US1616111A - Means for making electrical coils - Google Patents

Description

I v l *,111 Feb' -1 1927' A. D. cARDwELl. 16 6"" lMEANS FOR MAKING ELECTRICAL COILS Filed .my 14, 1925 e sheets-'shet 1 17f- In: f=== 2^? HIIlDlll INVENTOR /llen 0.V Cardwell ATTORNEY 927 A. D. cARDwELL MEANS FOR MAKING ELECTRICAL GOILS me@ July 14, 1925 s sheets-sheet 2 2% I K y INVENTOR y 6,/ Hilf/v (dm/well I .fx1 l BY 0 1? E l ATTORNEY Feb. 1 v1927.

A. D. CARDWELL MEANS FOR MAKING ELECTRICAL COILS G Sheets-Sheet 3 Filed July 14, 1925 INVENTOR llen 0. Cardwell ATTORNEY eb 927 A. D. CARDWELL MEANS' FOR MAKING ELECTRICAL COILS Filed July 14, 1925 6 Sheets-Sheet -4 .ATTORNEY Feb. 1 1 2 1616111 9 7" A. D. cARDwr-:LL MEANS FOR MAKING ELECTRICAL COILS 4 Filed July 14, 1925 6 Sheets-Sheet 5 INVENTOR #IIe/7 afa/dwell ATTORNEY 7 A. D. cARDwELL v MEANS FOR MAKING ELECTRICAL GOILS Filed July 14, 1925 6 Sheets-Sheet 6 INVENTOR /71/ @H Cardwell BY ,A ffl ATTORNEY Patented l, i927.

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eater MEANS FOR MAKING ELECTRICL GDILS.

Applz'icaton tiled July 14, 1925. Serial No: 43,527.

.ln my application for Letters Patent for improvements in transformers and inductances, tiled May 16, 1925, Serial No. 30,666, l have set forth Various 'forms ot coils'ot a wire adapted for use in electrical instruments. such as in radio receiving sets, etc., wherein the turns ot windings ot the coil are secured together and spaced apart by means oit longitudinally disposed binding` cords and ie other cords looped across each oit the turns et convolutions oi the coil, located between adjacentturns, and looped around the longitudinal cords, toi-ming a binder tie at each turn.

The object ol" my invention is to provide an improved method ot and means for producing;` coils of the character above set forth, whereby any desired number ot longitudinal cords and corresponding binding` cords may 2G be associated with the turns or windings ot the coil in a simple and accurate way, and whereby such turns or windings will be securedftogether in spaced relation providing coils not requiring cores to support them.

In carrying out my invention l wind a conductor, either bare or insulated, in turns or conyolutions side by side, lay one or more longitudinally disposed cords adjacent to said turns or convolutions and loop a bind- 3f? ing' cord around the corresponding longitudinal cord and across turns or convolutions o the conductor in such a way that portions oi the binding` cord extend between adjacent turns or convolutions, whereby the turns or coumlutions are secured together in spaced relation.

ln the torni ot mechanism l have illustrated in the accornpanying` drawings l pro vide a mandrel and means to wind turns or convolutions ot wire therearound, means to lay one or more longitudinal cords along the tui-us or convoliuions as wound, and means to cause a looping' cord to be paf-Sed around lli the longitudinal cord 'lfor turns ot conductor.

aiulacross the latter, either from the outside or trom the inside thereof, and so on successively as the turns or con'yolutions of the conductor are laid around the mandrel.

My invention also comprises novel details ci' improvement that will be more t'ully hereinafter set 'forth and then pointed out in the claims.

Reference is to be had to the accompanyii'lgwdrawings forming' a parthereot, wherein Fig. 1 is a 'side elevationV ot a mach-ine adapted te carry out my invention;

Fig. 2 is an enlarged detail' section on line 2, 2. in Fig. 1;

Fig.l 3 is a detail ot Fig. 2;'

Fig'. 4 is a-cletailplan View illustratingl the assembly or" par-ts i'or laying'the" longitudinal and binding` cords in conjunction with wire turns, taken approximately along line t, 4f, in Fig-1;

Fig. 5 is a detail View looking upwardly, substantially on line 5, 5,1in Fig. 1;'

Figli' is a cross sectional View substantially in the plane offline 6, 6, in Fig.' 4;

Fig. i' is a fragmentary View'looking' upwardly at Fig. 6;

Fig; 8 is a detail side View illustrating gearing tor operating the rotary controlling cam for the longitudinal cords ot' the coils, and -for the looping cords;

Fi is an enlarged detail sectionlthrough one ot the devices for laying the binding or looping cord-g Fig. 10 is a detail View, partly broken, sub-- stantially on the plane of line 10, 10, in Fig. 9, looking?,` in the direction of the arrow ;Y Fig. 10EL is a section on line 16J, 10a, inFig; 1`0`;

Fig. 11 is a detail View lookingl from the right hand side ot Fig. 9, illustrating parts in a different position from Fig; 10;

Fig. 12 is a side View of tensioning means tor a longitudinal cord. y

Fig'. 18 is a side riew looking from the right hand sideot Fig; 12;

Fig'. 14 is a partij, broken plan View ot Fig. 12';

Figs. 15 to419 diagrammatically illustrate steps in winding` a conductor and laying lonritudinal and binding or looping cords 1n connection therewith;

Fig'. 2O is a side View illustrating my iinproved coil; and

Fig. 21 is a Side View of Fig'. 20.

