US2786324A - Two-for-one stop motion - Google Patents

Description

March 26, 1957 J. v. KEITH ETAL 2,786,324

TWO-FOR-ONE STOP mm 4 Sheets-Sheet 1 Filed Nov. 16, 1953 INVENTOR. JOHN v KEITH BY KENNETH KIRKMAN' ATTORNEY March 26, 1957 .1. v. KEITH ETAL 2,786,324

TWO-FOR-ONE STOP MOTION 4 Sheets-Sheet 2 Filed Nov. 16, 1953 INVENTOR. JOHN V KEITH KENNETH D. KIRK MAN AT TORNE Y Filed Nov. 16, 1955 March 26, 1957 v KElTH r 2,786,324

TWO-FOR-ONE STOP MOTION 4 She ets-Sheet s INVENTOR.

-JOHN M KEITH BY KENNETH D. KIRKMAN ATTORNEY Mare 26, 1957 J, v. KETH EAL 2,786,324

TWO-FOR-ONE STOP MOTION 4 Sheets-Sheet 4 Filed Nov. 16, 1953 Pm N1 wt INVENTOR. JOHN V KEITH BY KENNETH D. K/RKMAN AT TORNE Y United States Patent M 2,786,324 7 Two-FoR-oNE STOP MOTION John V. Keith, Warwick, and Kenneth D. Kirkinan, Norwood," R. I., assignors to Universal Winding Company, Cranston, R; 1., a corporation of Massachusetts A plicant]: November 16, 1953 Serial No. 392,328 Ciaims.- (Cl. 57*89) The present invention relates to am'achine for twisting and winding a strand of yarn, and more particularly pertains to such a machine havin'g'nieans' for stopping the winding mechanism and the twisting mechanism upon the breakage or exhaustion of the strand of yarn being opera'te'd upon. 7 t

In the following specification and claims the term rn 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 the winding 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 windin g'the yarn thus twisted into a package by means of a winding mechanism. In recent years, multiple twist spindles have been employed inflthis operation in constantly increasing numbers. It is recognized by those skilled in the art thatni'ultipl'e twist spindles possess advantages over the more conventional single twist spindles inasmuch as their use" permits a strand of yarnto be twisted twice as fast as it' can be twisted on a single twist spindle. However, a major disadvantage inherent in"multiple twist spindlesis the fact that the supply of yarn carried thereby tends to feed out of the spindle, under the action of centrifugal force, and wind resistance in the event the strand breaks between the spindle andthe winding mechanism; The constantly feeding broken strandof yarh, which is rapidly rotated by the spindle, beats against adjacent parts" ofthef'nfiech anism and is thus broken into' srriall' fragments which con tami-nate' yarn being twisted: by adjacent spindles a T which enter moving'paits of't'he" machinery'to' daii'i g'e the same.

Attempts have been made in thepa st to providen'iiil tiple twist spindles with yarn trapping devices" des'igh'edto permit the strand of yarn; being't'wistedto pass through the spindle solong as' said strand reni a'inedunbroken, but" adapted upon breakage of the'strand to catc and hold it to p'rev'ent the' abovef described feedingthereotl Many of these devices didndtfuiictioriin the mannef' intended, or if they didfunctio'n they had'to' befchanged r'adjusted' each time a different diameter yarn wartwisredey the spindle. Y I I. Y I

It is accordingly one object oftlie' resent iiiven'tio'n to provide a mechanism for preventing a brokemst'rand of yarnfr'om' feeding from 'a'multiple twistspindle.

Another object of the present invention is to provide a mechanismforstoppingsthe operati0n;.of a.-mul ti'pleE twist spindleupon breakage or exhaustion of the strandof yarn being twisted.

Another object of present inventien is.

a twisting and windingi machine wherein breakage or ex- 2,786,324 Patented Mar. 26, 1952 Other objects of the invention will in part be obvious and will in part appear hereinafter. 1 v M v The invention accordingly comprises the apparatus pos sessing the construction, combination of elements and arrangement of parts which are exemplified inathe'f ol-v lowing detailed disclosure, and the scope of the application of which will be indicated in the claims, A v For a fuller understanding of the nature and objects of the invention, reference should be had to the follow, ing detailed description taken in connection with the .accompanying drawings wherein; V Fig. .1 is afront elevation of a the-present invention; :.r s 2 Fig. 2 is a side elevation corresponding to Fig, 1;-;:;;; .Fig. 3 is an enlarged fragmentary side elevation show-3 ing the twisting spindle of Figs. 1 and 2 inoperative p9 sition and showing the mechanism for disconnecting and stopping said spindle; I V v I; Fig. 4 is a view similarto Fig. 3 but showing the twistmg spindle in its inoperative position; 1

