GB196921A - Improvements in machines for forming looped wire strips - Google Patents

Abstract

196,921. Spirella Co. of Great Britain, Ltd., (Assignees of Wolf, F. A.). April 27, 1922, [Convention date]. Making metal fabrics; corrugating.- In a machine for making looped-wire strips for corset stays &c., a forming finger is reciprocated to and from pins carried by a pair of blocks, which are alternately moved in a direction substantially at right angles to their working faces, and which are simultaneously moved in a direction parallel to their working faces and transversely to the line of reciprocation of the finder. The wire is passed through holes 5, 6 in a head 4 and in a forming finger 3 secured thereto. The head is reciprocated by a link 7 and eccentric pin 11 on a shaft 8, which is driven by bevel gear 16 - - 19 from a shaft 15 rotated by spur gear from the main shaft 12. In order to vary the stroke of the head, the link 7 is mounted on an eccentric sleeve 9 secured on the pin 11 by a screw 10. The pin-formers 28 - - 31, Fig. 9, are carried by a pair of blocks 21, 22, mounted on arms 23, 24, which are alternately oscillated on pivots 25, 26 towards and from the line of movement of the forming finger by a pair of bars 45, 45<a> reciprocated by cam slots in a pair of discs 42, 42<a> on the. shaft 15. The arms are mounted on a slide 27 which is reciprocated in guides 33, 34 by a pair of rocking-arms 39, 39<a>, carried respectively by shafts 37, 37<a> operated by face cams on the discs 42, 42<a> through arms 41, 41<a>. The guide 33 is of wedge-shape and is moved longitudinally to vary the lateral position of the slide, the guide 34 being correspondingly adjusted by screws 36. The first loops are made by hand or by operating the machine by hand and the machine is then started. When the finger moves down with the arm 23 in the position shown in Fig. 7, the wire is bent over the pin 28 as shown. The finger then rises and the arm 24 comes forward so that the pin 30 engages the wire as shown in Fig. 9. The slide 27 is then moved to the right and the arm 23 retracted, whereupon the finger descends and bends the wire over the pin 30 to form the next loop, Fig. 11, and so on. The arms 23, 24 are held yieldingly upwards by means of springs against the heads of their pivot pins so that they may be moved down by a shoulder 56 on the forming finger to feed the fabric through the machine. The fabric is held during formation by the bevelled inner sides of a channel-shaped die 50, Fig. 4, which is carried by a presser-foot 49 pivoted on the slide, and pushed forward by a spring-pressed rod 52. The pressure of the spring 53 is adjusted by a screw-collar 54. and the rod is held from rotation by a key 55 and slot.