US3292358A

US3292358A - Stop motion for winding and twisting machine

Info

Publication number: US3292358A
Application number: US366773A
Authority: US
Inventors: Meglio Joseph E Di; Sandager William
Original assignee: Leesona Corp
Current assignee: Leesona Corp
Priority date: 1964-05-12
Filing date: 1964-05-12
Publication date: 1966-12-20
Anticipated expiration: 1983-12-20
Also published as: GB1093652A; DE1510724A1

Description

Dec. 20, 1966 J. E. DI MEGLIO AL 3,292,358

STOP MOTION FOR WINDING AND TWISTING MACHINE Filed May 12. 1964 INVEN TOR Joiph Dzbleglia VVzZZzam sandafler ATTORNEYS United States Patent Ofi ice Patented Dec. 20, 1966 3,292,358 STOP MOTION FOR WINDING AND TWISTING MACHINE Joseph E. Di Meglio, Providence, KL, and William Sandager, North Dighton, Mass, assignors to Leesona Corporation, Warwick, R.I., a corporation of Massachusetts Filed May 12, 1964, Ser. No. 366,773 7 Claims. (Cl. 5789) The present invention relates to machines for twisting and winding a strand of yarn, and relates more particularly to such a machine having means for stopping the winding mechanism and the twisting mechanism upon the breakage or exhaustion of the strand of yarn being operated upon.

In the following specification and claims the term yarn is employed in a general sense to apply to all kinds of strand materials, either textile or otherwise, and the designation package is intended to mean the product of a winding or twisting machine whatever its form.

. A customary operation in the textile industry is to impart twist to a strand of yarn by rotating a spindle carrying a supply of yarn, drawing the yarn from said supply, and winding the yarn thus twisted into a package by means of a winding mechanism. In recent years multiple twist spindles have been employed in this operation in constantly increasing numbers. It is recognized by those skilled in the art that multiple twist spindles possess advantages over the more conventional single twist spindles in that their \use permits a strand of yarn to be twisted twice as fast as can be twisted on a single twist spindle. However, a major disadvantage inherent in multiple twist spindles is the fact that the supply of yarn carried thereby tends to feed out of the spindle, under the action of con trifiwgal force, and wind resistance in the event the strand breaks between the spindle and the winding mechanism. The constantly feeding broken strand of yarn, which is rapidly rotated by the mechanism, beats against adjacent parts of the mechanism and is thus broken into small fragments which contaminate yarn being twisted by ad jacent spindles and which enters moving parts of the machinery to damage the same.

Attempts have been made in the past to provide multiple twist spindles with yarn trapping devices designed -to permit the strand of yarn being twisted to pass through the spindles so long as the strand remained unbroken, but adapted upon breakage of the strand to catch the yarn and hold it to prevent the above-described feeding thereof. Many of these devices did not function in the manner intended or if they did function they had to be changed or adjusted each time a different diameter yar-n was twisted by the spindle.

It is accordingly one object of the present invention to provide a mechanism for preventing a broken strand of yarn from feeding from a multiple twist spindle.

Another object of the present invention is to provide a mechanism for stopping the operation of a multiple twist spindle upon breakage or exhaustion of the strand of yarn being twisted.

Another object of the present invention is to provide a twisting and winding unit wherein breakage or exhaustion of the strand of yarn being twisted and wound will cause the winding portion of the mechanism to become inoperative and wherein the action of said winding portion in assuming its inoperative position will, concurrently therewith, cause the twisting portion thereof to become inoperative.

Yet, another object of the present invention is to provide a mechanism for stopping the operation of a multiple twist spindle upon breakage or exhaustion of the strand of yarn being twisted thereby, and to prevent the strand of yarn extending from said spindle from further feeding, which said mechanism is fixed in a stationary position to receive and stop the operation of said spindle.

An additional object of the present invention is to provide a mechanism for stopping the operation of a multi ple twist spindle including a brake fixed in a stationary position relative to said spindle, said brake being mounted on a member which permits said brake to self-align with said spindle to thereby stop said spindle effectively without chatter or other vibration from the spindle or brake.

