US2803939A

US2803939A - Apparatus for twisting and winding

Info

Publication number: US2803939A
Application number: US437511A
Authority: US
Inventors: Carlton A Steele
Original assignee: Leesona Corp
Current assignee: Leesona Corp
Priority date: 1954-06-17
Filing date: 1954-06-17
Publication date: 1957-08-27
Anticipated expiration: 1974-08-27

Description

Aug. 27, 1957 Filed June 17, 1954 c. A. STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING mur-I mama g mllllilllll mm mi;

5 Snets-Sheet l WWI i g i IIIIIIIW INVENTOR. CARLTON A. STEELE ATTORNEY jWfD Aug. 27, 1957 Filed June 17, 1954 C. A. STEELE Sheets-Sheet 2 I22 {2Q m us. '26 14! :21 73 1/9 5/ 72 l 52 O 56 f 1 77 J 6/ j, :12 1% 59 as 46 Y I70 4/ 9 4/ I68 3 r I67 43 4a 44 I I64 I66 74 I 33 54 y T 11 77- p, 42 3/ 32 05 a 35 i I78 177 I g I89 is t 19/ gig I59 25 I INVENTOR. Fi -2 F1 -I2 CARLTON A. STEELE ATTORNE Y Aug. 27, 1957 STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING Filed June 17, 1954 5 Sneets-Sheet 3 ummm n nu

INVENTOR. C RLTO A. STEELE F 5 A T TORNE Y Aug. 27, 1957 c. A. STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING Filed June 17, 1954 5 Sneets-Sheet 4 INVENTOR.

CARLTON A. STEELE ATTORNEY A 27, 1957 c. A. STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING Filed June 17, 1954 5 Sneets-Sheet 5 as es 57 HZ I03 [05 l "4 3% m L 83 84 98 II 95 1 1 loo I 88 I02 85 INVENTOR.

CARLTON A. swam:

F1 .8 BY

A TTORNE Y United States l atent O APPARATUS FOR TWISTING AND WINDING Carlton A. Steele, Warwick, R. 1., assignor to Universal Winding Company, Cranston, R. 1., a corporation of Massachusetts Application June 17, 1954, Serial No. 437,511

9'Claims. (Cl. 57-5865) The present invention relates to winding and twisting ,apparatusand more particularly relates to an apparatus adapted to Wind a strand of material at a constant speed and to' impart a uniform twist to the material being wound.

Inthe present specification and claims, the term yarn is usedin a general sense to indicate any type of attenuated material, and the word package is intended to designate thewound mass of yarn whatever its form or shape.

The co-pending application of Dimitri G. Soussloff, Carlton A. Steele and Raymond V. Tata, Serial No. 138,038 filed January 11, 1950 for Method of and Apparatus for Twisting and Winding, now Patent No. 2,715,308, discloses and claims a multiple twist spindle adapted to wind a strand of yarn at a constant speed and to impart auniforrn twist to the yarn being wound. The spindle disclosed in said application Serial No. 138,038 is designed primarily for use as a take-up for a continuous process synthetic yarn spinning machine and, therefore, is provided with means for automatically threading a continuously advancing strand of yarn through the spindle in a very rapid manner so that the twisting and winding operation can be initiated without accumulating any slack yarn.

The spindle of said application Serial No. 138,038 is provided with means driven by a jet of compressed air for initially winding the running strand of yarn' until the spindle. gets up to its operating speed. The jet of compressed air also functions to draw the running strand of yarn into the spindle and to direct it onto the winding arbor. The mechanism incorporated in the apparatus of said application Serial No. 138,038 for Winding the initial run of yarn required a jet of air introduced thereto under a pressure of from 40 to 60 poundsper squarein'ch, whereas the threading operation could be accomplished by a jet of air operating, under a pressure of from 3 to 10 pounds per square inch. The need for relatively high pressure air tooperate the initial winding function necessitated costly and space consuming air compressors which in turn involve a considerable operating expense.

One objectof the present invention is to provide a multiple twist spindle capable of twisting and winding a strand of yarn, said spindle being provided with means for winding said strand of yarn until such time as the spindle has attained its predetermined operating speed.

