US1919928A - Coil winding machine - Google Patents

Description

July 25, 1933.

W. N. BRIGGS COIL WINDING MACHINE Filed Jan. 31, 1931 2 Sheets-Sheet l lnven-tof: WiHiam N, Briggs,

by Mm I His Att-or neg.

July 25, 1933. w. N. BRIGGS COIL WINDING MACHINE Filed Jan. 1, 1931 2 Sheets-Sheet 2 64 F124 e4 &

a a A Figs W v E A Invent-o f: William N. BTI

Patented July 25, 1933 WILLIAM N. BRIGGS, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A COR?ORATION OF NEW YORK c011. WINDING MACHINE Application filed January 31, 1931 Serial N'oQ 512,663.

My invention relates to coil winding machines, more particularly to coil winding machines wherein layers of insulating material are deposited between the layers of wire or conductors as they are being wound to form a coil, and hastfor its object the provision of an improved coil winding machine of this character.

Although it'is'not limited thereto, my invention is particularly useful in; connection with machines for Winding transformer coils I and the like.-

When an electrlcal conductor is wound into a 0011 for use in such apparatus as transfor1ners,for example, it is necessary to insulate the layers ofthe vconductors from a each other with great care; it is particularly important'that ample insulation be provided between the end portions of the layers since w it is in these portions that the highest potential in the winding occurs by reason ofthe fact that the electrical potential from layer to layer is proportional to the number of turns in each layer and also to the potential existing between each turn. a

In order to insulatecthe layers of the coil,

it is connnonto apply theinsulating mate- .7

rial to the winding spoolrconcurrently with the electricalwconductor so-that a .layer of the insulating material is depositedtbetween each pair of adjacent conductor layers. In one arrangement'forthus a plying insula v tion tothe coil, cotton threa iorsom'e simi-,,

lar insulating material is used to insulate I the layers and iswound' crosswise, of the coil several times whileone turn ofnthe conduca tor is being wound on. In this manner the and to securesthelelectrical windings; In oneof its aspects my nvent on contemplates the provision-of an improved coil winding machine whereby the insulating material is applied in layers throughout the cotton thread forms insulating surfaces I up- 7' on'which the; successive turns of the layer.

being wound .ontand the turnsof the ,next' succeeding layer are supported. Moreover, a'layer ofinsulatingthrcad isdeposit ed between thesucccssive turns formingeaclr layer'.. It will be understood that the cottonthr'ead. thus applied serves 1, both to; insulate rality of layers.

tain structural details, and Figs. 4, 5,

fulllength of the coil and in relatively large amounts between the end turns of successive layers wherethe highest potential between V p the layers occurs. a

In carrying out my invention in one form thereof, I provide suitable means for guiding the insulating thread tov the winding spool so that the length of thread passed to the spool is caused to move through an intermittent closed path of motion arranged lengthwise of the spool whereby the thread 'iswound crosswise of the spool in a plu- The pauses in the motion of the length .passed to the spool occur at the end portionsof the spool so that relatively large amounts of the thread are deposited at .theseportions.

Fora more complete understanding of my invention, reference should be had to the accompanying drawings in which Fig. 1 is an elevation of a portion of a winding machin'e 'einbodyinginy invention; Fig. 2 is a plan vicwof the winding niachlne of Fig. 1,

and. illustrating certain auxiliary elements used in connection. with the winding machine; Fig, 3 is a fragmentary view mainly inseption of a portion of the winding chine of Figs; 1 and 2 and illustrating andQ8 are diagrammatic views illustrating the: operation of. certain elements of the windingmachine ofFigs. 1, 2 and/3.

