Patent GB-191120789-A (GB)
Title: Improvements in or relating to Lasting or like Machines.
IPC: A43D43/06
Filed: 1911-09-20
Granted: 1912-09-19
Abstract: 20,789. British United Shoe Machinery Co., [United Shoe Machinery Co.]. Sept. 20 [Addation to 22,839/08.] Lasting.-A machine of the type described in the parent Specification, for completing the lasting of that portion of a lasted and welted shoe that lies between the foremost heel tack and the end of the inseam, is provided with improved means for engaging the shoe and presenting it to the tacking-mechanism. The shoe-engaging devices comprise V-shaped clamps 74, Fig. 2, universally connected to the front ends of spring-pressed links 54, which are fulcrumed on bosses 50 of a carrier 42, Figs. 1 and 2, and are engaged by pins projecting from blocks 58 mounted on a right and left threaded screw 60; this screw is journaled in a boss 52 of the carrier 42, and is adapted to be rotated through gears 62, 64 by means of a hand-wheel 66. The boss 52 also serves as a support for a freely-movable spring-pressed back-rest 70. The carrier 42 is pivoted on a bolt 40 carried by a slider 36, which is mounted in a bracket 34 and is adjustably connected to the treadle mechanism; the amount of movement of the carrier 42 about the bolt 40 is limited by the engagement with a tongue 44 inserted in a slot in the bolt of studs 46 adjustably threaded through ribs 45 of the carrier. To provide for slight movement of the shoe, a jack-pin 89, Fig. 3, is pivoted in the forked end of a jack-post 90, and is normally held upright by a spring-pressed pin 94; the jack-post is adjustably mounted in a sleeve 96, which is pivoted at 98 to the carrier 42. In the use of the machine, the jacked shoe is positioned at the proper height, and the handwheel 66 is then rotated to move the clamps 74 into operation. These clamps are held by springs 82 in such a position that their padded lower ends first engage the side of the shoe and press the material inward, after which projecting lips 88 at their upper ends engage the upper beneath the welt and tighten it into position to be tacked. The carrier 42 is then rocked to one side until one of the studs 46 engages the tongue 44, and the treadle is then depressed and a tack driven. The carrier is then swung over as far as the other stud permits, and the treadle again depressed to drive a tack through the upper &c. at the opposite side of the shoe. A modified construction of the machine is shown in Figs. 4 and 5, in which the shoe is mounted on an adjustable jack-post 150 supported by a spring 154 in a socket block 152, which is pivoted at 157 to a lever 26 of the treadle mechanism; a bracket 156 limits the amount of movement of the jack about the pivot 157. The clamping-mechanism is carried by geared arms 162, 163 pivoted to a block 171 and adapted to be operated simultaneously by a hand-lever 174. It comprises spring fingers 160 covered with non-abrasive material, rigid lips 164 to clamp the upper to the last, and adjustable stops 168, which are adapted to engage the presser-foot of the machine to limit the amount of lateral movement of the shoe in presenting its sides successively to the tacker; the upper edges of the lips 164 may be shaped to enter the welt crease. A height gauge 190 for the shoe is attached to the arms 162, 163, which are locked in their adjusted position by a plate 176 and a spring-pressed latch 184; the latch is furnished with a thumb-piece 188 located adjacent to the handle 174. To provide for lateral adjustment of the clamping-mechanism as a whole, the block 171 is formed with a T-shaped curved tongue which engages a corresponding groove in a plate 200 attached to the standard of the machine; the block is normally held in a central position by springs 202 attached to pins 204, which serve as a hinge for the plate 200 as the jack is raised towards the tacker.