Another object of the present invention is to provide a multiple twist spindle capable of twisting and winding a strand of yarn, said spindle being provided with an auxiliary motor for driving the winding means until such time as the spindledriving motor is up to its predetermined operating speed.

Another object of the present invention is to provide a multiple twist spindle capable of twisting and winding a strand of yarn, said'spindle being provided with low pressure pneumatic means for threading said strand of yarn into the spindle and having means independent of the pneumatic means for winding said strand of yarn until 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 afuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanyingdrawings wherein:

Fig. l is a side elevation of the apparatus of the present.

invention;

Fig. 2 is an-enlarged front sectional view of the spindle: of the present invention showing the supplementary drive for operating thewinding mechanism while the spindle is coming up to speed;

Fig. 3 is a rear elevation of the winding mechanism of the present invention;

Fig. 4 is a plan view of the spindle of the present invention with some parts in section;

Fig. 5 is a horizontal sectional view taken along the line VV of Fig. 3;

Fig. 6 is a detailed elevational view showing the drive for the ribbon breaker;

Fig. 7 is a view taken on the line VII-VII of Fig. 8;

Fig. 8 is a sectional view taken on the line VIBE-VIII of Fig. 6;

Fig. 9 is aview showing details of the threading tube;

Fig. 10 is a view showing details of the furnishing wheel;

Fig. 11 is a view showing details of the auxiliary thread guide for guiding the initial run of yarn onto a waste roller and subsequent thereto winding a transfer-tail and releasing theyarn for engagement by the traverse yarn guide; and

Fig. 12 is a detailed elevational view, with some parts in section, showing the motor for winding the initial run of yarn until the spindle attains its operating speed and the braking means for that motor.

The present invention comprises an apparatus for twisting yarn and winding the yarn twisted into a self supporting package, and more particularly comprises a multiple twist spindle of the type wherein two turns of twist are imparted to the yarn being twisted for every single revolution of the spindle and the yarn thus twisted is wound into a package inside of the balloon generated by the yarn as it is twisted. The apparatus is particularly adapted for use with continuous process spinning machinery in the manufacture of synthetic yarns. However, it will be obvious to those skilled in the art that the device wizl have many other applications and it is not intended to limit the invention for use with continuous process spinning equipment.

The above mentioned application Serial No. 138,038 discloses and claims a multiple twist spindle adapted to wind a self supporting package inside a balloon generated by the yarn as itis twisted. The disclosed apparatus is provided with a hollow spindle that is adapted to function as an injector to thread a strand of yarn through the apparatus. A supplemental winding cylinder is also provided in the apparatus to wind the initial run of yarn until such time as the spindle attains its predetermined desired speed and, therefore, is imparting the predetermined desired twist to the yarn. The supplemental winding cylinder is so constructed and arranged that the blast of air which threads the spindle also rotates said supplemental winding cylinder.

The present invention provides an improvement over the apparatus of application Serial No. 138,038 in that a supplementary driving means is provided to drive the winding portion of the present apparatus until the spindle comes up to speed thus eliminating the need for high pressure air during the threading and starting operation. The supplementary mechanism comprises a separate electric motor that operates a magnetic coupling to rotate the winding portion of the present apparatus. The supplementary drive is connected to the winding mechanism through an over-running clutch so that when the main spindle motor and twisting spindle is up to speed it can take over the drive of the winding mechanism and the supplementary drive can be stopped.

Referring now to the drawings, there is disclosed at Fig. l a preferred embodiment of the invention comprising the twisting and winding spindle fill mounted upon bed 12 carried by framework 13. An upright post 14 is secured to framework 13 and extends upwardly above spindle It}. A pig-tail guide 15 is secured to post 14 in axial alignment with spindle It) by means of mounting bracket 16. The uppermost end of post 14 carries forwardly extending arm 17 that has guide roller 13 rotatably secured to its forward end. Segment 21 is pivotally mounted on arm 17 adjacent upright 14 by means of pivot pin 22. compensator arm 23 is fixedly secured to segment 21 and extends upwardly past arm 17 and has guide roller 24 rotatably journaled on its free end. Strand of yarn Y, to be twisted and Wound by spindle In, first passes around roller 24.1 then around roller 18 through pig-tail 15 and into spindle it Segment 21 has one end of flexible tape 25 secured thereto. Tape 25 extends downwardly and has its other end connected to the motor speed control mechanism 26, to be explained more in detail hereinafter, so that movement of compensator arm 23 in response to tension changes in strand of yarn Y will actuate said speed control mechanism to slow spindle 10 down when the tension exceeds a predetermined value and to speed said spindle up when the tension is less than said predetermined value.