Referring to the drawings, in one 'fOl'lllOf my invention the spools 10 onwhich. tlie c'oils are to be wound arecarrmd on'a su table arbor-.11. For .thepilrposo of illustration I have shown a, winding arbor arranged to accommodatetwo spools, and further have shown each spo ol provided, with. two co'mpart nents"10a,and 107 defined by sultable headsprrfiangesYl Q; it. is to be understood,

h )\vevcr-,'that my, invention isinot lim-itcd t fthe winding-"of a plural tyflf P Q LI jQ 5 the jcharacteiqsl o\vn,ihut v is e qually v as applicable to 1 the .win ding of a s ngle. spool prow .:videdr' with either. one a plurality of con'rv pertinent-s minis to the winding of alplurale ity of spools, as shown, each having a plu- 'rality of compartments" Thcarbor 11 is supported onone end by means of an adjustable spindle 12'and is arranged to be mechanically connected at its opposite end with an operating shaft 13 by means of a suitable clutch 14 so that the spools can be rotated in; order to wind electrical conductors 15 thereon in their respective compartments. As shown he spindle 12- is mounted in a suitable standard 16,'while the operating shaft 13 is supported in a suitable bearing member 17. The arbor 11 is provided with removable head portions 11a so that the coils maybe removed from the Winding machine after they have been formed.

It will be understoodthat the electrical conductors 15 will be guided to the spools by means of suitabledistributers or guiding means (not shown) so as to be wound thereon in a plurality of layers. One form of such a winding machine is described and means of layers of insulating material formed by winding onto the spools simultaneously with the conductors. cotton threads or some similar insulating material. Each cotton thread 20 preferably will be wound crosswise of its spool compartment a plurality of times whileone turn of y 24 the threads 20 are directed to suitable distributing and guiding means whereby the" .threads are applied to'the spool portions shown) of the winding machine.

- the conductor is being wound on and moreover, preferably will be deposited in relatively large amounts at the end portions of the layers where the highest potential in the winding occurs. I

The insulating threads 20 are supplied from suitable reels or bobbins 21 (Fig. 2)

which as shown are supported for rotary motion ons'pindles 22. These spindles in turn are mounted on a suitable supporting frame 23. Thisframemay be arranged in any suitable location. but preferably will be attached to the .supporting framework (not The thread is. passed from the bobbins 21 through suitable tensioning jaws 24.also

-mountcd on the frame '23 and which' may have any suitable well known preferred construction. The' tensioning jaws 24 are mounted upon suitable frames 25 which are adjustably secured by means of suitable clamping devices 26 to upright portions 27 formed on and preferably integrally with the frame 23. From these tensioning jaws being wound in a manner to provide the above-mentioned insulating layers.

The insulating thread guiding and distributing means comprises suitable rotatably mounted guiding arms 30, shuttles 31 and shuttle guide members 32.

The guiding arms 30 are mounted for rotation upon axcs'arranged substantially perpendicular to the longitudinal axes of the winding spools 10 and substantially midway of the lengths of the respective winding compartments in which the conductors 15 and insulating threads 20 are being wound, as for instance the compartments 10b of Figs. 1 and 2; Suitable spindles 33 mounted for rotary motion in bushings 34 are provided for rotatably supporting the arms 30. The bushings 34 as shown are'recei-ved in suitable apertures 35 provided for them in a supporting framework 36 and are detachabl v secured to this framework by some suitable means, such for example as screw fastening means 37. The spindles 33 are secured against lateral displacement in one direction by means of flanges or heads 38 preferably formed integrally with the spindles intermediate their ends so as to bear against the outer ends of the bush ngs 34, and are secured against lateral displacement in the opposite direction by means of collars 40 secured to their inner ends so as to bear against the inner ends of the bushings 34. These collars 40 may besecured to their respective spindles in any suitable manner, but preferably will be secured thereto bymeans of set screws 41.

The collars .40 perform the. further func-' 'tion of supporting the guiding arms 30.

As shown each collar is provided with a suit- .able hole or aperture 42 for receiving one end portion 30a (Fig. 3) of its associated arm 30. The arms were. rigidly secured to thefcollars by any suitable means, as by brazing or soldering.

The framework 36 comprlses a. transverse plate 43 for supporting the bushings 34, a

pair "of upright column plateinemlimrs 44 to'the upperends of which the transverse plate 43 is mechanically secured and a rodlike shaft member 45 secured to the columns intermediate their ends. This rodlikc member 45' serves to pivotally mountthe frame .on two upright bearing arms 46 which are secured to a base plate 47 provided' for the framework. As shown the bearing arms 46 are secured to the base plate 47 by means of suitable stud bolts 48passed through elongated apertures'50' (Fig; 2) provided forthcm 1n the base plate and arranged with thelr longitudinal. axes perpendicular to the axes of the spools so that the framework may be adjusted toward and away from the spools. It will be understood that the heads 48a provided on these stud bolts are sufficiently large to prevent the bolts from pulling through their. apertures, and that the framework may be locked in any position,

' greater than one-half of the leri'g within the length f the apertures bytighteningthe stud bolts and may be shifted to a different position merely by unscrewing:

the bolts, moving the frame to the desired position and then tightening the/bolts. It

will alsobe understood that the upright column plates will be secured to the opposite endsof the shaft member 45 by any suitable means, such for example 'as by suitable pins 10.51.

