Patent GB-190501672-A (GB)
Title: Improvements in and relating to Machines for Making and Setting Rivets.
Inventor: COSTA CHARLES FREDERICK DA
Filed: 1905-01-27
Granted: 1905-10-12
Abstract: 1672. Lake, H. H., [Costa, C. F. da]. Jan. 27. Staples ; stapling. -Relates to machines for cutting metallic rivets or fasteners from the strips shown in Figs. 17 and 18, and for setting them in boxes &c. Figs. 2 and 3 are end and side elevations of the machine, and Fig. 7 is a horizontal section on the line a-a, Fig. 3. The strip is fed through the tube 22, and the fastener is cut off by the cutters 76, 27 and shaped by the dies 65, 16. The part 10 carrying the die 16 then swings from a horizontal to a vertical position, and the fastener is ejected and driven into the work by the plunger 4 acting on the head 18 of the plunger 17. The part 10 is pivoted on the pin 11 to the lower end of the reciprocating bar 5, and has a stud 12 engaging the curved groove 8 in the cover-plate 6, so that the downward motion of the bar 5 causes the part 10 to swing from the horizontal to the vertical position. The plunger 17 extends through the die 16, and its motion is limited by a catch 19 operated by the spring 20, or by a rod 19<a>. The plunger 4 is operated by the lever 41, having a roller 43 engaging the cam 44. The disk 40 on the lever 41 has an angular slot 45 into which fits the pin 46 on the bar 5. The form of the slot 45 is such that the parts 4, 5 at first descend together, and then, when the pin 46 enters the vertical part of the slot, the plunger 4 descends alone and strikes the plunger 17, which ejects the fastener from the die 16 and drives it into the work. The strip is coiled in the flat tray 82, and is drawn through the groove 24 in the feed-tube 22 by the pawl 37, pivoted to the bar 34, which is reciprocated by the lever 48 operated by the cam 59. After being severed, the strip is pushed clear of the cutting-die 27 by the block 28, lying in a square hole in the tube 22, and acted upon by the spring 32. The block 28 is retained by the pin 30, acted upon by the spring 31, and its movement is limited by the die 27. The pin 30 has a bevelled top, offering little resistance to the feeding of the strip. The pin also holds the strip in position for the cutting operation. To adjust the feed, the pivot 53 of the lever 48 has an eccentric bushing, turned by means of the head 50 and clamped by the screw 52. One side of the fork engaging the stud 54 consists of the pivoted plate 55, retained in position by a pin acted upon by the spring 55<a>. The plunger 63 carrying the die 65 is operated by the cam 44 engaging the pin 67. The arm 68, mounted on the plunger 63, carries the pin 69 on which is mounted the eccentric cylinder 73<11>, clamped by the set-screw 72, Fig. 3. The screw 74, bearing against the shoulder 66, adjusts the position of the arm 68. The cylinder 73<11> works in the curved slot 81 in the bell-crank lever 79, which is pivoted to the bracket 61 and operates the cutter 76. The throw of the cutter is adjusted by turning the eccentric cylinder. The cutter 76 has two cutting-edges 77, 77', Fig. 16, and at each stroke severs one of the fasteners from the strip shown in Fig. 17 and partly severs the next. With the strip shown in Fig. 18, a plain cutter is used. The driving-wheel 86 is mounted loosely on the shaft 85, and operates the cams 44, 59 by means of the ratchet teeth 91, engaging the pawl 92 mounted on the cam 59. The pawl maybe held out of engagement by the thumb-screw 94 engaging the hole 95. The automatic brake 97, Fig. 3, for preventing back-lash of the cams when they are suddenly stopped, is thrown into engagement with the surface 89 of the cam 44 by the spring 100. It is held out of engagement while the machine is working by the bevelled end 111 of the bar 104, Fig. 2, which is operated by the bell-crank lever 112 connected by the rod 115 with the treadle 118. When the treadle is released to stop the machine, the end 110 of the bar 104 is forced by the spring 107 against the part 96 of the pawl 92, releasing the pawl from engagement with the teeth 91, and at the same time the brake 97 comes into action.