US2365667A

US2365667A - Thread holder driven from take-up roll

Info

Publication number: US2365667A
Application number: US533365A
Authority: US
Inventors: Walter H Wakefield
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1944-04-29
Filing date: 1944-04-29
Publication date: 1944-12-26
Anticipated expiration: 1961-12-26

Description

Dec. 26, 1944.

,w. H. WAKEFIELD THREAD HOLDER DRIVEN FROM TAKE -UP ROLL Filed April 29, 1944 ends and draw them between the gears. positive driving connections exist between the thread gears and the small roll it is desirable Patented Dec. 26, 1944 UNITED" STAT ES PATENT OFFICE THREAD HOLDER DRIVEN FROM TAKE-UP ROLL Walter H. Wakefield, Worcester, Mass., assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application April 29, 1944, Serial No. 533,365

11 Claims.

This invention relates to improvements in thread holder mechanisms for weft replenishing looms and it is the general object of the invention to provide means by which a roughened or friction cloth engaging surface of the take-up velops in their weft ends and it is desirable to take up thisslackness to prevent the weft ends from being broken by the lay. A form of thread holder for this purpose which has gone into general use employs a pair of weft .end engaging gears which mesh with each other and turn in such directions as to draw the weft ends away from the bobbin magazine and keep them taut- The thread gears should preferably rotate at a slow rate and continuously throughout loom operation not only for the purpose of taking up the aforesaid slackness, but also to take up any 2 slackness in the weft ends which results from rotation of the bobbins on their axes in the magazine caused by loom vibration.

The take-up roll of a loom generally operates at a slow rate which is more or less proportional to the rate at which replenishing operations occur due to the relationship between the size of the weft, the number of picks per inch in the fabric advanced by the take-up roll, and the fact that coarse yarn requires replenishment more frequently than does fine yarn. It is an important object of my present invention to provide driving connections between the thread gears of the thread holder and the take-up roll, the driving connections preferably including a small roll held against the friction surface of the take-up roll and caused by the latter to turn for the purpose of operating the driving connections.

The take-up roll is ordinarily mounted to rotate in bearings projecting forwardly from the front of the 100m, and when the take-up roll is in high position its bearings are mounted on the breast beam. It is a further object of my present invention to mount the aforesaid small roll on the take-up roll bearing adjacent to the magazine in such manner that it will be held against the take-up roll by resilient means which is yieldable to compensate for any irregularities in the surface of the take-up roll.

After fresh bobbins have been placed in the magazine it is customary for the operator to la;

the new weft ends over the thread gears and then spin or turn the latter manually to tighten the When 'Payne No. 1,842,731.

that the latter be able temporarily to move out of driving relation with the take-up roll to permit,

manual turning of the gears. It is another object of my invention to provide a resilient or yielding mounting for the aforesaid small roll so that the latter can move out of driving engagement with the take-up roll when acted upon by a rotary force transmitted through the driving connections from the thread gears when the latter are turned manually.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is adiagrammatic plan view of a loom having my invention applied thereto,

Fig.- 2 is an enlarged vertical section on line 2-2 of Fi 1,

Fig. 3 is a plan view of the structure shown in Fig. 2,

Fig. 4 is a vertical section on line 4-4 of Fig. 3, and

Fig. 5 is an enlarged vertical section on line 5-5, Fig. 1.

Referring particularly to Fig. 1, I have shown a weft replenishing 109m frame I!) having a breast beam H and a lay l2 which reciprocates under a magazine 'M which holds reserve bobbins B, four stacks of bobbins being indicated in Fig. 1. From these reserve bobbins extend weft ends W to a thread holder mechanism designated generally at H.

The loom includes in its construction cloth take-up means comprising a roll or cylinder l5 over which extends the fabric F being woven. The take-up roll in the present instance is in high position and is supported on bearings extending forwardly from the breast beam. In Figs. 1, 2 and 3 one of thesebearings is shown at It with its bearing cap H to receive the gudgeon l8 of the take-up roll. The latter is turned in the direction of arrow (1., Fig. 2, during loom operation bywell-known mechanism not shown.