It will be observed that by reason of the foregoing construction the framework 36 may be rotated as a unitary structure'about the shaft 45. The framework, however, nor- 7 l5 mally -is located ina vertical position and is secured in this position by spring-pressed plunger members 52 onthe lower ends -ofthe columns 44 and normally received in recesses 53 provided for them in the adjacent faces of the associated bearing menibers46.

It-is-to be understood that-while this locking arrangement will effectively lock the framework in its upright position during the normal operation of the machine, it is sufiiciently' yielding to allow the frame to be moved away from its upright position and to a-p-osition remote therefrom. As shown, the base plate 47 is supported at its inner edge on a portion Mot the .frame of the 1 winding machine, and at its outer edge is supported by means of suitable posts 54a slidably mounted on a rodhke member 546 arranged longitudinally of the machine and supported, by any suitable means (not shown). The body portions '30 b respect'to the secured end, portions a- 0 end portions 300' so that the end portions and 300 are-disposed at an angle-of 90 vg th respect to each other. On the vfree ends 390;

l .of the arms are arranged eyelets 55, 55 0, of which are directed inwardly toward the axes of rotation of the arms; an

shown, the arms 30 are so proport g the eyelets move on aradius subs spool compartments being wound The lengths of threads passedv ,tp ing spool from the tension pg ims will be observed, are directedtpjlie, ey esy ia, through the spindles 33 so that the to move in closeducircular pa, s, the centers of these the spindles 33.

As shown, the shpttlfii 1f porting frames 32 pr qv' amass-s terposed t -t m 1 e eu aa p s 9: e-shuttlesi ili-stamens their gmde aeeieseaee seepage therein. In ot er words, -t e s ut les (Fig. 3) 1 of thegf V guiding arms 30 are an gularly disposed with ef' a as ettlare ss ssmen .aiid after I guides are so proportioned relatively to each justedposltion by tightening up the screws 8. 1

other that the shuttles can beamoved frames both longitudinallyi' and cr tically for limited distances, It will be observed (F i" 31 comprise suitable members 56 and M disposed one above the other in a verticali dr rection so as to receivethe' slnittle's'between them an'd' that each isprovided with guideways 58' for receiving the adjacentedge portions of the shuttle'sffor"reciprocatolymotion therein and s'o that' the-shuttles Ire maintained in a silbstantia'lly verticalpo'si tion in the guides; For convenience of 'conthat the guides 32 provide for the shuttles struction theshuttle guides 56 and 57 for the two shuttles provided for the Lmachine are shown as unitary members=-'('Fig.' "In j other words, the niembers-fifiand' S'Z may be and as shownziare formedfronn a 'suitable solid i'nembei'r which has 'itsiend portions slit or cut away to form pron'glike orwforked ends, theseiendsdefiuing the upper and lower; guide members 56 and i r Cthewcentra'l? por tion of thismember-f is left solid and :isssupported on z twoastanda 'ds 60; (Figs. 1 =an'd 2) which haveahonizontally extendingwportions (30a and uprigh'ti portions 60b; tmWhioh "latter portidnsl; thencentral1'; :portiort rob-the c 'guide n'iember is; secured}. 2 The vihorizontaliportions 6Om-mhiclr1 are-rimmed at'isubstantizdlyn90 with the uprightiuportionsi60b arefsec uredgto a suitable s1uppo1-tingplate fil iw-hich-iri turn is asecuredi toithe a column members i 4fl gp 1 Thisamemhera 61 ecured oetheieohifnn sterling meaf'ns atwh clh seriv i, c .ll i i .mhe s amen t sheaths?salixhaeetie 66 ee it esuigrtnr aisr ee aedib tire x1e; imcmbersiso assettletmeiaistepifio (I :members tops @theeupr-ight.