Still a further object of the present invention is to provide a mechanism for stopping the operation of a multiple twist spindle and for preventing a broken strand of yarn from feeding from said spindle which is economical to manufacture and which is durable and reliable in use.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the apparatus possessing the construction, combination of elements and arrangement of parts which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing wherein:

FIG. 1 is a side elevational view of a mechanism embodying the present invention;

FIG. 2 is an enlarged fragmentary side elevational view showing the details of the breaking mechanism of the present invention; and

FIG. 3 is a perspective view of the yarn trapping and spindle breaking members of the present invention, these parts being illustrated in their inoperative positions.

The present invention relates to a machine for twisting and winding a strand of yarn, said machine having one portion thereof comprising .a twisting spindle and another por-tion thereof comprising a winding unit. The winding unit is provided with a knock-01f or stop motion adapted to move a portion of the winding unit to place that unit in a stopped or inoperative position when the strand of yarn being twisted and wound breaks or is exhausted, The winding unit and the twisting spindle are interconnected so that the operation of said stop motion causes the twisting spindle to be disconnected from its driving means and a break to be applied to the spindle to stop its rotation.

The present drawings illustrate one unit of a gang machine comprising a plurality of winding units and twisting spindles all substantially identical and all adapted to be driven from a common source of power. However, it should be understood that each unit can be individually driven if desired and need not be gang mounted.

Referring now to FIG. 1, the individual winding units may be arranged in any suitable number spaced along a frame 10 supported uprightly from 'a base 12 resting on the floor. The winding unit comprises a drive shaft 14 extending the whole length of the machine and being suitably journ-alled in bearings mounted in bearing supports fastened to frame 10, said bearings and bear-ing supports not being herein illustrated. Power transmission means are enclosed in :a casing, not shown, at the head end of the gang machine with power taken from a suitable source such :as an electric motor within the casing. A series of drive-rolls 16 are mounted fast on the horizontal shaft 14 that extends longitudinally of the machine, the rolls being disposed in space relationship corresponding to the spacing of the winding spindles of the several units. Desirably, each drive roll 16 is provided with a frictional annulus such as cork or the like to improve its frictional driving qualities. As illustrated herein, each winding unit of the machine is adapted to wind a package of yarn rotated by surface contact with its respective drive roll 16. The packages of yarn P are normally wound on paper cop-tubes C that serve as cores for supporting the yarn mass. The cop-tubes C are suitably held on winding mandrels or cop-holders 20, each rotatably mounted on a winding spindle 22 supported between bifurcations 23a, 23b at the outer end of a pivoted arm 24. A set screw 25 serves to hold spindle 22 in position between the bifurcations 23a, 23b. The support or pivoted arm 24 for cop-holder 20 may be of the usual construction having an inner end which is rotatably supported on an elongated shaft 26 clamped in bearing supports 28 aflixed to frame 10. Arm 24 is thereby adapted to swing upwardly and permit winding spindle 22 to recede from drive roll 16 during the building of package P on the cop-tube C. A forwardly extending finger or grip 30 serves as a means whereby the operator may manually raise and lower pivoted arm 24 relative to drive roll 16.

A latch bar 32 is rockably supported on a stud 34 em bedded in the intermediate region of pivoted arm 24. The forward end 32a of latch bar 32 lays in juxtaposition with grip 30 so that release of latch bar 32 and manual movement of pivoted arm 24 may be effected as a single motion when the operator grasps grip 30 to lower spindle 22. The rear end of latch bar 32 is formed as a catch 32b. Cooperative with catch 32b is a collar 36 locked onto shaft 26. Collar 36 has a step 36a provided therein, which said step is arranged to receive and seat catch 32b. A spiral spring 38 surrounds stud 34 and is connected at one end to said stud. The opposite end of spring 38 is attached to latch bar 32 and serves to bias the bar counterclockwise about stud 34 (FIG. 1) to urge catch 32b into engagement with the outside diameter of collar 36. It will be apparent that when pivoted arm 24 is rocked to a plane where catch 32b is in register with step 36a, the catch will snap into engagement with the step under the biasing force of spring 38 to thereby hold spindle 22 in an elevated position off :of drive roll 16.

