Patent GB-343976-A (GB)
Title: Improvements in or relating to methods or means suitable for use in the grooving or channelling of heels
IPC: A43D87/00
Filed: 1929-11-27
Abstract: 343,976. Wooden heels. BRITISH UNITED SHOE MACHINERY CO., Ltd., Union Works, Belgrave Road, Leicester.- (United Shoe Machinery Corporation; 205, Lincoln Street, Boston, U.S.A.) Nov. 27, 1929, No. 36293. [Classes 145 (i) and 145 (ii).] Circular-saw machines.-A machine for forming heel cover margin receiving grooves in heel breasts comprises positioning means for the workpiece during relative grooving-traverse of grooving means and the workpiece. Figs. 1 and 2 show a machine suitable for forming a groove along the height-wise median line of the breast or a pair of grooves slightly displaced from and parallel to this line. A driven circular saw 10 projects through a groove in a table 12 pivoted at 24 at one end and supported at the other by a post 28 adjustable in height. A work carriage 14 is guided parallel to the saw by a dovetail 32 engaging a groove in the table, and traversed by a handle 36, through a distance limited by stops 40, 42. The carriage has a heel receiving pocket 44 with a base inclined downwardly towards the rear of the machine and terminating in a shoulder 16. A work centring device has fingers 68 engaging the side edges of the heel seat and integral with an arm 18 pivoted at 52 to the carriage, the fingers being normally urged toward the work by a spring 58. The heel is held by the operator during the grooving, a pivoted guard 74 being interposed between the operator's hand and the saw. When it is desired to form parallel grooves one on each side of the median line of the breast, the arm 18 is clamped by a nut 53 in a rearward position, and each finger 68 used in turn as a fixed positioning gauge for the adjacent side of the heel. A modified machine for forming a groove on each side of the breast of a Cuban heel near its edge comprises duplicate grooving and gauge members in staggered relation to a table 130, Fig. 10, over which the heel is slid. Each of the grooving members comprises a saw 120, Fig. 9, adjustable by axial shift of a collar 202 and its driving pulley 144, which latter is secured to the shaft of the saw by a set-screw co-operating with an elongated flat on the shaft. Above the saw shaft is a turret head carrying a number of gauges 122 differently curved to match heels of different styles. The selected gauge is held in operative position adjacent to the saw by a spring dowel pin 160, the turret being raised by a spring 180 when it is desired to change the gauge, and depressed after appropriate rotation by a handle 192 actuating a cam 190. In operation, the heel is slid over the table in contact with the gauge and saw of the two grooving and gauge members in succession, the travel of the heel being continuous and in an almost straight line. In a modification, to cut grooves at an angle to the breast surface, the table 206, Fig. 12, is split and the two halves pivoted and geared together, the angle being adjustable by a worm 218. The gauge 210 is then grooved to give clearance to the cutter shaft. A machine adapted to groove the side edges of the breasts of Louis heels comprises a driven saw 220, Fig. 17, co-operating with an adjustable gauge 230 for the breast and an adjustable gauge 232 for the side surface. The side gauge is in the form of a flexible strip restrained by pins carrying collars above and below the strip and secured to a U-member 314, Fig. 16, adjustable to vary the curvature of the strip by a screw 324 and thumb-nut. This machine is in duplicate, for the two sides of the breast, and is equipped with suction dust collectors and a rotary brush for clearing out the grooves. For chamfering the breast adjacent to the upper portion of the groove on its inner side, to allow the breast flap to lie evenly at this portion, the machine is provided with chamfering cutters 246, Fig. 22, one for each side, and cooperating gauge members 382, 368, engaging the breast, and 366 engaging the side of the previously formed groove. The gauge 382 is adjustable vertically by a thumb-nut 336. Fig. 21, horizontally in the plane of the saw by a clamping screw 400, and axially of the saw by a clamping screw 410. The gauge 366 is pivoted at 370 and adjustable about this pivot by a clamping screw 374. The gauges are carried by a collar 356, which can be removed for the changing of the cutter. An annular channel 428 in the collar engages a nut 426 on a threaded stem carried by the collar and abutting against an end face on the bearing casing. This mechanism facilitatesre placement of the collar in adjusted position after cutter changing.