L nshuttls; eflihe; membrane: 64 safest-anther 133 r opnoyiide'dii avi thiiblamping ejxwrimerhbfrsqfi? The lengths of threads 20 passed from the I .eyelets 55 to 'the respective spools are guided through the shuttle frames between the shuttle members and the frames. It Wlll be observed that the shuttle frames 56 and 57 and the stop members 64 define closed aths of motion about the shuttle members or the lengths of thread passed therethrough. It will also be observed that in view of the fact that the shuttle stops generally will be adj usted to positions substantially at the ends of the spool compartments which are being wound and inview of the fact that the eyelets 55 are moved on radii considerably greater than one-half of the lengths of the compartments being wound andalso considerably greater than one-half of the distance between-the guides 56 and 57- that as 20 the guiding arms are being rotated the threads will be wound crosswise of the spool but will be delayed at the end portions thereof so that relatively great amounts will be deposited at these portions.

For this purpose each shuttle is'provided with inversely disposed hooklike arms on its opposite'ends, the direction in which these arms are directed depending upon the direction of rotation of the guiding arms 30. It will be observed (Figs. 4, 5, 6, 7 and 8 i that if the arms 30 be moved in a; clockwise direction, as viewed in these figures, the lefthand hook member 70 will be curved in a downward direction while the right-hand member will be directed in an upward direction. If the arms 30am to be rotated in the opposite direction, that is, in a counterclockwise direction, the arrangement of these.

arm swill be reversed.

These arms 70 are so arranged that they will close or shut the path of motion pro: vided for the thread about the shuttle when the-shuttle is moved to either of its limiting positions in its longitudinal direction of motion. In other words, if the shuttle be moved to its left-hand limiting position, as

shown in Fig. 4, the hook member on the left-hand end of the shuttle will close the path of motion about this end of the shuttle,

' whereas if the shuttle be moved to its righthand. limiting position, as shown in Fig. 7, the' right-hand hook member 70 will close the path of motion about the right-hand end i shaft 83.

ranged so that it will be movedto its re- .spective limits of travel by the tension in with a second pair of arms 70m arranged" on its opposite ends and opposite the arms 70; the functions of these arms 700. will .be

pointed out in greater detail hereinafter..

Preferably the end portions of'the shuttles will be tapered inwardly toward the longitudinal axis of the shuttle as shown so as to facilitate the movement of the thread lengths about the-shuttle.

The guiding arms 30 are rotatedpreferably by motion received from the main drive shaft 13 provided for the winding machine.

As shown one of the arms 30, as for example the right-hand arm, as viewed in Figs. 1 and 2, is provided with a sheave 71 which is secured to the driving spindle 33 provided for the arm so that it can impart motion thereto, and which is provided with a pair of grooves 72 and 73. About the first of these grooves a suitable belt 74 is passed, this belt serving to transmit motion to the sheave and consequently to the arm 30 from the main drive shaft 13. As shown, a suitable cone sheave 75 is secured to the main drive shaft -13 for transmitting motion to the pulley by means of the belt 74. As shown. .(Figs. 1 and 2) the belt 74 is directed from this cone sheave 7 5,over an idler sheave 76, thence over a second idler sheave 77 of a suitable tensioning device 78, thence around a second sheave 80- of this device,

and thence is passed around athird sheave 81 ofthe tensioning device from whence it isturned about the groove 72 provided in the guiding arm operating sheave 71 from which sheave it is directed to an idler sheave. 82 arranged below the sheave 76 and from there is directed back to the operating cone sheave 75. The idler sheaves 76 and 82,, it

'will be observed,.are disposed one above the other so as to rotate freely on, a'vertical' shaft 83 arranged in a supporting member 7 84. Asshown, this supporting member 84 is secured at its lower end to the base plate 47 by any suitable means, as by rive'ts'or bolts 85, and at its upper end is provided with a pair of horizontally projecting arms 86 which are arranged to support the sheave The idler sheaves 77 and 8 1 of the belt tensioning device are mounted for rotation on suitable spindles 87 and 88 respectively which in turn are arranged'on a suitable supporting plate 90 which is secured to the upper supporting plate 43 provided-for the framework 36. As shown, this plate 90'is secured to this plate by suitable bolts 91.

