Patent GB-190916212-A (GB)
Title: Improvements in or relating to Machines for Inserting Fasteners in Leather.
Inventor: PLANT THOMAS GUSTAVE
IPC: A43D69/04
Filed: 1909-07-12
Granted: 1910-07-07
Abstract: 16,212. Plant, T. G. July 12. Slugging.-In a slugging or similar machine in which slugs are formed from a length of wire, the working head 3, which is reciprocated by a pitman 51 operated from the main shaft, is formed as a sleeve within which is fitted another sleeve 7 carrying at its lower end a bracket 200, on which are mounted knives 40 for cutting- off the driven slug. The sleeve 7 surrounds a spindle 8, Fig. 9, which carries at its lower end a chuck 10<1> provided with arms 11 interlocking with arms 12 extending upwards from a gripperactuating ring 13. The ring 13 is screwed into a sleeve 14, which is itself secured by an interrupted screw thread to a sleeve 15 supported by an apron 201, Fig. 3, secured to the working head 3. The gripping-jaws 22, which move in slots formed in a cylinder 20 extending from the spindle, are supported by carriers 23, which are provided with projections 31 engaging in a groove in the interior of the ring 13. The carriers are held in place by a bearing-ring 33 interposed between the ring 13 and the gripping- jaws, and secured to the carriers by pins 34. Throat-pieces 21, clamped by screws 36 to the ring 20, guide the wire to the work; one of the pieces is adjustable to allow for wear. Jaws 24 in the chuck prevent backward movement of the wire. The cylinder 20 is prevented from rotating by pins extending into recesses in a presser plate 37, while the sleeves 14, 15 are similarly prevented by being bolted to the apron 201. Rotation of the spindle causes the ring 13 to be screwed downwards, and, through the bearing-ring 33, forces the grippers 22 against inclined faces 26 on the sleeve 14, thus closing the grippers on the wire. After the wire has been gripped, the working head and the sleeve 7 with the spindle 8 are depressed until the presser plate strikes the work; the sleeve and spindle then come to rest while the working head continues its movement and forces the wire into the work. The sleeve 7 is provided with a collar 56 resting on the working head 3 and held against it by an adjustable spring. The presser plate 37 is connected by a pivot 38 to the bracket 200. A stop-pin 143 can be pushed forward to engage the bracket 200 when it is desired to operate the wire-feed mechanism without having a shoe on the horn. The work is fed by a feed-bar 6 mounted in a carriage 70 which swings on a vertical pivot 71. The bar is reciprocated in bearings 73 by an actuator 75 pivoted to a link connected with the pitman 51. The bar may be adjusted for driving an inner row of fasteners by moving a treadle-operated stop 84 out of engagement with a screw 85 on a lever 80 carrying a stud 77 engaging in a fork on the actuator 75. To adjust the grippers for the wire, the spindle extension is removed from the machine, a piece of wire is inserted in it, and the upper end of the extension is passed into a device on the machine frame comprising a cylindrical shell having projections to engage the arm 12 and another projection to enter a groove in the cylinder 20. The inner portion of the extension being thus held against rotation, the sleeve 14 is rotated until the grippers close on the wire. The sleeve 15 is then turned to engage with the interrupted thread on the sleeve 14, and the extension is replaced. The spindle 8 is rotated by a yoke 44, Fig. 5, rocked by a knuckle-piece 42 on a crank on the main shaft. The connexion between the spindle 8 and the yoke 44 is adjustable, an arm 49 provided with an eye, through which passes a rod mounted on an arm 47 pivoted to the yoke 44, having an eccentric portion passing through the spindle 8. The machine is started by the clutch shown in Fig. 4. A driving-pulley 100 is rigidly connected to a clutch ring 101 having apertures 102, in one of which a clutch pin 103 may be inserted. The pin 103 is pressed forward in its hub 104 by a spring 105, and is withdrawn by a treadle-operated wedge engaging a shoulder 106. When the treadle is depressed, the pin 103 is freed and the machine starts. The pin 103 may be locked out of engaging position by moving a rod 114, which carries at its end an inclined pin 115 passing through an inclined slot in a locking pin 112. An inward movement of the rod forces the pin 112 into a recess in the pin 103, and thus locks the latter.