter to follow the transverse curvature of the breast of a Cuban heel, the slide 227 carries a cam roll engaging a groove on the under side of the guide bar 224. In order that the heel-breast-receiving abutments shall extend through the whole thickness of the sole at its edges, diminish towards the median line and terminate before that line is reached, the bar 224 is formed with a second cam groove engaging a roll 312, Fig. 7, on a rack bar engaging a gear segment carrying arms 302 pivoted to the collar 230. This cam groove is adjustable for width of sole, a knurled head turning a right- and left-hand screw 323, Fig. 6, to move the end portions of the cam surfaces towards or away from each other. A scale is provided for facilitating this adjustment. In operation, the cutter 242 is inclined to its path of movement, the inclination being reversed for the two sides of the sole by a rack bar 339, Fig. 10, reciprocated by a cam roll 336 engaging a groove in the bar 224, the rack gearing with elongated teeth formed on the member 234. To hold the cutter shaft without back lash in operative position, a finger 350 is formed with a pair of holes arranged to receive the rounded upper end of a pin 356 carried by the slide 227, one hole or the other engaging over the pin as the cutter is lowered during its traverse. The sleeve 2'29 is adjustable vertically by a screw 355. A hold-down 360, Fig. 7, resiliently engages the sole just ahead of the cutter 242. The cutter 52 is also provided with a holddown in the form of a truncated cone 370, Fig. 4, surrounding the cutter and urged downwardly by a spring. The heel seat length-adjusting carriage is set by dials 384, 388, Fig. 6, connected to the mechanism described in Specification 238,915. ' To enable, a Cuban heel to be used to set the carriage for the shouldering cut, the heel is placed on a table 400 carrying a breast gauge 402 and the heel moved rearwardly by rotation of the dial 388 until it touches a fixed rear gauge 404. A plate 410 is adjustably carried by the bar 224 to limit the forward movement of the cutter 52. The cutter 242 is traversed across the sole by a horizontally sliding rack bar with inclined teeth gearing with a vertically sliding rack bar 426 linked to a hand-lever 430.