Patent GB-190700197-A (GB)
Title: Improvements in or relating to Boot and Shoe Breasting Machines
Inventor: JUSTICE PHILIP MIDDLETON
Filed: 1907-06-03
Granted: 1908-06-03
Abstract: 197. Justice, P. M., [Manufacturers' Machine Co.]. June 3. Heels.-Relates to a breasting-machine, especially adapted for heels, in which the shoe &c. is supported in an inverted position on a pivoted worksupport, and the heel is breasted by an adjustable vertically-reciprocating knife, the breasting-stop being supported independently of the shoe while it arrests the operation of the breasting.knife. The work is placed on a jack block 29, Fig. 3. pivoted to a head 28 on a pivoted rod 20 formed in two longitudinally-adjustable parts. The inclination of the block 29 can be adjusted by means of screws 32, to vary the " tread angle" to be formed by the knife 195. When the shoe is mounted on the block 29, it is moved to the position shown by the full lines in Fig. 3, in which it is temporarily held by a presser foot 66, connected to a plunger 57, which moves in guides and is operated by the depression of a treadle connected to a wedge 34, Fig. 15. This wedge works in a slot 36 in a yoke 37 connected to a link 38, which is arranged to be reciprocated vertically by a cam 44 on the driving-shaft 45. The wedge raises a rod 48, which actuates a lever 51, Fig. 3, adjustably connected to the plunger 57, and depresses the plunger. The plunger is connected by pivots 65, 67 to the presser-foot ; the pivot 67 is carried by a rod 68 adjustably connected to an arm 69 of the plunger, thereby enabling the presser to be tilted to correspond to the block 29. Rollers 74, mounted in plates 72, 73 yieldingly supported in the presser, bear on the work, and hold it yieldingly, until the machine is started by moving the work to the position shown by the dotted lines in Fig. 3 ; then the rod 48 is further raised by the action of the cam 44, and the work is thus held more securely in position during the cutting operation. The work is placed in the correct position relatively to the knife 195 by means of trippers 91, 92, Fig. 7, provided with hooks 93, one tripper serving to engage the corner of the toplift of a heel of a right shoe and the other to act similarly on a left shoe. Side gauges 158, 159, Fig. 13, are preferably used to cooperate with the trippers 91, 92 respectively. The side gauges are adjustably connected to blocks 160, 160<1>, which are adapted to be rotated to bring the gauges alternately into the operative positions, shown by the dotted lines in Fig. 13, by teeth on a rod 170, which is alternately moved to the right and left when the rod 48 is raised to bring the presser into position. Springs 172 normally hold the rod 170 so that both side gauges are in inoperative positions, and the pivots of the gauge blocks are also controlled by springs. The adjustability of these gauges allows the angle of the knife to a line drawn from the heel to the toe of a shoe to be varied. The trippers 91, 92 are so constructed that one is operative while the other is inoperative, and they are adapted to act alternately so as to enable right and left boots to be treated in turn The trippers are similarly constructed ; the tripper 91 is formed of a rod 94, Fig. 7, adjustably connected to a rod 95 movable in a casing 96, which also slides in a casing 97 mounted on a spring.controlled pin 98 pivoted in the presser. When the work is pulled by the operator into the operative position, the rod 95 is pulled out against the action of a spring 128, and the casing 96 moves with the rod 95, until a stop 139 on the casing 96 engages the face 140' of a plate 140 secured to the presser 66. The rod 95 then moves forward relatively to the casing 96, and a cam-surface 135 on the casing 96 permits a spring-controlled pin 132, provided with a similar cam-surface adapted to slide in a cylinder 131 on the rod 95, to be depressed ; this pin 132 depresses a lever 141, Fig. 3, which, through a plunger 144, actuates a lever 146 connected to a yoke mounted in a slide, which actuates the knife carrier. This yoke moves an ear 153, Fig. 11, which normally holds a lever 154 connected to a spring- controlled rod 90, and the rod rises, thereby causing a clutch, Fig. 15, to be engaged. The clutch consists of two parts 82, 81 rigidly connected and splined to the shaft 45, and a part 85 fixed to the shaft and provided with springs 86, 87, which tend to force teeth 88 on the clutch into engagement with teeth 89 attached to a driven loose pulley 46. Normally, the rod 90 is engaged between the members 85, 82, but when the rod is raised the springs 86, 87 force the parts 82, 81 so as to cause the teeth 88, 89 to engage. When the shaft 45 rotates, the cam 44 raises the rod 38 further, to clamp the presser-foot 66 more firmly on the work, and a cam 106, Fig. 15, is rotated by gearing from the shaft 45, and actuates a cam lever connected by a rod 113, Fig. 11, to a bellcrank 114, 118 connected to a rod 103, which embraces pins on yokes attached to the pivot pins 98, Fig. 7, of the casings 97 in which the trippers 91, 92 are mounted. The cam 106 makes one revolution for two revolutions of the shaft 45, and it is so formed that the trippers 91, 92 are alternately left in the operative positions when the driving-shaft stops ; when the driving- shaft starts and the work has been clamped in the correct position, the active tripper is rotated out of the way of the knife. The rod 103, Fig. 11, is provided with a stud which moves a slide 177 mounted in the rod 48, and this slide carries a wedge 180, which, as the rod 48 is raised, engages one of two spring-controlled lugs in a block, which is moved to the right or left according to the position of the block 177. The first-mentioned block, by suitable connections, moves the correct side gauge, 158 or 159, into operation. When the shoe is first placed on the jack, the hook 93 is prevented from engaging the heel lift by a pin 122, Fig. 7, but when the boot is pulled forward, engagement is effected. The stop plate 140 is formed with a curved front surface 140<3> similar in shape to the knife, to position the plate correctly, and to ensure a correct plate being used. The surfaces 140<1>, 140<2> are shaped so that the knife 195 comes into operation at different times according to the widths of the heels being acted on, and so adjust the lengths of the heels. The knife 195 is mounted in a slide 59, Fig. 3. which is vertically reciprocated by a head 204, Fig. 11, actuated by an eccentric and formed with ears 205, 206, which move on fixed guides 207, adjustable springs transferring motion to the slide 59, so that the slide may be stopped before the head 204 completes its descent. The knife 195 is attached to a slide 196, Fig. 3, connected to a slide 241, which can be adjusted vertically in the slide 59 by means of a screw bolt 198, gearwheels 199, 200, and a hand-wheel 201. To allow for wear of the knife, the slide 196 can be adjusted relatively to the slide 241 by means of a worm 246 engaging a rack 247 on a slide. The depth of the cut is adjusted by means of an adjustable abutment 239 on the slide 241, which comes into contact with a shield 220, and stops the descent of the knife. The shield 220 is attached to arms 221, which are normally held to the slide 59 by a spring-actuated lever and stop mechanism, which is released as the slide 59 descends, thereby causing the shield 220 to fall on the sole. As the slide 59 continues its descent, cams on the slide engage split clamp arms, and rigidly clamp the arms 221 to ribs on the frame, and thus securely hold the shield 220 in the position it takes up on the shoe sole. The machine is automatically stopped, as the head 204 ascends, by the projection 153 on the yoke, which moves the lever 154 and depresses the rod 90 to free the clutch.