US953801A - Spinning-mule. - Google Patents

Description

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s PATEEJT WILLIAM D. RUNDLETT, OF NGRTH ANDQVER, MASSAQHUSETTS, ASSIGNOR TO DAVIS 85 FURBER MACHINE COMIPANY, 02 NORTH ANDOVER, TEASSAOHUSETTS, A CORPORA- TION OF MASSACHUSETTS.

SPINNING-MULE.

esaeoi.

Patented Apr. 5, with Serial No, 52L82.

To all whom it may concern:

lie it known. that I, lViLLrAM D. BUND- 'LETT, a citizen of the United States, and resident of North Andover, county of Essex, State of Iviassachusetts, have invented an improvement in Spinning-Mules, of which the following description, in connection with the accompanying drawing, is a speci ticatiou, like characters on the drawing representing like parts.

This invention relates to spinning mules and more particularly to the so-called quadi'ant-mechanism, in which the quadrant is provided with a screw rotated automatically by suitable means including an intermittingly-acting member such as a teed-band or rope which is moved longitudinally when the tension of the yarn deniai'ids it, to thus etiect the feed of the quadrant-nut cooperating with the screw. Said nut has a sheave over which passes the winding chain coni'iected with the spil'idle-driving drum, means being provided to oscillate the quadrant with a constant stroke throughout the wind ing of a set of cops, all in a manner well known to those skilled. in the art.

The teed-band is in practice carried around a sheave rotatably mounted on the usual reciprocating carriage, and Ordinarily the band is inactive, 2'. c. it has no longitudinal movement as the carriage reciprocatcs, but such reciprocation, in conjunction with the engagement of the feed-band and sheave, causes the latter to rotate. When such rotation is stopped, however, the teed-band is in a manner held from movement relatively to the carriage and hence is caused to travel loi'igitudinally and thereby to e'tlect, through suitable gearing, the rotation of the quadrant-screw and consequent feed of the cooperating nut. Such stoppage of rotation of the rotatable member or sheave on the carriage is controlled by or through the taller-motion, which comprehends a guide taller to guide the yarn to position and a tension taller to retain the yarn under tension, both mounted on the carriage and or dinarily controlled by weights, the fallers being provided with rocking arms to raise and lower the tccd controller chain.

lioth the teed-band and the sheave rotated thereby are idle or inactive, so far as concerns the performance of any function, when the teed-band is quiescent and the sheave rotates, but when the rotation of the sheave stopped and consequent longitudinal movement ot' the teed-band is effected both of said parts become active to effect the operation of the feed-motion, as will be ap parent.

()rdinarily stoppage oil rotation of the sheave is etiected by engaging the same with a pawl properly guided and supported by the usual carriage, operated and controlled by the tellers, as for instance in United States Patent. No. 866,307 granted to me September 17, 1907.

Briefly describing the operation, it the yarn is being wound too fast the strain thereupon draws down the tension taller, rocking its arm, and through the feed-controller chain the pawl drops into engagement with and stops rotation 01 the sheave on the carriage, so that as the latter moves the teed-band is moved and by intervening mechanism, turns the quadrant-screw and feeds the nut thereon. This results in the unwinding of less chain from the chaindrum and the spindles are turned less rapidly, reducing the amount of yarn being wound and allowing the tension taller to rise, or to descend less rapidly, according to the degree of control demanded.

The descending movement of the taller controlling the tension on the yarn is very gradual, while it will be apparent that the operation of the means which sets up or brings about the functional movement of the normally quiescent member of the feed-m0- tion must be practically instantaneous it durability and surcness of action is to be maii'itained. This is impossible in the structures now known to me when operated from a slow moving source, such as the taller, and as a matter of actual practice the excessive wear of the pawl and ratchet device now in use, and its more or less faulty operation, is due to the fact that such cooperating parts are brought into partial engagement and disengagement often a number of times before the complete engagement is eli'ected. There is no instantaneous and complete ongagement of such parts, and it cannotbe, ere

cept accidentally and occasionally, in the mechanism now in use, and my present in vention has for its object the production of means whereby the objections herein QiiiOIG set forth are efiectually overcome and a complete and instantaneous co'ciperation ot' the parts is ell ected when demanded.

