Patent GB-195709-A (GB)
Title: Improvements in or relating to shoe bottom levelling machines
IPC: A43D35/00
Filed: 1921-12-28
Abstract: 195,709. British United Shoe Machinery Co., Ltd., Gouldbourn, J., and Woodcock, R. B. Dec. 28, 1921. Sole-levelling.-Relates to solelevelling machines of the type dascribed in Specifications 4091/01, 8880/08, 10678/09 and 104,728, and consists in means for automatically varying the duration of the relative traverse of the levelling roll and shoecarrying jack in accordance with variation in the areas of shoes bottoms operated on. Figs. 3 and 10 show a change-speed gear automatically set when the shoe is jacked to drive the cam shaft at a speed inversely proportional to the area of the shoe bottom. The heel post 164 is, as usual, adjusted towards or from the toe post 162, by a hand-wheel 168. The heel post carries a roll 280 engaging a slot 278 in a bell crank lever, the other arm 282 of which co-operates with a pin 284 on a longitudinal slidable rod 246 geared by a double segment 244, 240 to a second slidable rod 238. Longitudinal movement of this rod is arranged to adjust a variable speed gear driving the cam shaft by a gear wheel 24, Fig. 10, from a uniformly rotating shaft 196. On the shaft 196 are three eccentrics spaced 120‹ apart. On each eccentric ride two diametrically opposite rollers 198 connected to an arm 206 pivotally supported on a link 208 and transmitting only the horizontal component of their motion to a link 214 drivng a gear-wheel 224 through a free-wheel clutch. Movement of the rod 238 turns the rollers about the shaft 196 so that the horizontal component of their motion is increased or diminished, with the result that the cam shaft is driven at a slower speed for a longer shoe. A weight 288 keeps the pin 284 up to the lever arm. To prevent the pin interfering with the oscillation of the jack, the sleeve on which the lever 282 is carried is moved axially out of engagement with the pin when the machine starts. To prevent the rods 238, 246 then moving under the influence of the weight 288 the rod 246 is first gripped by apertured plates 250 normally skewed by springs but pressed into parallelism by a wedge when it is desired to jack a new shoe. Fig. 13 shows a jack mechanism of the type described in Specification 23628/13 modified to provide long and short traverses of definite ratio, which ratio can be set according to the style of the shoa but which remaiins unchanged by a change in the size of the shoe jacked. The heel post is pivoted at 303 to a toe post oscillated about a fixed pivot 302 by a worm 318 and segment. The worm is rotated by a shaft carrying a clutch member 334 rotated in opposite directions by clutch members 335, 336 and moved axially by a tappet 330 to reverse the drive. This tappet is operated by arms 314, 315, 316, the first being fixed to the toe post, and the second connected to the heel post by a chain 325, lever 321, and link 323, the lower pivot of which is eccentrically adjustable and the upper pivot adjustable by a slide 324. The third arm governs the short traverses from the toe to the shank and is adjustably linked to the lever 321. Its end has a pivoted stop so that it operates orly in one direction. A cam 346 moves the tappet 330 out of the path of the arm.316 when long traverses are to be made. The cam 346 is rotated by a rocking lever 343, the tipping of the levelling roll being governed by a cam 345 and the stoppage of the machine at the end of a cycle by a cam 348. Specifications 1269/07 and 13230/13 also are referred to.