The yarn breakage or exhaustion detecting means is constituted as a yarn engaging bail 40 projecting parallel to the axis of spindle 22 and disposed somewhat forwardly of drive roll 16. Bail 40 is affixed, .at one of its ends, to a stilt rod 42. In turn, rod 42 is rockably supported on a pin 44 pierced through a tab 46 integral with and depending from the lower central section of pivoted arm 24. Rod 42 is affixed to a lever 46 which is also rockable on pin 44 and which depends from pin 44 at substantially a right angle to rod 42. Lever 46 has a shoulder formed therein at 48, the purpose of which will be related hereafter. Rod 42 is normally held in its operative position in a generally horizontal plane, essentially parallel to pivoted arm 24, by virtue of the support derived from a strand of yarn passing over bail 40 as the yarn flows from its supply source to package P. For operative purposes to become apparent hereafter it is necessary that bail 40 and lever 46 rock clockwise about pin 44 to arrest operation of the winding unit when the yarn breaks or the supply becomes exhausted. To this end an arcuate arm 50 is connected integrally with rod 42 and lever 46 on pin 44, said arm 50 extending rearwardly from pin 44. The outer end of arm 50 mounts a counterweight 52. Hence, in the absence of yarn passing over bail 40 and serving to constrain the bail in a depressed position as shown in FIG. 1, counterweight 52 operates to rock rod 42 generally upwardly around pin 44, thereby causing bail 40 to lift, and causing lever 46 to swing forwardly around said pin.

A rocker arm 56 is suitably journalled for oscillating motion on a shaft 58 extending the length of the machine and secured in bearings 60 carried on frame 10. The rearward end of rocker arm 56 is connected to a reciprocating rod 62 which is, in turn, connected to power haustion of the yarn strand passing over bail 40, the

counterweight 52 acts to rock lever 46 against striker 64 thereby disposing shoulder 48 in the plane of movement of striker 64. On the next succeeding upward pick or stroke of striker 64, the striker hits shoulder 48 driving pivoted arm 24 upwardly whereupon catch 32b snaps into step 36a to hold the package P away from drive roll 16, thereby ceasing the winding action of the winding unit. It will be apparent that once striker 64 and shoulder 48 have operated to lift arm 24 it is desirable to remove lever 46 from the plane of motion of rockerv arm 56, simply so striker 64 will not continue to strike shoulder 48 on each succeeding upward stroke. To this end an appendage 66 is connected fast onto pin 44. An

elongated finger 68 is fastened as by screw 69 to hearing support 28 and projects into the rotary plane of movement of appendage 66. In consequence of pivoted arm 24 being raised or swung clockwise about shaft 26, appendage 66 is brought into contact with finger 68. As a result thereof, finger 68 depresses appendage 66 thereby rocking lever 46 counterclockwise on pin 44 (FIG. I) to a position where shoulder 48 is removed from the plane of striking motion of striker 64.

The twisting unit of the present invention is generally designated at 70 and is generally similar to the multiple twist spindle unit disclosed in US. Patent No. 2,478,926, issued August 16, 1949, to C. B. Kingsbury et al. The twisting unit includes a stationary holder 72 within which a package of unt-wisted yarn, not shown, is supported on a spindle 74. A bonnet '75 is supported in a rim around the holder 72 and acts .as a balloon guard for the yarn unwinding from the package. The twister unit 70 operates in the manner described in the patent just cited to deliver a strand of yarn radially outwardly through an eye 76 in a rotatable fiyer or disc rotor 78 at the base of the Winding unit to thereby twist the, yarn as described in the patent. The twisted yarn is drawn by a furnishing roll 80 rotatably carried on a shaft 82,

the yarn being drawn through a centering, balloon restricting guide 84 disposed between the furnishing roll 80 and eye 76. The yarn is advanced from the furnishinlg roll 80 under a guide bar 85 and over bail 40 to the winding unit which has already been described. Shaft 82 which supports furnishing roll 80 extends the full length of the machine and is mounted in suitable bea r in gs appropriately spaced and carried in upright stanchions along the machine, the stanchions and bearing supports being omitted in the present drawing.

