US1374417A - Stop-motion - Google Patents

Description

G. M. ARRAGG.

STOP MOTION. APPLICATION FILED MAY 7, 1919.

1,874,41 7, I Patented Apr. .12, 1921..

2 SHEETS-SHEET 1.

INVENTOR.

B Y /%w MZW A TTORNE Y. I

G. M. ARRAGG.

STOP MOTION.

APPLICATION FILED MAY7,1919.

1,374,417. Patented Apr-12,1921.

2 SHEETS-SHEET 2.

I N VEN TOR.

iwyzw W ATTORNEY.

FF-IC.

' GEORGE M. ARRAGG, OF LAWRENCE, MASSACHUSETTS.

STOP-MOTION.

ava-e17.

Specification of Letters Patent.

Patented Apr. 12,1921.

Application filed May 7, 1919. Serial No. 295,302..

To all whom it may concern:

Be it known that'I, GEORGE M. ARRAGG, a a citizen of Turkey, residi n at Lawrence, in the county of Essex and tateof Massachusetts, have invented certain new and useful Improvements in Stop-Motions,of which the following is a specification.

This invention relates to stop-motions for s innin frames and is articularl an improvement on the device shown in patent to me of January 18, 1916, No. 1,168,457.

On a cap spinning frame, where such device is especially useful, there are'usually one hundred spindles on each side, and one spinner takes care of three sides or three hundred .spindles. Empty bobbins are placed on the spindles on one side and all are started together and are run until full, when all are stopped together. Thereby all have practically the same amount of yarn, except those whose ends have broken,

There must be sufiicient clearance between the delivery rolls and the cap and bobbin to allow for dofiing, but the guide eye for the yarn must be directly over the axis of the cap and bobbin and fairly near the top thereof to prevent the yarn from stretching and breaking. With my device, I prefer that the guide eye should be-carried by'the rocking member, which must therefore be arranged so that it can be lifted enough for dofiing. Its back end or tail must be capable of sidewise motion between the vibrator and the flexible member.

When piecing, the tail of the rocking member should .be held up away from the vibrator, and it is desirable that it should be held up as soon as the stop-motionhas acted. It is desirable that all the tails should be held up when the frame is stopped .or slowed down to prevent the vibrator from acting and thus breaking the ends, or, that p'rovisionshould be made so that the vibrator should stop just before the delivery rolls and spindles stop.

When a strand of roving breaks, it is desirable that delivery of its end should cease and that an unskilled operator should be able to rapidly and easily start and piece such ends and reset the stop-motion with-. out exercising much care.

It s my .purposeto provide means where-v by when an end does break, as is most common, between the delivery rolls and the bobbin, the stop-motion willact automatically to firmly and gently hold the roving,

gchine.

not to cut it, at the back rolls so that it will break ust back of the delivery rolls, and so that the operator can, with one movement, start delivery, then piece the ends, and by anothermovement reset the stop-mot1on for the next break, or, as will be explained, so that he can ignore the broken end until the frame is doffed.

Especially on fine Work or when there is much vibration to the mill or machinery,- and in any case for the best operation of such frames, the-rocking member should not chatter nor rock beyond certain limits until an end breaks, or it will be struck by the vibrator and the stop-motion mechanism will act to unnecessarily stop delivery, but it should be certain to tip when an end 'does with the doffing, and I make the lifting plate of such form that the roving will break just behind the front rolls.

\ In the drawings, Figure 1 is a diagrammatic side elevation of my device in place on a cap splnnlng frame of well known type,

the parts being shown in the running pos1t1on and the rocking member being shown as one-piece. Fig. 2 isa side elevation in detail showing a two-part rocking member, with the carriage for setting, vibrator and other parts in the position which they .assume after an end is broken, the tail of the rocking member has droppedand has beenpushed over by the vibrator, releasing the flexible member and the leaf spring. Fig. 3 is a .plan view of Fig. 2. Fig. 4 is a side elevation of the carriage and adjoining parts in the position assumed when the carriage is'pulled forward for setting. Fig. 5 is a plan View of Fig. 4. Fig. 6 is a. front elevation of another form of guide'eye, and

Fig. 7 isa side elevation of'Fig. 6. Fig. 8 is a sideelevation of another form of guide eye. Fig. 9 is a .detail in perspective of a slightly modified form of padded roll" separating means. Fig. 10-is a detail showing the leaf spring retaining hook from the front.

