Patent GB-190917939-A (GB)
Title: Improvements in Sole-levelling Machines to be used in the Manufacture of Boots and Shoes.
Inventor: DENNE MARK THOMAS
IPC: A43D89/00
Filed: 1909-08-03
Granted: 1910-10-03
Abstract: 17,939. Denne, M. T. Aug. 3. Sole-levelling.-A solelevelling machine is constructed with a single levelling-roller operated by automatic means, other than pattern cams, which are under the control of the operator, and may be adjusted in the following ways :-(1) To determine whether and when the roller shall tilt when levelling a sole during the ensuing operation of the machine ; (2) to cause the roller to move in one plane while operating on the fore part of a sole and, while levelling the waist portion, to tilt either, (a) to one side only, or (b) to each side successively, or (c) not to tilt at all ; (3) to effect a tilt to one side while levelling the waist of one boot and to the other side while operating upon the waist of the succeeding boot. The boot is stationary during the levelling operation, and the levelling- roll e is mounted upon a trunk to which is imparted a bodily movement forwards and backwards to carry the roller over the sole, and a vibratory movement in the same direction. The bodily movement of the trunk is imparted by a carriage upon which it is mounted. The levelling- roller 40, Fig. 4, is journaled in a pin in a yoke 42 carried at the end of a rod 43 pivoted to the trunk 48 at 44. A block on the rod 43 working between cheeks 47 on the trunk takes the side thrusts upon the roller 40. The levelling - roller is pressed upon the work by an adjustable spring 51. The cylindrical trunk is journaled in bearings 49 on a carriage 50 so that it may slide therein and turn upon the carriage. The trunk is vibrated by a crank-pin 64 on a shaft 55 journaled in . the carriage 50 and constantly rotated by a shaft 58, upon which the driving-pulley 61 is aplined to admit the bodily movement of the carriage and its connected parts. The crank - pin 64 works between segmental flanges on the trunk, so that this may be continuously vibrated in all the inclined positions of the roller. To tilt the roller, a loingitudinal cylindrical recess is formed eccentrically in the rear of the trunk 48, and a cylindrical pin 79, Fig.7,engaged by a crankpin 78 on a shaft 77 journaled in the carriage 50, is loosely mounted in this recess so that it may turn and slide therein and also slide upon the crank-pin 78. A special clutch mechanism is provided between the constantlyrunning shaft 55 and the shaft 77, to operate automatically and to control the tilting of the roller. A dog d, Fig. 12, co-operates with stops 130, 131 upon a rod 124, mounted for adjustment longitudinally of the machine frame. The stop 131 is fixed to the rod 124, and comes into action when the roller reaches the limit of its outward movement. The stop 130 may be adjusted, according to the position of the waist line, to act when the roller reaches the commencement of the waist. The dog d is shown as a projection 98, Fig. 8, upon a lever 99, which operates the movable member of the clutch through the medium of a spring pawl carried in a pivoted member 94. This pawl engages one of four studs 92 projecting from a loose ring 91 mounted upon a disk 80 keyed to the shaft 77 and forming the driven member of the clutch. The ring 91 and the disk 80 are connected by a spring, and the actuation of the projection 98 tends to turn the ring 91 upon the disk 80. A worm 90, Fig. 7, is constantly driven from a worm 70 on the shaft t 55 and forms.part of a disk 87, having recesses 86 formed in its upper face. The worm 90 is loose upon the shaft 77 and, with its connected disk, forms the driving-member of the clutch. Four recesses 85 are formed upon the underside of the carriage 50. A lever 82, Fig. 8, carrying rollers 84 is pivoted in a recess in the disk 80. The extreme combined width of these rollers exceeds the thickness of the disk 80, and the studs upon which the rollers are mounted project into inclined slots in the loose ring 91. Normally, the upper roller is in engagement with one of the recesses 85 in the carriage 50. Movement of the ring 91 relative to the disk 87, which is effected by actuating the pawl member 94, projects the lower roller into one of the recesses 86 on the disk 87, and the disk 80 with the shaft 77 is caused to'turn wit h the worm 90 The spring between the disks 80 and the ring 91 tends always to throw the lever 82 upwards, and as soon as a quarter of a revolution has been accomplished, the shaft 77 is again locked. Movement of the shaft 77 causes the levelling-roller to be tilted, and by succeeding movements of a quarter of a revolution the roller is tilted (1) to one side, (2) back to the original position, (3) to the other side, and (4) back to the original position. To prevent the actuation of the tilting-mechanism when the stop 130, Fig. 12, meets the abutment d at the end of the inward movement of the