Fig. 5 is an enlarged fragmentary front elevation shqw; in; the mechanism for stopping the operationof the winding portion of the machine; 1 Fig. 6 is a view similar to Fig 5:;b ut showing the stopmecha'riism attestin ping mechanism in its tripped position;

' motion adapted to move a portion of the windingunit to place that unit in a stopped or inoperative condition when the strand, of yarn being twisted and Woundbre or isnexhauste'd. The winding unit. and the tw ls spindle are interconnectedso that operation of said stop motion causes the twisting spindle to be disconnectecl from its driving means and abrake to be applied to the spindle to stop its rotation. r H

, ,Thelpresen't drawingsillust'rate one unit of a I ang machine" comprising a plurality oflwindi n ghuni ,add twisting spindles all substaptially identical and all aaa'p'tes' to be driven from a common source of ,power. How,- ever; it should be understood that each unit can be vidually driven. if desired and need not b'e angmomiied;

Referring, now to Figs. 1 through 6 of the drawings. wheiein there is disclosed one form of the present raven-T n I j I f Figs}. 1 through 6 is similar tov the windingunit disc sedv in the co-pending application for United States Letters Patent SerialNo. 222,807, filed April 25, 1951,by"I..Y. forTwisting and .Winding" Machine. ,Theref6f, only somuch of the winding' rnechanism as i'sfn I y. fora complete understanding of the p'resentinvention will be describedherein." The twisting spindle? i sclosedl inthernodification of Fig's'. 1 through 6 is similar t the multiple; twist spindle disclosed in'U. 5; Patent N 8;} 2,478,926 and2,478,928 issued' Aug'ust l 6, 1 9 49,"t'o 4. Kingsb 'iry and R. H. Carter etali respectively, 1th only so much of thesespindles will'be describe or as' is' necessar'y for a'complete understandingof the pres entinvention. H

The 'windi ng unit comprises a housing 153i se 7 aninverted channel member 12 which f: h s ported'by legs lid. A't-raverse n ecliani journaled in housing 16 with one of its ends projecting from the front of said housing and carries thereon star wheel 20. Shaft 18 and star wheel 24) are rotated in a clock-wise direction as viewed in Figs. and 6 by the same source of power which operates spindle 16. A shaft 22 is journaled in housing 16 with one of its ends projecting from the front thereof and is manually rockable by means of handle 24. The inner end of shaft 22 is connected to a clutch, not shown, for coupling the yarn traversing mechanism, spindle 1.6 and shaft 18 to their driving source of power when said shaft is rocked in a clockwise direction as viewed in Figs. 1, 5 and 6 and for disengaging said clutch when said shaft is rocked in a counter-clockwise direction.