A represents the frameof. a spinning ma- B represents-the cap, G thebobbin, F and G the back-drawing rolls, H the top carrier rolls and M the bottom carrier rolls, K and L the front drawing rolls all substantially of usual construction, and N represents the roving from the roving spool.

The bottom back drawing roll G is positively driven by any usual means as is also the bottom front drawing roll L. The top front drawing roll K maybe of any usual construction. For each strand or plurality of strands of roving which are to be twisted into a single end, I use a separate top back drawing roll F. Each is carried by a hanger 20 slidable through a hanger frame 21. Through each hanger 20 passes a hanger pin 22 into frame 21, the. hanger being slidable thereon. Around pin 22 between hanger 20 and an adjusting nut 23 is a back roll spring 24 which tends to keep the top back drawing roll F in engagement with the bot tom back drawing roll Gr, whereby the yarn or roving N will be drawn in and delivered in the usual manner.

Fixed to any suitable rail or bar 30 fixed to the frame of the machine are one or more L shaped plates 31, each with a horizontal shelf 32. For each back top roll F, I provide a lifting plate 33 pivoted to 31 with its free end at a point between rolls F and G not touching either. The roving N passes between the end 34 of this lifting plate and;

top roll F.

A compression spring 35 between liftingplate 40 with a slot 41 andashoulder 42 ber 44 which may be a chain or wire ropewhich projects thereinto. A flexible memis fastened at one end to the bottom of lifting late 33 and extends downward therefrom, preferably through lifting plate spring 35, and through shelf 32 downward through slot 41 thence at a substantially sharp angle backward to abar or shaft 9 attached to the frame where the other end is fastened.

T ransversely of the machine approximate to and preferably under the stretcher plates 40,

I place a vibrator rod 50 which carries fingers 51 which extend upward and preferably partly over each stretcher plate 40 in proximity to the member 44 and under the end of a rocking member. This vibrator 50 is moved back and forth continually .by any suitable means.

The shoulder 42. is at the front of .the slot 41 and on the side adjoining the vibrator finger. As the back end of flexible member 44 is fixed, it is manifest" that if it is .pulled forward and caught over shoulder 42, it will pull downward lifting plate 33 wherein it is separated from the bottom roll and moreover the. roving end will be pinched between the end 34 of the lifting plate and the surface of. the top roll F and so held that the pull of the front rolls. K and L will break it between the front and back rolls.

As shown in Fig. 1', I may use a onepiece rocking member 0 pivoted to the frame at 61 having-a light front part 14 terminating in the thread.guide at 19 between the front delivery rolls and the cap of the bobbin, and a heavier back part 10 which extends back beyond the flexible member 44 and the shoulder 42: The back part 10 is so placed with reference to the vibrator finger 51 that, if the front part 14 is not held down, the back part 10 by its own weight will drop in front of 51 andyas the pivot for my rocking member is so madethat it can rock vertically and therear part can also move horizontally, whenstruck thereby, it will be moved overthe shoulder 42 pushing member 44 off therefrom in a manner similar to that described in my aforesaid patentg This rocking member is so placed and balanced that the action of the roving passing down from. the front rolls to the bobbin will depress the front end and raise the back end above the path of-fingers 51 as shown clearly in Fig. 1.

I find that by forming the thread guide so that the roving N will be given a'double bend out of a straight course, the tendency.

of the rocking member to chatter is overcome, and I consequently so form my guide eye as to depress the front end of the rocking member while the roving is being wound or spun on the bobbin and to keep it steadily depressed.