The spindle 74 serves as a mount for rotor 78. In

turn, spindle 74 is supported in a spindle bolster 85.

The lower section of spindle 74 has a whorl 88 formed therein. A belt 90 is driven by any convenient source of power located at the head end of the machine, such source not being illustrated herein. Belt 90 is of the endless type and passes along the length of the machine, normally in driving contact with each of the spindle whorls. Thus as belt 90 is driven each spindle 74 and each rotor 78, both of which are connected on said spindle whorl 88, is driven in a manner well known in the art. A plurality of spaced idler pulleys 92 are carried on a horizontal rail 94 in back of belt 90 to guide the belt and to apply a force opposing the thrust of wh-orl 88. Horizontal rail 94 may be suitably supported from the stanchions which have already been described,

asspaced along the machine in an upright position.

Spindle bolster 86 is supported in thelower end of an L-shaped arm 96 by any convenient means. L-shaped arm 96 is pivoted at its uppermost end on a pi-ntle 98 supported in a bracket 100. In turn, bracket 100 is attached to and carried by an elongated tubular bar 102 secured in a clamp unit 104. Said clamp unit 104 is fastened to the spaced stanchions, already mentioned.

L-shaped arm 96 has a wear-resistant pad 106 aflixed on its rear surface approximately midway along its vertical extension. A bell-crank 108 is rockably supported on a stub shaft 110 embedded in the rear-most end of an arm 112 supported on rail 94. The upper end of bellcrank 108 has a roller 114 thereon, this roller laying against the surface of pad 106. The rearward angular extension of bell-crank 108 is provided with a roller 115 loosely carried on a pin 116 connected to the outer, rearward end of the bell crank 108. An elongated rod 118 is connected at its upper end to stud 34 and is loosely engaged at its lower end with roller .115 for axially movement relative thereto. Desirably, the lower end of rod 118 is provide with a threaded section accommodating a nut 119, said nut being adjustable axially along rod 118, nut 119 is set in a position spaced below roller 115 in order to provide a lost motion connection between bell crank 108 and rod 118. It will be apparent that as pivoted arm 24 is raised in the fashion already related rod 118 will be lifted, thereby rocking roller 114 against pad 106. This action causes L-shaped arm 96 to be pushed clockwise about pintle 98, FIG. '1, thereby shifting whorl 88 forwardly of and away from belt 90. In consequence thereof the driving power is removed from the twister unit 70 simultaneously with package P being lifted off drive roll 60 in response to y-a rn breakage or yarn exhaustion. A spring 120 connected at one of its ends to frame .and at the other end to L-shaped arm 96 serves to urge said arm 96 counterclockwise to bias whorl 88 into driving engagement with belt 90 when pressure from roller 114 is released from said L-shaped arm.

As the twister unit 70 is rocked from its driving position on belt 90, as just described, it is highly desirable that the bolster 86 be braked in order that the yarn not be fed out of eye 76 by centrifugal force and, further, to arrest rotation of the twister unit to afford the operafor an opportunity to repair the yarn break or to replace the exhausted supply. Further, it is advantageous to trap the supply yarn end flowing out through eye 76 in order that this end will not become entangled with adjacent machine parts and belt 90. To these ends a pair of resilient, generally right

angular members

121, 122 are connected at their inner ends to the lower, outer end of L-shaped arm 96. Desirably, a bolt, not shown, passes through elongated slots in

members

121, 122 so that these members may be adjusted inwardly and outwardly relative to L-shaped arm 96. A brake shoe 124 is affixed in a stationary position to the upper end of member 121, the brake shoe laying in the plane of rotary movement of whorl 88. Said brake shoe 124 has a radius of curvature conforming to the curvature of the diameter of whorl 88 and said brake shoe lies in the plane of said whorl for frictional gripping contact therewith. A frictional pad .126 of leather or the like is secured to the face of brake shoe 124 and assumes the curvature thereof to effectively arrest rotation of the whorl 88 rapidly when the whorl is pressed thereagainst.

