US2667266A

US2667266A - Yarn furnishing device

Info

Publication number: US2667266A
Application number: US191780A
Authority: US
Inventors: Manger Charles Frederick
Original assignee: Bentley Engineering Co Ltd
Current assignee: Bentley Engineering Co Ltd
Priority date: 1949-10-29
Filing date: 1950-10-24
Publication date: 1954-01-26
Anticipated expiration: 1971-01-26
Also published as: GB692424A

Description

Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5 Sheets-Sheet 1 Filed 001;. 24, 1950 Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5 Sheets-Sheet 2 Filed Oct. 24, 1950 c. F. MANGER 2,667,266

YARN FURNISHING DEVICE 5 Sheets-Sheet 3 F/G 3A.

Jan. 26, 1954 Filed Oct. 24, 1950 Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5 Sheets-Sheet 4 Filed 001;. 24, 1950 Inventor aw 114M 72 Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5 Sheets-Sheet 5 Filed Oct. 24. 1950 I nventor ml $51M By (MA-0Q Patented Jan. 26, 1954 YARN FURNISHING DEVICE Charles Frederick Manger, Leicester, England, assignor to The Bentley Engineering Company Limited, Leicester, England Application October 24, 1950, Serial No. 191,780

Claims priority, application Great Britain October 29, 1949' Claims.

This invention is an improved yarn furnishing device for textile machines and its chief object is a construction of yarn furnishing device which is particularly well suited for use, on circular knitting machines, for feeding elastic yarn (either covered or uncovered) to the needles, such yarn being either knitted by the needles or incorporated in the fabric withoutbeing knitted.

Unless special precautions are taken to avoid it, difliculty will .be experienced in incorporating or knitting elastic yarn in, tubular knitted fabric owing to the fact that, for various reasons, the yarn is not drawn off the bobbin or other wound supply with an even tension. To overcome this difficulty proposals have alreadybeen made for a yarn furnishing device comprising two rotary furnishing members which feed the yarn between them and of which one is movable. over the surface of the other in order to vary the rate of feed of the yarn according to their relative positions. .Such a device has included means for driving one of these members and a yarn tensioning device to tension the yarn before it enters between the furnishing members.

The present invention comprises a modified form of such a device and includes, broadly, the combination of a rotary furnishing disc, arotary furnishing roller cooperating with the face of the disc to grip the yarn, means for adjusting the roller towards and away from the center of the disc to vary the rate of yarn feed,.a pair of meshing gears for driving .the disc .a bracket mounted for movement towards and away from one of the gears, a spindle in the bracket carrying the disc and the other gear, and means to move the bracket in order to disengage the gears.

It is obvious that in place of a flat disc the same object can be achieved when that disc is replaced by a conical surfacagenerally a shallow conical surface. Where a disc is. referred to herein and in the claims it'is to be understood that such a conical surface is also included.

The foregoing and otherfeatures of the invention set out in the appended claims are incorporate-:1 in the yarn furnishing device which will now be described by way :of example with reference to the accompanying drawings in which:

Figure 1 is a front elevation and Figure 2 is a plan of the device:

Figures 3A and3B are sideelevations of the device, showing its driving connections .and the mechanisms for moving the gears out of mesh;

. Figure 4 is an oppositeside elevation of a portion of ,ths'device';

Figure 5 shows a modification to be made to the device for the purpose of feeding bare elastic.

The device shown in Figures 1-4 is primarily intended for use, in a circular knitting machine, for feeding covered elastic yarn. It comprises a support I housing a hollow driving-shaft 2 which for convenience in description will be considered as being vertical. This support I is adjustably fixed by a clamp 3 to a post 4 on the table or other convenient part 5 of the knitting machine. At its lower end the shaft 2 is provided with a bevel or other gear 6 by which it may be driven from a gear 1 on a running shaft 3 of the machine, and at its top end is provided with skew or helical gear 9 for a purpose hereinafter described.

At the upper end of the support I there is a clamp I0 carrying a fixed spindle H the axis of which is parallel to that of the vertical shaft 2. Pivotally mounted on this spindle l l for rocking movement is a bracket l2 carrying a horizontal spindle it having a disc [4 at one end and a helical gear l5 at the other. The gear 15 is driven by the helical gear 3 secured to the upper end of the vertical shaft 2.