Similar numerals oi reference indicate corresponding, parts in the'several views.

At l'is a` traine or support shown in the form ot' a ring which may be supported in any suitable manner, such as by legs 2 suitably attached to said frame. At 3 is amandrel or 'l'orm around which the conductor wire A, which may be insulated or` bare', is adapted to be wound in suitable turns or convolutions. (Figs. `15 to 21), which .mandrel is shown centrally disposed within trame or ring; 1 and is preferably supported to depend within said ring, as illustrated in Figs. 1 and 6. The mandrel 3 is shown depending a' cross bar 5 supported upon llt) Ytrame or ring 1, as by means ot posts (3 secured on said lrame or ring, so that the bar 5 progects trom the 'trame and the mandrel depends in such a way that when the conductor A is wound along the lower portion ot' the mandrel the coil will advance downwardly from the mandrel and hang therefrom. By preference a portion ot' the mandrel is tapering at 3a', (Fig. G), so that as the conductor A is wound at the tapering portion the latter will serve to force the successive convolutions downwardly along the mandrel to feed the coil. It will be obvious that the mandrel may stand upright instead ol depending, in which event the coil will be ted upwardly instead ot downwardly. The conductor or wire A is "arried on a spool 7 and is led from the spool to a guide tube s 8, being shown guided to said tube from the spool by means ot a pulley 9 and a stud 1U, and through a tensioningv device 10a, (Figs. 6 and 7). The spool 7 is detachalily carried by brackets 1l. The parts 7, S, 9, 10, 10a and 11 are carried by a guiding ring 12 that is rotative within the inner guiding surface 1a o1 frame or ring 1, so that the spool will be rotated around the mandrel to wind the conductor thereon. The guide ring 12 is shown rotatively supported in connection with the 'trame or ring 1 by means of upper and lower annular plates 13, 14 secured to said guide ring, as by screws 15, with the outer marginal portions of said annular plates opposing the adjacent edge portion of frame or ring 1, (Figs. K2 and 6). The guide ring 12 is provided with an annular gear 16 which may be secured thereto by the screws 15, which gear is shown below the annular plate 14: and may be rotated in any suitable way. l have shown a pinion 17 in mesh with gear 16 and carried by a shaft 18 journaled in bracket 19 hung from 'trame or ring 1, (Figs. 1 and Shat't 18 is provided with a bevel gear 2() in mesh with a bevel gear 21 carried by shaft 22 journaled on bracket 19. Shaft 22 is shown provided with pulley 23 receiving a belt 24C which' may be driven by a motor 25 supported by legs 2, (Fig. 1).

During the rotation of guide ring 12 the conductor A will be wound around the mandrel, the turns or convolutions of the conductor succeeding one another to produce the coil, such as illustrated in Fig. 20. rit l, C are binding cords for securing the turns or convolutions ol the coil together in spaced relation. I use the term cord in the specification and claims in a generic sense, intending it to mean ordinary cord or twine in round or other cross section, or a strip of tape or ribbonlike element ot' insulating material.

The cord B is laid to extend along the turns or windings of the coil, either outside of the same or within the coil, or partially outside and partially within the coil, as illustrated in Fig. 2l, and the cord C is used as a looping or binding cord. I have illustrated means for apl'ilying six longitudinal cords ll in connection with the coil and six complemental looping or binding cords C, and since the means l. have illustrated for laying and looping the cords is the same for each pair ll, C thereof the description ot the mechanism for laying one set ot' cords B, C, will sultice tor all, it being understood that such mechanisms are placed in suitable spaced relation around the mandrel so that the complemental or pairs of cords will be laid and looped in conjunction with the. turns ot' the coil successively as the latter are wound around the mandrel.

rl`he longitudinal cord B is supplied on a spool 32 whose spindle 3B is journaled in bracket 34; secured upon a ring or plate supported by the 2 above the winding and cord laying mechanism, (Fig. 1). Bracket 341 is shown slotted at 3l for dciachable reception ot' spindle 33. The spindle is provided with a pulley 3G, and nut 87 threaded on spindle 323 serves to dctachably secure the spool to the spindle,