Spindle iii is preferably driven by a high slip induction motor lid. The shaft 31 of motor 39, see Fig. 2, extends therethrough and forms the twisting spindle of the present apparatus and also drives its winding mechanism. Shaft or spindle 31 is provided with a bore which extends axially throughout its length and is divided into two sections having different diameters. The diameter of lower bore section 3?. is smaller than the diameter of upper bore section 33 to create a suction through bore 43 in fiyer A), to be explained hereinafter, when a stream of air is passed through said spindle. The two

bore sections

32 and 33 come together at a point above the top of motor 36 to form an outwardly facing annular shoulder. Motor 3t? is mounted on bed 12 by means of flange 34,, which forms part of its housing. Resilient vibration isolating block are preferably interposed between flange 34 and bed l1. and around spindle securing bolts 36.

A disc-like fiyer ill, formed from a non-magnetic material, and having an upstanding circumferential flange ii is mounted on, and concentric with, spindle 31 around the annular shoulder formed by the juncture of bore sections 33. and Flyer an is secured to spindle 31 for rotation thereby by means of fiyer hub which engages the spindle and i keyed thereto. A radial bore 4 in fiyer communicates with a radial hole above and adjacent the shoulder in the bore of said spindle to thereby provide a yarn pasage from the periphery of flyer it? into the bore of spindle 331.

A platform for supporting the package being wound and mechanism for winding the package is carried by spindle 31 within the circumferential confines of flange 41 by means of bearings 47. Bearings 47 are held in axial opening 4-8 in platform 46 by means of retaining ring 49. Cylindrical guard 51 is fixedly attached to platform 4-6 at its periphery and functions to prevent the yarn being twisted from catching on the take-up mechanism should the balloon be constricted momentarily for any reason. A plurality of magnets 54 are spaced around motor mounting flange 34 with their pole pieces located closei adjacent the lower surface of fiyer 40. A plurality of magnets 55 are fixed to and spaced around the lower side of platform 46 with their opposite pole pieces in opposition to the poles of magnets 54 whereby the magnetic flux from

magnets

54 and 55 cooperate to prevent platform from rotating with spindle 31.

A frame 56, adapted to support the components which cooperate to wind a self-supporting package of yarn is mounted on the upper surface of platform 46. Frame 56, see Figs. 2, 3 and 5, is preferably a casting comprising left-hand wall 57, right-hand wall 58, intermediatewall 5%, rear-wall 6t) and front-wall 61. Left and

righthand walls

57 and 58 respectively extend rearwardly past rear-wall 6d and have plate 63 secured thereto by means of screws 64-. A top-wall 62

bridges walls

57 and 59 and the extensions of

walls

57 and 58 to enclose the driving mechanism hereinafter described while leaving the axis of platform 46 and spindle 31 open for the passage of the strand of yarn Y in the manner to become apparent hereinafter.

A vertical shaft 66, Figs. 2 and 5, having its lower end journaled in platform 46 by means of suitable bearings and its upper end journaled in top wall 62, is rotated by means of pulleys a7 and 68 carried by shaft 66 and spindie 31 respectively and belt 69. A horizontal shaft 71 is rotatably journaled in front-wall 61 and plate 63 adjacent vertical shaft 65;. The upper end of shaft 66 is provided with a Worm 72 which is meshed with worm wheel 71% carried by shaft "ill. Shaft 71 projects beyond plate 63 and has pulley 74 mounted on the end thus projecting past said plate, the function of pulley 74 will be explained in detail hereinafter. A bevel gear 75 is carried by shaft 71 adjacent worm wheel 73 and is meshed with bevel gear '76 carried by shaft 77 which in turn is journaled in intermediate wall 59. A furnishing or godet wheel 73, Fig. 10, cornprisin a pair of discs having interlaced radial fingers 79 and 8t) is secured to the free end of shaft '77 for rotation therewith and functions to engage the yarn being twisted and wound to relieve the tension therein in a manner that will become more apparent hereinafter. V

