Patent GB-191028407-A (GB)
Title: Improvements in or relating to Mechanism for Marking or Generating Patterns, particularly for use in Boot and Shoe Manufacture.
Inventor: BOULT ALFRED JULIUS
IPC: A43D8/06
Filed: 1910-12-06
Granted: 1912-01-08
Abstract: 28,407. Boult, A. J., [United Shoe Machinery Co.]. Dec. 6. Milling-machines. - A machine for cutting cams or patterns particularly for use in boot and shoe making machines of the type described in Specifications 28,922/09 and 13,301/10, [both in Class 17 (i), Boots, Apparatus for making &c.], is provided with a feed-wheel 26, Figs. 1 and 2, and a follower 17 for engaging concurrently two outlines of a model, which are in parallel planes, such as the sole and upper of a boot 19, the engaging means controlling a cutter 1 mounted on an arm 4 swinging about the shaft 5 in such a manner that a blank 16 is cut to an outline corresponding with the difference between the two outlines of the boot or model. The cutter is driven from the shaft 5 by a pulley 12 and belt 13, and the blank is driven from the same shaft by a worm gear 33, shaft 31, clutch 35, 52 and worm 36. The feed-wheel 26 is driven in fixed relation with the blank 16 by spur-wheels 41, 42 and 44. A spring plunger 21 normally presses the cutter 1 towards the blank 16 and the follower 17, towards the model 19. A dog 64 may be provided which, when turned into the horizontal position, holds the arm away from the blank. A similar dog 68 may be provided of such length that when it is in the horizontal position, the cutter only engages slightly the edge of the blank to trim the limb left between the ends of the active portion of the cam. The arm 4 may be moved out of engagement with the blank by a treadle mechanism 63, and a bellcrank lever 58 engaging a depending lug 61. The feed-wheel 26 is provided with a milled or serrated surface to feed positively the sole edge and has a guide flange 45 to position the sole properly with relation to the feed wheel. Marks 121, 122 on the follower 17 and leg 24, respectively, are provided, which, when in alinement, indicate that the sole edge is at the correct tangent to the feed-wheel. The cam or blank may be marked at certain positions to facilitate positioning in a boot-machine by a spring hammer 101 operated from a treadle 118, The hammer is pivoted at 103, Fig. 8, and is normally pressed downwards by a spring 109 acting against a lug 106. A spring pawl is pivoted to the back of the hammer, which is adapted to engage a notch 119 on a rotary shaft 115. When the treadle 118, Fig. 1, is depressed, the shaft 115 is rotated and the hammer is raised until the pawl slips from the notch and allows a blow to be struck. A spring 120 returns the shaft 115 to the normal position. In order to copy a cam 16 already cut, a fresh blank 25 may be clamped on top of the cam, and a roller 94 placed below the cutter 1 to engage the cam. In the modification, shown in Fig. 12, an edge device which is adapted to be traversed past the follower 17 is provided in place of the model shoe. This edge comprises a series of sliding blocks 220 arranged transversely to the bar 219. The bar is provided with a rack 218 engaged by the feeding-pinion 226. The feeding mechanism is cut out at the end of the travel by a stop 260 engaging a projection 259 on the rocking lever 255 and throwing out the clutch 256, 257. The blocks 220 may be set by measuring the width of the welt at any point and adjusting the corresponding block or by running the edge of the sole along the roughened surface 208. The blocks are held in adjusted position by a clamping-screw 210. The ' edge ' is mounted on a turntable, so that when swung out of engagement with the feeding- pinion 226, it may be pushed back by hand or returned by a spring. The adjustable blocks may be arranged radially on a disk.