The sheave 80 of the belt tensioning device is provided with a suitable U-shaped support- 2O to transuiit motion to the left ;az'i1i'3(), of Figsg-l and 1 ing member 92 (Fig. 2) between thearms ofy; which the sheave 80 is rotatably mounted.

This member 92 'is sup bracket 93 by means-" o tion 94' As shown, the

ableja iorture9lj provid d end, of the) supporting projecting end of thi suitable nut between spring'198; It willfbe -rel view I of the foregoin'g arra the tension of t which} iiiajbefl) c The groove ,73 oflth'e h m v e ds lefthand gu ding T arm s pr ovidedifiw th n a pe ding .P .Wh C

' is I merely 1; just ne nt the base plate; gel? secured :"to the i 1 portion :54 :(if' the-{11min frame of the? Win ding machine by means {Of "suitablefstud bolts' l03 passerl thl ough elongated slots 1051 arranged iii the: bll SB PlHQt Q 47 longitudinally; of the: windingsi-machine. In the goperation ot Ethel machine, ,i t wills suitable driving sheave securedf to 1 r ng i in l-B z :A liable be t @101: servesto' 'transmit ni'otio between;the pul a 3' i 7 l a. 1 *T s lit will e; Observed hat "t eid es i i t, 13 w hw seditea v v v also bei nderstood,that those portions of the;

rotate} the winding l o alsolgserves rotatcf] the guid ng arms which the (lllVlnghlllisB of tlie 'c'oneisheave words sthe, cone sheave spools lO andrthe guidin g arms330:

flhe arrangement; 5 gthe driving belt; 74: and-of the tensioning glevice, issuchxthat if" the fhinework 36; carrying gthe I- thread guilds} a i 3 and h ll 1 i3 sb moved about its shaft 45-awayfrom gtlmJspoQls-lto a c -.erta in extent, thegtension inthe beltqwillfl be i'etl lcgl to such a degreeithat thefarms Willi-lease to rotateq even thoughfthe operatw lhus,g if for: any 1 H V op theqinsulationi feed luring the operation the machille it:

ceus omo 11h "i v e "uylt fi iscjspindls33 and thefeye'lets 5 5 are'represented ing ar lnsaarranged thereonyandi-the shuttles :2 and H101 1- associated mechanism;isiarranged I to be moved ilongitudinally; with..respiect to to; thespeols 1Q. i Eor ithepurpose of this ad be umlerstoml; that :the base-equate, ,will; 3 be;a justed longitudinally of-the machine;

, emit eased cured'thereto and ssed .;thi'ough" a V p a p H com'modate the shuttles'togthe diameter of j thespools; [and further'that'theshuttle stops Mf will be l adjusted a distance apart sub v 1 and the-I vbracket 96 is i'nterposed fal ,,cO1npr -Si fij y e e swa l f l entertains spri'ngservesto tensier the tlr'vingjbelt 71s, y "t i l d listing the nut l 97 on t the rod 95;; 'lhel bracketflil, is rigidlyseemedj te he @plate 5 '47 by'means of Sllltitblti lbolts '99ll a is iitilizedf g andthedriveshaft and 'a't a speed -(lepejnd-- ent'upon which'of the grooves of the cone.

f 10 ;thef guiding arms 30Jwill be rotated.by" s5 0 t i se edi-i a. re rotated de u llzed- 1.7 other t v P nt-Messie adjustment of the speedsratio gbetweenthe;

'lll ibyse }plate 47, togetherwith 1" so the spindles 33, or in other words;

partments ihjwhich coils are to be (wound that the frame '36 will be adjusted toward or J may from; the; spools used f so as 1 to "acthe axes of rotation of the guiding arms i 30 willbebroughtto positionssubstantially m dw y f he: g h f; h P 0 .c 7o

stantially equalto'tlieilengtlis of the spool compartments and alsolsotha't the paths be-i tween'thef guides for the lengths of f'the as "to impart rotary motion to the spools substantiallycoeittensive with the winding 7 means of the belt connections between them sheave v75 is' being used, Itfwill be under will bejmaintained under a slight tens'icnf by 'fmeansfof the friction jm'vs 24; "It Will'-.:

lengths of the threads passed from the jaws 24 to the spools which-aretdirected throughf "th'e eyes r5581. will be moved, in :continuous circular paths or motion by thet'rot'al'y mo 1 ti'on of the arms; "Thisinotion imparted to ii the'threadstends' to cause those; thread por-= tions which: are directed through'the shuttles to move in"continuous' closed paths ofmotion faboutfthe; shuttle .Inembe'r's, f these paths be ingfj defined by thefupper and lower shuttle guides 56 and'j57 and by the stop members.

