US1782161A - Circular-knitting machine - Google Patents

Description

Nov. 18, 1930.

J. H. G. BAYLES CIRCULAR KNITTING MACHINE Filed Nov. 26, 1929 Patented Nov. 18, 1930 cIRcULAn-im rrme MACHINE Application filed November 26, 1929, Serial No. eoassaana' in Great Britain December 12, 1928. c

Thisinvention relates to improvements in circular knittingmachines, and refers to improvements in the means that are provided for adjusting the 'presser and sinker-cams of such machines. The invention is more particularly applicable to 'multi-feeder machines fitted with independently operated bearded needles, which latter necessitate the provision at each feeder of an adjustable vl0 Presser-cam preferably-arranged so that it can be put out of action by the automatic mechanism which is provided for stopping the machine when 'a thread'fails or breaks.

- In circular knitting machines of this type,

v three adjustable cams are provided in or on the sinker cam-ring at each yarn feeder, that is, one presser and two sinker-cam elements. These cams are in' existing machinesadjusted by means of screwslocated inthe body of the sinker cam-ring, and the latter has to be pro-- vided with horizontally disposed radial holes to admit the screws. The cam-ring is consequently weakened to a serious extent where the adjusting screws are situated, and has in con'sequence to be made stronger and heavier than would otherwise be necessary.

According to this invention, the'cam' adjusting screws for each feeder are located in a housing which is secured onthe top of the sinker cam-ring, andthe said screws which have inner and outer screw threaded parts of diiferent pitches, are connected by means of screw-threaded sleeves to and actuate approximatelyra'dial slides on the underside ofthe said ring, to which the beforementioned cams are attached. The cam-ring is not with this arrangement weakened inorder to accommodate the screws, and in cases where for example three or more adjustment screws are required in connection with each feeder, all the screws at each feeder can be conveniently located in one and the same housing.

Referring to the accompanying drawings.

Fig. 1 is a sectional side elevation, and

Fig. 2 a plan partly in section, ofthe cam.

adjusting means in connection with one feeder of a circular knitting. machine, constructed accordlng to our invention.

Fig. 3 is an inverted plan showing ad- ,jnstable cams.

Like letters indicate likepartsthroughout the drawings. Y i

In carrying'out cam adjusting screws A, B and C usually provided at each feeder, are disposed "in a housing 1) which issec'ured on the upper face i of thesinker cam-ring E, preferably by meansof 'two vertical screws F, (see Fig. 2) and three approximately radial slides G, .H and J, aredisposed in recesses in the underside of the said'cam ringdirectly under the this invention, the three 5 housing-D. The presser-cani K is secured to the middleslideI-I, and the sinker-cams L to .65 the two outer ones G and J.

Theslides G, H and J are connected to the screws A,-B and (1, and in order toprovide avery fine adjustment, a positive movement in both directions, and a release for the press- 0 er cam K the followin construction is ado tedQThe two outer screws A and C are provided at their outer ends with screw-threads which engage in screw-threaded holes in the housingD, and with a finer screwthread- 5' ed partat their inner ends, which engage withfscrew-threaded sleevesA and C which are also. mainly disposed in the housing 1).

The projecting ends of these sleeves A -and C are connectedto the cam slides G and J, bymeans of vertical studs G 5 which pass up through slots M in the cam-ring E, and are secured in holesprovlded for them in heads on the, projecting ends of the sleeves A and C? as shown. The connection described prevents the sleevesA and C from rotating with their respective screws A'and and t 'WlllbQ appreciated that the extent of the movement imparted to the cam-slides each revolution of the screws, isiin, the arrange- 99 ment .set forth. determined the ,dliference in the pitches of the twoscrew-threaded-portions thereon.

The presser ca m adjusting screw B, is connected to the p'resser cam-slide H by a similar arrangement to that described, the inner end of the sleeve B associated with therscrew B, being connected to the slide H by a stud H on the latter rising through a slot M in the camring E and engaging in ahole in the pro- 100 V I jecting end of the said sleeve, but in this case and in order that the presser cam K can be automatically put out of action, the outer screw-threaded portion of the adjustment screw B works in a screw-nut O which slides in a space provided for it in the housing D, and the said nut isheld in its inner end or normal position as shown in Figs. 1 and 2 by means of a pivoted catch-lev'erP, against the the "action of springs Q and T (see Fig; 1)

bothof which tends'to move the screw B and the cam slide H' outward. The catch lever P is pivoted at P to the housing D, and its upper end is connected to theordinary machine stop mechanism, and when this comes 7 intoaction owing to the failure of the thread,

the lever P is tripped, the sliding nut O is released, and the presser-cam K is moved back by the springs Q and T thereby obviating the pressing off of the work when the thread. fails or breaks.

If preferred springs T may be disposed on the sleeve A and C between their enlarged projecting ends and the inner ends of the opening in the housing in which they are disposed, and in this case they only serve to take up any lost motion.

' has the divisionsnotched, and a spring plungturned until the readings agree again.

er V is provided to engage in these notches and prevent thediscs R from rotating with the screw. The other outer discs S is connected to and rotates with the screw, and for this purpose it is formed with a sleeve S the latter has a longitudinal slot S and a projecting pins on the screw engages in this slot. This arrangement permits of the screw moving longitudinally without the disc and at the same time maintains the connection. Both d scs are held together close up to the housing and thus prevented from moving longitudinally on the screw by means or" studs W fixed in 'the'housing as shown in Figs. 2 V

and 3.

With-the arrangement describedpthe non-- rotatingnotched discs R can be set to the same reading as the discs which rotate with thescrews, and in making a readjustment of thesi nker cams, the notched discs R are. all turned t he same number of divisions, and each of the screws A and C is subsequently 7 With this arrangement the sinker cam-s at the re spective feeders can all be readjusted from time to time to the same degree without trial and with the minimum risk of error.

The inner discs R which is the larger of r What I claim as my invention and desire to secure by LettersPatent is 1. In a circular knitting machine, means for adjusting the presser and sinker cams comprising in combination a sinker cam ring, a housing secured on the upper face of the said cam-ring,a series of adjustment screws disposed in the housing said screws having screw-threaded parts engaging in the hous ing or parts disposed therein, and screwthreaded parts of a different pitch engaging in sleeves which are'connected to the respective cam-slides on the underside of the camring, substantially as described.

2. In a circular knitting machine, means for adjusting the presser and sinker cams according to claim 1, in which the screw actuated sleeves are connected to the cam-slides by means of vertical studs on the latter which pass up through slots in the cam-ring and have their upper ends secured in holes provided for them in the projecting ends of the said screw actuated sleeves, substantially as described.

3. In a circular knitting machine, means for adjusting the presser and sinker cams according to claim 1, in which the outer portion of the presser cam adjusting screw works in a screw nut which slides in the housing and said nut is held against the action of a cam withdrawal spring'or springs by means of a catch-lever which can be connected to and tripped by the machine stop mechanism whereby the screw-nut is released and the presser cam withdrawn by the action of the spring or springs, substantially as described.

4. In circular knitting machine presser and sinker cam adjusting means according to claim 1, providing each screw with two indicating discs engraved with the same number of divisions one of which is adapted to rotate with the screw Whilst the other is notched and is normally held by a spring catch but is angularly adjustable by hand i11- dependently of the screw for the purpose of facilitating the adjustment of the cams at different feeders all to the same extent, substantially as described.

In testimony thereof I have affixed my signature. 7

JOHN HENRY'GLENN BAYLES.

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