. A spring, not shown, located inside of housing resiliently urges shaft 22 in a counter-clockwise direction and means are provided for holding said shaft against counter-clockwise rotation while a strand of yarn is being wound. An elbow-shaped lever 26 is rigidly attached to shaft 22 adjacent the front surface of housing 10 and has its left hand end bifurcated to form two fingers. One of these fingers is bent rearwardly at right angles to lever 26 to form a latch shoulder 28, see Fig. 6, the other finger is bent forwardly at its tip to form breakage lever engaging lug 30. A generally triangular latch keeper member 32 is pivoted at one apex of the triangle on stud 34 secured to the front wall of housing 10 and located beneath spindle 16. The uppermost edge of keeper lever 32 is provided with a rearwardly bent shoulder or flange 36 which is adapted to cooperate with latch shoulder 28 to maintain elbow-shaped lever 26 in its raised or clutch engaging position. Latch keeper member 32 is spring urged in a clockwise direction by means of spiral spring 38 which encircles stud 34 and has one of its ends attached to a bolt 40 secured in the face of housing 10 and its other end engaging the lowermost edge of keeper member 32. Elbow-shaped lever 26 and latch keeper are so proportioned that when they are in an unlatched or disengaged position, the bottom of latch shoulder 28 engages the upper surface of flange 36 on keeper member 32 and restrains it against further clockwise rotation under the influence of spring 38. It will thus be seen that as starting lever 24 is swung in a clockwise direction from the position illustrated in Fig. 6, to'the position illustrated in Fig. 5, the bottom surface of latch shoulder 28 will slide along the upper surface of shoulder or flange 36 to cam latch keeper member 32 in a counterclockwise direction against the action of spring 38 until such time as latch shoulder 28 passes beyond latch or flange 36. When shoulder 28 passes beyond shoulder 36, spring 38 immediately moves latch keeper member 32 in a clockwise direction until stop lug 42, which forms a second apex of triangular latch keeper 32 engages the under surface of latch shoulder 28. This brings the left hand edge of shoulder or flange 36 opposite the right hand edge of latch shoulder 28 to effectively prevent elbow-shaped lever 26 from returning to its clutch disengaging position. A breakage lever 44 pivoted intermediate its ends to the third apex of latch keeper member 32 is adapted to disengage shoulder or flange 36 from latch shoulder 28 upon the breakage or exhaustion of yarn being wound to permit elbow-shaped lever 26 to swing in a counterclockwise direction to the position illustrated in Fig. 6, to stop the rotation of spindle 16 and the operation of the yarn guide. Breakage lever 44 is generally Y-shaped and is pivoted adjacent the junction of its upper arms 46 and 48 to latch keeper member 32, by means of a suitable stud 50. The upper end of left hand arm 46 of breakage lever 44 is bent over to form a star wheel engaging abutment 52. The upper end of right hand arm 48 of breakage lever 44 is provided with a pin or stud 54 adapted to carry a counterbalancing weight to permit said breakage lever to be balanced so that it can be controlled by any given yarn tension. The lower end of breakage lever 44 is provided with a forwardly extending yarn engaging bar 56 adapted to engage the strand of yarn being wound on spindle 16 to maintain breakage lever 44 in the position illustrated in Fig. 5, whereby star wheel engaging abutment 52 is held away from and out of engagement with said star wheel. Upon breakage or exhaustion of the winding strand of yarn the restraint on breakage lever 44 is removed and said lever pivots from the position illustrated in Fig. 5, to move its star wheel engaging abutment 52 into engagement with star wheel 20, whereupon it is struck an impelling blow by said star wheel. The blow on abutment 52 moves breakage lever 44 downwardly to thereby pivot latch keeper member 32 in a counter-clockwise direction to release the latch shoulder 28 from shoulder or flange 36. Immediately upon the separation of shoulders 28 and 36, elbow-shaped lever 26 rotates in a counter-clockwise direction to the position illustrated in Fig. 6 thus releasing the. clutch inside of housing 10. As elbow-shaped lever 26 swings in its counter-clockwise movement, forwardly extending breakage lever engaging lug 38 on said elbow-shaped lever, contacts the edge of upper arm 46 of breakage lever 42 thereby rotating said breakage lever and star wheel engaging abutment 52 located thereon, out of the path of star wheel 20. Elbow-shaped lever 26 is provided with an extension 58 which functions to start and stop the twister spindle in a manner to be explained more fully hereinafter.

As stated above, the multiple twist spindle disclosed in Figs. 1 through 4, is generally similar to the spindle disclosed in U. S. Patent No. 2,478,926 and the manner of mounting the multiple twist spindle is generally similar to the spindle mounting and latch-out device disclosed in U. S. Patent No. 2,478,928. The multiple twist spindle 60 comprises a spindle 62 rotatably journaled in a spindle bolster 64 that is secured by any convenient means adjament one end of L-shaped arm 66. L-shaped arm 66 is pivoted adjacent its uppermost end to bed 12 by means of shaft 68 pivotally secured to said bed by means of bracket member 78. A whorl 72 and disc-like flyer '74 are fixedly secured to spindle 62. The weight of multiple twist spindle 60, augmented by spring 76, to be explained more in detail hereinafter, tends to pivot L-shaped arm 66 rearwardly to bring whorl 72 into contact with spindle driving belt 78 which extends in a generally horizontal plane along the front of the mechanism. Belt 78 is driven by any convenient source of power located adjacent one end of the machine. Contact of whorl 72 with belt 78 rotates spindle 62 and disc-like fiyer 74 in the manner old and well known in the art. A plurality of spaced idler pulleys 80 are carried by a horizontal rail 82 in back of belt 78 to guide said belt and to apply a force opposing the thrust of whorl 72. Horizontal rail 82 is secured to legs 14 by means of brackets 84.