The thread holder H has front and back meshing thread engaging gears or geared members l9 and 20, respectively, which may be mounted on the holder as shown, for instance, in patent to It is thought sufiicient for the present purposes to state that the gears l9 and 20 are caused to rotate in such a direction as to tension the weft ends W which pass downwardly between them, and that these gears mesh with each other so that the driving of one of them causes rotation of both.

The matter thus far described may be constructed and operated in the usual manner.

In carrying my present invention into effect I provide a train of driving connections or mech- ,2 I 2,865,667 l anism which transmits a rotary force from the mounted thereon a clamp 6| through which the friction or roughened cloth engaging surface 2| sheath 38 of the flexible shaft extends. The of the take-up roll 15 to the forward-- gear I! clamp 6| has two upwardlyextending arms 62 of the thread holder H." The surface -2| may be one of which is shown in Fig. 5. These arms made of sandpaper, burred sheet metal, or the 5 are drawn together :by any suitable means desiglike, and rotates about the axis of the take-up nated at 63 so that the sheath will be held tightly roll as the latter turns duringloom operation. ,to the support 50 by the clamp 6|. The latter to advance the cloth as it is woven. A stud 25 has a flange 65 which may be secured in any apis screw threaded at 26 into bearing l6 and is proved manner to the plate 60. The structure held in position by check nut 21. The stud-25 shown in Fig. 5 may be similar to that shown in is substantially parallel to the take-up roll and is my co-pending application Serial No. 532,093,

located below and to the rear of the latter as filed April 4. indicated in Fig. 2. In operation, the fabric F is moved forwardly The stud extends beyond the adjacent end by rotation of the take-up roll I5 and the latter of the take-up roll and has mounted thereon "a causes turning of the small roll 32 in a clocklever 28 the lower end of which'is provided with wise direction as viewed in Fig. 2, thus turning a hub 29 rotatable on the stud. Thelever exthe stub shaft 3| and core 36 of the flexible shaft tends upwardly and has a bearing 30 in which in such a direction as to cause thread gear l9 rotates a stub shaft 3|. That end of shaft 3| to-turn in the proper direction to tension the remote from the b'earinglfi has secured thereto weft ends W. As shown in Figs. 2 and 3 the rotary means, such as a small friction roll 32, take-up roll I5 is approximately two and onewhich is made of any suitable material having half times the diameter of the roll 32, but I am preferably a rough or deformable surface for not limited to this relationship, inasmuch as a the purpose of establishing frictional driving smaller roll can be employed if it is desired to conditions with the take-uproll surface 2| so turn the thread gears l9 and 20 at a faster that the latter will cause rotation of the small rate. ,roll. Thus, the small roll 3211'133' be covered After placing fresh bobbins in the magazine it with felt, rubber, leather, sand, or like material, is customary for the operator to turn the thread which will cooperate with the take-up roll surgears manually to tighten thenew weft ends and face to effect turning of ro 530 draw them between the thread gears. If roll 32 That end of stub shaft 3| adjacent to the were on a fixed axis it would be held against robearing l8 projects beyond bearing and has tation by the take-up roll and prevent manual tapered screw threads 33 which receive a simturning of gears l9 and 20. Underusual runilarly tapped nut 34. The tapered end of the ning conditions the spring 39 holds the surface stub shaft is split as at 35 so that tightening of of roll 32 against the take-uproll firmly enough nut 34 Will clamp the split parts of the end of to press the sand or other projections on roll IS the stub shaft against the core 36 of a. flexible against and in close engagement with the small shaft designated generallyat 31 and including in roll 32 to establish a frictional driving contact its construction a sheath 38. The core 36 is thus between the rolls. When gears l9 and 20 are caused to rotate Whenevershaft 3| turns in the -Oturned manually at a rate faster than normal a bearing 30. rotary force is transmitted back through the In order to insure engagement of the roll 32 flexible shaft 3'! to roll 32 and the latter moves with the roughened surface 2| of the take-up a slight distance away from the take-up roll and roll I surround stud 25 with a to sion Sp i g- 9 out of its previous close driving relation with having one end 40 thereof extending .into thug-' roll I 5. This slight movement is permitted by hearing l6 and having the other end 4| thereof spring 39, but after the operator has completed extending into the hub. 29 of leverv 28.. This turning of gears l9 and 2B, the spring again respring tends normally to hold lever 28 to the stores normal driving relation between'the rolls. left as viewed in Figs. 2 and 4 to maintain driv- From the foregoing it will be seen that I have ing connections between rolls l5 and .32. Hub; provided simple means by which the thread 29 is held by the spring against a. collar 42 adgears 9 and 20 of the thread holder may be justably held to the inner end of stud 25 by means driven from the roughened or friction surface of of a set screw 43. A clip formed as. indicated the cloth take-up roll of a loom. The train of in Figs. 2 and 3 may be held to the breast beam driving connections between the take-up roll by means of a screw 45 and-extends around the and the thread gears includes a small roll held sheath 38 to hold the latter to thebreastbeam. against the surface 2| of the take-up roll and The flexible shaft extends as indicated in Fig. 1 caused to rotate by the latter for the purpose f preferably through the magazine .M and has its turning the core 36. of the flexible shaft. The outer end attached to the front thread gear I9. latter in turn is connected to one of the mesh- One manner of attaching the fieXi-bleshaft to ing thread gears and it is in this manner that gear I!) is indicated in Fig. 5. The threadholder the slow but continuous rotation of the take-up includes a support Silhaving a bearing-5| in roll l5 causes uniform turning of the thread which rotates a short shaft .52 to the right end de ge r du 0 operation to take up of which, see Fig. 5, the front thread engagi slackness in the weft ends resulting either from ggar. 19 is Secured in a manner similar; t t t replenishing operations or rotation of the bobset forth in the aforesaid Payne patent. The biIlS- The Spring 39 a o y e s o per it ma ua left end of shaft 52 has atapered thread is turning of a s I 9 and 0 y t e operator when and is split as at 54. A nut 55 liavin a tapered bobbins a p a d n t e ma azine.