In one practical embodiment of my invention shown and described herein, the means which brings about the operation of the feed-motion is, for illustrative purposes, shown as having two members which are to operatively engage, one being movable with relation to the other, but one of said members is held or locked stationary with relation to and out of engagement with the other member, such relatively stationary member being released when demanded by the tension of the yarn, and its functional movementis once and instantly effected by actuating means independent of and separate from the taller. is a result the speed of movement of the faller has nothing to do with the relative movement of the cooperating parts into instant, full and. complete operative engagement, so that the desired object is attained. and objections heretofore present in such portions of a mule structure are eliminated.

For illustrative purposes and for convenience I have herein shown the cooperating parts or members as a pawl and a ratchet, and embodying in the general mode of operation one entirely practical and successful form of my invention.

The novel features of my invention will be fully described in the subjoined specifcation and particularly pointed out in the following claims.

Figure l in side elevation and section shows a sutlicient portion of a mule to be understood, with one practical embodiment of n present invention applied thereto, the feed-motion being inactive; 2 is an enlarged detail in side elevation of the novel structure illustrated in Fig. l and in the same position as therein shown; Fig. 3 is a similar view but showing the parts in position to effect the functional or longitudinal movement of the feed-band and thereby cause the feed-motion to operate; Fig. e is a left-hand end elevation of the mechanism shown in Fig. is a diametrical sic"- tion of the member cooperating with the feed-band and by or through which said band is rendered active; Fig. 6 shows side and edge views of one part of the looking or detent device, to be referred to; Fig. '7 shows similar views of the other part of such device.

Referring to Fig. 1, A is a part of the usual reciprocating mule-carriage having spindles, as A, and a spindle-driving drum A B is the shaft of the tension faller and B its connected arm; C is the shaft of the winding or guide faller, with a connected arm C, and C is a chain or other flexible connection suspended from said arms and carried around a sheave on a rod (4 movable longitudinally in a guide a mounted on the carriage, the connection C being sometimes termed the feed-controller chain, all of said parts being of usual construction and substantially as in my patent referred to.

The quadrant D, quadrant-screw D and its nut D provided with sheave D the chain D operatively connected with the usual winding drum of the mule carriage from which the spindles derive their movementduring winding; the belt wheel or she ve (Z and the gearing D (see dotted lines Fig. 1) between it and the quadrantscrew, to rotate the latter; the wheel or sheave mounted on the stationary stand (Z sheave (Z rotatably mounted on a casting (Z secured to the carriage A, and the endless rope, belt or feed-band (Z are all of well known construction.

The sheaves (Z and (Z receive the feedand, which latter between said sheaves is passed partially about the sheave d and 21 second sheave all of said wheels or sheaves in practice being grooved to properly receive the feed-band, which band, with the gearing D constitute an instrumentality commonly termed the feed-motion, intermittingly active to effect rotation of the quadrant-screw.

Normally the sheaves (Z (Z rotate freely or idly on their axes as the carriage reciprocates and at such time the feed-band performs no function, it being quiescent and having no longitudinal movement, but when the rotation of the member or sheave (Z is stopped the functional movement of said band is effected, for then it is in a manner held to or connected with the carriage and is caused to move longitudinally.

The member or sheave (Z and the member or device for stopping the rotation thereof constitute, broadly speaking, the essential elements of means to cause the feed-motion to act, for when such members are in operative engagei'nent the functional or longitudinal movement of the feed-band is at once set up through the travel of the carriage. Herein, while these members are relatively movable one of them is normallystationary with relation to and disengaged from the other, and during such time the feed-motion is inactive, as will be manifest.