An angular support-plate or stabilizer 128 is fastened at its inner end to rail 94 by a bolt 129 which passes through an elongated slot in said stabilizer to afford slidable movement of said plate. The outer end 128a of stabilizer 128 is formed at a right angle to the main leg of said stabilizer. This right angular end 128a is disposed to lay against the side of member 121 remote from the side of said member mounting brake shoe 124 so that, as whorl 88 is pivoted outwardly or forwardly on L-shaped arm 96 as already described, the whorl contacts brake shoe 124 and causes said member 121 to bear firmly against the right angular end 1284 of stabilizer 128. At this time the frictional action of brake pad 126 arrests rotation of the whorl. The advantageous arrangement by which brake shoe 124 is carried on resilient member 121 permits the brake shoe to align with the whorl 88 for braking purposes. By virtue of this self-aligning feature, full contact of the brake shoe 124 with whorl 88 is assured. Thus, efli-cient and chatter-free operation of the brake shoe is achieved. Additionally, adjustment of spatial relationship of brake shoe 124 and angular end relative to whorl is adjustable by means of the slidable movement afforded by the mounting of member 121 and stabilizer :128, respectively.

A further support plate or stabilizer 130 is affixed to stabilizer 128, as by a weld, and is slidable therewith. The right-angular end 1300 of stabilizer 130 is turned to lay against the outer side of member 122. The upper end of member 122 has an extension 132 aflixed thereto by screw 134. The upper end of extension [132 mounts a pad 136 of frictional material such as felt. Pad 136 lays in the general plane of movement of eye 76. As spindle unit 70 swings forwardly, as previously described, the lower end of rotor 78 having eye 76 therein, is contacted by pad 136. As rotor 78 pushes pad 136, during its forward swinging motion on L-shaped arm 96 as previously described, member 122 is propped against stabilizer 130. If the interruption in winding has occurred due to breakage in the supply yarn between eye 76 and the winding unit, the supply yarn is effectively trapped between pad 136 and the side of rotor 78. Thus, in such event further feeding of the supply yarn which may otherwise occur by centrifugal force through eye 76 is prevented.

A brief overall description of the foregoing apparatus will now be presented. Strand of yarn Y is threaded through the twister unit 70 in the known manner and is withdrawn outwardly therefrom through eye 76 of rotatable rotor 78. The yarn is drawn upwardly passing through guide 84, over furnishing roll 80, under guide bar 85, the yarn thereafter being directed over bail 40 and wrapped about cop tube C. Thereafter, as drive roll 16 is rotated from shaft 14 winding of the yarn is commenced by lowering pivoted arm 24 to place cop tube C in peripheral contact with the drive roll. With the commencement of rotation of drive roll 16, furnishing roll 80 is-driven to advance yarn from the twister unit 70 to cop tube C. It will be understood that simultaneously with the commencement of the rotation of