A ribbon breaking drive for the winder traverse mechanism and a drive for the auxiliary transfer-tail winding guide (see Figs. 6, 7 and 8) is mounted on plate 63. A pinion gear 33 is fixed to shaft 71 adjacent the inner face of plate 63. Pinion $3 meshes with gear 84 that is fixed to horizontal shaft 85. Shaft 85 has one of its ends journaled in plate 63 and has its other end journaled in support plate 86 that is spaced inwardly from plate 63 by means of bosses 8'7 and is held thereon by means of screws 88. Shaft 85 extends inwardly past support plate 86 and has pinion S9 fixed to this inwardly projecting end. A stub shaft 9%} is fixed to the inner surface of support plate 86 and has

gears

91 and 92 rotatably mounted thereon. Gear 91 is meshed with and driven by gear 89 and gear 92, which is secured to gear 91, is meshed with and drives gear 95. Gear 93 is rotatably journaled in support plate 86 by means of an enlarged drum-like hub 94 that is journaled in said support plate. A crank pin 95, the purpose of which will become apparent hereinafter, is fixed to the outer surface of drum-like hub 94. A gear supporting frame comprising two

arcuate segments

98 and 99 is journaled between plate 63 and support plate 86 by means of bosses filth and till. A short shaft 102 is fixed in boss and carries gear 103 which is meshed with and driven by gear 84. A pin 104 is fixed between

segments

98 and 99 and has wide gear 105 mounted thereon and meshed with gear 103 and with wide gear 106 journaled on pin 1117 also carried by

segments

98 and 99. Short shaft 198 is journaled in boss 101 and has gear 109 fixed'to its innerend and meshed with and driven by wide gear 106. Pulley 110 is fixed to the outer end of shaft 108. A link 111 is pivoted at one of its ends to crank pin 95. The other end of link 11 1 ispivotally attached to segment 98 by means of screw 112. Short shaft 113 is journaled in plate 63 in axial alignment with gear 93 and drum-like hub 94. The innermost end of shaft 113 has crank arm 114- fixed thereto for engagement by crank pin 95 whereby rotation of gear 93 and drum 94' rotates shaft 113 through the engagement of' pin 95 with crank arm 114; Pulley 115 is fixedto the outer end of shaft 113. v

The ribbon breaking drive for the yarn traversing mechanism operates inthe following manner. Shaft 71 is rotated by spindle 31 acting through-

pulleys

67, 68, belt 69, shaft 66 and gears 72 and 73; Shaft 71 by means of gear 83' rotates, gear SW-and shaft 35. Gear 84 rotates gear a 103, and gear 103 operating through

gears

105, 106 and 109 rotates shaft 198. Shaft 85 carries gear 89 which actingthrough gears 91, 92 and 93 rotates crank pin 95, and crank pin 95 acting through link 111 rocks the framework composed. of segments 93' and 99 and gears 103, 1116 and 109 carried thereby. Itwill, therefore, be seen that the rocking movement of

segments

98 and 99 will cause shaft 108 and pulley 110 carried therehyto rotate at increasing anddecreasing speeds so that a traverse mechanism driven by said pulley 110 will operate at a non-uniform rate of speed 'to break ribbons in the manner wellknown in the art.

A multi-groove, traverse cam, not shown,.of a type well known in the art is journaled in housing 119, Figs. 2, 3 and. 4, secured to theupper surface of. frame 56 and reciprocates yarn guide 118 in a manner well known in the art. A package driving roll 12% is rotatably journaled on "a shaft 122 carried by a pair of spaced lugs 121 carried by housing 119. Pulley 123 is fixed to drive roll adjacent one end thereof and between said roll and its adjacent lug, 121. Sprocket belt 124 connects pulley 74 and pulley 123" so that rotation of shaft 71 will rotate package driving roll 124i. Pulley 125 is fixed to shaft 126., by meansofwhich the multiagroove traverse cam is mounted in housing119, and

pulley

110 and 125 are connected by means of. sprocket belt 127 so that rotation of pulley 111), in the above. described manner, will rotate said traverse, cam to-reciprocate guide. 118.

