Patent GB-111057-A (GB)
Title: Eyeleting Machine.
Inventor: FAIRWEATHER WALLACE
IPC: A43D100/02
Filed: 1917-06-13
Abstract: 111,057. Fairweather, W., (Singer Manufacturing Co.). June 13, 1917. Setting eyelets.-An eyeleting-machine is provided with telescopically combined punch and set mechanism arranged on each side of the work support which serves as a block and clinching surface, the clinching taking place during the feeding of the work. The eyelets are removed by the punch from the raceway without movement of the latter. The spacing of the eyelets is effected by a cam having a member engaging therewith which is adjustable so as to traverse different paths on the cam but returns always to a zero position. The punch block is mounted on a pliable arm to allow it to adapt itself to the punches operating on its two sides. The machine is mounted on a base 1 and is driven by a pulley 2a mounted on a shaft which also carries peripheral cams 3, 4 and a face cam 5. The cams 3, 4 engage rollers 6, 6<1> mounted on spring-controlled levers. 7, 7<1> which bear on the punch and setting-tools. The ends of the levers 7, 7<1> have offset heads 11 recessed to receive blocks 13, 14, Fig. 5a, forming backing pieces to engage the punch and set. A relatively thin block 19 is slidably fitted in the block 14 and is controlled by a spring 20 mounted on the lever. The punch and set mechanisms, which are both carried by a yoke 25 traversed by the cam 5, comprise a tubular punch 49, 51 mounted in a set 47 slidably mounted in the yoke and pressed yieldingly against the backing pieces by springs 52. The block 19 is of sufficient width to allow the end of the punch to pass into its recess as shown in Fig. 5<a>. The yoke 25 is carried by a lever 26 pivoted to the support at 27 and having a roller 33 mounted thereon to engage the face-cam 5. The roller is adjustable by means of a screw 30 to give a varying throw of the lever and feed of the work. The yoke 25 is attached to the lever by a bolt 39 having an extension 40 operating in the slot of a fixed support 44 which serves as a guide. The punch block 54 has annular clinching surfaces 58 and is supported from the yoke 25 by a strip 55 of pliable metal. Adjustable guides 59, 62 also are carried by the yoke. A fixed worktable 63 is mounted on the machine frame and is recessed to allow the motions of the punch and set. A spring presser-foot 66 with flanged edge 68 is fixed on either side of the work table. The face cam 5 has a flat portion 5<a>, the remainder having a tapered section to produce the variation in feed when the roller 33 is adjusted. In operation, starting with the roller 33 on the part 5<a> and the punch and set withdrawn as shown in Fig. 10, the punch is moved downwards and to one side to remove an eyelet from the end 70 of a raceway 69 wherein it is retained by a spring 71. The punch is then moved downwards to punch the work but remains stationary laterally as the part 5<c> of the cam 5 is flat. A part 5d of the cam then traverses the punch and set, the set being simultaneously forced forward to clinch the eyelet while the punch telescopes therein as shown in Fig. 5<a>. The flat part 5<c> allows the punch and set to be withdrawn while the work remains stationary, whilst a final descending portion 5f returns the punch and set to the initial position.