carriage, this stop is pivotally mounted so that it may swing back. The machine thus set will operate to tilt the roller to one side when the roller reaches the waist line on its outward movement. At the end of this stroke, it is tilted back to the horizontal position, which it retains during the inward movement, after which the machine comes to rest. On the next operation of the machine, the cycle is repeated, except that the roller is tilted in the opposite direction. To effect a tilt to one side on the outward movement and to the other side on the inward movement during one cycle, a screw 103 is provided for closing up the recess reached by the moving member of the clutch after its second actuation. The crank is thus moved through half a revolution on its second movement, and the roller is tilted completely from one side to the other at the end of the outward stroke. The stop 130 must in this case be operative on the inward movement, and is rendered so by the insertion of a pin therein to prevent it from swinging upon its pivot. To prevent any tilting of the roller, the pawl member 94, Fig. 8, may be thrown out of gear by an arm 102 actuated by a treadle or hand-lever. The same lever may be actuated to effect a reversal of the tilt of the roller when necessary. The outward and inward movements of the carriage 50 are effected by two laterally-sliding pinions 73, which are continuously engaged with a fixed rack 74 and alternately clutched to oppositely-rotating wormwheels driven by the worm 70. The movement of the pinions is effected by a switch-lever 75 engaging the bosses of the pinions 73. This switchlever is rocked to clutch either pinion to its worm-wheel by means of a projection 76 adapted to come into contact with stops 120, 123<a> on the rod 124. The forward stop 123<a>, Fig. 12, is fixed relatively to the rod ; the stop 120 controlling the rearmost position of the carriage 50 is pivoted upon a bracket fixed to the machine frame. Normally, the projection 76, shown at c in Fig. 12, is held by means of a spring catch 123, against which it is pressed by the spring actuated stop 120 in such a position that both pinions 73 are out of action. To start the machine, the catch 123 is removed by a treadle, and the spring stop 120 throws the lever to couple the foremost pinion to run the carriage forward. The projection c is thrown back to reverse the motion at the forward limit of travel by the stop 123<a>. This limit is rendered adjustable by moving the rod 124, such adjustment simultaneously adjusting the position of the forward tilt-controlling stop 131. This movement is effected by a hand-wheel 127, a pointer indicating the adjustment, which corresponds to the size of the boot, upon a scale plate 128. The machine is provided with a number of equidistant last-supports radially adjustable for size upon a rotary table 1, Fig. 1. The table carries corresponding toe-rests 28 and guards 31, and each last-pin is carried upon a vertically adjustable post 16 arranged upon a carriage 10 sliding radially upon a second radially sliding carriage 6. The position of the last-pin with respect to a heel clamp to be described may be adjusted by a handlever 11, which operates a pinion in gear with a rack upon the carriage 6. The carriage 6 is adjusted radially by a hand-operated screw 7 and hand-wheel 9. To clamp the last upon the pin 14 without damage, the pin is spring-controlled upon an horizontal radially-arranged pivot, and heelclamping jaws 18 geared together and carrying a chain 19 are forced against the heel by means of a worm 23, which actuates a lever 21 carrying them. The lever 21 is adjustably secured to the carriage. The worm 23 is splined to a shaft 24 which carries a gear 25. A treadle 27 is so disposed as to actuate an eccentrically-arranged rack-rod 26, the weight of which normally causes the heel jaws to clamp the last. To unclamp the heel, each heel clamp may be operated in turn as its rack-rod comes into line with the treadle. The table is automatically turned to place a jacked boot in position for levelling, and to remove simultaneously a levelled boot after operation. A pulley 141, Fig. 14, is constantly driven by suitable means, and drives one member 139 of a friction coupling, adjacent to which is a sleeve 142 loose on the driving-shaft. The other member 138 of this coupling is connected to a bevel-wheel 136 arranged to turn the table. To effect movement of the table, a treadle &c. coupled to a chain 146 pulls down a shaft 143, which carries a hook 145<a> engaged with a projection 145 on the table, of which one is provided for each jack. A spring surrounding the bolt turns it as soon as it is free of the projection 145, and gear teeth on the bolt which are in engagement with a rack upon the sleeve 142 force the clutch parts together. The table then rotates until the next stop contacts with the hook at the head of the shaft, which has a cam-shaped end to uncouple the clutch.