A hanger, for thewinding package of yarn, comprisinga pair of arms 131) and 131 is pivotally secured to bracket 132 upstanding from housing 119 by .means of pivot pin 133. Ann 131 is arranged for manual sliding movement, on pin 133, away from arm to permit the insertion and removal of package core 135 between said :arms. The free end of arm 131 has flanged disc 134 rotatably secured thereon. The diameter-of disc .134 is such that. it willsnugly fit Within one end of package core 1355. Waste roll 137 is, rotatably carried by the free end of arm 130. The. inner most end of waste roll 137 is .of a diameter to snugly fit within the bore of package. core 135 -to cooperatewith flange disc 13.4 to rotatably mount said packagecore for engagement with the periphery of driving roll 120 which will rotate it to wind n package yarn thereon. Anannular. groove. 138 is. provided in the periphery of Waste roll 137. betweenits package core engaging end and its end adjacent arm 1311,- to receive and store the initial run. of yarnpassing into the spindle of thepresent invention.until suchtime as the spindle is up to its predetermined desired. speed.

An upstandingbracket 140, Figs. 3 and 11, having a bifurcated upper-end is. secured to housing 119 between pulley 12.5 andpackage .driving roll 120. Auxiliary yarn guide 141 is journaled in the upper end of bracket and has pulley 142 fixedly secured thereto and located in the bifurcation in. said bracket. A thread or helix 143 is located on the surface of auxiliary guide 141, adjacent bracket 140 and in substantial alignment withannular groove 138 in' waste roll 137'. A yarn engaging pin 144 projects from the surface of auxiliany guide 141 a short distance from the end of thread or helix 143 and inalignmentwith the end portion of packagecore13'5 towind a transfer-tail adjacent theend of said core before" the winding of the package is started. Auxiliary yarn guide 1541 isrotated by means of beltl45 which connects

pulleys

115 and 142.

The base of frame 56 is provided with an opening in alignment with the bore in spindle 31. A tube 149 having a slot 150 formed therein, see Figs. 2, 5 and 9, has one of its ends fixed in said openingnand'extends upwardly at an angle to place its other end adjacent annular groove 138 in waste roll 137. The end of slotted tube 149 ad jacent waste roll 137' is provided with a curved lip 151 to direct a strand of yarn passing through said tube during the threading operation against the periphery of said waste roll.

A source of compressed air is connected to the lower end of spindle 31by means of conduit 152, see Fig. 1, which. is provided with a valve 153. A foot pedal 154 is pivotally secured to framework 13 and has upstanding finger 155 secured thereto in. a. position to engage and open valve 153 when it is depressed by the machine operator. Upst-anding finger 155 also functions to engage electrical switch .156 to close said switch and complete an electrical circuit to energize motor and solenoid 159 for a. purpose to. be explained more in detail hereinafter.