. AS shown in Fig. 2, I prefer, however, to enlarge the back end of the front part 14 at 12 and to form a slot therein to receive the tail 13 forming the front end of back part 10 which is so pivoted at 11 thatitcan move horizontally and can be raised independently of the front part. Normally, however, they are in alinement and if either is depressed the other'is elevated. I prefer the top and bottom back rolls, the guide eye 7 I and free end of the rocking member is depressed bythe pull of the roving, the back its;

and forth according to the length of the v fiber operatedon, I-also prefer to form in nearly behind the front delivery rolls as this reason that I introduce part 10 is raised above the vibrator 51 and the machine keeps on running until the end be pinched but not cut at the back rolls so that it will break just behind the front rolls whereby, when the frame is again started, it will automatically feed itself through the front rolls, and to accomplish this I provide a pad 36,-preferably of leather or similar yielding material, on the front edge of the lifting plate'where it comes in contact with the top back roll.

As the lifting plate must be moved back the bottom shelf 32 thereof an extension with a relatively long curved bearing trumpet 37 whereby the flexible member, which is shown as a wire 44, 'can easily run through without turning any sharp corner.

My attachment is for the same purpose as the aforesaid patent but, as the usefulness of such stop-motions is not only for saving waste and saving labor but for such automatic action on all kinds ofstock that little slanted fromfront'to back toward the'shoulskill or intelligence is required from the operator, I have devised the improvements described herein..

A simple straight guide eye will work satisfactorily with coarse yarns and where there is lit le vibration, but with fine yarns, or where there is vibration, there is a tendency for the rocking member 0 to, chatter or shake out of position, thus stopping the delivery rolls when not desged. It is for e double bend in the guide attached tothe front part of the rocking member.

When a strand of roving breaks, it is usually between the bobbin and the delivery rolls, and .for convenience in piecing up the broken end it is desirable that not only should the back top roll be lifted, but that roving should be automatically broken as possible. For this reason I introduced thepadded edge 36 on the lifting plate 33. This padded edge holds the stock at that point but does not cut it andfas the distance between the front and back rolls is adjusted.

to be slightly more than the length of the fiber, the roving is gently pulled apart-betweenthe front rolls and the forward carrier rolls just behind the nip of the front rolls.

When an end breaks, the drag on. the guide eye ceases, and, the weight of the back part of the rocking member causes it to in front of the vibrator whereby the dro flexible member is released. I find it desirable to immediately return the parts to their running position before the broken end is pieced. For this purpose I use a hook 91 fixed to the stretcher plate 40 outside of the shoulder 42 and to pivot a leaf spring 90 on a pivot 92 at the back of the, stretcher plate in such manner that it can move horizontally from side to side under the car-.

riage 71 and so that its front edge can be caught under hook 91.

' In this leaf spring 90 1' provide a forward 1 and back slot 93 which is relatively narrow and which, in one position partly registers with the slot 41 in the stretcher plate, and the forward part of which in another position registers with the shoulder 42. This slot 93 is relatively narrow and through it extends the flexible member 44. I may provide an extension, shown at 94, which is integral with the frontof the spring extending under the back part 10 of the rocking member in whatever position the spring may be.

The bottom of the carriage is so cut away that this spring can move horizontally from right to left and the spring is sopositioned that, when the flexible member rests against shoulder 42, one edge of it will be under or over hook 91.

The front edge 72 of carriage 71 may be der 42 and hook 91, or the parts may be so positioned that the two ends of the flexible member 44 will be approximately in a plane extending back of hook 91. In either case, when carriage 71 is pulled forward, as shown in Fig. 4, .the flexible member .is

forced over on to shoulder 42, and the front sideof spring 90 is forced down and over so as to be caught under hook 91. When carriage 71 is pushed back spring 90 is therefore caught and held until an end breaks, allowing 10 to drop in front of the vibrator which pushes it over, also pushing over flexible' member 44 from the shoulder 42, and

this carries with it spring90 which is re-' leased from 91, upon which its front end 94 springsup, lifting tail 10 up out of the way of the vibrator and allowing'the guide eye to drop back into the running' position whereby the broken end can readily be pieced. This arrangement prevents breakage and clears the back part of the rocking member from being struck by the vibrator until such time as the operator gets around to piecing the ends,

When the operator is ready to piece the end, it is necessary. only to pull forward carriage 71, which has a raised part 74' under 10 of such height thatit holds up that part 10 when the leaf spring 90 is depressed. The carriage is pulled forward by means of handle 7 0, thus bringing all parts to the running position, upon which the back rolls start delivery and the broken end is automatically fed through the front rolls and pieced by the operator.