The disc l4 constitutes one of the furnishing members and a roller l6 constitutes the other. the yarn being gripped between the surface of the disc and theperiphery of the roller. A ball bearing of the ordinary commercial type is used for the roller 16 and this is mounted on a pin 11 which is secured to a lever I8 carried by a screw it. The latter is screwed through the boss 20 of the bracket l2 and locked by'locknut 21'. The lever I8 is mounted on a plain part 22 of thescrew It; a spring 23 encircles its boss 24 and is anchored at one end by the screw 25 in the collar 26 also mounted on the boss 24-of the lever IS. The other end of the spring 23 engages a rod 21 which is fixed by a screw 28 in another boss 29 of the bracket 12. The spring 23 thus urges the roller it towards the disc M to create sufficient pressure to grip the yarn between the roller and the disc. The degree of pressure is adjusted by partial rotation of the collar 25 round theboss 24 of the lever 8 and by locking position with the screw .25.

The rate of feed of theyarn is adjusted by turning the screw is by means of its squared end 39, provided for this purpose, to bring the roller it nearer to, or farther from, the centre of disc M. The disc 14 rotates at a constant speed, be.- ing driven from the machine, andconsequently the yarn will be fed respectively slower or faster it the desired on a rod 32secured in a hole in the lever 18 by the screw 33 and consists of a pair of coaxial tension discs or cymbals 3 la, 3ib between which the yarn passes and which are pressed together by the spring 34, the pressure of which is adjustable by moving the collar 35 along the'rod 32.

In order to interrupt the drive of the furnishing disc I4 when it is desired to stop the elastic feed the two helical gears 9 and I5 are thrown out of mesh. For this purpose the hollow shaft 2 contains a push rod 36 the top end of which bears against a head 31 on one arm of the bell-crank has its other arm engaged, through the adjusting screw 39, with a face of the fixed clamp l8. Thus when the control cam 48 (Figure 3B), acting through-the levers 4i and 42 on the shaft 43, raises the push rod 36, the bracket i2 is swung about the spindle H and disengages the gears. The spring 44 urges the gears into mesh and the extent to which they mesh is adjusted by the screw 45.

When the yarn furnishing device is being used to feed uncovered elastic yarn, it is desirable to release the grip exercised on the yarn by the roller l6 and the furnishing disc l4 as the drive of the disc is interrupted. For this purpose the modification illustrated in Figure 5 is made. The rod 21 is removed and replaced by a rotatable rod 46 having a flat face 41 and the lever 18 is provided with a tappet screw 48 which bears against the flat face 41 on the rod 46 which is rotatably mountedin the boss 29. The arm 49 is attached by a screw 5|] to the rod 46 and a rigid strut or abutment in the form of a push rod 5| engages the arm-49 at one end and an abutment 52 on the support I at the other. A spring 53 mainpivoted for movement about an axis parallel with the axis of one of the gears, a spindle in the bracket carrying the disc and the other gear, and means for rocking the bracket in order to disengage the gears.

3, A yarn furnishing device according to claim 2 in which the gear having its axis parallel with the pivotal axis of the bracket is the driving gear, and the other gear carried by the disc spindle is the driven gear.

4. A yarn furnishing device according to claim 1, in which the roller is also carried by the bracket that carries the disc.

5. A yarn furnishing device according to claim 1, having the roller also carried by the bracket that carries the disc, and having means for tensioning the yarn before it enters between the disc lever 38 which is pivoted on the spindle l3 and tains contact between the push rod and the arm 7 and the abutment and when the bracket l2 rotates about the spindle II to disengage the disc driving gears the boss 29 carrying the rod 46 moves toward the support I and so, through the action of the push rod 5| on the arm 49 the rod 46 is caused to rotate. The latter therefore acts on tappet screw 48'and swings lever 18 about pivot screw i9 so as to lift the roller 15 away from the surface of the disc l4.

Preferably, but not necessarily, the gears 9 and I5 are concealed by a cover 54 mounted on the bracket l2.

What I claim is:

1. A yarn furnishing device comprising the combination of a rotary furnishing disc, a rotary furnishing roller cooperating with the face of the disc to grip the yarn, means for adjusting the roller towards and away from the center of the disc to vary the rate of yarn feed, a pair of meshing gears for driving the disc, a bracket mounted for movement towards and away from one of the gears, a spindle in the bracket carrying the disc and the other gear, and means for. moving the bracket in order to disengage the gears.