i 64.} A'shasfben pointed out, howevler,[the

shuttlesopei'atel toi'give the thread portion 4 passed I through'f fthe, guides an intermittent motion5'the pausesin this gm'otion occurring at the end portions of; the spool,

The operation ofthe:shuttlesinay lbe more clearly understood by referenceto igs. 4-8, inclusive; Inthese figures the arms 30, the

is designated-by -the small circle A. As has been pointed ioutfthe eye 55a is moved thrgmglra zcontinuous curved path of motion.

,Letlit liie ;assilniedthat the arm 30 and the eyelet aafare inthe positions shown in solid lines i tEig A and that the arm is bemg @rotated"in,tl1ej direction of the arrow shown will thisvfigurefl. e.;;in a clockwise direction,

as;v1ewed "in the figure.

In this position of the arm 30 the shuttle thread portion will 5be;,,in theJpositionAshown in Fig. 4 having been moved from its dotted line position A fact that. the shuttle will have been moved to this position bythe motion of the arm from its dotted to its solidline position.

As the arm 30 is rotated in aclockwise direction the position of the'thread portion passed through the shuttle frame will be moved beneath the shuttle as shown in- Fig. and will continue to pass beneath the shuttle until the arm has been moved to its dottionwillbe moved upwardly until-finally when the arm 30 has reached its solid line position shown in Fig. 6 the thread will be engaged by the left-hand shuttle arm 70. The thread will be held in this position during thesucceeding complete revolution of the arm so that during this revolution of the arm the thread will be wound on the left end portion of the winding surface of the spool. It will be observed that as the arm 30 moves from its solid line position of Fig.

6 to its solid line position of Fig. 7 that the thread portion passed through the shuttle will be held in its left-hand position by the arm but that during this motion of the arm-the shuttle will be moved toward its right-hand limiting position by the motion of the arm and the tension in the thread, it

being understood that the tension will be sufiicient to move the shuttle to its right hand position. As the arm moves from its solid line position of Fig. 7 to its dotted line.

position of Fig. 7 the thread portion passed through the shuttle will be moved down wardly to its dotted line position A, in which position it will engage the second arm 70a provided on the left-hand end of the shuttle. This second arm is provided'on the shuttle to prevent the thread frompassing backwardly beneath the shuttle to the right- -hand endof the shuttle frame as the arm 30 is moving in a clockwise direction'from its solid line position of Fig. 7. The thread portion will be secured in its dotted line'position of Fig. 7 until the arm 30 has been moved substantially to its solid line position shown in Fig.8. When the arm 30 has been moved substantially to this position the thread will be moved away from the shuttle and will occupy its position A shown in Fig. 8. It will be observed that with the elements in their positions shown in Fig. 8 the thread portion will not be locked at the left-hand end of the shuttle frame upon continued motion of the arm 30 in viewof the to its extreme right-hand position as the arm moved from its position shown in F' 6 to its solid line position shown in Fig. In other words, while the arm is being moved in a clockwise direction from the position shown in Fig. 8 the shuttle thread portion will be allowed to move along the upper edge of the shuttle to the right-hand end of the shuttle frame so as to be wound crosswise on the spool from left to right. At the righthand end'of the shuttle the thread portion Wlll be engaged by the right-hand shuttle,

arm 70 so that the motion of the thread portion will be stopped for a subsequent revolution of the arm 30 after the thread has engaged the arm 7 O. In this manner the shuttle thread portion is moved intermittently through a closed path of motion the pauses occurring at the ends of this path of motion.

7 In other words, the shuttle will be controlled by the motion of the guiding arm 30 and the tension in the thread so as to allow the thread to be moved back'and forth crosswise of the spool and will operate to hold the thread at the end portions of the j shuttle frameso that the thread will be wound in'relatively heavy deposits on the end portions of the spool.

