US2345245A - Builder motion for spinning and twister frames - Google Patents

Description

March 28, 1944. s. E. EDFORS BUILDER MOTION FOR SPINNING AND TWISTER FRAMES Filed Dec. 10, 1941 4 Sheets-Sheet l March 28, 1944. s E. EDFORS BUILDER MOTION FOR SPINNING AND TWIS'IER FRAMES Filed Dec. 10, 1941 4 Sheets-Sheet 2 March 28, 1944. s. E. EDFORS BUILDER MOTION FOR SPINNING AND TWISTER FRAMES 4 Shee'ts-Sheet 3 Filed Dec. 10, 1941 MW C". a. 8 e F I ar m a4 J 0 I, .2 0 5 Wmu A: l v a c 1 o m d m u a 0 8 6 W 6 6 W I l ld \n. I ===-Mm I M 4 M 5 March 28, 1944. 5 2,345,245

BUILDER MOTION FOR SPINNING AND TWISTER FRAMES Filed Dec. 10, 1941 4 Sheets-Sheet 4 .V///////////// ////A N A B Q I N I 11mm U! V//////r Patented Mar. 28, 1944 BUILDm'MOTION FOR SPINNING AND TWISTEB FRAMES Sven E. Edfors, Saco, Maine, assignor to Sam- Loweil Shops, Boston, Mass, a corporation of Application December 10, 1941, Serial No. 422,359

18 Claims.

The present invention aims to devise a simpier mechanism and one more easily adjusted and controlled by the workmen than that shown in my pending application for producing automatically yarn packages of the general character above referred to.

The nature of the invention will be readily understood from the following description when read in connection with the accompanying drawings, and the novel features will be particularly pointed out in the appended claims.

In the drawings,

Figure l is a side view, somewhat diagrammatic in character, of a portion of a twister frame adjacent to the head end thereof, illustrating parts of a builder motion embodying this invention;

Fig. 2 is a vertical, sectional view longitudinally of the builder arm shown in Fig. 1;

Fig. 3 is a transverse, sectional view approximately on the line 3-4, Fig. 2;

Fig. 4 is a plan view of the mechanism mounted at the right-hand end of Fig. 2 of the builder arm;

Figs. 5, 6 and 7 are transverse, sectional views approximately on the lines 5-5, 6-6 and 1-1, respectively, of Fig. 4; and

Fig. 8 is a partial sectional view showing somewhat diagrammatically a yarn package of a form which this mechanism is well adapted to produce.

Referring first to Fig. 1, the machine there shown comprises a spindle rail 2 and a ring rail 3. the former carrying a series of spindles 4, each adapted to support a bobbin or other core on which the yarn or thread is to be wound. The vertical traversing movements of the ring rail required for this purpose are produced by a builder motion including a cam 5, Fig. 2, cooperating with a pitman roll 6 on the builder arm I which is pivotally connected at 8 to a stationary part of the frame. Mounted in a curved guideway in the arm I is a toothed rack l0, slidably adjustable along said guideway,

to operate other lifter rods, all of which coop- 'erate to support the ring rail 3.

So far as the mechanism above described is concerned, it is essentially like those commonly used heretofore in" twister frames.

The present invention will be herein disclosed as embodied in a mechanism designed. especially to produce a threadoryarn body of the general form illustrated in Fig. 8. Such a yarn package has an upper end considerably smaller than its lower end but it, is of substantially uniform diameter from its bottom up to a point located more than half of the height of the thread body above said bottom. According tothe preferred method of building this yarn package, the entire body is produced by repeating winding cycles, each of which consists in making a section of spool wind containing a predetermined number of layers of yarn and a tapered section produced by progressively shortening the traverse of the 1 ring rail by predetermined steps down to a fixed minimum at the lower end of the tapered section of the body, thereafter progressively increasing I the traverse of the ring rail by corresponding increments until a full length traverse is again produced, and then repeating the three-step cycle just described indefinitely until a yarn package of the desired diameter has been built up.