thread fits around the tapered screw/threads 53 Having t d s i ed my invention it will be and when tightened'forces the split endof shaftrio a c an es and modlficationsmal b 52 against the core 3fi of. the'flexibleshaft, the

made therein by those skilled in the art without core extending into the shaft 52 for this purpose. departing from the Spirit and Scope of the nve The core 36 is thus secured at .its twoendsby tion and I do not wish to be limitedto the desimilar means to the shafts 3| and 52, tails herein disclosed, but what I claim is: v

A plate 60 secured to the support 50 113.3 15. 1. In a'weft replenishing 'loom havinglres'erye bobbins from which weft ends extend, a cloth take-up roll having a friction surface rotating during loom operation, meshing geared members between which the weft ends extend and rotatable to tension the latter, rotary means engaging said friction surface and rotated thereby as said surface rotates, and driving connections between said rotary means and geared members causing the latter to rotate to tension said weft ends whenthe rotaryln eans rotates:

2. In a weft replenishing loom having meshing thread gears rotatable to tension the weft ends of reserve bobbins, cloth take-up means rotating during loom operation and having a friction surface turning therewith, a roll engaging said friction surface and caused thereby torotate as the take-up means rotates, and driving connections between said roll and said thread gears causing the latter to turn to tension said weft ends as the roll is rotated by said friction surface.

3. In a weft replenishing loom having meshing thread gears rotatable to tension the weft ends oif reserve bobbins, cloth take-up means having a friction surface rotating therewith during loom operation, face engaging said a roll having a friction surfriction surface of the takeup means, said friction surfaces cooperating to cause rotation of said roll as the take-up means rotates, and driving connections between said roll and gears to rotate the latter to tension said weft ends as the take-up means rotates.

4. In a weft replenishing loom having meshing thread gears rotatable to tension the weft ends of reserve bobbins, cloth take-up means having a friction surface rotating therewith during loom operation, a roll engaging and-rotated by said friction surface as the take-up means rotates, and a flexible shaft connecting said roll to one of said thread gears to cause the latter to turn to tension said weft ends as said roll rotates.

