Patent GB-190700582-A (GB)
Title: Improvements in or relating to Lasting and like Machines.
Filed: 1907-01-09
Granted: 1908-01-09
Abstract: 582. Bates, A., and British United Shoe Machinery Co. Jan. 9. Lasting.-In a hand-method lasting-machine of the type described in Specification No. 14,453, A.D. 1897, adjustable means is provided for stopping the machine with the grippers in various positions according to class of work operated on. Grippers 14, 16, Fig. 1, may be stopped in the positions shown by the full and dotted lines, which represent the throw of the grippers, and in intermediate positions, the grippers being operated by a cam 54 on a shaft D, which reciprocates a rod 50 connected to the grippers. The shaft D is rotated by a pulley O through an adjustable coupling, and a disengaging-mechanism is provided which stops the shaft D in the various positions desired. The pulley O is driven from a shaft provided with a clutch, which is operated by a treadle in the manner described in the above-mentioned Specification ; the treadle is preferably connected by a rod XX<7> to a brake XX<6>, and the rod is arranged to release the brake from the pulley and also to release the disengaging-mechanism of the coupling. As shown in Figs. 1 and 3, the coupling consists of a sleeve Q, which is frictionally connected to a collar D<1> fixed on the shaft D, the sleeve being forced against the collar D<1> by a liner Ox connected to the shaft by a screw D<3>. The sleeve Q and collar D may be connected by bolts which engage slots in the sleeve and collar, so that either method of connection permits the sleeve to be adjusted angularly, relatively to the collar D<1>. The sleeve Q is provided with a spring pressed clutch-bolt P, which engages one of a series of holes O<2> in a flange O<1> of the pulley U. The bolt P is freed from the flange O<1> at the desired time by a wedge N' on a lever N, which is connected by a rod L to the rod XX<7>, the lever N being provided with a roller N<6>, Fig. 7, which engages a cam Q<1> on the sleeve Q and allows the lever N to be moved by a spring, so as to force the wedge N' against a pin P<4> on the bolt P, and to release the pin from the flange O<1>. The pin P<4> is then held by a projection N<2> on the wedge N', and also by a spring-controlled catch N<3>, so as to ensure that the shaft D comes to rest in the desired position. At the same instant that the shaft D is stopped, the depression of the lever N raises the rod XX<7> and forces the spring-controlled brake XX<6> into contact with the pulley 0. As the cam Q<1> is on the adjustable sleeve Q, the time at which the shaft D is brought to rest is also adjustable. In the form shown in Fig. 7, the sleeve Q is dispensed with, and the lever N turns on a pin M', which can be adjustably secured in a slot M' concentric with the shaft D. A cam.surface is formed on the collar D', and the lever N is adjustably connected to the rod XX<7> to allow for its adjustment relatively to the shaft D. The raising of the rod XX<7> also throws the clutch of the main driving-shaft out of operation. On a further depression of the treadle, the clutch P is released, and the brake XX<6> is freed so that the shaft D is again operated.