It will be observed that after the shuttle arm 70 has engaged the thread as shown in Fig. 6 and has been moved to its extreme right-hand limiting position as shownin I Fig.' 7 that the thread A will have been moved slightly towardthe right and that as .the arm 30 moves from its solid to its dotted line position in Fig. 7 the thread portion in moving from lts solid line position A (Fig.

, 7) to its dotted. line position A (Fig. 7) will be moved still slightly further toward the rlght. ThlS is important because it provides for a distribution of the thread over crossovers of the thread will be controlled by the speed of the arms 30 relative to the speed' of the winding spools. The slower that the arms 30 revolve the greater will be the quantity of insulation placed at the ends of thewinding layer ,and' next to the flanges of the spool and conversely the faster the spools revolve relative to the speed of thespools the less will be the amount of insulation placed at the ends of the spool. The speed of the arms, as has been pointed out, will be controlled by means of the cone distributing the material tobe wound on said spool comprising a shuttle and means for causing the length of material passed to said spool to more through aclosed path of motion around said shuttle: so that the material is wound crosswise of said spool, said.

shuttle being arranged to delay the motion of said length temporarily at each end of said path of motion.

8. In a winding machine, the combination with a winding spool of means for rotating said spool, a shuttle, guides for said shuttle arranged so that said shuttle floats tl'icrein, said shuttle and guides defining a closed path of motion around said shuttle for the length of material passed to said spool, and an arm for guiding said length of material to said shuttle, means mounting said arm for rotation and for imparting rotary motion thereto whereby said length is caused to move in said closed path of motion around said shuttle, said shuttle being arranged to give said length a pause at each end of said closed path of motion so as to deposit relatively large amounts of'said material at the end portions of said spool.

9. In a winding machine, the combination with a winding spool of means for rotating said winding spool, an arm for guiding the material to be wound toward said spool, means rotatably mounting said arm and for imparting rotary motion thereto so that one portion of the length oftsaid material'between said arm and said spool is caused to move through a continuous circular path of motion and a shuttle interposed between said arm and said spool operably associated with said length of material so that the portion of said length intermediate said arm and said spool is caused to move through an said shuttle in aclosed path of motion, arms on the ends of said shuttle arranged to close intermittent closed path of motion. I

10. In a winding machine, the combination with a winding spool of means for rotating said spool, a shuttle disposed adjacent said spool, guides mounting said shuttle for limited vertical and longitudinal motions thereon so that the material to be wound can be passed to said spool between said shuttle and said guides and can be moved about said path of motion at the ends thereof when said shuttle is at the respective limits of its longitudinal path of travel, an arm, means mounting said arm for rotary motion and means for rotating said arm, said arm being provided with an eye through which said material to be wound is passed to said shuttle so that when said arm is rotated the length of said material between said arm and said spool and passed between said shuttle and its guides tends to move in its closed path of motion around said shuttle, the arms carried on the opposite end portions of said shuttle being arranged to alternately'engage said materialas it is being moved about said shuttle by the motion of said guiding armso that when either one of said shuttle arms engages-said material the motion of said material about said shuttle is stopped while said guiding arm is moved through the succeeding revolution of its motion and during which revolution said shuttle is moved to the opposite limit of its longitudinal path of travel to allow said material to move freely past said one arm during the second successive revolution of said guiding arm and so as to render said other shuttle arm effective to stop said material in its path of travel.

11. In a winding machine, the combination with a winding spool of means for guiding the material to be wound to said spool comprising means for causing the length of material passed to' said spool to tend to move through a 'closedpath of motion arranged lengthwise of said spool and a shuttle mounted to be moved between a pair of limiting positions and arranged to engage said-length of material when in either of said positions so as to stop the motion of said length, said shuttle being operably associated with said material so as to be moved alternately to said limiting positions by the tension in said material as said length tends to move about said path.

