Patent GB-190804229-A (GB)
Title: Improvements in or relating to Machines for Operating on the Bottoms of Boots and Shoes.
Inventor: JUSTICE PHILIP MIDDLETON
Filed: 1908-02-25
Granted: 1909-05-25
Abstract: 4229. Justice, P. M., [Manufacturers' Machine Co.]. Feb. 25. Heels; nailing.-Relates to machines for operating on the bottoms of boots and shoes, and more particularly to heeling-machines, and heel-breasting machines of the type described in Specification No. 197, A.D. 1907. As applied to a heel-breasting machine, it consists of improved gauging-means for positioning the shoe laterally with respect to the breasting knife ; improved means for adjusting the breasting-stop ; an improved jack-support ; and means for removing from the heels the chips formed in the breasting operation. The jacksupport consists of two scissors members 37, Fig. 5, mounted on a pin 36 carried in gimbals 35, which are journaled in the arms 33 of a jack standard 32. The shorter arms of these members are connected by a spring, and are adapted to be forced open to expand the jack by a roller 38 carried by a spring plunger 40, Fig. 2. The standard 32 is seated in the upper end of a work-post A, which is pivoted at 30 to be movable into and out of operative position. When moved beneath the breasting- knife, a link 46 actuates the plunger 40, causing the jack members 37 to open automatically and to clamp the work, which is positioned on plates 39 pivotally carried at the upper ends of the members. The inclination to the horizontal of the tread face of the heel may be adjusted by movement of the jack-support about its gimbal trunnions, the support being secured in its adjusted position by a clamping-device 52, Fig. 1. In a modified arrangement, the head of the jack-support is furnished with a jack-pin, so that shoes may be breasted while still on their wooden lasts. After the shoe has been jacked, the work-post is moved rearwards until the heel is beneath a presser-foot B, Figs. 1 and 5, which is removably secured in a carrier 118 adjustably hung on trunnions 122 journaled in a plunger 124. The presser-foot can be adjusted to suit different tread angles of heels, and is preferably curved at its front edge to substantially the shape to be given to the heel breast, so that it serves as a gauge. The plunger 124 is connected by a double-threaded screw 130 to a spring-controlled lever 136, the connexion being adjustable by bevel-gearing 138, 140 on rotating a hand-wheel 142. The rear end of the lever 136 is connected to a rod 146, Fig. 2, which is pivoted to a rod 148, Fig. 11, located in a position to be engaged by rollers 150 carried by each of the treadle levers 96, 98. When either of these levers is depressed, the presser foot is lowered on to the work, to exercise a steadying pressure while still leaving the work free to be manipulated by the operator. The levers 96, 98 control the operation of a pair of gauges D, Figs. 1. 2, and 5, which are intended to be used alternately for rights and lefts, and to co-operate with the inner edge of the sole. They are adjustably mounted on rods 70, which are pivoted about inclined pins 72 carried by blocks 74, the distance between which is adjustable. The rear ends of the blocks 70 are connected together by a strong spring, and are adapted to be engaged in turn by fingers 78, 79, Fig. 2, which are moved in turn by rack-and-pinion gearing actuated from cam blocks on the depression of the respective treadles. In breasting shoes on wooden lasts, an additional positioning-device is provided, consisting of geared spring-pressed counter clamps. This, however, is removed when the shoe is breasted on the expansible jack previously described. After the shoe has been positioned, the power operation of the machine is started. This first causes the work-support to be firmly locked in position, and then forces the presser-foot down firmly upon the work. These operations are effected from a twopart rod 152, Figs. 2 and 11, connected by a compensating-spring 154. This rod is actuated by a cam on the main shaft, and carries a cam-piece 180, Fig. 11, which causes a serrated clamping-piece 168, Fig. 5, to engage a similar piece 166 on the workpost A. The upper end of the rod is connected to the presser-foot lever 136. The machine is supplied with a number of breasting-knives, to give different shapes to the breasts. Each knife C, Fig. 10, is mounted upon a shank 182, which is provided with an adjusting-screw 184, and the arrangement is such that the knife, shank, and screw are removable as a whole, so that, when replaced, they will occupy the same position relatively to the carrier as they did before removal. The head of the screw 184 is inserted in an ear 188 of a knife-carrier 186, and is rigidly secured to the latter by a clamping-screw 190 and a removable block 187, which straddles and engages beneath the head of the screw. The knife is prevented from bending by vertically. grooved blocks 193 removably carried by arms 191, which extend downwards from the carrier 186. The latter is positively actuated through a rod 198, Figs. 1 and 11, from an eccentric 204 on the main shaft ; this rod is in two parts connected by a spring, which is of such strength that it does not normally yield during the active descent of the knife, but, after the knife has been arrested, any further movement of the eccentric will be absorbed by the spring. The means for arresting the downward movement of the knife consists of a breasting-stop 212, Figs. 2 and 10, mounted on trunnions in the lower ends of slides 214. These slides are formed with racks 217, which are geared up to an actuating-rod 226, the connexions including a spring 224. The rod 226 is actuated from a cam on the main shaft, and the action is such that, just before the knife commences to descend. the stop is lowered until it contacts with the shank of the shoe with a light yielding pressure due to the spring 224. Then, as soon as the knife carrier 186 commences to descend, it actuates rollers 242, Fig. 2, which act upon split clamping-blocks 236 and cause them to grip the slides 214 against plates on the machine frame. The knife descends until an adjustable abutment 250, Fig. 10, carried by a cross-piece 192 in which the clamping-screw 190 is mounted, strikes the stop 212, when it is positively arrested. The chip cut from the breast by the knife is removed by a chipengaging device 252, Fig. 21, which is pivoted about a pin 254 passing through a slot 256 in one of the slides 214. The device is lowered with the breasting-stop 212 until the lower end rests on the shank of the shoe, and then a cam-surface 262 on the descending knife-carrier 186 acts upon a spring arm 260 formed by splitting the upper end of the device, and rocks it against the action of a spring 258, so that a toe 264 engages beneath the chip. Further descent of the carrier presents a notch in position to be engaged by a latch 266 on the split end of the device. A spring forces the latch into engagement with the carrier, which then commences to rise, carrying the chip-engaging device and a chip with it. Presently, the latch is released by the action of a cam-surface 270 formed on the slide 214, and then the knife continues its ascent alone until the carrier is clear of the device ; the spring 258 then rocks the device away from the heel so that it releases the chip. Preferably, two chip - engaging devices are used ; these may be arranged to release the chip simultaneously, or the one earlier than the other ; in the latter case, the chip will fall clear of the work. To remove from the sole any chips or fragments that may have collected upon it, a brush 350, Fig. 5, is provided. This is carried by a two-part adjustable rod 352, which is actuated by the movement of the workpost A into and out of its operative position. Any suitable form of stopping and starting clutch mechanism may be used. In the one shown in Fig. 11, the hub of the driving- pulley 276 is recessed at 278, and adapted to be engaged by a spring plug 282 in a collar 280 on the main shaft 275. This plug is normally held out of engagement with the recesses 278 by a dog 286. When, however, the rod 148 is actuated by either of the treadle levers 96, 98, it raises a rod 290 which carries a tooth adapted to engage and trip the dog 286. This frees the plug 282 and enables the pulley 276 to be clutched to the shaft. The ear 286 then falls back into its original position, so that it will always stop the shaft after a single revolution has been completed, whether or not the treadle has been released.