The upper portion of sp.ndle 62 is provided with an axial bore which connects with radial bore 86 formed in fiyer 74 to provide a yarn passage in the manner common in multiple twist spindles. Flyer 74 is provided with an annular flange 75 located above the opening of bore 86. A holder 88 for carrying a package of untwisted yarn 90 is journaled on spindle 62 in the manner disclosed in said Patent No. 2,478,926. A tension device 92 is carried by yarn package 90. Multiple twist spindle 60 operates to have a strand of yarn drawn from package 90, pass through tension device 92, pass downwardly through the bore in spindle 62 and out radial bore 86 in flyer 74. As the yarn passes out flyer 74 it is drawn upwardly through guide 94, carried by bed 12 and axially aligned with spindle 62, between yarn engaging bar 56 and fixed bar 57 and onto winding spindle 16.

A spindle latch-out device of the type disclosed in the above mentioned Patent No. 2,478,928 is mounted on L- shaped arm 66. The latch-out device comprises a bent wire 96 hingedly secured to arm 66 adjacent spindle bolster 64. A weight 98 is secured to one end of wire 5 96 to pivot said wire to bring it 1 F9 engaige horizontal rail 82 to hold whorl 72 away; from belt 78, all in the manner set forth in said Patent No. 2,478,928, in the event arm is' moved a sufiicie'nt distance.

A vertical link 100 has its upper end pivotally connected to the end of extension 58 of elbow-shaped lever 26 The lower end of link ltidis p'ivotally secured to the end of forwardly extending lever 102 which is fixedly connected to shaft 68. A second lever 104' is fixedly secured to shaft 68 and extends'rear'wardly therefrom. A- second link 106 is pivotally attaehed adjacent its upper end to the end of lever 104 and is slidably journaled adjacent its lower end in bracket 108 carried by horizontal rail 82. A cam plate 110 having a cam surface 112 is secured to the lower end of link 106. A cam following roller 11 4 is carried by stud 116 on arm 66 to engage cam surface 112. Spring 76 having one of its ends connected to bent over ear 118'on earn plate 110 and its other end connected to stud 116 maintains said roller 114 and cam surface 112 in engagement. It will, therefore, be seen that counter-clockwise movement of shaft 22 to stop the winding operation willglift extension 58' and link 1110, and that link 100' will" in turn lift lever 102 to' rotate shaft 68. Rotation of shaft 68 will lower lever 104 and link 1196 to cause cam surface 112 to react against cam follower 114 and to move L-shaped arm 66 to remove whorl 72 from engagement with belt 78 Downward movement of cam plate 110 in the above described manner doesnot mov'e L-shaped arm 66 far enough to permit wire 96 to engage the edge of horizontal rail 82. Therefore, when shaft 22 is rotated in a clockwise direction the movement of extension 58, link lotl, levers 1G2 and 184, and link 1116 will lift cam plate 1'10 to permit arm 66 to swing rearwardly to again engage whorl 72 and belt 78. p v

A brake 121), preferably formedfrom" sheet metal, is pivotally mounted on L-shaped arm 66 adjacent fly'e i" 74. Brake 128 comprises two generally parallelf arm's 122 and 124, Fig. 9, connected together at one end by web portion 126. A finger 128 extends from brake arm 122' in opposition to web 126. A brake pad130, preferably formed from felt or leather, is secured to web 1261 by any convenient means. Arms 122 and 124 straddle L-sha'ped arm 66' and are pivotally journaled thereon by means of hinge pin" 132secu'red thereto and which passes through aligned openings in said brake arms. Brake 121 is resiliently urged to rotate in a clockwise direction, as viewed in Figs. 3 and 4, by means of a hair pin type spring 134 which encircles pin 132 and engages arm 66 with one of its ends and arm 124 with its other so that when it is free to rotate brake pad 130 will engage the" under side'of flange 75': v A stud 136 is positioned on link 1116 to engage brake finger 128 when said link 106 is moved to its upward position to pivot brake 12% in a counter-clockwisedirection andtoremov'e" brake pad 130' from contact with flyer flange 751 The above described apparatus opera'tes in the followi'ng'm'anner. A package" of untwisted yarn 90. is placed in holder 83 of multipletwist spindle 60. The end of the strand wound on package 9tl is threaded through" tension device 92, through the bore of spindle 62 out radial bore 86 and upwardly through guide" 94,. and secured to apackage core carried by winding spindle 1 6; Handle 24 is pivoted in a clockwise' direction' to start" the operation of the winding mechanism and to engage lafchi shoulder 28 and keeper shoulde'r or flange 36 to hol d handle 24' and shaft 22 in' their operative position. Movement of handle 24 in a clockwise direction: also moves extension 53' of, elbow-shaped lever 26 down wa'rclly to thereby move link 100' downwardly and through the intervention of levers; 1 02 andi move link 106 upwardly. Upward movement oflink; 106 raises'cam plate" 116 and permits the weight of multiple twist spindle:-

