US1670208A - Apparatus for the manufacture of fancy knitted fabrics on circularknitting frames - Google Patents

Description

May 1-5, 1928.

RA APPARATUS FOR THE MANUFACTURE OF FANCY KNITTED FABRICS 0N CIRCULAR KNITTING FRAMES Filed April 1926 2 Sheets-Sheet 1 Fl l Fe/ 9 Fig.2

I I 5 II Fl l m I 9 F? f h gnuewloz GJUSEPPBMGRA May 15, 1928. 1,670,208

G. NIGRA APPARATUS FOR THE MANUFACTURE OF FANCY KNITTED FABRICS 0N CIRCULAR KNITTING FRAMES Filed April 6, 1926 -2 SheetS -Sheet 2 v 611155 12 5 ZV'JGRA Patented May 15, 1928.

UNITED STATES i 1,670,208 PATENT, OFFICE.

GIUSEIPPE mean, or TURIN, ITALY, ASSIGNOR, To 0. M. I. M. OFFICINA momma;

INnUsTn A MAGLIERIA, or TUBIN, ITALY, A COMPANY.

APPARATUS Eon. THE IvIANUFAcTi RE 01* FANCY KNITTED FABRIC on uncomm- KNITTING FRAMES. 1

Application filed liprll 6, 1926, Serial No. 100,136, and in Italy April 1,0, 1925.

This invention relates to the manufacture and will each time it is moved cause the reof two colour knitted fabrics upon circular knittingframes and has for its object means for manufacturing knitted goods of variable designs either by merely periodically reversing two' threads of different colour to obtain vertical stripes, or to obtain varied patterns, such as rhornbic, square or likefigures means may also be provided for instantaneously reversing the threads.

The apparatus operates in the following manner: I

Two threads of different colours exchange positions (-i. e. are reversed) at predetermined intervals with respect to the needle whereby the stitches of the respective colours are visible sometimes on the face and sometimes on the back of the fabric, thus forming a pattern of one colour upon the foundation of another colour.

The apparatus comprises an arrangement for reversing two threads of different col-- ours upon the needle and another arrangement for varying according to the pattern desired the moment in which the reversing arrangement comes into action.

The invention is .illustrated in the ac companying drawings, in which Figure 1 is an end elevation'of the operating disk and a plan view of the reversing levers, Figure 2 is a side view of the reversing levers and a plan view of a portion. of the operating disk. igure 3 is a side elevation partly in section of the controlling means mounted on a shaft radial with respect to the frame.

The reversal arrangementcomprises two hook levers 1 and 2 guiding the differently coloured threads I, and f and a third lever arm 3. tively at I, II and III, on a suitably shaped stirrup 4, suitably fixed to the frame. The "ear end of lever 1 is pivoted to the lever 2 at 5, and to the lever 2 at the pivotal point 5, the arm 6 of the lever 3 is pivoted. The lever 3 acts on arm 6 of lever 3, which car ries at the end of its arm a roller 7. The lever 3, when acted on, forces levers 1 and 2 reciprocally to exchange their positions;

and for this purpose roller 7, under the action of a spring not illustrated) enters into or comes out of notches 8 suitably dis-- tributed over a rotating disk 9 or the like.

On the rotation of disk 9 roller 7 will suecessively engage and come out of notches 8 The three levers are pivoted respeevercal of threads f, and f, so alternately causing oneto appear on the face and the other at the back of the fabric.

Referring to Figure 3, 9 is a disk similar to disk 9 in Figures 1 and 2, suitably mounted upon a shaft 10 upon which is keyed a toothed wheel 11 placed in rotation by the rotating plate of the frame, for example, through a rack 12 fixed thereto. The

shaft 10 is supported, for example, by a stirrup 13 carried by a plate 14 fixed to the frame, in any convenient manner. As illustrated 15 is one of the needles, 16 one of the smkers and 17 a means for anchoring the needles upon 'the rotating plate, although this of course forms no part of this invention.

Disk 9 isby toothed wheel 11' rotated at a constant speed with the frame and it will easily be seen that roller 7 on engaging and passing out of notches 8 on the disk will cause levers 1 and 2 to be given corresponding periodic reversal; the colour of the threads will also be reversed, having for effeet to form alternating vertical stripes on the fabric.