shafts

14 and 82 the means for operating rocker arm 56 will also be energized whereupon the rocker arm will begin to pick or reciprocate on shaft 58 in the manner previously described. Further, whorl 88 of twister unit 70 will be in driving contact with belt 90, the belt, in turn, being driven concurrently with operation of drive roll 16 and furnishing roll 80. In consequence thereof the spindle 74 of the twister unit, and rotor 78, will be rapidly rotated to impart twist to the yarn being wound. The twisted yarn will be taken up on cop-tube C. As the package diameter increases pivoted arm 24. will gradually swing clockwise around shaft 26. Rod 118 will lift in response to movement of pivoted arm 24. Yet, bell crank 108 will, during winding, remain stationary since the lost motion con nection afforded by the spacing of nut 119 relative to roller permits rod 118 to move upward to some extent before nut 119 contacts roller 115. In the event that the strand of yarn Y should break during its movement from the supply source to cop tube C, or, on the other hand, if the supply should become exhausted, bail 40 will be released from the pressure of the yarn which normally serves to hold it down. As a result thereof rod 42 will be permitted to rock clockwise about pin 44, see FIG. 1, this movement being assisted by the overbalancing effect of counterweight 52. This causes shoulder 48 of lever 46 to swing clockwise or forwardly about pin 44 into the operative path of striker 64. Thereafter, on the next upward stroke of striker 64, the striker hits shoulder 48 thereby pushing pivoted arm 24 upwardly or clockwise about shaft 26. Catch 32b acts to engage in step 36a to hold the pivoted arm upwardly so that the package is spaced away from drive roll 16 to prevent further rotation of said package from the drive roll. As pivoted arm 24 is pushed upwardly in the manner just described rod 118 is also lifted causing bell crank 108 to pivot in a counterclockwise direction about its stub shaft 110. This results in L- shaped arm 96 being swung clockwise about pintle 98 to rock twister unit 70 forwardly so as to remove whorl 88 from driving engagement with belt 90. Thus, the driving power for the twister unit 70 is removed. Simultaneously with the forward swinging moment of twister spindle 70 whorl 88 engages with brake shoe 124, the brake shoe being self-aligning with said whorl and being pressed against stabilizer *128. Thus, the pressure of the twister spindle unit in a forward direction causes the whorl 88 to bear on brake shoe 124, the brake shoe, in turn, being supported against end 128a whereupon the brake is elfective to arrest rotation of the twister unit 70. Moreover, rotor 78 is engaged by pad 136, this pad bearin on the rotor in the plane of the yarn feeding eye 76. If the yarn interruption has occurred as a result of a break in the yarn between the eye 76 and the winding unit the yarn tail which projects through eye 76 is eifectively trapped between pad 136 and the side of rotor 78, the length of yarn being wrapped around the periphery of the rotor. Thus, the yarn is prevented from entangling with the driving belt and the adjacent parts of the machine.

Since certain changes may be made in the above apparatus without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative only and not in a limiting sense.

What is claimed is:

1. A machine for twisting and winding a strand of yarn comprising, a rotatable spindle for supporting'a yam supply, said spindle having a whorl, drive means engageable by said whorl for rotating said whorl and spindle to impart twist in a strand of yarn drawn from said supply, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a takeup roll carried on said arm, a drive roll for engaging and rotating said take-up roll to wind yarn on said take-up roll; reciprocable stop motion means operable in the absence of yarn flowing from said supply to said take-11p roll to pivot said arm to disengage said take-up roll from said drive roll, means for reciprocating said stop-motion means, a linkage connected with said arm and movable therewith to move said whorl out of engagement withsaid drive means as said arm is pivoted to disengage said takeup roll from said drive roll, and a stationary brake positioned to receive said whorl upon disengagement from said drive means to arrest rotation of said spindle.

2. A machine for twisting and winding a strand of yarn comprising, a rotatable spindle for supporting a yarn supply, said spindle having a whorl, drive means engageable by said whorl for rotating said whorl and spindle to impart twist in a strand of yarn drawn from said supply, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a take-up roll carried on said arm, a drive roll for engaging and rotating said take-up roll to wind yarn on said take-up roll; a reciprocating member, means for reciprocating said member, a lever depending from said package support arm, said lever being disposed in a first position spaced from said reciprocating member during winding of yarn from said supply to said take-up roll, said lever being movable to a second position engageable with said reciprocating member whereby to pivot said arm to disengage said take-up roll from said drive roll in the absence of yarn flowing from said supply to said take-up roll, latch means for retaining said arm in said disengaged position, a resilient member for resetting said lever to said first position when said arm is engaged with said latch, a linkage connected with said arm and movable therewith to move said whorl out of engagement with said drive means as said arm is pivoted to disengage said take-up roll from said drive roll, and a stationary brake positioned to receive said whorl upon disengagement from said drive means to arrest rotation of said spindle.