' the absence of a running strand of yarn contactin and s ring 76' to swing L-shaped arts 66 and d multiple twist spindle rearwardly until whor1 72en gf driving belt 78. Upward rnovement o'f link 1'06will also cause stud 136 to engage finger-12s and swing brake pad 130 away from flange of fiyer 74" t'o provide cient space there'b etween for the' 'stfand of yarn Y to pass through.. With the apparatus in this condition spindle 62 will rotate to swing a" loop of yafn' around the supply package 90, in the manner well known in the art, to impart two turns of twist thereinto for every re tation of said spindle. Winding spindle 16 will rotate to draw the strand of yarn upwardly and to wind it into a package. v

In the event the strand of yarn being twistedbrakjs,

S6 willpermit breakage lever 44 m pivot in a" coil f clockwise direction, as" viewed in Fig; 5, to bring its abutment 52 beneath one of the projections fd'rine'don rotating star wheel 20, whereupon said stat wheel will" drive said breakage lever and latch keeper member downwardly to disengage latch shoulder 28 from keeper shoulder 36 whereupon its spring will rotate shaft in a counter-clockwise direction to stop the operation of the winding mechanism. Counter-clockwise rotati of shaft 22 will lift extension 58 to lift link- 160 and lower link 106. As link 106' moves downwardly, earn surface 112 on cam plate will force camfollo'wer 114 outwardly and with it, L-shaped arm 66 and multiple twist spindle 66' to thereby disengage whorl 72 froth driving belt 78. Downward movementof link 106 will also move stud 136 away from brake finger 128 per: mittin'g' spring 134th: pivotb'ra'ke pad 13G upwardly into? engagement with flyer flange 75 to stop the rotation of said flyer and spindle 62' and to" thereby prevent yarn from being fed out of radial bore 86 due tocen'trifugal? force. It will be noted that the outer curved edge of brake pad is positioned close to the periphery of flyer 74 when said pad'is in engagement'w'ith; flange, Therefore, as said brake pad bri'ngs'i the liyer to a stop, the tail of yarn extending from radial bor'e' 86will as: gage said pad and will be wrapped thereby arena-d the periphery of said flyer and thus be held against ed t'anglement with belt 78.

The modified form of the resent inve' in Figs. 7 and 8 comprises a multiple w mounted on the bed 142'ofa'twistii'igmac eby'nieans" of a spindle swing 144 of the' type disclosedin' U. S. Patent No. 2,648,948 issued August l8,- 1953 to D. G11 Soussloff et al. Spindle swing 144 includes a bracket portion 146 secured to' bed 142 and having pivotally mounted thereon spindle carrying arm 148; A spring} not shown,'is located in bracket'p'ortion 146andlis con;

nect'ed' to arm 148 to resiliently urge sai'd arni rearwardly as viewed in Fig. 7, and to the" left as viewed in Figil 8. Spindle 141) is resiliently se'cured'in arm 148 by means of a vibration isolating mounting member 150' of the; type disclosed in application for U. S. Letters Patent" Serial No. 222,836 for Spindle Mounting filed' April 25,

1951, by D. G. Soussloif et al.

ages by said whorl u'pon rearward pivotal movement 75' Multiple twist spindle is sirnilarto the multiple twist spindle disclosed in application for U. S. Letters. Patent Serial No. 383,263 for Twister Spindle, filed September 30, 1953 by J. V. Keith but, it will be understood that any of the prior are belt driven multiple twist; spindles adapted for vertical operation, can be employed; in its stead. Multiple twist spindle l-flt) is providedwith. a spindle'blade, not shown herein, which has whorl and fly'er 154 fixed thereon. The spindle blade is'rot'ata} bly journaled in spindle step'156 which in turn is se{ cured invibration'isolating mounting 15.0! A belt 158, conventional in uptwisting machines alder-weary a source of power lecated adjacent the end of the mac ispositionedadjacent-whorl 'l'5 2fand is adapted e ofami 148' to thereby rotate saidwltotU the spihdle 2, blade andflyer 154. Forward pivot movement of arm 148 disengages whorl 152 from belt 158 and brings said whorl into engagement with fixed brake 160, carried by braket 146, to stop the rotation of the spindle, whorl and fiyer. Flyer 154 is a disc-like member secured to the spindle blade adjacent whorl 152 and is provided with a radial passage 162 which connects with an axial passage in the upper end of the spindle blade in the manner old and well known in the art and which is fully described in said above mentioned application Serial No. 383,263, to provide a passageway for the yarn being twisted by the spindle. Support means 164 are carried by the spindle blade for holding a supply of yarn to be twisted. A permanent magnet 166 is carried by an upstanding arm 168 and cooperates with a second magnet, not shown, carried by support means 164 to prevent rotation of said support means with the spindle blade. The lower end of arm 168 is secured to bracket member 179 which in turn is secured to spindle step 156 by having said step pass through a hole formed therein and being clamped between the lower end of vibration isolating mounting member 159 and the nut 172 which clamps said spindle step in the vibration isolating mounting member. A balloon restraining ring 174 is also supported by upstanding arm 168 and encircles yarn supply support means 164.