5. In a weft replenishing loom havingmeshing thread gears rotatable to tension the weft ends of reserve bobbins, cloth take-up means rotating during loom operation and having a friction surface turning therewith, a lever pivoted with respect to the loom, a roll on said lever, means acting on said lever holding said roll against said friction surface to cause the latter to rotate said roll as the take-up means rotates, and driving connections between said roll and thread gears causing the latter to turn to tension said'weft ends as the roll rotates.

6. In a weft replenishing 100m having meshing thread gears rotatable to tension the weft ends of reserve bobbins, cloth take-up means having a friction surface, rotating therewith during loom operation, a lever pivoted with respectto the loom, a roll on said lever, means acting on said lever holding the roll against said friction surface to cause the latter to rotate said roll as the take-up means rotates, and a flexible shaft connecting said roll to one of said thread gears to cause the latter to turn to tension said weft ends ,as said roll rotates.

7. In a weftreplenishing loom having meshing thread gears rotatable to tension the weft ends of reserve bobbins, a cloth take-up cylinder having a friction surface rotating about the axis of said cylinder as the latter rotates during loom operation, a bearing -for said take-up cylinder, a stud on said bearing parallel to the axis of said take-up cylinder, a lever pivoted on said stud, a roll rotatable on said lever, resilient means acting on said lever to hold the roll against said friction surface and causing the latter to rotate said roll as the take-up cylinder rotates, and drivil'lg connections between said roll and gears causing the latter to turn to tension said weft ends as said roll rotates.

8. In a weft replenishing loom having meshing thread gears rotatable to tension the weft ends of reserve bobbins, a cloth take-up cylinder rotating during loom operation and having a friction surface turning therewith about the axis of the cylinder, a bearing for said take-up cylinder, a stud. on said bearing parallel tothe axis of said take-up cylinder, a lever pivoted on said stud, a roll rotatable on said lever, resilient means acting on said lever to hold the roll against said friction surface to cause the latter to turn said roll as the take-up cylinder rotates, and a flexible shaft connecting said roll to one of said thread gears to cause the latter to turn to tension said weft ends as said roll rotates.

9. In a weft replenishing loom having meshing thread gears rotatable to tension the weft ends of reserve bobbins, a cloth take-up cylinder having a friction surface rotating about the axis of the cylinder during loom operation, a bearing for said take-up cylinder, a stud on said bearing parallel to the axis of said take-up cylinder, a lever pivoted on said stud, a roll rotatable on said lever, a, torsion spring surrounding said stud and connected to said bearing and lever and acting on the latter to hold the roll againstsaid friction surface, thereby causing the latter to turn said roll as the take-up cylinder rotates, and driving connections between said roll and gears causing the latter to turn to tension said weft ends as said roll rotates.

10. In a weft replenishing loom having meshing thread gearsrotatable to tension weft ends of reserve bobbins, cloth take-up means rotating during loom operation and having a friction surface turning therewith, a roll engaging said friction surface, yieldable means normally holding said roll in driving engagement with the friction surface to cause the latter to turn the roll as the take-up means rotates, and driving connection between said roll and gears normally turning the latter to tension said weft ends as the take-up means rotates, said. means being caused to yield to permit said roll to move out of driving engagement with said friction Surface by a rotary force transmitted through said driving connections and permit said roll to turn independently of said friction surface when the gears are turned manually.

11. In a weft replenishing loom having meshing thread gears rotatable to tension weft ends of reserve bobbins, cloth take-up means rotating during loom operation and having a friction surface turning therewith, a roll engaging said friction surface, yieldable means normally holding said roll in driving engagement with the friction surface to cause the latter to turn the roll as the take-up means rotates, a flexible shaft connecting said roll to one of said gears and normally turning the latter to tension said weft ends as the takeup means rotates, said means being caused to yield to permit said roll to move out of driving engagement with said friction surface by a rotary force transmitted through said flexible shaft and permit the roll to turn independently of said friction surface when the gears are turned manu ally.

, WALTER H. WAKEFIELD.