12. The combination with a winding machine comprisinga spool on which an electrical conductor is wound in successive layers so as to form an electrical 0011 of means for applying threadlike insulating material -be- Y shuttle, means for imparting to a second' portion of said length a rotary motion so I that the first portion thereof passed through: said framework tends to move about said shuttle and thereby move lengthwise of said spool, said shuttle being arranged so that when it is in either of the limiting positions 1o tionl with a wiiidi-i'l g i m ate atdtdfiter le al' esi enetaa an intermittent 1 P9Lth0f'inotion arrangedlengthwise 'of said Wid 1 Shuttle mounted to float inf siilid frame so as to have a limited longitudinal d'.. e 7t cal.ms io' herei h aid spool. '14. In a winding machine, the combination with a winding spool mounted for rotation of means for rotating said winding v spool, an arm for guiding the lengthof material passed to said spool, means mounting said arm for rotary motion on a fixed.

axis substantially perpendicular to the longitudinal axis of said spool,'whereb a pertion of said length is moved throng a continuous curved path of motion and means interposed. between said arm and said. spool operably associated with said length of material so as to convert the rotary motion imparted thereto by said arm to an intermittent. closed path of motion arranged lengthwise of said spool and having the-pauses in the motion of said length occurring at the end portions of said spool. I

15. In combination with a winding machine comprising a flanged winding spool on which an electrical conductor is woundon in successive layers so as to form an electrical coil of means for applying threadlike ina5 .sulating' material between said successive layers and between the succeeding turns of.

each'layer,'said means comprising an arm,v

pivotal .meansmounting said arm for rotation on a fixed axis substantially perpendicuto lar to the longitudinal axis of said spool and. substantially midway of the length of said spool, an eyelet through which said threadlike insulating material is passed to said spool carried by said arm on a radius greater than one-half of the lengthof said spool, means for rotating said arm so-that said eyelet carries the thread portion passed therethrough in a continuous curved path of v motion, a frame interposed between said spool and the plane of motion of said eyelet through which said thread is passed from said eyelet to said spool, said frame having a length substantially equal to that of the effective winding length of said spool and 05 arranged substantially coextensively therearm effective to sto said thread when it is moved. about-said s uttle to the position said other'arm. q r

'16, In a winding machine, the combina tion with a winding spool, of means for rotatably mounting said winding spool, means for rotating said winding s 001 andmeans for distributing the material to be woundto said spool comprising a shuttle, a rotatably mounted guiding arm arranged to cause the material passed to said spool to move. through a closed path of motion;;; around said shuttle so that said material is wound crosswise of said spool, said shuttle being arranged to delaythe motion of said length temporarily at each endof its said pat of motion and a driving connection been; tween said spool rotating means and said arm whereby a substantially fixed speed ratio is. maintained between said'spool and said arm. e

17.' In a winding machine, the combine-es tion with a winding'spool, of means for rotating said winding spool, an arm for guiding the material tobe wound toward. said m spool, means mounting said and for rotary motion so that when said arm is rotated one a portion-of the length of material passed to said spool is caused to move through a continuous curved path of motion, a driving connection between said means for rotating saidspool and said arm whereby a substan: m3 tially fixed speed ratio is maintained be-I tween said spool and said arm, means inter- 12g posed between saidarm and said spool operably associated with said arm for causing a portion of said length of material between said arm and said spool to move through an intermittent closed path of motion, means 1 5 providing for movementof said arm to a working position with respect to said spool {35 and to a position remote therefrom, and means-for automatically rendering said driving connection between said driving means and said arm ineffective -when said am is moved to its said remote'position;

'18." In a winding machine, the combina-- tion with a winding spool mounted for rotation of a shaft for rotating said, winding spool, an armfor guiding the material to be wound toward said spool, a framework,

' means mounting said arm for rotary motion on said framework, said 'arm being arranged so that when said arm rotated a portion of the length of the material passed to said spool is caused to move through a continuous curved path of motion, means interposed between said arm and said spool; operably associated with said length of material for converting the rotary motion imparted thereto by said arm to anintermitdzo - wise of sai the motion said length occurring at the end ortions of said spool means includinga driving belt between sald shaft andsaid arm for imparting rota motion to said arm, and means" pivotal y mounting said framework for movement to a working position with res] ect to said spool and to a posi tion remote t erefrom, sald framework and driving belt being operably associated with respect to .eachother so that said belt is rendered ineffective to transmit motion from said shaft to said arm when said framework is moved to said remote position.

- WIL IAM N. names.

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