Means are provided for winding the strand of yarn Y after it has been twisted by multiple twist spindle 140 and for disengaging the winding mechanism and moving spindle 140 to its inoperative position in the event the strand of yarn being twisted should break. A driving drum 176 is rotated by shaft 178, in the manner common to uptwisters, it being understood that shaft 178 is suitably journaled in the end frames, not shown, of the twisting machine and is rotated by the main driving mechanism of the machine in a manner well known to those skilled in the art. A bobbin hanger 180, preferably of the type disclosed in the pending application for U. S. Letters Patent Serial No. 320,065, filed November 12, 1952, by D. G. Soussloif et al., for Stop-Motions for Winding and Like Machine, is secured to a longitudinally extending bar 182, carried by the twister end frames, in such a position that a bobbin or spool 184 carried by said bobbin hanger can contact drum 176 with its barrel or the yarn wound thereon, all in a manner old and well known to those skilled in the art. Bobbin hanger 130 is also provided with a stop motion device, also specifically described in the above mentioned application Serial No. 320,065, to lift said bobbin hanger to raise the winding package carried thereby from driving drum 176 when the strand of yarn is broken or exhausted. The stop motion mechanism includes an oscillating shaft 186 carrying a finger 188 which is rocked up and down by said shaft 186 adjacent a hook 190. Hook 190 is carried by bobbin hanger 180 in such fashion that when it engages finger 188 said finger pulls it downwardly to pivot said bobbin hanger upwardly. Hook 1% is held retracted from the path of oscillating finger 188 by means of a counterbalanced breakage lever 192, the end of which is engaged and held in a lowered position by the twisted running strand of yarn Y as it passes from spindle 140 over horizontal guide bar 194 and on to bobbin 184. It will be understood that a conventional reciprocating yarn guide is interposed between guide bar 194 and bobbin or spool 184 to guide the running strand of yarn along said bobbin or spool. Said reciprocating yarn guide is omitted from the drawing inasmuch as it forms no part of the present invention and is not necessary to a complete understanding thereof. In the event strand of yarn Y breaks, breakage lever 192 is permitted to rise and in so rising causes hook 190 to move into the path of oscillating finger 188'whereupon said finger pulls said hook downwardly to lift bobbin hanger 180 and remove bobbin 184 from contact with driving roll 176. The specific details of the construction and operation of the bobbin hanger and stop motion are explained in detail in the above mentioned patent application Serial No. 320,065.

A link 196 is pivotally connected, at its upper end, to one arm of bobbin hanger 180 by means of hinge member 193 secured to said arm. The lower end of link 196 is slidably received in aligned holes formed in U-shaped fitting 200. Fitting 200 is pivotally connected to arm 202 of bell-crank lever 204 which in turn is pivotally mounted on horizontal shaft 206. Shaft 206 may be mounted on brackets secured to bed 142 or can be secured to the end frames of the twister. The second arm 208 of bell-crank lever 204 is attached at its lower-most end to one end of horizontal rod 219. Rod 210 is supported adjacent its free end for sliding movement by means of a slotted hanger 212 secured to the edge of bed 142 to position said free end of said rod 210 closely adjacent spindle carrying arm 148. The lower end of link 1% has a stop member 214 threadly mounted thereon and spaced from U-shaped fitting 200 a sufficient distance so that link 196 canslide through fitting 200 as said link moves upwardly with bobbin hanger 180 in response to the growthof the package of yarn being wound on bobbin 184. When the stop motion functions, it lifts bobbin hanger 180 higher than it is lifted by the growth of the winding package, therefore, stop member 214 is positioned close enough to U-shaped fitting 200 so that the additional movement, imparted by said stop motion, will cause it to engage said fitting 200 and rotate bell-crank lever 204 in a counter-clockwise direction, as viewed in Fig. 8. Such movement of the bell-crank lever causes its arm 203 to slide horizontal rod 219 to the right bringing its free end into engagement with spindle carrying arm 148 to swing said arm and spindle 141) outwardly to thereby disengage spindle whorl 152 from driving belt 158 and press it against brake 160. A torsion spring can be provided around shaft 206 to tend to rotate bell-crank lever 204 in a clockwise direction to normally retain horizontal rod 210 in its retracted position, or the spring present in spindle carrying bracket 146, which functions to press whorl 152 against belt 158, can be made strong enough to perform that function.

