Patent GB-251784-A (GB)
Title: Improvements in or relating to machines for making football-boot studs and bars, andheels for boots and shoes
IPC: A43D33/00
Filed: 1925-05-23
Abstract: 251,784. Jacques, C. May 23, 1925. Loose-nailing. - A machine for making studs or bars for football boots or heels for boots and shoes comprises a rotary carrier provided with a number of cutting and nailing units situated equidistantly, each comprising a shaped knife or die, a nail throat, a set of nail drivers, and a nail driving plunger, the dies carrying the blanks round to different stations or points where the requisite operations are performed. As shown, circular dies 9 are provided, for cutting out discs for making studs for football boots. Each die is fitted with a throat block 11 formed with nail guides in which fit drivers 14 secured to a driving plunger 15. The block 11 is normally held raised by a spring 19. Six of these units are equidistantly spaced around a carrier 1 rotating about a central bearing 2 and supported bv springs 6 engaging a thrust bearing 5. Above the carrier is a beam 21 carrying an anvil 22 and a block 23, the latter being formed with holes corresponding to those in the block 11. The anvil 22 and block 23 are positioned above two of the cutting and nailing units, and the beam carrying them is reciprocated vertically by mechanism driven by a one-rotation clutch. This movement of the beam operates a plunger 26 which oscillates an arm 29 on a shaft 28 mounted in bearings fixed in the machine frame and carrying members actuating two plungers 24, 25 adapted to engage the plungers 15 of the dies at two of the stations. The plunger 25 is that for ejecting the finished stud and is arranged to operate mechanism for rotating the carrier. For this purpose the plunger is not operated at each descent of the beam 21, but only when an arm 33 pivoted to one of the members on the shaft 28 is positioned below the plunger 25 when the beam 21 descends. The arm 33 is adjustablv connected to a bell-crank lever 50 provided with a roll 51 engaging a cam 49 fixed to a rotary drum to which is secured one end of a chain 39 which passes around a groove in the carrier and is provided with a pin 40 engaging teeth 38 two of which correspond to the distance between adjacent dies. The other end of the chain is secured to a spring which tends to rotate the carrier. The member which carries the arm 33 is normally depressed by a. spring 35 and also carries a pawl 54 guided by pins 57 and adapted to engage pins 56 on the cam 49. One of the plungers 15 is normally engaged by a pivoted catch to prevent rotation of the carrier under the influence of the pin 40. In operation, nails are placed bv hand in the throat block of the die shown on the left of Fig. 1. A flat piece of leather is placed over the die under the block 22 and the clutch treadle depressed. The block 22 descends and a circular piece of leather is forced into the die, depressing the throat, block 11 against the thrust of the spring 19. The carrier feed is designed to operate after three such depressions of the clutch treadle, resulting in three superposed discs of leather being positioned in the die under the block 22. The first depression of the beam 21 operates through the plunger 26 and pawl 54 to advance the pin 40 to engage the next tooth 38. The second depression advances the pin to engage a further tooth, the high portion of the cam 49 simultaneously passing off the roll 51, so that on the third depression of the beam the ejector plunger 25 is operated. As this plunger raises the plunger 15 of the unit above it out of engagement with the pivoted catch which normally prevents rotation of the carrier, the latter is turned by a spring until the catch engages the next plunger 15. Between the disc-cutting and stud-ejecting positions in the machine each unit passes to a position between the plunger 24, Fig. 4, and the block 23. On the first cutting stroke of the beam 21 the plunger 24 is actuated to drive the nails through the leather discs and compress the stud.