In the present embodiment of my inven tion the band-engaging member (Z has its hub l elongated to receive a ratchet 2, the parts being locked to rotate together by lug 3 on one entering a recess 4c in the other, Fig. 5, and a short-hooked arm 5 is fixed on the outer end of the stud 6 on which the sheave and connected ratchet rotate, but this particular structure may be modified as to its details without departing from my invention, and I consider the sheave (Z and its connected part 2 to constitute the member which rotates when the feed-motion is inactive.

Upon a lateral stud 7 projecting from the casting (Z above said rotatable member I pivotally mount the relatively movable stopping member or stop, shown as a pawl 8 having its free end shaped at 9 to squarely and firmly engage one of the ratchet teeth, as in Fig. 3, the engaging or functional movement of said member 8 being effected by a suitable spring 10, constituting an actuator, connected at one end with the fixed arm 5 and at its other end connected, as will be described, with an upward extension 11 on the pawl, at one side of its fulcrum stud 7.

When the rotatable and stopping members are relatively stationary and disengaged, Figs. 1 and 2, the actuator is under tension but is held from acting by a locking or cletent device, to be described, but when said device is rendered inoperative and the parts are released or unlocked the functional movements of the actuator 10 and the stopping member 8 instantly occur, and a quick, sharp and positive engagement of the pawl and ratchet occurs, instantaneously stopping the rotative movement of the sheave (Z and simultaneously setting up the operation of the feed-motion by or through the travel of the mule carriage.

Upon the stud 7 between the pawl 8 and the casting (Z is fixed, by a set screw 12, a keeper 13, shown separately in Fig. 7, having a stop shoulder 1a and an adjacent curved surface 15, and in the extension 11 I provide a headed pivot pin 16 on which is secured a detent, dog or latch 17, having a tooth 18 to at times cooperate with and be held by the stop shoulder 14, see Fig. 2. The detent has a rail 20 extended beyond the fulcrum pin 16, provided with an elongated slot 21, best shown in Fig. 6, the detent and pin 16 rockii'ig in unison. The detent and the shouldered keeper constitute a locking or detent device to maintain the stopping member 8 locked stationary in inoperative position, as shown in Figs. 1 and 2, at such time the tooth 18 engaging and being held by the shoulder 14-. so that the member 8 is held up in stationary position and out of engagement with the toothed or ratchet portion of the rotatable sheave cZ From an inspection of Fig. 2 it will be manifest that as long as there is any cooperation between the parts 1 1 and 18 the locking device will be operative and the stopping member will be held stationary relatively to and out of engagement with the rotatable member, the spring 10, attached eccentrically to the head of the fulcrum pin 16 at 19, acting to hold the detent securely in cooperative engagement with the keeper. At the instant of disengagement of the parts 14; and 18;. however, the locking or detent device becomes inoperative, the stopping member and actuator 10 are released from its control, or unlocked, and instant movement of the stopping member takes place,

and stoppage of rotation of the rotatable member, the parts just referred to then assuming the relative. positions shown in Fig. 3. The fced-band is now held or connected with the carriage in such manner that longitudinal movement of the band, and consequent operation of the feed-motion, is effected and the. qumlrant-screw will be rotated to effect feed of the nut D While the operation of the means to cause the feed-motion to act.- is directly effected by or through the actuator 10, as herein shown, such operation is controlled as to the time it shall act by or through the tension of the yarn, acting through the faller motion.

The longitudinally movable rod. (4 hereinbefore referred to has in previous structures had secured to or forming a part of it the pawl or tooth arranged to engage the ratchet connected with the sheave or rotatable member cl, as in my prior patent said rod being elevated by or through a pull on the flexible member or chain C and depressed by a spring, as a when the chain is slackened.

Herein, while the movement of said rod is effected as heretofore the stopping member or pawl is not mounted thereon, but is a separate device, (see the member 8 herein) and performs its functional movement independently of the movement of said rod.