It will be seenthat the structure thus far described" operates in the following manner. Whenit is desired to start and threadthe. mechanism foot pedal I54 is depressed to cause a blastxofairto pass from conduit 152 through the bore of spindle 31" and'up slotted tube 149, and the running strand of yarn Y ispassed downwardly through guide eye 15; located above and in axial' alignment with spindle 31,.and is brought adjacent the end of radial bore 43 in flyer 40. The stream of air passing through spindle 3'1 creates a suction in. radial. bore 43 that draws the running strandof yarn into the bore of spindle 31 where it is picked'up by the moving stream ofair and carried up the spindle bore, through. slotted tube 149'and' impinged against the periphery of waste roll 1'37'111 annular groove 138. Waste roll137is rotated by package core 135 which in turn is rotated by reason of'its engagement with driving I011 120 andlthe running strand of yarn catches on said waste roll and is wound thereon. Driving roll. 120 is rotated, prior to the.starting of motor 30, by means to be described hereinafter. As soon. as the running strand of yarn is caught by waste roll 137 switchS is closedto start motor 30'to rotate flyer 4i), pulley 68 and, through belt 69, pulley 67. As flyer 40 rotates it swings strand Y, as it approaches said flyer, in aballoon orbit that surrounds or encloses supporting platform 46, and all of the components carried thereby, to insert two turns of twist in said strand. for each revolutionof said flyer in the manner well known in the art. As the yarn leaves slotted .tube 149. it passes over auxiliary yarn guide 141 and is engaged'by the thread or helix 143 which guides the running strand into annulargroove 133. Rotation of auxiliary guide 141 causes helix 143 to traverse the run.- ning strand of .yarn to the left as viewedin Figs. 4 and 11. The speed at which auxiliary guide 141 is rotated is such that the yarn is retained by helix 143 until flyer 40 has come up to its predetermined desired speed and is inserting the predetermined desired number of turns oftwist into. said. strand. After the running strand leaves helix 143 it slides along" auxiliary guide 141, due to-the tension in the strand, untilit engages pin 144 which retains the strand for an interval sufiicient to permit a transfer-tail to be wound adjacentthe endof package core 135 whereuponcontinued rotation ofsaid guide 141 causessaid pin to disengage the running strand to. permitwthe;

tension in the strand to move it to the left drawing it out of slot 150 in tube 149. As the strand emerges from slot 150 it is engaged by reciprocating yarn guide 118 which on its next traverse to the left draws said strand completely free of auxiliary guide 141, brings it into engagement with

fingers

79 and 80 of godet wheel 78 and continues with the winding of the pockage. It will be appreciated that annular groove 138 in waste roll 137 can be lined with a pile fabric or with teeth or wire hooks to snag or catch the end of yarn Y when it is first blown thereagainst by slotted tube 149.

Means are provided for driving package driving roll 120, traverse guide 118 and auxiliary yarn guide 141 at a speed sufiicient to wind strand of yarn Y at the speed at which it is being advanced until such time as motor 34) attains its normal operating speed and can take over the winding operation. This starting, or auxiliary, drive, Figs. 2 and 12, comprises starting motor 160, drivingly coupled to package driving roll 120, multigroove traverse cam and auxiliary yarn guide 141 by means of a magnetic coupling that permits flyer 40 to pass between said motor 160 and the above-mentioned components driven thereby. Motor 168 is mounted in housing 158 which in turn is secured by means of bracket 161 to motor mounting flange 34. A stud 162 is fixed in motor mounting flange 34 in axial alignment with vertical shaft 66 and rotatably carries pulley 163 on its upper end. Pulley 163 is rotated by motor 166 by means of motor pulley 164 and belt 165. A permanent magnet 166 is fixed to the upper surface of pulley 163 and rotates therewith. Permanent magnet 167 is fixed to the lower end of vertical shaft 66 by means of disc 168. When motor 160 is energized to rotate magnet 166 the lines of force from that magnet pass through flyer 40 and cooperate with the lines of force from magnet 167 to rotate shaft 66, and shaft 66 in the above described manner, rotates

pulleys

74, 110 and 115 which in turn rotate respectively driving roll 120, reciprocating yarn guide 118 and auxiliary yarn guide 141. Inasmuch as motor 160 is not required to drive flyer 48 it comes up to speed in a very short interval of time so that by the time strand of yarn Y reaches waste roll 137 driving roll 120 is rotating package core 135 and said waste roll at the speed necessary to wind said strand of yarn.

Pulley 67, by means of which vertical shaft 66 is normally driven from motor 30, is connected to said shaft 66 by an over-running clutch 170. Clutch 171) may be any convenient type of over-running clutch that will permit shaft 66 to be rotated by motor 160 while motor 30 and pulley 67 are at rest or are coming up to speed. However, the preferred type of clutch disclosed comprises a collar 171 fixed to shaft 66 adjacent hub 172 forming a part of pulley 67. A helical spring 173 surrounds hub 172 and a portion of collar 171 and the turns of said spring 173 are of the proper hand so that when shaft 66 and collar 171 are rotated at a speed greater than pulley 67 the helix tends to unwind to permit such rotation but when pulley 67 attempts to rotate faster than said shaft 66, fthe helix is tightened to cause said pulley to drive said sha t.

