Patent GB-120231-A (GB)
Title: Improvements in or relating to the Breasting of Heels.
IPC: A43D87/00
Filed: 1917-09-29
Abstract: 120,231. British United Shoe Machinery Co., (United Shoe Machinery Co.). Sept. 29, 1917. Breasting.-A machine for breasting heels before attachment is provided with means for advancing a heel a short distance after the first cut so that a second operation of the breasting knife will rernove a thin chip and produce a smooth breast requiring little or no finishing. The heels are dropped into a magazine comprising adjustable flare-ended corner pieces 32, Figs. 1 and 3, which guide the front corners of the heels, and adjustable guides 34 for the rear curved portions, the magazine being secured to a bracket 30 supported on a post 18. The heels rest on a feeder plate 52 adapted to be reciprocated upon a cutting-block 12 carried by a table 10, which may be tilted by means of a bolt and slot connexion 20, 22 about a pivot 14 on a support 16 firmly upheld by the post 18. The plate 52 is formed with a V-shaped notch to centre the curved rear portion of the heel, while the forepart is centred by two fingers 54 controlled by intermeshing segments 58, 60 and a spring 62. During breasting, the heel is held by a clamp 88 secured to the cylindrical lower end of a rod 79, the upper end of which is flattened and slides between friction blocks 82 mounted on a knife-carrier 4. This allows the clamp and knife to move together until the clamp engages the heel, and then the rod 79 slips during the breasting- operation; as soon as the knife begins to rise, the clamp is removed from the heel. The feed-plate 52 is actuated by a Y-shaped arm 96 connected to the plate by links 100 and pivoted at its lower end on a shaft 98, which is journalled in projections extending from the support 16 and the bracket 30; a spring holds the shaft frictionally against undesired movement. The shaft carries loosely an arm 106 in which is journaled a stud 108; an adjustable spring-surrounded screw 110 is threaded through this stud and carries a collar 112 which abuts against a lateral projection on an arm 114 forming part of the arm 96. The outer end of the arm 106 is forked and carries a pin 122 lying in a slot 124 in a link 126, which is pivoted at 128 to the knife-carrying slide 4. A short arm 144 extends from the link 126 and carries two pins 142 between which is located the upper end of a spring 140, the lower end of the spring being rigidly fixed to one arm 146 of an angle-lever pivoted at 148 to the slide 4. The other arm 150 of the angle-lever is forked to form arms 151, 152, which are recessed at 153 and between which is mounted a roll 154 carried eccentrically on a disk 156 pivoted centrally on the slide 4. The disk has two diametrically opposite ratchet teeth 157 adapted to be engaged by a spring pawl 160 carried by a toothed segment 158, which is mounted loosely on the same pivot as the disk and gears with a fixed rack 104. In operation, with the roll 154 engaging the arm 151 and the spring 140 bent to force the link 126 to the left, Fig. 1, a shoulder 130 in the slot 124, on the descent of the slide 4, engages the pin 122, and the arm 96 is swung to move the feed-plate 52 outwards so that a heel will drop in front of it. During the descent of the slide, the disk 156 is rotated so that the roll 154 engages the other arm 152, and the spring 140 is oppositely bent so that it tends to swing the link 126 outwards and upwards. As the slide 4 rises, a corner 132 of the slot 124 engages the roll 122 and a heel is fed under the knife. During the next downward movement of the slide 4, the heel will be breasted, the link 126 making an idle movement owing to the roll 122 lying in the long part of the slot 124. The spring 140 will, however, be shifted again to swing the link 126 downwards and inwards, so that, when the slide 4, on its return, approaches the upper limit of its movement, an adjustable screw 134 engages the roll 122 and moves the arm 96 to feed the heel forwards through a slight amount for a finishing cut on the next descent of the knife. The breasted heels are pushed from the machine into a shoot 170, while the chips fall into a shoot 172. In a modified construction of machine, Figs. 7 and 8, for breasting heels with their tread faces uppermost, the cutting block 12<1> is given a convex cutting face substantially cylindrical in transverse curvature so as to accommodate heels of substantially all widths; the feedplate 52<1> may be concaved to fit the upper surface of the block. The bolt and slot connexion 20, 22 between the table 10 and support 16 enables the block to be adjusted so that the heel will be breasted at the correct angle, a pointer 178 and scale being provided to assist in the adjustment. To prevent the heel from rising from the block, adjustable angle-shaped guides 180 are pivoted to the corner pieces 32 of the magazine. In this machine, a flat breasting-knife 6<1> is used, and to stiffen it against undue' flexing, members 186 adjust ably secured to the knife carrier 7 are provided to engage the marginal portions of the knife on the side away from the heel; the ends of the members are provided also with lips 187 to engage opposite edge faces of the knife. The shoot 170<1> is furnished with a slotted bottom to enable scraps which become detached from the heels to drop through.