Patent GB-144780-A (GB)
Title: Improvements in or relating to machinery for operating upon boots or shoes
IPC: A43D111/00
Filed: 1919-03-13
Abstract: 144,780. British United Shoe Machinery Co., (United Shoe Machinery Corporation). March 13, 1919. Boot-sole sewing-machines; lasts, mounting; frames.-In a machine in which a lasted boot is presented automatically to a sewing-machine or other operating-tool, devices are provided for correcting the feed of the last-carrier and for relatively tilting the work and the operating-tool both transversely and longitudinally of the line of feed. The invention is described as applied to a machine for sewing the inseams of welts or turnshoes, and comprises two feelers 74 and 168 which engage the lip of the channel at its base. The. mounting and operation of the feeler 74 and the last-carrier 2 and the mechanism bv which the position of the carrier is controlled by the feeler is substantially the same as described in Specification 28794/13. The sewing mechanism, which may comprise devices as described in Specification 7407/11, is carried by a support 100 movable about its sewing point and a plane transverse to the line of feed on ways 114 formed on the end of a rotary carrier 116 mounted to turn about an axis passing through the sewing point and in a plane parallel to the line of feed. The vertical position of the feeler 74 determines the position of the carrier 116, and for this purpose an extension of the feeler is connected by a link 262 to one end of a bellcrank lever 264 carrying a roller 266 which coacts with the V-shaped cam on a plate 268 reciprocated once during each stitching cycle by a cam-lever 270. The lever 264 is locked at the proper time by means of a drum 204 on its pivoted and spring pressed wedging-rollers 206, and is released by horizontal arms 212 pressing the rollers apart. The arms are carried by connected bell-crank levers actuated by a cam lever 222. The movement of the plate 268 produced by contact with the roller 266 is communicated by a link and lever 272 to a disk 278 which is locked by a cam-actuated clamp 224 and communicates its movement through wires 280, 282 to a, slide 258 carrying a roller 248. The slide-bar is locked by a clamp 260 actuated by a cam on a rotary shaft which carries a sliding cam sleeve 250 comprising a central groove with oppositely-disposed cam faces. The consequent axial movement in either direction of the sleeve 250 is communicated through a lever 254 and link 256 to the link connecting two arms 246 on the pivots of two carriers 144 in which are mounted the axles of two rollers 140 engaging the surface of a continuously rotating roller 142. The axles of the rollers are thus inclined in one direction or the other to the axis of the roller, and the carriage 236 is moved to right or left until parallelism is restored between the axes of the rollers 140 and 142. This movement of the carriage is communicated by a link 240, bell-crank lever 242, and link 244 to the carrier 116. The second feeler 168 rides over the surface of the sole and the changes in its vertical position are communicated through the link 172 and a train of mechanism similar to that controlled by the feeler 74. The carriage 118 is connected to the support 100 through the link 120, lever 122, link 124, lever 126, slide 130, link 134, lever 132, and link 136. The invention is stated to be applicable to welt and turn shoe machines, outsole stitchers, rounding, and channelling machines.