The modification of Figs. 7 and 8 functions in the following manner. Spindle is threaded in the customary manner and the strand of yarn Y is drawn upwardly through stationary yarn guide 216 over guide bar 194 and breakage lever 122 and attached to bobbin or spool 184. Bobbin hanger is then lowered to bring said bobbin or spool into driving engagement with driving drum 176 to rotate said bobbin to wind strand of yarn Y thereon. Lowering bobbin hanger 186 also moves link 196 downwardly thus moving stop member 214 away from U-shaped fitting 200 to permit bell-crank lever 204 to rotate in a clockwise direction thereby moving horizontal rod 210 inwardly and permitting spindle carrying I arm 148 and spindle 140 to pivot inwardly to engage spindle whorl 152 against belt 158.

In the event strand Y breaks, or the supply thereof is exhausted, breakage lever 192 will rise and will swing hook under oscillating finger 188 whereupon said finger will pull said hook downwardly to lift bobbin hanger 180 to remove the winding package from contact with driving drum 176. Upward movement of bobbin hanger 180 will lift link 196 to bring stop memher 214 into engagement with U-shaped fitting 200 to rotate bell-crank lever 204 in a counter-clockwise direction. Counter-clockwise rotation of bell-crank lever 204 causes the arm 208 thereof to move horizontal rod 210 outwardly to contact its free end with spindle carrying arm 148 and to swing said arm and spindle 140 outwardly to disengage whorl152 from belt 158 and to press said whorl against brake 160 to stop the rotation of the spindle.

' 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 con- 9 iaines' in the above description or shown the accent pan'ying drawings shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

l. A machine for twisting and windings. strand of yarn comprising a multiple twist spindle having a rotatable spindle provided with an axial and radial passage for a strand of yarn, a whorl fixed to said spindle, means engageable by said whorl for rotating said whorl and spindle, yarn supply support means carried by said spindle, a pivotally mounted support for saidspindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewith, said spindle support being urgedinthe direction to engage said whorl and rotating means, winding means for winding yarn twisted by said spindle, said winding means comprising a rotatable Winding spindle and a yarn guide for reciprocating a winding strand of yarn longitudinally of said winding spindle, a starting lever movable manually in one direction to start said winding spindle and yarn guide, means urging said lever in the opposite direction to stop said winding spindle and yarn guide, latch means to hold said lever in winding position, stop motion mechanism operable in the absence of a winding strand of yarn to release said latch means to permit said lever to move to its stop position, a linkage connected to said lever and movable therewith, and cam means carried by said linkage and engageable with said spindle support as said lever moves to its stop position to pivot said spindle support to thereby disengage said whorl and rotating means.

2. A machine for twisting and winding a strand of yarn comprising a multiple twist spindle having a rotatable spindle provided with an axial and radial passage for a strand of yarn, a whorl fixed to said spindle, means engageable by said whorl for rotating said whorl and spindle, yarn supply support means carried by said spindle, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewith, said spindle support being urged in the direction to engage said whorl and rotating means, winding means for winding yarn twisted by said spindle, said winding means comprising a rotatable winding spindle and a yarn guide for reciprocating a winding strand of yarn longitudinally of said winding spindle, a starting lever movable manually in one direction to start said winding spindle and yarn guide, means urging said lever in the opposite direction to stop said winding spindle and yarn guide, latch means to hold said lever in winding position, stop motion mechanism operable in the absence of a winding strand of yarn to release said latch means to permit said lever to move to its stop position, a link operably associated with said lever and movable therewith, a brake, means urging said brake in a direction to engage said spindle to stop its rotation, means carried by said link and operably associated with said brake for holding said brake out of engagement with said spindle when said lever is in winding position, and cam means carried by said link and engageable with said spindle support as said lever moves to its stop position to pivot said spindle support to thereby disengage said whorl and rotating means and to permit said brake to stop the rotation of said spindle.

