Patent GB-462231-A (GB)
Title: Improvements in or relating to heel-seat fitting machines
IPC: A43D8/34
Filed: 1935-08-24
Abstract: 462,231. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation) Aug. 24, 1935, No. 23750. [Class 17 (i)] Heel seats, shaping.-Relates to machines of the kind described in Specification 430,758, and consists in detail improvements. The gauge for the heel end of the shoe is connected to the back gauge for the heel so that the insertion of the heel into its measuring device automatically adjusts the shoe gauge. Preferably, the shoe gauge is adjusted by a rotatable stop provided with a spiral face. A holddown is provided for the heel in its measuring device. The chip ejector is in the shape of a bar curved to enter the recess in the crease plate, and its operative movement is cushioned. The heel measuring device, Fig. 8, comprises a breast abutment 100 and a rear abutment 96 slidable towards and from the breast abutment. A hold-down comprises a rubber roll 248 on an arm urged downwardly by a spring 250, the rear end of the arm having teeth cooperating with a pawl 260 on a slide 256. The pawl is urged to operative position by a spring 258, and released, to allow the spring 250 to depress the hold-down, by a roll 264 carried by the slide and engaging the heel. The abutment 96 is pivoted to an arm 158, Fig. 3, moving with a gear sector 152 gearing with a pinion 150 rotating with a stop 92 shaped to an Archimedean spiral. A spring about the axis of the sector urges the abutment 96 towards the abutment 100. The surface of the stop 92 engages a layer of leather 144, Fig. 4, on a block 132 pivoted at 140 to the gauge 26 for the rear of the shoe, the block being thus able to swing to engage the stop at both ends. The block is shaped to have only line contact at the lowest portion of the spiral face and at the highest portion contact only at the ends of the stop engaging face, surface contact being made at the intermediate portion. This construction prevents the stop being rotated by pressure of the block. The block is restrained in its swing by a slot therein engaging a sleeve 136 on a pin screwed into the stop plate 108. A spring 130 urges the gauge 26 a short distance forward of the stop plate 108 as in the prior Specification. A centralizing slide 24 has inclined shoe engaging faces 112, and is urged forwardly by a spring 120. The chip ejector comprises a curved bar 184, Fig. 6, pivoted to a slide 186 so that it enters the recess in the crease-plate 20. Should change of plate be made, the bar is prevented from dropping by a spring stop 212. The slide is actuated by a lever 194, Fig. 1, normally urged to the inoperative position by a spring 202, but provided with an arm 204 co-operating with a hook 206 at the end of an arm having a cam surface 214 running over a roll 216. The arm is pivoted to the head 218 of a piston 220 urged into a cylinder 222 by a spring 234. As the cutter slide 78 advances to make the cut as described in the prior Specification, a flange 230 thereon engages the head 218 and advances the hook over the arm 204, air entering the cylinder 222 by a valve 242, a pivoted latch dropping behind the head to retain it in its outer position. On the lifting of the sole bulger by anti-clockwise movement of the levers 42, 38 as described in the prior Specification, an extension 46 of the link 44 connecting these levers engages the tail of the latch, freeing the piston. The spring 234 then actuates the chip ejector, its movement being cushioned by the air in the cylinder which escapes by an aperture 244. The cam surface 214 frees the hook 206 when the bar 184 has moved sufficiently, and the lever 194 and bar are returned by the spring 202. The indicators connected to the shoe gauge and heel gauge, described in the prior Specification, for ensuring the proper positioning of the shoe, are brought to the front of the machine, at 180, 182, Fig. 3. To prevent injury to the heel, the stop 92 and various other parts of the stop operating mechanism are made of aluminium, to lessen their inertia.