7 Referring to Figs. 2 and 3 the lower end of the rod a has fixed thereto a laterally extended pin or stud which loosely enters the slot 21 in the tail. 20 of the member 17 of the locking device, and hence has a lostmotion connection therewith equivalent to the difference between the length of the slot and the diameter of the pin.

In the position of the parts shown in Figs. 1 and 2 it is supposed that the yarn tension acting through the faller motion has brought about a descent of the rod a until its pin 22 is at the bottom of the slot 21, and any further descent wil then operate to turn the dog or latch 17 with its fulcrum pin 16 against the action of spring 10, to disengage the tooth 18 from the stop shoulder 14. \Vhen this disengagement is complete the actuator 10 instantly throws the stopping member 8 into engagement with the ratchet 2, as shown in Fig. 3, and the dog 17 will be moved thereby into the position illustrated, the tooth 18 then bearing upon the top surface of the stop shoulder 14- and being held there by the pull of the spring. it will be seen that during this operation the member 8 has moved absolutely independently of the rod a, and that the pin 22 thereon is now at the upper end of the slot 21, Fig. 3, and during the actual functional movement of the stopping member 8 it is entirely free from the control of the faller-motion, and is actuated by the spring 10, giving the desired quick action irrespective of the speed of the rod a with practical simultaneous engagement with i forming a part of the controlling connection taneously, and in opposite directions.

governed by the taller motion. Thus while the unlocking or release ot the stopping member and its actuator is controlled and brought about by the tallers the actual operation atter unlocking is wholly indepent ent ot the tallers, thereby di'tl'ering absolutely trom prior devices t this character known to me, tor in such devices the tallers at all times directly control and govern the movement ot the stopping device.

The unlocking or release in accordance with my invention is sudden and complete at a specified taller position, and then the parts act independently ot the tallers, but as shown in Fig. 3 the parts involved are so related that any considerable upward movement ot the taller will disengage the stopping member from its cooperating member, tor the pin 22 is at the upper end ot the slot 21, and the first uplitt ot the rod (4 will litt. the member 8 out ot operative position, because the tooth 18 is on the upper surtace ot the stop shoulder 14c- Continued upward movement ot the rod (6 will then cause the tooth 18 to drop down behind and in looking engagement with the shoulder, and the stopping member will be locked, as in Fig. 2. lVhen addi tional upward movement ot the rod a occurs the tooth 18 will slide along the cam surtace 15 as the dog 17 and pawl 8 rock upward in unison about the fulcrum stud T as a center.

The functional movement ot the member 8 when unlocked takes up the lost-motion in the connection between the tallers and the locking device and thereby again places the stopping member 8 under the direct control ot the taller motion, so that the member 8 is rendered inoperative when turther teed ot the quadrant-nut is not demanded, as evidenced by a higher position ot the tension taller. Thus the resetting or looking ot the parts is ettected. lVhile it is not necessary that such re-setting should be effected by or through the taller motion I have in the present embodiment of my invention shown the apparatus so arranged and constructed as to effect the re-setting in a simple and eliicient manner.

In the operation ot the mule, during the winding motion and when the tallers reverse their motion the rolls, the tallers move successively in opposite directions, and during that part ot the winding in which the teed takes place the tallers move simul- The short arm C ot the guide taller moves upward while the long arm B ot the tension taller moves downward, and the descent ot the rod (4 is a ditlerential movement due to the ditterent lengths ot said arms. When the tallers are reversed trom winding to spinning position the tension taller is first depressed and immediately thereatter the winding taller rises and locks the tensiontaller againstturther rise. Under such circumstances rise of the rod (4 is due to the movement ot the shorter arm C through a greater are than that traversed by the arm B. At the time ot winding, or during the teed period, the arm C moves through a comparatively short are and any considerable angular movement ot the arm B acts, on account of its greater radius, to bring about the engagement or disengagement ot the stopping member and its cooperating rotatable member. These movements ot the guide and tension tallers are apparently, but notin practice, contradictory, tor during the teed period the operation ot the stopping member is brought about by the descent ot the tension taller and it may be rendered inoperative by a corresponding rise 0t such tension taller. During the taller change at the rolls the same direction of movement ot the tension taller tor an instant brings about the operation ot the stopping member tor an instant, but it is immediately rendered inoperative and brought to a position ot satety by the immediate rise ot the guide or winding taller.