To describe the process somewhat more in detail, the rack It remains at the outer limit of its range of adjustment on the builder arm substantially as shown in Fig. 2, while the builder motion operates in the usual and well known manner to wind successive layers of yarn, one upon the other, and the ring rail traverses the entire length of the yarn body during the building of the first section of the yarn package above described. Thereafter a reversible pick mechanism is brought into action automatically which adjusts the rack it toward its fulcrum 8 by increments of predetermined value until it has been moved toward the fulcrum to a predetermined limit and this action then is reversed, the rack being moved outwardly by corresponding incre-' ments until the full length traverse of the ring and a chain H guided 55 rail has again been -destored. The rack re- -hand end of thisshaft mains in this position while the spool wound section of the next cycle is produced and these operations are repeated.

For the p rpose of producing the adjusting movements of the rack just described, a worm 20, Fig. 2, meshes with the rack l and is mounted loosely on a worm shaft 2| supported in suitable bearings in the builder arm I. At the righta ratchet wheel 22, Figs. 2, 4 and 7, i keyed thereto and is adapted to be operated by a, double acting pawl 23. Mounted immediately beside the feed ratchet 22 is another ratchet wheel 24 of smaller diameter, turning loosely on a stationary bearing bushing 25, Fig. 2, and backed up by a friction washer 26. A

divided spring 21 is interposed between the two ratchet wheels and applies sufficient friction to them to prevent either from rotating except when operated by the pawl 23. The spring is keyed to the bushing 23 and thus is held against rotation.

The pawl 23 is keyed to a pivot stud 28 carried by a lever "which is mounted to rock on the bushing 25. As best shown in Figs. 2 and 6, this lever has an integral segment gear portion 3| meshing with a mutilated gear 32 secured on a rock shaft 33 which runs the greater part of the length of the builder arm and projects from the left-hand end therefrom, Fig. 2. On this projecting end is mounted an arm 34 carrying a roll 35 which is adapted to engage stops 36 and 31 secured to the head end frame of the machine. Thus as the builder arm approaches either the upper or lower limit of its swing the roll 35 will engage one or the other of these stops and such engagement will swing the rock shaft 33 about its axis, thus operating through the connections just described to swing the lever 30 and the pawl 23 about the axis of the shaft 2|. The stops 38 and 31 are vertically adjustable.

Assuming that the pawl 23 is tipped, as shown in Fig. 7, the oscillating movements of the shaft 2| created in the mannerjust described will cause the pawl to move the ratchet wheel 22 one tooth in a clockwise direction for each complete reciprocation of the ring rail,- and this movement will be transmitted to the worm through a clutch comprising tapered teeth formed on the left-hand end of the worm and complemental teeth on the adjacent end'of a clutch sleeve 38, Fig. 2, slidable on the shaft 2|. These two sets of teeth normally are pressed together by means of a spring 40, encircing said shaft and backed up by a collar 4| pinned to the shaft. The sleeve 33 is splined to the shaft so that it transmits the rotary motion of the latter to the worm 20 but it can be moved against the pressure of the spring to release the clutch. Since successive movements of the ratchet wheel22 in a clockwise direction operate through these connections with the rack III to move it toward the pivot 8 of the builder motion, they progressively lower the upper limit of'the ring rail traverse, while a reversal of these adjusting movements has an opposite effect.