2. A yarn furnishing device comprising the combination of a rotary furnishing disc, a rotary furnishing roller cooperating with the face of the "disc to grip the yarn, means for adjusting the roller towards and away from the center of the disc to vary the rate of yarn feed, a pair of meshing gears for driving the disc, a bracket and roller supported in fixed relation to the roller whereby both the roller and the tensioning means are moved in company as the bracket is moved.

6. A yarn furnishing device according to claim 1, having means to adjust the pressure between the roller and the disc. 7

'7. A yarn furnishing device according to claim 1, having means to adjust the pressure between the roller and the disc which pressure adjusting means is supported from the bracket.

8. A yarn furnishing device according to claim 1, combined with means for tensioning the yarn before it enters between. the disc and roller, and means to adjust the pressure between the disc and roller, and having means pivotally mounting said bracket for movement towards and away from one of the said gears, wherein the disc, roller, yarn-tensioning meansand pressure adjusting means are all supported by the said bracket and are movable in company about the pivotal axis thereof.

9. A yarn furnishing device according to claim 1, combined with means to separate the furnishing disc and roller as the gears are disengaged.

10. A yarn furnishing device according to claim 1, combined with means to separate the furnishing disc and roller as the gears are disengaged, said means comprising a lever pivoted on the bracket and carrying the roller, and means operatively connecting the lever with another part of, the device and so located that as the bracket is swung about its pivot the lever is moved to separate'the roller from the disc.

11. A yarn furnishing device according to claim 1, combined with a lever pivoted on the bracket and carrying the roller, a rotatable camming member supported in the bracket, means operatively connecting the camming member with the said lever, and a rigid strut engaged between a fixed part of the device and the camming member on one side of its axis of rotation whereby as the bracket is swung the camming member will be turned to move the lever and carry the roller away from the disc.

12. A yarn furnishing device comprising the combination of a rotary furnishing disc, a spindle carrying said disc, a rotary furnishing roller for cooperating with a surface of the disc to furnish yarn, a spindle carrying said roller with the axis-of the spindle disposed in a plane transverse to that containing the axis of the disc spindle, means to adjust the position of the roller lengthwise along its spindle thereby to adjust the roller towards or away from the center of the disc, said meanscomprising a lever having one end mounted on'the spindle with the roller mounted thereon at a distance from the spindle, a pair of meshing gears for drivingthe disc one of said gears being mounted on the disc spindle, and a bracket which supports the disc spindle, which is pivotally mounted to swing about an axis transverse to that of the said disc spindle, and which also supports the roller spindle, whereby the gear carried by the bracket, the disc and the roller are movable in company as the bracket is turned about its axis.

13. A yarn furnishing device according to claim 12, combined with means for tensioning the yarn supported on the lever which carries the roller.

14. A yarn furnishing device according to claim 12, combined with a camming means rotatable about an axis substantially parallel with the axis of the roller spindle, means on the said bracket adapted to engage the camming means an arm extending laterally from said camming means, a rigid abutment engaged between the said arm and a fixed portion of the device and so located that as the bracket is swung about its axis the fixed abutment serves to turn the camming means and thereby to move the roller-carrying lever away from the disc.

15. A yarn furnishing device, comprising a rotary furnishing disc and a rotary furnishing roller cooperating with the face of the disc to grip the yarn, an adjustable tensioning device for applying tension to the yarn before it enters between the roller and disc, means for adjusting the roller towards and away from the center of the disc to vary the rate of yarn feed and for moving the tensioning device as the roller is thus moved, a pair of meshing gears for driving the disc, means for moving the gears out of mesh to interrupt the drive, a bracket'pivoted for movement about an axis parallel with the axis of one of the two gears said one gear being a driving gear, a spindle in the bracket carrying the disc and the other gear said other gear being a driven gear, and means for rocking the bracket to bring the driven gear out of mesh with the driving gear.

CHARLES FREDERICK MANGER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 577,906 Wohlgemuth Mar. 2, 1897 1,518,720 Wilkinson Dec. 9, 1924 2,123,174 Lindley July 12, 1938 2,207,464 Lawson July 9, 1940 2,318,998 Ingalls May 11, 1943 2,432,685 Sawyer Dec. 16, 1947 2,539,527 St. Pierre Jan. 30, 1951 FOREIGN PATENTS Number Country Date 342,297 Great Britain Jan. 26, 1981