Patent GB-396086-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D13/00
Filed: 1931-12-31
Abstract: 396,086. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. and ROBERTS, W. T. B., Union Works, Belgrave Road, Leicester. Dec. 31,1931, No. 36040. [Class 17 (i).] Lasting and pulling - over.- Relates to shoe upper conforming machines with forward and reverse driving means, and consists in improved gearing providing a direct drive for normal use and an indirect drive for reverse, the main driving pulley rotating continuously in the same direction. The mechanism is intended particularly for pulling- over machines wherein the machine comes to rest when the pulling- over is complete but before tacking, so that should the pulling-over be faulty, the machine can be reversed to starting position and the operation performed a second time. A driving pulley 21 is rotatable about a bush 25 carrying a gear wheel 39 and keyed to a disc 41 formed with frusto-conical clutch surfaces engaging either a fixed brake surface 47 or a surface 45 on the driving pulley. To the pulley is secured a gear wheel 27 and the wheels 27, 39 mesh with unequal pinions 29, 37 rotating together in a cage 33 having a clutch surface 73 co-operating with another secured to the driving shaft 5 of the machine. Normally, the disc 41 rotates with the pulley, but on a treadle rod 65 being pulled, a lever 57 moves the disc to the left and stops its rotation, the epicyclic gearing 27, 29, 37, 39 then driving the machine backwards. In a modification, the driving pulley has a V groove 156. A curved arm 161 pivoted at 159 carries at its free end a sleeve on which is mounted an arm 165 and a rod forming a bearing for a wheel 169 shaped at its periphery to engage the groove 156. Fixed to this wheel is a pinion 173 gearing with a pinion 175 rotating in a bearing at the end of the arm 165 and adapted to drive a wheel 179 on the main shaft 5. The arm 161 carries a spring plunger 183 engaging the arm 165 to allow this to yield on the two spur wheels being brought together. The arm 161 is raised and lowered by a slide 191 actuating toggle links 203, 205, the lower of which is resiliently supported, the slide being actuated by a reverse treadle 215. An extension on the reverse treadle carries a stop 219 adapted to engage the starting treadle to release the usual clutch throw out device 76. To prevent the clutch being engaged by the depression of the treadle, a link 221 connects the reverse treadle with a lever 223 formed with a cam portion 227 co-operating with a rod on a lever having a bevelled portion 233, adapted, on depression of the reverse treadle, to move into the path of a lug on the trip rod 237. To cause the machine to stop when the parts reach starting position, a cam 253 on the main shaft 7 actuates a push rod 249 to raise the reverse treadle at this point in the cycle. This cam also prevents the machine being started in reverse. The throw out device 76 operates at this time to bring the machine to rest. A pivoted handlever 260 may be swung clockwise to lock the rod 237 while adjustments are made. The reverse treadle may carry an upstanding arm co-operating with a cam to prevent the treadle being depressed except when pulling-over is complete, the cam being connected with the main shaft by a spring to allow reverse motion without raising the trealde. Another arm on the treadle may prevent reverse motion of the tack pot to cause delivery of a second supply of tacks. As applied to the machine described in Specification 7005/00, [Class 17, Boots &c.], a stop device can be connected to the treadle to prevent reverse movement of the tack separator. Specifications 16398/15, 150,424, [both in Class 17 (i), Boots and shoes, Apparatus for making &c.], and 373,183 are referred to.