The ratchet wheel 22 is suillciently larger in diameter than the ratchet wheel 24 to hold'the pawl normally out of contactwith the teeth of the latter. However, the former is provided with one notch a, Fig. '7, of suflicient depth to permit the pawl to drop in behind one of the teeth of the wheel 24 and thus to actuate it. This occurs only once in each revolution of the feed wheel 22, and this arrangement is utilized both to'predetermine the adjustmentotthe rack made by 75 her of full the pick mechanism in a given direction, and also to eilect the reversal of that adjustment. For this purpose two disks are mounted on a hub portion of the ratchet wheel 24 so that they are compelled to revolve with it, and they carry lugs 42 and 43, respectively, Figs. 4 and 7. These disks are adjustable circumferentially on the hub of the wheel 24 so that when a predetermined number of picksof the feed ratchet 22 have been made in a clockwise direction, Fig. 7, the lug 42 will engage the V-shaped lug or projection 44 of a reversing lever 45 which also is keyed to the pivot stud 28. A link 46 pivotally connects the lug 44 with a block 41 pivoted to the side of the lever 30, it is encircled by a compression spring 48 and its lower end is arranged to slide axially in said block. Consequently, when the lug 42, moving in a clockwise direction, has swung the lug 44 into a dead center position, thus com- 'pressing the spring 48, the energy so stored is released immediately thereafter as the lug passes such dead center, and snaps the double-ended pawl 23 into its reversed position. Thereupon the rocking movements of the lever operate through the pawl 23 to feed the ratchet wheel 22 in a counter-clockwise direction, as seen in Fig. 7. Rotative movement of the wheel 22 in the new direction continues until the other lug 43 engages the part 44 of the reversing lever and shifts the pawl 23 back into its initial position.

It will thus be evident that as the machine continues in operation the slide or rack I0 is first adjusted by short feeding movements in an inward direction to step down or shorten the length of traverse of the ring rail and that when this adjustment has proceeded to a degree determined by the number of teeth or picks for which the reversible pawl and ratchet mechanism is adjusted, the rack then will be fed outwardly, step by step, an equal number of picks" and thus returned again to the outer limit of its range of travel. This completes one picking cycle.

It should :be observed, however, that these adjusting movements affect only the upper portion of the traverse of the ring rail since the railis at the lower limit of its traverse when the point of the cam 5 engages the pitman roll 6, and the arc of travel of the rack I0 is in a path curved about a center located at the lower edge of the guide roll I2. Consequently, any adjustment of the slide has no effect on the lower limit of the rail traverse but it does affect thoupper limit of the traversing movement because the builder arm at that time is swung downwardly out of the horizontal position in which it is shown in Fig. 2. Thus any change in the distance between the anchoring point of the chain II to the rack l0 and the pivot point 8 of the builder a'rm affects the height to which the ring rail is allowed to rise. In this particular machine the cam 5 acting on the roll 6 positively produces the downward movement of the ring rail and its upward movement is produced primarily by weights, one of which is shown at I5 in Fig. 1, this upward movement, however, being under the control of the cam.

As above stated, it is contemplated that in the production of the particular yarn package shown the rack III will be held at the outer limit of its range of traverse for a predetermined number of traverses after one entire picking cycle has been completed and before another such cycle is begun. This operation is controlled by a counting mechanism, adjustable to vary at will the numlength traverses which the ring rail makes during the interval between picking cycles.

This mechanism comprises a timing disk '53, best shown in Fig. 4, mounted to revolve on the hub of the lever 33 and held thereto with sumcient friction to prevent any possibility of rotative movement relatively to the'lever unless acted upon by external means. Keyed to the pivot stud 23 on which the feed ratchet 23 is secured is a control lever and the parts are so designed that when the pawl 23 is thrown to the right, Fig. 7, in readiness to start a new picking cycle the lever 5! will strikethe rim of the timingdisk 50 and so prevent the pawl 23 from engaging the ratchet wheel 22. Thus the rack ID will remain in its extreme outer position, and the ring rail will make full length traverses until such time as the pawl 23 is again allowed to engage the ratchet wheel 22.

To permit such engagement a slot b, Figs. 4 and 6, is milled across the rim of the disk 50 where it will allow the right-hand end of the lever 5| to drop into it and thus release the pawl 23 when the desired number of full length traverses has been made.