' 'If other patterns are desired it will be necessary to effect the reversal of the thread at predetermined differing intervals and not at periodic constant intervals. According to this invention this is obtained by giving to the disk 9 additional partial rotations whether in the same direction of rotation or in the contrary direction of rotation, i. e..

giving an advance or a lag to the period at which roller 7 will engage or come out of the notches on the disk.

For this purpose the disk 9 is mounted in the following manner:

Upon the shaft 10 there is provided a loose drum 18 having a flange to which disk 9 is secured. Drum 18 is fast with a worm wheel 19 in mesh with a worm 20. Worm 20 is carried by a disk 21 fast with the shaft 10 and itself receives rotary movement through a pair of bevel wheels 22,23, carried by disk 21. Upon the spindle of bevel wheel 23 is keyed a ratchet wheel 24 having large teeth in which can engage a spring pressed rod 25 guided in a dashpot 26 and actuated by any control member at a suitable time, for example, by lever arm 27 whose other arm is moved in the direction of the 1 arrow by a flexible transmission controlled by any regulating apparatus or counter not illustrated.-

When the regulating apparatus is inoperative and the rod 25 is out of engagement 1 with the ratchet wheel 24, as shown in" the 2 of Figure 1' will be periodically reversed in position and thus the threads.

When, however, .rod is brought into action and engages between two teeth on colours of the ,ratjchet 24, then owing to the movement of rotation given to ratchet 24 by the disk 21 around the shaft 10, it is forced to make a partial rotation upon'its own axis; this rotation is transmitted through bevel wheels 23 and 22 to worm 20, worm wheel 19 to drum 18 and to risk 9, imparting to this an additional movement of rotation.

Notches 8 on disk 9 will thus come opposite the roller 7 at positions relatively different from that which took place in the procedure before described and each will produce its effect with a displacement of the side at which the colour stripe appears with respect to the effect produced by the same groove during a previous rotation or series ofrotations. The colour stripe, or the reversal of the two threads, is for this reason suitably displaced, and by combining in different manners the-relations of the pinions and of the couple, worm and worm wheel with the apparatus controlling the lockin rod, most varied patterns maybe obtaine In the method of carrying out the invention illustrated, to impart a positive or negative additional rotation of the disk 9 rod 25 is'caused either to engage between the teeth on the toothed Wheel above (as indicated in the drawing) or below the axis of rotation of the toothed wheel 24 so that it willefi'ect a relative rotation to the right. or to the left around its own axis.

It will be easily seen. that the'arrangement for giving an additional rotation to disk 9, as well as the lock members varying the moment at which it is brou ht into 0 eration, may be different from t e forms 11- lustrated without departing from the scope of the invention. It

What I claim as my invention is:

, 1. In a circular hosier knitting machine, the combination of a pair of thread guides situated in different planes, means operated by a notched disk for acting on said thread guides, a rotated shaft on which the disk is loosely mounted, a worm wheel fast with the disk, a worm in mesh with the worm wheel, a disk fast with the shaft and carr ing the worm, and means for periodical y rotating said worm on its own axis.

2. In a circular hosiery knitting machine, the combination of a air of thread guides situated in different p anes, means operated by a notched disk for acting on said thread guides, a rotated shaft on which the disk is loosely mounted, a worm wheel fast with the disk, a worm in mesh with the worm wheel, a disk fast with the shaft and carrying the worm, a pair of toothed wheels in mesh with each other, one of said wheels being fast with the worm, and means for causing said other toothed wheel periodically to be rotated about its own axis.

3. In a circular hosiery knitting machine,

the combination of a pair of,thread guides situated in different planes, means operated by a notched disk for acting on said thread guides, a rotated shaft on which the disk 1s loosely mounted, a worm wheel fast with the disk, a worm in mesh with the Worm wheel, a disk fast with the shaft and carrying the worm, a mesh with each 0t er, one of said wheels being fast with the worm, a ratchet fast with the other said toothed wheel, a plunger, and means for moving said plunger into the path of the said toothed wheel. In testimony whereof I have signed my name to this specification.

i GIUSEPPE NIG-RA.

air of toothed wheels in

Images