Broadly speaking, my invention comprehends means to bring about the operation of the teed-motion to rotate the quadrantscrew, and a locking device to lock such means trom operation but which unlocks the same when the tension ot the yarn demands rotation ot the screw, the locking device being rendered inoperative by or through the taller motion at a predetermined or fixed point in the movement ot the tension taller, the means which bring about the operation ot the teed-motion be ing actuated, when unlocked, independently of the tallers. Accordingly my invention is not restricted to the construction and ar- *angement herein shown and described, as the same is a practical embodiment ot the invention selected tor illustration, and changes or modifications may be made by those skilled in the art without departing trom the spirit and scope of my invention as set torth in the claims annexed hereto.

Having tully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a mule, in combination, a reciprocating carriage, a quadrant-screw, an instrumentality including a member rotatably mounted on the carriage to eitect rotation of the quadrant-screw upon stoppage ot rotative movement 0t said member, and stopping mechanism including a stopping member, an actuator directly connected with said stopping member to ettect cooperation thereot with the rotatable member, locking means to restrain the actuator trom operation, and a device governed by the tension ot the yarn and controlling said locking means, to render it inoperative and thereby release the actuator and cause cotlperation of the stopping and rotatable members by or through the actuator.

2. In a mule, in combination, a reciprocating carriage, a quadrantscrew, an instru mentality including a member rotatably mounted on the carriage to ellect rotation of the quadrant-screw upon stoppage of irotative movement of said member, and stopping mechanism including an actuator, locking means to restrain it from acting, and a device governed by the tension of the yarn to unlock said actuator and permit the functional action thereof to operate the stopping mechanism.

8. A mule having a quadrant-screw, and an instrumentality including a rotating member, to effect rotation of the screw by stoppage of rotation of said member, in combination with a stepping member, and a device which normally locks it from movement, but when the tension of the yarn demands rotation of the quadrant-screw unlocks and releases said stopping member and thereby permits the functional movement thereof.

a A mule having a quadrant-screw, and an instrumentality including a normallyquiescent member longitudinally movable to effect rotation of the screw, in combination with means to cooperate with and effect such movement of said member, a device to lock said means from operation, and separate means governed by the tension of the yarn to unlock said first means and permit the operation thereof.

5. A mule having a quadrant-screw, and an instrumentality including a feed-band longitudinally movable to effect rotation of the screw, in combination with a rotatable bandengaging member, a stop to cooperate with said member and hold it from rotation, to thereby efiiect longitudinal movement of the feed-band, a lock to hold the stop inop erative, an actuator connected with and to operatively move said stop when unlocked, and means governed by the tension of the yarn to unlock the stop and cause it to co operate instantly with the band-engaging member.

6. A mule having a quadrant-screw, an instrumentality including a member movable longitudinally to effect rotation of the screw, and a tension taller, in combination with means to effect such movement of said member, an actuator for said means, a device to lock the actuator and restrain it from actuating the said means, and a lost-motion controlling connection between said means and the tension taller, to act upon said device and unlock the actuator and there y cause said means to operate when the taller has reached a predetermined point in its movement, the actuator when thus unlocked being also freed from the control of the taller at such predetermined point in the movement thereof and immediately acting independently of said taller.