In order to actuate the timing disk 50 a ratchet wheel 52 is keyed to the hub 53 of the timing disk and is arranged to be fed by a pawl 54, Figs. 4 and 5, which is mounted on a pivot stud carried by a lever 55 similar to the lever 30. Like the latter, this lever has a segmental gear 55, Fig. 5, meshing with a second mutilated gear 51 secured fast on the rock shaft 33, previously referred to. Consequently, the two levers 55 and 30 oscillate in unison, and for each traverse of the ring rail the pawl 54 will pick the ratchet wheel 52 one tooth and the timing disk 50 will move with it. After the disk has been fed in this manner for a predetermined number of teeth, equal to the number of full length traverses which the ring rail is to make during this stage of the cycle, the slot b comes into line with the right-hand end of the lever 5| and allows the lever to drop into it, as shown in Fig. 6, and consequently allows the right-hand end, Fig. '7, of the pawl 23 to engage the teeth of the feed ratchet 22. At this time, also, the pawl 54 drops into a space 53, Fig. 9, formed in the ed e of the ratchet 52 and thus stops further feeding of the timing disk 55.

In order to predetermine the point from which the counting of the picks will start, a re-set ratchet 58, Figs. 4 and 6, is mounted on the hub 53 immediately beside the ratchet 52 and is arranged to be actuated at certain times by a pawl 30, Figs. 2 and 6, mounted on the pivot stud 6| carried by the arm 55. A shield 52 (Figs. 2, 4 and 6, is also mounted on the hub of the timing disk close besidethe main body of the disk and is circumferentially adjustable with reference to the latter, a screw 53, Fig.. 2, serving to secure it in its adjusted relationship to the timing disk.

When the feed pawl 23 is thrown to the left at the start of the second step of the varl-pick cycle, and the rack iii is being moved outwardly away from the fulcrum,the pawl 60 will then move the re-set ratchet wheel 55 one tooth for each complete traverse of the ring rail, thus carrying the timing disk 50 and the shield 52 backwardly in a counter-clockwise direction until the rearward edge of the shield disenga es the pawl from the ratchet and therefore stops the rotation of the timing disk. As shown in Fig. 4, the edge of the timing disk is graduated in picks or traverses of the ring rail and the shield has an arrow adjacent to its edge which points to the graduation on the timing disk for which the shield is set. Whenthe timing disk and its shield have been moved, as Just described, they remain stationary with reference to the lever 55 until the feedpawl 23 is'again reversed at the completion of the vari-pick cycle. At this time L the disk is in the correct position to count of! the number of traverses which the ring rail-will make before the slot 1) will come into the position shown in Fig. 6.

Thus at the completion of the vari-pick cycle and with the rack approaching the outer end of the builder arm, the pawl 23 will be thrown over to the right by the lug 43 but it will not be allowed to engage the ratchet wheel 22 because the right-hand end of the control lever 5! will strike the rim of the timing disk 50. However, the pawl 54 at that time will be feeding the ratchet wheel 52, thus moving the timing disk 50 in a clockwise direction, Fig. 6, and when the number of teeth for which the shield 62 is set have been counted off, and the ring rail therefore has made the prescribed number of traverses, the lever 5i then will drop into the slot b,

- as shown in Fig. 6, thus allowing the feed ratchet 23 to drop into engagement with the ratchet 22 to start a new vari-pick cycle.

The operations above described will be repeated automatically so long as the machine is running. When the yarn body on a bobbin has been built up to the desired size, it may be dofled and an empty bobbin placed on the spindle from which it has been removed. If the machine is equipped with brakes individual to the respective spindles, as is a common practice, then the entire dofling operation may be performed without shutting it down.

It will be evident from what has been said above that the number of traverses of the ring rail produced in any part of the building cycle can be adjusted to suit the requirements of different yarn packages. The length of the taper depends upon the length of travel of the rack i0 which, in turn, depends on the number of revolutions which the feed ratchet 22 is allowed to make in each part of the vari-pick cycle. Consequently, for some lengths of taper it may be necessary to replace the ratchet wheels 22 and 24 with others having different numbers of teeth.