When so pieced, the operator should push back handle 7 O and carriage 71 to allow the trigger mechanism to work but, if he fails so to do, the frame continues to run as if my attachment were not there.

I prefer to make my rocking member 0 in two parts pivoted so that the back is heavier, as the space in such machines must necessarily be limited and, in removing the cap and spindle, it is necessa-ry to lift the front part for clearance.

I also prefer to use a lifting bar, such as 8, running the length of the frame under the back parts of the rocking members with suitable devices, permitting it to be lifted just before the frame as a whole is to be stopped to prevent the back parts dropping as the speed decreases, unnecessarily breaking ends.

may use the form of guide eye shown in Figs. 6 and 7, wherein a well known form of guide eye so slants at an angle with the vertical instead of slanting horizontally, that it gives a double bend to the roving.

I prefer the form of thread guide shown in Figs. 1 and 2, wherein the guide eye proper 19 is of the usual form, but at 17 a vertical arm extends from the front part 14 and is bent over at 18 so that the double large number of machines while they are running. In fact, the necessity for spinners bend is made between 18 and 19.

In Fig. 8, I show still another form of guide eye, wherein the front part 130 of the rocking member 0 is bent around horizontally at- 131 to form a spiral guide eye and then extends upward and forward at 132, being again bent at 133 to give the roving end the doublebend desired.

If there is no stop-motion, the roving winds up on one of' the front rolls which continues to run, forming what is known as lap waste or else the broken end runs on to an adjoining bobbin, thus making double spinning and imperfect yarn.

In some mills, the broken ends are pieced after the lap waste has been removed, while in other mills the roving 1s broken by the operator behind the back rolls.

Where the first method is used, more production is obtained but there is likely to be a flaw in the yarn where it is pieced. Where the second method is used, that particular bobbin is put out of action, and no more yarn is spun on it until it is dofl'ed, but what yarn has been spun is more perfect.

In either case, the operator must be constantly on the alert and must be continually piecing ends or breaking the yarn, behind the back rolls. A serious objection to breaking the yarn behind the back rolls is that after the frame is dofl'ed, in order to start each broken end, its top back roll must be 'lifted and all its top carrier rolls must be firmly, while the front rolls pull it apart at a point between themselves and the front carrier rolls.

When broken at this particular point, it is not necessary to pass the roving again through the back roll, as whenthe operator starts the machine by dropping the back roll into place, the roving will be fed instantly and automatically to the front roll.

With my device, whichever method is used, either piecing the broken ends or breaking them behind the back rolls, lap waste is prevented. When production is required the operator can piece the ends, but when unpieced yarn is required, it is not necessaryto break the ends behind the back rolls as when the top back roll is lifted, delivery is stopped and the roving is gently held and broken behind the front rolls. One operator can therefore take care of a very is done away with altogether except to generally supervise perhaps ten or twenty machines.

The only operators required, are the doflers. Steadiness 1n the rocking members, posi v adapted to separate the back drawing rolls.

I will call the flexible means with the stretcher plate and connections means for holding such padded means out of action, and I will call the vibrator. power driven means for releasing the last named means.

I claim:

. 1. In a spinning frame having back drawing rolls, front drawing rolls and a bobbin, the combination of a two-part rocking member, the front part terminating in a thread guide over the bobbin between the front drawing rolls 'and the bobbin so arranged that the roving will be givena double bend in passing therethrough, and being pivoted to pivoted to the back of the; stretcher plate that it can-be caught under the hook with its front end under the rear part of the rocking member, and a flexible member which passes through both slots, together with a carriage adapted to slide under the back part of the rocking member and over the spring to set the flexible member on the shoulder of the stretcher plate and to depress and catch the spring under the book by the same movement, and padded means held out of action by the flexible member for separating the back drawing rolls, and for holding the roving thereat whereby it is broken behind and close to the front rolls.