T. A mule having a quadrant-screw, an instrinnentality including a member movable longitudinally to effect rotation of the screw, and a tension taller, in combination with means to coiiperate with and effect such movement of said member, a lock to restrain said means from action, and a connection between the lock and the tension taller, to render inoperative the lock and thereby release said means at a definite point in the movement of the taller.

8. In a mule, a quadrant-screw, an intermittingly-acting teed-motion to etlect rotation of the screw, means to cause the feed motion to act, including two relatively movable members one of which is normally sta tionary with relation to and disengaged from the other, and an instrumentality controlled to its operation by the tension of the yarn to cause relative movement and operative engagement of said members when rotation of the quadrant-screw is demanded.

9. In a mule, a quadrant-screw, an intermittingly-acting feed-motion to eilect rotation of the screw, and means to cause the teed-motion to act, including two relatively movable members one of which is normally stationary with relation to and disengaged from the other, and an actuator to eitlect relative movement and operative engage- .ment of said members, combined with an instrumentality controlled as to its operation by the tension of the yarn to bring about the operation of the actuator when rotation of the quadrant-screw is called for.

10. In a mule, a quadrant-screw, an intermittingly-acting feed-motion to eftect rotation of the screw, and means to cause the feed-motion to act, including two relatively movable members one of which is normally stationary with relation to and disengaged from the other, and an actuating spring connected with one 01'? said members to effect their relative movement and operative engagement, combined with an instrumentality controlled to its operation by the tension of the yarn independently of said spring, to bring about the op a ation of the spring when rotation of the quadrant-screw is called for.

11. In a mule, a quadrant-screw, an intermittingly-acting feed-motion to effect rotation thereof, a reciprocating carriage, and means thereon to cause the feed-motion to act, including a ratchet rotated by travel of the carriage when the feed-motion is inactive, and a pawl normally stationary with relation to and disengaged from said ratchet, and a device to hold said pawl stationary combined with an instrumentality controlled as to its operation by the tension of the yarn to release and bring about movement of the pawl into engagement with and to stop rotation of the ratchet when increased yarntension calls for rotation of the quadrant screw.

12. In a mule, a quadrant-screw, an in termittingly-acting feed-motion to effect rotation thereof, a reciprocating carriage, and means thereon to cause the feed-motion to act, including a ratchet rotated by travel of the carriage when the feed-motion is inactive, a pawl to engage the ratchet and stop its rotation, an actuating spring for said pawl, to effec instant engagement thereof with the ratchet, and a pawl-lock which normally locks the pawl out of engagement with the ratchet, but when the tension of the rn demands rotation of the feed-screw releases and thereby permits the functional movementof the pawl.

13. in a mule, a quadrantscrew, an intermittin 'ly-acting feed-motion to effect relation thereof, a reciprocating carriage, and means thereon to cause the feed-motion to act, including a ratchet operatively connected with the feed-motion and running idle when the latter is inactive, a pawl movable into eng gement with and to stop rotation of the ratchet, and a pawl-lock which normally locks the pawl stationary with relation to and disengaged from the ratchet, but when the tension of the yarn demands rotation of the feed-sore releases and thereby permits the functional movement of the pawl.

14. In a mule, a reciprocating carriage, a quadrant-screw, a feed-motion, including an intermittingly active feed-band, to rotate the screw, and means mounted on the carriage to cooperate with and render active said feed-band, said means including ratchet cooperating with the band and ro tated by travel of the carriage, a pawl to engage and stop rotation of the ratchet, an actuating spring to effect such engagement, and a pawl-loch which locks the pawl out of engagement with the ratchet, combined with a tension faller, and a lost-motion controlling connection between it and said pawllock, to cause the latter to unlock the pawl and permitinstant engagement thereof with the ratchetby said actuating spring when the yarn tension demands rotation of the quadrant-screw, the lost-motion connection permitting independent movement of the pawl when the tension faller reaches a pre determined point in its movement, retraction of the pawl from the ratchet and subsequent locking of said pawl being effected through the tension faller.