3. A machine for twisting and winding a strand of yarn comprising, a rotatable spindle for supporting a yarn supply, said spindle having a whorl, drive means engageable by said whorl for rotating said whorl and spindle to impart twist in a strand of yarn drawn from said supply, a pivotal-, ly mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a take-up roll carried on said arm, a drive roll for engaging and rotating said take-up roll to wind yarn on said take-up roll; a reciprocating member, means for reciprocating said mem-. her, a lever depending from said package support arm, a

bail connected with said lever, said bail being engageable by said strand of yarn flowing from said supply to said take-up roll to dispose said lever in a first position spaced from said reciprocating member, said bail being rockable in the absence of yarn flowing from said supply to said take-up roll to move said 'lever to a second position engageable with said reciprocating member whereby to pivot said arm to disengage said take-up roll from said drive roll, a counterweight for rocking said bail to move said lever to said second position, latch means for retaining said arm in said disengaged position, a resilient member for resetting said lever in said first position when said arm is engaged with said latch, a linkage connected with said arm and movable therewith, to move said whorl out of engagement with said drive means as said arm is pivoted to disengage said take-up roll from said drive roll, and a stationary brake positioned to receive said whorl upon disengagement from said driving means to arrest rotation of said spindle.

4. A machine for twisting'and winding a strand of yarn comprising, a rotatable spindle for supporting a yarn sup-, ply, said spindle having a whorl, drive means engageable by said whorl for rotating said whorl and spindle to impart twist in a strand of yarn drawn from said supply, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a take-up roll carried on said arm, a drive roll for engaging and rotating said take-up roll to wind yarn on said take-up roll; reciprocable stop motion means operable in the absence of yarn flowing from said supply to said take-up roll to pivot said arm to disengage said take-up roll from said drive roll, means for reciprocating said stop motion means, a linkage connected with ,said arm and movable therewith, said linkage being operable to move said whorl out of engagement with said drive means as said arm is pivoted to disengage said take-up roll fromsaid drive roll, a stationary brake positioned to receive said whorl upon disengagement from said drive means, and self-aligning means carrying said brake whereby said brake aligns with said whorl when contacted thereby to arrest rotation of said spindle.

5. A machine for twisting and winding a strand of yarn comprising, a rotatable spindle for supporting a yarn supply, said spindle having a whorl, drive means engageable by said whorl for rotating said whorl and spindle tQ impart twist in a strand of yarn drawn from said supply, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a takeup roll carried on said arm, a drive roll for engaging and rotating said tape-up roll to wind yarn on said take-up roll; stop motion means operable in the absence of yarn flowing from said supply to said take-up roll to pivot said arm to disengage said take-up roll from said drive roll, a linkage connected with said arm'and movable therewith, said linkage being operable to move said whorl out of engagement with said drive means as said arm is pivoted to disengage said take-up roll from said drive roll; a stationary brake, said brake including a pad of frictional material having a braking surface with a radius of curvature conforming to the curvature of said whorl, a self-aligning means carrying said brake; said whorl being engageable with said pad during its disengaging movement, said self-aligning member being responsive to engagement of said whorl with said pad to align said pad with said whorl whereby substantially the full braking face engages with said whorl to arrest rotation of said spindle.

6. A machine for twisting and winding a strand of yarn comprising, a rotatable spindle for supporting a yarn supply, said spindle having a whorl and a rotor atfixed thereon, said rotor having an eye therein to provide a passage for a strand of yarn drawn from said supply .to be twisted, drive means engageable with said whorl to rtate said whorl spindle and rotor, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a take-up roll carried on said arm, a drive roll for engaging and rotating said takeup roll to wind yarn on said take-up roll; stop motion means operable in the absence of yarn flowing from said supply to said take-up roll to pivot said arm to disengage said take-up roll from said drive roll, a linkage connected with said arm and movable therewith, said linkage being operable to move said whorl out of engagement with said drive means as said arm is pivoted to disengage said takeup roll from said drive roll; a stationary brake positioned to receive said whorl upon disengagement from said drive means, a self-aligning means carrying said brake whereby said brake aligns with said whorl when contacted thereby to arrest rotation of said spindle; and stationary yarn catching member positioned in the plane of movement of said eye, said yarn catching member being operable to engage said strand of yarn passing through said eye as said whorl engages said brake to wrap the yarn around said rotor and prevent the yarn from feeding through said eye.