It will also be observed that there is an interconnection between various elements of the timing mechanism and the pawl and ratchet mechanism required to produce these results and at the same time to provide the desired degree of adjustability and this relationship may be summarized as follows:

The pawl 23 is the actuating element for the ratchet wheels 22 and 24 of the pick mechanism, but it is controlled at times by the lever 5i which, in turn, is controlled by the timing disk 50. While the rack i0 is being moved to lengthen the traverse of the ring rail, the disk 50 is being re-set by the actuation of the resetting ratchet wheel 58 by the pawl 60, and the extent of this re-setting movement is determined by the adjustment of the shield 62 relatively to the timing disk 50. At the completion of the vari-pick cycle and while the ring rail is making'full length traverses, the pawl 54 .then picks the ratchet wheel 52 in a clockwise direction, carrying the unwinds.

so that when the lever is tipped in one direction or the other it will lift thepawl 54 or Bil which should be held out of contact with its respective ratchet wheel at that particular point in the cycle of operations of the machine.

It may not be practical to make the control ratchet 52 with a sufficient number of teeth for the operation of the mechanism in the manner sometimes desired. In order to accommodate such a, requirement, an auxiliary rachet wheel .64, best shown in Figs. 4 and 5, is mounted immediately beside theratchet 52 where it will be operated by the pawl 54 previously described, and this auxiliary ratchet isprovided with teeth sufiiciently high to prevent the pawl from engaging the teeth of the ratchet 52, but every third notch of the auxiliary ratchet is cut to such a depth as to permit the pawl to engage the ratchet 52 and thus to operate it one tooth. Thus the auxiliary ratchet has the effect of reducing the rate of operation of the ratchet 52 to one-third of that at which it would be operated were it not for the auxiliary ratchet.

As the rack Ill arrives at the outer limit of its range of travel, approximately as shown in Fig.

' 2, its direction of motion should be reversed at a very definite point, and in order to avoid breakage of the parts due to an over-travel caused accidentally. as for example by a faulty setting of the pick mechanism, a stop 85, Figs. 2 and 3, r-ay be adjustably secured to the side of the rack Ill where it will engage the lower end of a cooperating piece 66 secured to one of the arms of the clumh lever 61 and thus will throw out the clutch just before the rack Iii has reached the extreme outer limit of its travel. As a further safety factor. it is preferable to make the clutch teeth at such a taper so that if the rack strikes some unyielding obstruction the two sets of teeth, acting one on the other, will produce a cam action forcing the clutch sleeve 38 backwardly against the tension oi the spring 40 and thus prevent breakageof the parts.

Preferably the fulcrum 8 for the builder arm is mounted on a dove-tail slide 10 working in a groove H of complemental shape formed in the upright edge of the frame piece 12. A vertical screw I3 threaded through a lug 14 on this frame piece bears against the lower end of the slide and is useful in adjusting the entire arm vertically into the desired relationship to the builder cam 5, and it also serves to hold the arm in its adjusted position.

It will be evident from the foregoing that this invention provides a relatively simple and exceptionally reliable mechanism for building yarn packages having tapered tops with a wind of such a nature that, even when the yarn is of a slippery character, there is substantially no danger of the adjacent convolutions slufling. oil as it At the same time the yarn will run freely as it is drawn from the top. In addition, the shape of the package can be varied widely since the length of the tapered section can be adjusted in the manner above described and the slope of the taper also can be changed by varying the size of the increment by which the varipick sections are stepped. Also, by varying the volume of these sections the relationship between the diameters of the top and bottom of the package can be changed very substantially.

Applicant's Patent No. 2,295,724 issued on application Ber. No. 294,474, discloses a solution for the problem with which the instant application deals that is quite different from the invention here disclosed but which, nevertheless, contains \some features resembling those of the mechanism here described and claimed. Any claims covering subject matter common to the two disclosures are presented in the issued patent, the claims of this application being limited to subject matter not disclosed in said patent.

