Patent GB-191019337-A (GB)
Title: Improvements in or relating to Machines for Stamping or similarly Operating upon Leather or like Sheet Material.
Inventor: BOULT ALFRED JULIUS
IPC: A43D95/14
Filed: 1910-08-17
Granted: 1911-08-17
Abstract: 19,337. Boult, A. J., [United Shoe Machinery Co.]. Aug. 17. Index type-wheel machines for embossing leather; alining for impression; driving-mechanism; sheet - guiding arrangements. - Relates to power - driven machines for stamping size, width, colour, and like marks on leather or other sheet material. (1) The stamping - disks 21, 22, 23, Figs. 3 and 5, are set by means of wheels 41, 42, 43, assisted by registration marks on ribs 45 on the disks and a fixed index bar 44, the ribs 45 also serving to prevent rotation of the dies and being formed to co - operate with spring-actuated detents 46 to stop the dies in correct position for stamping. (2) The dies are mounted on a shaft 25 carried by a lever 26, which is operated by a bellcrank 28, eccentric strap 19, and eccentric 18 on a shaft 8. The eccentric 8 and a driven gear - wheel 7 are loosely mounted on the shaft 8, and they are connected for one revolution only by a clutch consisting of a roller-carrying member 10, Fig. 2, freely mounted on the eccentric 18 and acted upon by a spring, which tends to force its rollers into wedge-shaped recesses in the eccentric 18 and so to connect the members 7 and 18. The member 10 is normally held by a spring- controlled abutment 12, Fig. 3, which can slide in a spring-controlled arm 13 and normally engages a projection 11 on the member 10. On operating a bell - crank 15 by depressing a treadle, a latch 17 on the bell-crank engages a pin 16 on the abutment 12 and moves it out of the path of the projection 11, thereby engaging the clutch. The abutment then rises out of the path of the latch 17, and a spring returns the arm 13 to move the abutment again into the path of the projection 11, so that the clutch is disengaged at the end of one revolution. A brake 20 applied to the eccentric 18 ensures satisfactory operation of the clutch even with a light load. The connexion between the bellcrank 28 and the lever 26 comprises a rod 30, which screws into the lever 26, a spiral spring 32 engaging a fixed abutment on the rod and pressing the bell-crank 28 into contact with a boss on a hand-wheel 31 keyed to the rod. By rotating the wheel 31, the point of nearest approach of the dies to the work can be varied, and by moving the wheel 31 along the rod by means of a nut 34, the pressure of the dies may be varied. (3) The work is placed against a gauge 58 carried by a socket 56 on a rod 55, which is adjustably secured by a set-screw 59. The gauge 58 is acted on by a spring 57, which tends to depress it below the work-table 54, but, when the dies are in the raised position, arms 62 on the lever 26 raise the gauge to operative position. These arms 62 engage stops 63 which serve to prevent the dies from being moved on to the work-table. Guards for machines.-A bent wire 70, Fig. 3, secured to the frame at either side serves as a safety guard. Dies, securing on carriers. - The dies 24, Figs. 3 and 5, are formed with cylindrical shanks 24* which pass through holes in flanges of the disks 21, 22, 23 and are secured in position by screws 24**.