A lever 176 is pivoted at one of its ends to bracket 177 carried by housing 158. Intermediate its ends lever 176 is provided with an opening through which the shaft of motor 160 passes. A brake-surface 174 is fixed to the upper surface of lever 176 to be pressed thereby and by spring 175 against the under surface of pulley 164 to normally prevent rotation of motor 160, pulley 164 and pulley 163. A solenoid 159 is mounted in housing 158 by any convenient means and has its armature connected to the other end of lever 176 by means of link 178. Solenoid 159 is included in the circuit supplying electric current to motor 169 and operates to pull lever 176 downwardly against the action of spring 175, whenever current is supplied motor 160, to release brake-surface 174 from pulley 164. Switch 156 is closed by foot pedal 154 to close the circuit to motor 160 and solenoid 159 at the same time said pedal releases a blast of air through the bore 32 of spindle 31. As soon as strand Y has caught on waste roll 137 the operator closes switch S to energize motor 30. After motor 30 has brought the spindle up to its operating speed the operator removes his foot from lever 154 to thereby shut off the flow of air through spindle 31 and de-energizes motor and solenoid 159. As soon as motor 160 and solenoid 159 are de-energized, spring presses brake-surface 174 against pulley 164 to hold said pulley and magnet 163 against rotation. After magnet 166 is stopped and, therefore, out of phase with magnet 167, the magnetic flux from said two magnets places very little load or drag on motor 30 and magnet 167 will continue to rotate with vertical shaft 66 throughout the entire twisting and winding cycle. It will be understood that magnet 167 and disc 168 can be coupled to shaft 66 through a second over-running clutch if it is desired to prevent the rotation of said magnet 167 when shaft 66 is rotated by motor 30. It will also be understood that switch 156 can be provided with a time delay mechanism, of a type well known in the art, so that lever 154 can be released as soon as the strand of yarn is caught by waste roll 137 to thereby stop the flow of air through spindle 31. In such event the time delay mechanism will keep the circuit to motor 160 and solenoid 159 closed for a predetermined time interval sufficient for motor 30 to reach its operating speed.

Motor speed control mechanism 26 comprises a support member 179, Figs. 1 and 2, that includes a plate 180 secured to lower end of motor 30 by means of screws 181. A combined guard and supporting element 182 is supported by plate 180 and spaced therefrom by means of bosses 183. Motor shaft or spindle 31 extends through plate 181) and terminates adjacent guard and supporting element 182 which holds the end of conduit 152 in alignment with, and closely adjacent to the bore in said shaft or spindle. A non-magnetic metallic disc 185, preferably copper, is fixed to shaft or spindle 31 adjacent its lower end. Horseshoe magnet 186 is carried by one end of an arm 187, formed of nonmagnetic material, by means of yoke 184 and screw 192. The other end of arm 187 is fixedly secured to vertical shaft 188 that is journaled in supporting element 182 so that rocking movement of shaft 188 will pivot arm 187 to cause the poles of magnet 186 to pass over and under disc to varying degrees. Arm 187 can be secured to vertical shaft 188 in any convenient manner, however, it is preferably secured thereto by bending the end of said arm back upon itself to form a yoke 189 having aligned openings therein to pass over said shaft 188. A second yoke 190 also having aligned holes to receive shaft 188 is positioned between the legs of yoke 189 and is caused to grip said shaft 188 by screw 191 which passes through yoke 189 and threadedly engages yoke 190.

Shaft 188 is bent at 90 degrees beneath supporting .element 182 to provide a horizontal length or crank arm 193 beneath said supporting element 182. Flexible tape 25 passes around segment 194, pivotally secured to supporting element 182, and has its end secured to the end of horizontal length 193. A tension spring 195 has one of its ends also secured to the end of said horizontal length and its other end secured to a bracket member 196 carried, by supporting element 182.