2. In a spinning frame having back drawing rolls, front drawing rolls and a bobbin, the combination of a two-part rocking member, the front part terminating in a thread guide over the bobbin between the front drawing rolls and the bobbin so arranged that the roving will be given a double bend in passing therethrough, and being pivoted to rock vertically on the frame, and the rear part being pivoted to the front member so as to rock vertically independent thereof and to swing horizontally, both Within the limits of suitable stops, with a vibrator, a stretcher plate in which is a slot having a shoulder, a hook carried by such stretcher plate, a spring having a slot" in operative relation with the slot and shoulder of the stretcher plate so pivoted to the back of the stretcher pla that it can be caught under the hook-wit its front end under the rear part of the rocking member, and a flexible member which passes through both slots, and padded means held out of action by the flexible member for separating the back drawing rolls and am holding the roving thereat whereby it is broken behind and close to thefront rolls.

3. In a spinning frame having back drawing rolls, front drawing rolls and a bobbin, the combination of a rocking member, the front part terminating in a thread guide over the bobbin between the front drawing rolls and the bobbin so arranged that the roving will be given a double bend in passing therethrough, and being pivoted to rock vertically on the frame, and to swing horizontally, with a vibrator, a stretcher plate in which is a slot having a shoulder, and a flexible member which passes through both slots, and padded means held out of action by the flexible member for separating the back drawing rolls and for holding the roving thereat whereby it is broken behind and close to the front rolls.

4. In a spinning frame having front drawing rolls, a bobbin, and separable back drawing rolls, the combinationof a rocking member, the front part terminating in a thread guide over the "bobbin between the" front drawing rolls and the bobbin pivoted to rock on the frame, with padded means adapted to separate the back drawing rolls when released, means for normally holding such padded means out of action, and power driven means for releasing the last named means and the padded means adapted to 010* crate by the action of the rocking member.

5. In a spinning frame having front drawing rolls, a bobbin, and separable back drawing rolls, the combination of a rocking member, the front part terminating in a thread guide over the bobbin between the front drawing rolls and the bobbin pivoted to rock on the frame, with padded means adapted to separate the back drawing rolls when released, means for normally holding such padded means out of action, and power driven means for releasing the last named -means and the padded means adapted to opcrate by the action of the rocking member,

together with spring mechanism releasable by such power means when operated by the rocking member'to return the rocking memher to its normal position.

6. In aspinningframe having front drawing rolls and a bobbin, together with back drawing rolls, one of which is positively driven and the other spring-pressed against it, the

combination of a rockin member, the front part terminating in a t read guide located over the bobbin between the front drawing rolls and the bobbin so arranged that the roving will be given a double bend in passing therethrough and being pivoted to rock on the frame, with padded means adapted to separate the back drawing rolls, and mecha-.'

nism operative by the rocking member which normally holds-the padded means out of action.

7. In a spinning frame having front drawing rolls, a bobbin, and separable back drawing rolls, the combination of a rocking member, the front part terminating in a thread guide over the bobbin between the front drawing rolls and the bobbin pivoted to rock on the frame, with padded means adapted to separate the back drawing rolls when released, means for normall padded means out of actlon, and means for releasing the last named means and the padded means adapted to operate by the action of the rocking member.

8. In a spinning machine having front drawing rolls and a bobbin, the combinaholding such Y roving passes so located that the roving, in

ing therethroug ii passing from the front drawing rolls to the bobbin, w'ill be ;given a double bendout of a: straight coursesufiiciently to depress such eye and-rocking member when the roving is being wvound or spnn on the bobbin, together with mechanism operative by the rocking v@member adapt-ed to stop the delivery of roving when :an end breaks.

9. In a spinning :frame, a rocking memher, the -Ziiront part of which terminates in a thread guide :between the front drawing rolls and the bobbin so arranged that the roving will be 'vena double bend in pass- 1O. In a spinning frame having a positively driven bottom back drawing roll and a top back drawing roll driven therefrom which can be moved out 'of engagement therewith, a padded lifting member nor- .mally heldout of action and out of contact with both the top and bottom back drawing rolls, adapted when released to move the top back drawing roll away from the bottom back drawing r011 without coming in contact with said bottom back drawing roll and to stop said top back drawing foll from revolving.

In testimony whereof I have afiixed my signature.

GEORGE M. ARRAGG.

Images