7. A machine for twisting and winding a strand of yarn comprising, a rotatable spindle for supporting a yarn supply, said spindle having a whorl and a rotor, aflixed thereon, said rotor having an eye therein to provide a passage for a strand of yarn drawn from said supply to be twisted, drive means engageable with said whorl to rotate said whorl, spindle and rotor, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said drive means and to disengage said whorl therefrom; winding means including a pivotally mounted package support arm, a take-up roll carried on said arm, a drive roll for engaging and rotating said takeup roll to wind yarn on said take-up roll; stop motion means operable in the absence of yarn flowing from said supply to said take-up roll to pivot said arm to disengage said take-up roll from said drive roll, a linkage connected with said arm and movable therewith, said linkage being operable to move said whorl out of engagement with said drive means as said arm is pivoted to disengage said takeup roll from said drive roll; a stationary brake positioned to receive said whorl upon disengagement from said drive means, a self-aligning means carrying said brake whereby said brake aligns with said whorl when contacted thereby to arrest rotation of said spindle, a stationary yarn catching member positioned in the plane of movement of said eye, said yarn catching member being operable to engage said strand of yarn passing through said eye as said whorl engages said brake to wrap the yarn around said rotor and prevent the yarn from feeding through said eye, a first support plate arranged to hold said brake in said stationary position, and a second support plate for retaining said yarn catching member in said stationary position.

References Cited by the Examiner UNITED STATES PATENTS 2,5 84,096 1/ 1952 Thomas 57-80 2,599,256 6/ 1952 Hartley et a1 5780 X 2,786,324 3/ 1957 Keith et a1 57-89 FRANK J. COHEN, Primary Examiner.

D. E. WATKINS, Assistant Examiner.

Claims

1. A MACHINE FOR TWISTING AND WINDING A STRAND OF YARN COMPRISING, A ROTATABLE SPINDLE FOR SUPPORTING A YARN SUPPLY, SAID SPINDLE HAVING A WHORL, DRIVE MEANS ENGAGEABLE BY SAID WHORL FOR ROTATING SAID WHORL AND SPINDLE TO IMPART TWIST IN A STRAND OF YARN DRAWN FROM SAID SUPPLY, A PIVOTALLY MOUNTED SUPPORT FOR SAID SPINDLE SWINGABLE TO SELECTIVELY ENGAGE SAID WHORL WITH SAID DRIVE MEANS AND TO DISENGAGE SAID WHORL THEREFROM; WINDING MEANS INCLUDING A PIVOTALLY MOUNTED PACKAGE SUPPORT ARM, A TAKEUP ROLL CARRIED ON SAID ARM, A DRIVE ROLL FOR ENGAGING AND ROTATING SAID TAKE-UP ROLL TO WIND YARN ON SAID TAKE-UP ROLL; RECIPROCABLE STOP MOTION MEANS OPERABLE IN THE ABSENCE OF YARN FLOWING FROM SAID SUPPLY TO SAID TAKE-UP ROLL TO PIVOT SAID ARM TO DISENGAGE SAID TAKE-UP ROLL FROM SAID DRIVE ROLL, MEANS FOR RECIPROCATING SAID STOP-MOTION MEANS, A LINKAGE CONNECTED WITH SAID YARN AND MOVABLE THEREWITH TO MOVE SAID WHORL OUT OF ENGAGEMENT WITH SAID DRIVE MEANS AS SAID ARM IS PIVOTED TO DISENGAGE SAID TAKEUP ROLL FROM SAID DRIVE ROLL, AND A STATIONARY BRAKE POSITIONED TO RECEIVE SAID WHORL UPON DISENGAGEMENT FROM SAID DRIVE MEANS TO ARREST ROTATION OF SAID SPINDLE.