As previously explained fluctuations in the tension in strand of yarn Y will cause compensator arm 23 to pivot, i. e. an increase in tension will cause it to pivot in a counterclockwise direction as viewed in Fig. 1 and a decreasing in tension will permit spring 195 acting through flexible tape 25 to rotate it in a clockwise direction. Counterclockwise movement of compensator arm 23, acting through flexible tape 25, horizontal length 193 and shaft 188 moves magnet 186 around metallic disc 185 whereupon the eddy currents generated by the disc passing through the magnetic field of said magnet exert a re: tarding force on motor 30 and slow it down to thereby reduce the winding speed of the mechanism and the tension in the running strand of yarn Y. Conversely a reduction in the tension in strand of yarn Y permits compensator arm 23 to move in a clockwise direction thus causing magnet 186 to move away from disc 185 whereupon the reduced magnetic field brings about a reduction in the eddy currents generated and a consequent lowering in the braking effect applied to motor 30 thus permitting the motor to speed up and thereby wind the yarn at a faster rate and thus increase the tension in strand of yarn Y.

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 drawings shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. A device for twisting and winding yarn comprising a rotatable spindle, said spindle having an opening therein forming a passageway for said yarn, a supporting member mounted on said spindle, means for holding said supporting member against rotation by said spindle, means mounted on said supporting member for holding a winding package of yarn, package rotating means carried by said member, a source of power for actuating said package rotating means and rotating said spindle to cause said spindle to rotate a strand of yarn entering said opening in an orbit that surrounds said supporting member, said package holding means, and said package rotating means, and a second source of power for actuating said package rotating means until said first mentioned source of power is running at its predetermined operating speed.

2. A device for twisting and winding yarn as set forth in claim 1 wherein said second source of power is located outside of said orbit.

3. A device for twisting and winding yarn as set forth in claim 2 including a magnetic coupling connecting said second source of power to said package rotating means.

4. A device for twisting and winding yarn comprising a rotatable spindle, said spindle having an opening therein forming a passageway for said yarn, a supporting member mounted on said spindle, means for holding said supporting member against rotation by said spindle, means mounted on said supporting member for holding a winding package of yarn, package rotating means carried by said member, a shaft for driving said package rotating means, a magnet fixed to said shaft, a second magnet spaced from said first mentioned magnet, means to rotate said second magnet whereby said first mentioned magnet and said shaft are rotated, a source of power for rotating said spindle to cause said spindle to rotate a strand of yarn entering said opening in an orbit that surrounds said supporting member, said package holding means, said package rotating means, said shaft, and said first mentioned magnet and passes between said first mentioned magnet and said second magnet.

5. A device for twisting and winding yarn as set forth in claim 2 having yarn traversing means mounted on said supporting member and actuated by said second source of power.

6. A device for twisting and winding yarn as set forth in claim 4 provided with means permitting said source of power to take over the rotation of said shaft when said source of power for rotating said spindle is at a predetermined desired speed.

7. A device for twisting and winding yarn as set forth in claim 6 wherein said means permitting said source of power to take over the rotation of said shaft in an overrunning clutch.

8. A device for twisting and winding yarn as set forth in claim 6 provided with means to stop the rotation of said second magnet after said source of power takes over the rotation of said shaft.

9. A device for twisting and winding yarn comprising a rotatable spindle, said spindle having an opening therein forming a passageway for said yarn, a supporting member mounted on said spindle, means for holding said supporting member against rotation by said spindle, means mounted on said supporting member for holding a winding package of yarn, package rotating means carried by said member, a source of power for rotating said spindle to cause said spindle to rotate a strand of yarn entering said opening in an orbit that surrounds said supporting member, said package holding means, and said package rotating means, a second source of power located outside of said orbit for actuating said package rotating means, and means whereby said first mentioned source of power can actuate said package rotating means when said first mentioned source of power is rotating said spindle at a predetermined desired speed.

References Cited in the file of this patent UNITED STATES PATENTS 1,907,530 Felier May 9, 1933 2,254,895 Johnston Sept. 2, 1941 2,505,050 Kimball Apr. 25, 1950 2,585,584 Pollock Feb. 12, 1952 2,625,334 Ewing et al. Jan. 13, 1953