Having thus described my invention, what I desire to claim as new is:

1. In. a twister frame, the combination with a ring rail, a spindle rail cooperating therewith,

and spindles mounted thereon and adapted to hold thread supporting cores, of mechanism for producing traversing movements of said ring rail to wind thread on the entire lengths of said cores, additional mechanism cooperating with the first mentioned mechanism for gradually reducing the length of said traversing movements and then gradually increasing it again, a counting mechanism actuated by said first mentioned mechanism and mechanical connections between said counting mechanism and said additional mechanism whereby the former controls the operation of the latter.

2. In a twister frame, the combination with a ring rail, a spindle rail cooperating therewith, and spindles mounted thereon and adapted to hold thread supporting cores, of mechanism for producing traversing movements of said ring rail to wind thread on the entire lengths of said cores, additional mechanism cooperating with the first mentioned mechanism for gradually reducing the length of said traversing movements and then gradually increasing it again and repeating these operations, and automatic means mechanically connected with said additional mechanism for holding the latter inactive for a period between successive cycles of operation of said additional,

mechanism during which the ring rail makes a predetermined :number of full length traverses.

said automatic -means being actuated by said said mechanism including a builder arm, additional mechanism cooperating with the first mentioned mechanism for gradually reducing the length of said traversing movements and then gradually increasing it again and repeating these operations, and automatic means for holding said additional mechanism inactive for a predetermined period during which the ring rail makes full length traverses and then bringing said additional mechanism into action again, said means being operated by the movements of said builder arm.

4. A twister frame according to preceding claim 3, in which said automatic means is adjustable to change the length of said periods of inaction.

5. A twister frame according to preceding claim 2, in which said automatic means includes a controller adjustable to change the duration of said period and a counting mechanism for operating said controller.

6. Ina twister frame according to preceding the length of traverse of claim 1, a construction in which both said additional mechanism and said counting mechanism are operated by the mechanism for producing said traversing movements of the ring rail.

7. In a twister frame, the combination with a ring rail, a spindle rail cooperating therewith, and spindles mounted thereon and adapted to hold thread supporting cores, of mechanism for producing traversing movements of said ring rail to wind thread on the entire lengths of said cores, additional mechanism cooperating with the first mentioned mechanism for gradually reducing the length of said traversing movements and then gradually increasing it again, and mechanical timing mechanism connected with said additional mechanism and controlling the operation of the latter, said timing mechanism including a pawl and ratchet actuating means arranged to be op- ,erated by said first mentioned mechanism.

8. In a builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a member adjustable lengthwise of said arm to change the length of traverse of -said rail, a rotary ele- 4 ment for producing adjusting movements of said member along said arm in opposite directions, mechanism for rotating said element in opposite directions to shorten said length of traverse and thereafter to lengthen it again, and a mechanical counting mechanism actuated by the movements of the builder arm andcontrolling the operation of the previously mentioned mechanism.

9. In a builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a member adjustable lengthwise of said arm to change said rail, a rotary element for producing adjusting movements of said member along said arm in opposite directions, mechanism for rotating said element in opposite directions to shorten said length of traverse and thereafter to lengthen it again and repeating said operations, and mechanical counting means actuated by the motion of the builder arm and controlling the numbef of traverses made by said ring rail between successive cycles of operation of said first mentioned mechanism.

10. In a builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a rack slidably adjustable lengthwise of the arm toward and from the pivot for said arm, a rotary worm mounted on said arm and operatively connected with said rack to adjust it in opposite directions lengthwise of said arm, mechanism for rotating said worm in opposite directions to shorten the length of said traverse, step by step, and thereafter to lengthen it correspondingly, controlling means for said mechanism including a. timing member, mechanical connections between said member and said mechanism for holding the latter out of operation at times, and paw] and ratchet means actuated by the motion of the builder arm for operating said timing member.

11. A builder motion according to preceding claim 10, in which said timing member is mounted for rotative movement and said pawl and ratchet means is operable to rotate said timing member in opposite directions.