15. In a mule, a quadrantscrew, a feedmotion to rot-ate it, including an intermittingly active, longitudinally movable member means to effect movement by said mem ber, comprising two relatively movable menr hers one of which is normally held station ary with relation to and disengaged from i the other member, and a device which normally locks the stationary member, but which releases it and permits engagement thereof with its fellow member when rotation of the quadrantscrew is demanded, combined with an instrumentality to disengage automatically said cooperating members and restore one of them to the control of the locking device when rotation of the quadrant-screw is to cease.

16. In a mule, a reciprocating carriage, a quadrant-screw, an instrumentality to rotate it, including a feed-band movable longitudinally to operate said instrumentality, and means on the carriage to effect such movement of the band including two relatively movable members one of which is in engagement with and rotated by said band through travel of the carriage, an actuator to effect relative movement of said members to cause their cooperation and consequent longitudinal movement of the band by stoppage of the member engaging the same, and device which normally prevents relative movement of said members and holds them disengaged, but which releases them and permits their engagement by said actuator y when the tension of the yarn demands rotation of the quadrant-screw, combined with means to thereafter disengage said members and restore them to normal condition under the control of the device which restrains them from relative movement.

1?. In a mule, in combination, a reciprocating carriage, guide and tension fallers carried thereby, a quadrant-screw, mechanism, including a feed-band, to effect rotation of the screw by or through longitudinal movement of the feed-band, means on the carriage to control the operative movement of said band, said means including a springactuated member, and a device to maintain it stationary and inoperative when the feedband is inactive, and a controlling connection between said device and the faller whereby the spring-actuated member is released to perform its functional movement when increased yarn tension demands rotation of the quadrant-screw, said member during its functional movement being entirely free from the control of the faller, subsequent return of the said member to inoperative condition being effected when the yarn tension diminishes.

18. A, mule having a reciprocating carriage, quadrant-screw, and an instrumentality including a member longitudinally movable to effect rotation of the screw, in combination with means to effect such movement of said member and including member movable with and also relatively to the carriage, and a device which normally locks said member from such relative movement, but when the tension of the yarn demands rotation of the quadrant-screw releases and thereby permits the functional movement of said member on the carriage.

19. A mule having, in combination, a reciprocating carriage, a quadrant-screw, an instrumentality including a member adjacent the path of movement of the carriage and movable longitudinally to cttect rotation of the screw, means on the carriage to cooperate with and effect such movement of said member by or through travel out the carriage, a lock normally acting to restrain said means from operation, and other means controlled by the tension of the yarn to unlock said first means and permit the operation thereof.

20. A mule having, in combination, a quadrantscrew, an instrumentality including a normally passive member movable longitudinally to eit 'ect rotation of the screw, means having a periodical bodily movement longitudinally of said member and also having a different functional movement to render said member active, and a device which normally locks said means from functional movement but when the tension of the yarn demands rotation of the quadrantscrew unlocks said means and permits functional movement of the same.

91. In a mule, a reciprocating carriage, a

quadrant-screw, a feed-motion including an intermittingly active member, to rotate the screw, and means mounted on the carriage to at times render said member active, said means including a device movable relatively 35 to the carriage, an actuator to ellect its functional movement and thereby cause said member of the feed-motion to become active, and a lock to hold said device stationary on the carriage and prevent its functional movement, combined with mechanism to unlock and permit the functional movement of said device when the tension of the yarn calls for rotation of the quadrant-screw.

22. In a mule, in combination, a quadrant-screw and a feed-motion, means to bring about the operation of the latter to rotate the quadrant-screw, and a locking device which locks such means from operation, normally, but which unlocks the same automatically when the tension of the yarn de mands rotation of the quadrant-screw.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

l/VILLIAM I). RUNDLETT.

l/Vitnesses JOHN C. EDWARDS, Bnssm G. MORRIS.

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