Patent GB-348126-A (GB)
Title: Improvements in or relating to eyeleting machines
IPC: A43D100/02
Filed: 1929-12-03
Abstract: 348,126. Setting eyelets. THOMPSON, S. and THOMPSON, F. S., 26, Buxton Street, London Road, Manchester. Dec. 3, 1929, No. 36945. [Class 43.] In an eyeleting machine of the kind in which a punch, carried by a punch-bar adapted to reciprocate in a fixed or set position, co-operates with a die to punch a hole in the work, after which the die moves clear whereupon a clencher-bar provided with a spring pin comes into operation to snatch an eyelet upon the pin and insert it in the hole, a separate clenching-tool is provided which is adapted to be moved into operative position relatively to the punch; after the latter has punched a hole in the work and has been retracted therefrom, so as to be actuated by the next movement of the punch to clench an eyelet that has been meanwhile inserted in the hole, the clenching-tool being moved into an inoperative position, after the following return movement of the punch, to permit of the succeeding operation of the punch. The punch 6 is carried by a punch-bar 5 fitted in a sleeve 20 mounted in a fixed head 11, and is operated by a lever 12 one end 12a of which passes through a clearance slot 20a in the sleeve 20 and engages in a slot 5a in the punch-bar, and the other end of which is provided with a bowl 12c coacting with a cam 13. The cam 13 is mounted on the shaft 14 and is provided with two peaks 13a, 13b of unequal height. A spring 21 fitted between the head 11 and a flange 20b on the sleeve 20 normally holds the sleeve raised, and the sleeve holds the punch-bar raised by means of a spring 22 which is fitted between a washer bearing against the upper end of the sleeve and a stop 5b on the upper end of the punch-bar. The die 7 is carried by a lever 8 operated by a link 15 and a lever 16 carrying a bowl 16b which coacts with a cam race 17 formed in a disc 18 on the shaft 14. The clencher-bar 9 is operated by a lever 19 one end of which engages in a slot 9a in the bar and the other carries a bowl 19b which coacts with the cam race 17 in such a manner that when the die 7 is in operative position, the clencher-bar is lowered. The clencher-bar 9 is provided with a spring-pressed pin 10 and is adapted, after a hole has been punched, to rise and snatch an eyelet from the usual feeding device and insert it in the hole, and when the clenching has been effected, to fall again. The clenching-tool 25 is carried by an arm 24 secured to the bottom of a spindle 23 mounted in the head 11 parallel to the punch-bar 5 and capable of both axial and angular motion. An arm 26 in splined on the upper part of the spindle 23 and is connected by a link 27, lever 28 and link 29 to one end of a lever 30, the other end of which carries a bowl 30b held in contact with a cam 31 on the shaft 14 by a spring 32. Normally the punch-bar 5 and sleeve 20 are raised, the die 7 is in position below the work 33 on the table 34, the clencher-bar 9 is lowered, and the clenching-tool 25 is to one side of the punch-bar 5. Upon the lever 12 being actuated by the higher peak 13a on the cam 13, the punch-bar 5 and sleeve 20 are depressed, and a hole is punched in the work. During the following upward movement of the bar 5 and sleeve 20, the lever 8 is operated to move the die 7 clear, the lever 19 is operated to raise the clencher-bar 9, and the lever 30 is operated by the spring 32 to rotate the spindle 23 and carry the clenching-tool 25 below and into line with the punch-bar 5, so that upon the next depression of the bar 5 and sleeve 20 by the lower peak 13b of the cam 13, the clenching-tool 25 is operated to clench the eyelet. During the next upward movement of the bar 5 and sleeve 20, the spindle 23 and arm 24 are raised by the spring 35, and the spindle is rotated by the cam 31 to carry the tool 25 clear of the punch.