12. A builder motion according to preceding claim 10, in which said timing member is mounted for rotativemovemen't and said pawl and ratchet 13. In a builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a rack slidably adjustable lengthwise of the arm toward and from the pivot for said arm, a rotary worm mounted on said arm and operatively connected with said rack to adjust it in' opposite directions lengthwise of said arm, a pawl and ratchet mechanism mounted on said arm and connected with said worm to revolve it in opposite directions, said mechanism including means for automatically reversing itself when it has made a'predetermined number of rotative move ments, a mechanical counting mechanism actuated by the motion of the builder arm and controlling the periods of operation of said pawl and ratchet mechanism and operable to hold the latter out of action during predetermined periods in the cycle of operations of the machine, and connections between said mechanisms providing a mutual control by each over the operations of the other.

14. In a builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail includingva rack slidably adjustable lengthwise of the arm toward and from the pivot for said arm, a rotary worm mounted on said arm and operatively connected with said rack to adjust it in opposite directions lengthwise of said arm, a pawl and ratchet mechanism mounted on said arm and connected with said worm to revolve it in opposite directions, said mechanism including means for automatically reversing itself when it has made a predetermined number of rotative movements, and also including means for adjusting said number, a counting mechanism actuated by the motion of the builder arm and controlling the operation of said pawl and ratchet mechanism and operable to hold the latter out of action during certain periods in the cycle of operations of the machine in which periods the rail makes full length traverses, said counting mechanism being adjustable to vary at will the number of said traverses.

15; In a builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a rack slidably adjustable lengthwise of the arm toward and from the pivot for said arm, a rotary worm mounted on said arm and operatively connected with said rack to adjust, it in opposite directions lengthwise of said arm, a pawl and ratchet mechanism mounted on said arm and connected with said worm to revolve it in opposite directions, a rotary controlling disk, connections between said disk and said mechanism operable to prevent the feeding or said ratchet by said pawl at certain periods, and additional pawl and ratchet means for rotating said disk to feed it into a position appropriate to bring the first pawl and ratchet mechanism into operation again and also to re-set the disk after such operation in position to prevent the operation of the first pawl and ratchet mechanism.

16. In a building motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a rack slidably adjustable lengthwise oi the arm toward and from the pivot for said arm, a rotary worm mounted on said arm and operatively connected with said rack to adjust it in opposite directions lengthwise 01' said arm, a pawl and ratchet mechanism mounted on said arm and connected with said worm to revolve it in opposite directions, a rotary controlling disk, connections between said disk and said mechanism operable to prevent the feeding 01' said ratchet by said pawl at certain periods, and additional pawl andratchet means for rotating said disk, said disk being graduated, and a shield mounted closely adjacent to said disk for adjustment relatively thereto, said shield controlling the operation of said disk by said pawl and ratchet mechanism for operating it.

1?. ma builder motion for operating the traversing rail of a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a rack slidably adjustable lengthwise of the arm toward and from the pivot for said arm, a rotary wormmounted on said arm and operatively connected with said rack to adjust it in opposite directions lengthwise of said arm, a shaft supporting said worm, a pawl and ratchet feeding mechassesses anism for said worm including a ratchet wheel secured on said shaft, a counting mechanism controlling the operation or said pawl and ratchet mechanism and including a timing disk and a ratchet wheel operatively associated therewith, both mounted for rotation around said shaft, and a second pawl for operating the ratchet wheel for said disk.

18. In a builder motion for operating the traversing rail or a twister frame, the combination of a pivoted builder arm, means for operatively connecting said arm with said rail including a rack slidably adjustable lengthwise or the arm toward and from the pivot for said arm, a rotary worm mounted on said arm and operatively connected with said rack to adjust it in opposite directions lengthwise of said arm, a pawl and ratchet mech mounted on said arm and connected with said warm to revolve it in opposite directions, and controlling means for said mechanism comprising a timing disk, a pawl and ratchet mechanism for rotating said disk in one direction and another pawl and ratchet mechanism for revolving it in an opposite direction, and means whereby said disk exercises a control over the period of operation of all of said pawl and ratchet mechanisms.

SVEN E. EDFORS. Y

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