3. A machine for twisting and winding a strand of yarn comprising a multiple twist spindle having a rotatable spindle, a disc-like flyer and a whorl fixed to said spindle, means engageable by said whorl for rotat ing said whorl, spindle and fiyer, said spindle having an axial passage therein joining a radial passage in said fiyer to provide a passage for a strand of yarn to be twisted, yarn supply support means carried by said spindle, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewas, said spindle su port being ur es is the site a engag'ei'said whorl and rotating means, winding means for windingyarn twisted by said spindle, said' winding means comprising a rotatable winding spindle and a yarn guide for reciprocating a winding strand of yarn longitudinally of said winding spindle, a starting lever movable man uzflly in one direction to start said winding spindle and yarn guide", means urging said lever in the opposite direction to stop said winding spindle and yarn guide, latch means to hold said lever in winding position, stop mo tion mechanism operable in the absence of a winding strand of yarn to release said latch means to permit said lever to move to its stop position, a link operably associated with saidlever and movable therewith, a brake, means urging said brake in a direction to engage said fiyer to stop the rotation of said spindl'e', means carried by said link and operatively associated with said brake for holding said brake out of engagement with said fiyer when said lever is in winding position, and cam means carried by said link and engageable with said spindle support as said lever moves to its stop position to pivot said spindle support to thereby disengage said whorl and rotating means and to permit said brake to stop the rotation of said spindle.

4. A machine for twisting and winding a strand of yarn comprising a multiple twist spindle having a rotatable spindle, a disc-like flyer and a whorl fixed to said spindle, means engageable by said whorl for rotating said whorl, spindle and flyer, said spindle having an axial passage therein joining a radial passage in said flyer to provide a passage for a strand of yarn to be twisted, yarn supply support means carried by said spindle, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewith, said spindle support being urged in the direction to engage said whorl and rotating means, winding means for winding yarn twisted by said spindle, said winding means comprising a rotatable winding spindle and a yarn guide for reciprocating a winding strand of yarn longitudinally of said winding spindle, a starting lever movable manually in one direction to start said winding spindle and yarn guide, means urging said lever in the opposite direction to stop said winding spindle and yarn guide, latch means to hold said lever in winding position, stop motion mechanism operable in the absence of a winding strand of yarn to release said latch means to permit said lever to move to its stop position, a link operably associated with said lever and movable therewith, a brake, means urging said brake in a direction to engage said fiyer adjacent said radial passage to stop the rotation of said spindle to prevent yarn from feeding out said radial passage and to wrap the end of yarn extending from said passage around said fiyer, means carried by said link and operatively associated with said brake for holding said brake out of engagement with said fiyer when said lever is in winding position, and cam means carried by said link and engageable with said spindle support as said lever moves to its stop position to pivot said spindle support to thereby disengage said whorl and rotating means and to permit said brake to stop the rotation of said spindle.

5. A machine for twisting and winding a strand of yarn comprising a multiple twist spindle having a rotatable spindle, a disc-like fiyer and a whorl fixed to said spindle, means engageable by said whorl for rotating said whorl, spindle and flyer, said spindle having an axial passage therein joining a radial passage in said fiyer to provide a passage for a strand of yarn to be twisted, yarn supply support means carried by said spindle, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewith, sa i-d spindle support being urged in the direction to engage said whorl and rotating means, winding means for winding yarn twisted by said spindle, said winding means comprising a rotatable winding spindle and a yarn guide for reciprocating a winding strand of yarn longitudinally of said winding spindle,

- a starting lever movable manually in one direction to start said winding spindle and yarn guide, means urging said lever in the opposite direction to stop said Winding spindle and yarn guide, latch means to hold said lever in windingnpsition, stop motion mechanism operable in the absence or a Winding strand of yarn to release said latch means to permit said lever to move to its stop position, a link operably associated with said lever and movable therewith, a brake carried by said spindle support, means urging said brake in a direction to engage said flyer adjacent said radial passage to stop the rotation of said spindle to prevent yarn from feeding out said radial passage ,and to wrap the end of yarn extending from said passage around said fiyer, means carried by said link and operatively associated with said brake for holding said brake out of engagement with said fiyer when said lever is in winding position, and cam means carried by said link and engageable with said spindle support as said lever moves to its stop position to pivot said spindle sup port to thereby disengage said whorl and rotating means and to permit said brake to stop the rotation of said spindle.

References Cited in the tile of this patent UNITED STATES PATENTS 2,478,928 Carter et a1 Aug. 16, 1949 2,482,654 Cochran et a1 Sept. 20, 1949 2,557,783 Cochran June 19, 1951 2,574,957 Bochmann Nov. 13, 1951' 2,584,096 Thomas Jan. 29, 1952. 2,599,256 Hartley et a1. June 3, 1952

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