(Fig. 13), by forcing the spool against the pulley. 'the cord ll passes over a guiae pulley 3S journaled overhead at the end ot i' an arm 39 journaled at fl() upon bracket 311. spring 4-1 connected with the arm and with bracket SH- serves to resiliently cause pulley 38 to rise to apply tension to cord ll from the pulley to a guide l2 below, through which guide the cord passes for guiding it to the mandrel. At 43 is a cord passing around pulley 56 and connected at one end to bracket 341-, at ed, and at the opposite end cord 43 is connected to a. spring that connected at Llo to arm 39, (Fig. 12), whcreby the cord 113 exerts t'rictional resistance oit rotation to pulley 3G and thereby to the spool carrying the cord B. The guide l2 is pivotally supported upon trame or ring l, at l2, in bracket 4t? secured upon said trame, so that the tree end oi" the guide may rock relatively to the mandrel, as up and down rcspecting the same, (Figs. 1 and 6). As a means for rocking guide 4t2 in timed relation to the rotation oit the co'mluctor-guidc 8 around mandrel 3 I provide a cam-member or wall 48, upstanding troni and secured to the ring plate 153, as by means ot' brackets Llf), (Figs. (S and rllhe cani-member stel is ot suitable length, the ends ot said cani-member at L18 being suitably curved downn wardly toward plate 153 to travel under and raise the guides successively and to pass therefrom to permit the guides to descend success tully, the guides being preferably provided with rollers at 12b to engage the upper edge of cam-member 18, (Fig. 6). A spring at may be connected with the `guide 42 and with frame or ring 1 tending normally a. conclltl 1', (ii-arri' to depress the guide, and at 51 is a stop for the. guide tolimit its downward movement (F ig. 6).

The cord B, alterl'eaving the delivery end ot guide 4Q, is located with rela-tion to the mandrel 3, as indicated i'n Fig. 6, in suchi a 'Way that each time that the guide 8`r lays a turn o'i5 conductor A in appropriate position against the mandrel suchportion ot the conductor will be in conjunction with the cord ll which will pass longitudinally along the coil as made. At such point the binding or looping cord C is looped around the longitudinal cord B and partially aroundV or across the corresii-cnding portion of the conductor turn. The cord C iscarried on a spool 53 which is adapted to be rot-ated bodily around the cord B1 to loop the cord C therearound. The spindle of spool 53 is journaled in brackets secured upon a rotative disk 55 that is journaled in an annular raceway 56 in a head 56 that is scoured to and depends 'from the 'traine or ring 1, (FigL 9). The head has a bracket or supporting portion 57 secured'thereto by bars or bolts 56, whereby the parts 56 and 57 are secured together in spaced relation. The bracket 57 is secured to trame l by screws 59passingV through a flange portion 60 of' the bracket, Whidh flange portion isV preferably provided with arcuate. slots 61l receiving said screws so that* the bracket 57 and the head 56' may be adjusted angularly with respectv to the mandrel, (Figs.` 5 and 9). The'disk 55Vis pr'ovidedl with a ring, gea-r' 64 that is secured to said disk by screws and rotates the disk, (Fig. 10). The raceway 56 is formed between a surface 56b`on one side oflhead'56, an annularly disposed bearing seat 56c on said head and a ring-like plate 62 secured to said head by screws 63', (Fig: 10a). The disk rotates against the tace 56, seat 56C' and plate 62, thereby rotatively supporting gear 64. The upper portion olplat'e 62 is cut away at 62, (Fig. 10), and adjacentv outer portions of the disk 55 and the ring gear 64 are also cut away or open at 66, (F 11)` so that when the parts are in the position shown in F 10 the cord B' may be depressed into the interior of plate 62, disk 55 and the ring gear 64, by the' downward movement of guide 42, `to enable the spool to be rotated bodily around the said cord. The disk 55 is shown provided with hole 67 through which the cord C from spool 53 is guided to a tension device 68 carried by the disk, a guide eye 69 on the disk receiving the cord from the tension device, whence the cord 'passes through a boreV 70 in a guide yarm 70 secured on disk' 55', (Figs. 9 and l1). The guide arm rotates with the disk and serves to lay the cord C around the cord B at certain times when the. cord B has been depressed into the opening in disk 55. Forrotati'ng thedisk 551 journal uponlthe head 56 spaced pinions 71 both iiimesh Withlgear 64, for spanning'tlie space at 66 in Said` gear, (Figi 10), said pinions being also' in mesh with a drive gear 72 secured on shaft 73 'ournaled in bearine's in` I v tn The shatt 73 isprovided head 56, (Fig. 9). With a beyelgear 74 1n mesh with a drive gear 'l5 secured onf averticall sliat't 6 3our nalediirbearings in bracket 57.V or" head 56v at 16, and the teeth are continuousaround the upperportion ofi the gear,- (Fig. 8). rLhe arrangeinenty is such that when gear 77 engages teeth 16'the shaft 76willfbe rotated, and thereby through the gearingY 75,721,173,

72 and 71 the ring gear 64 will be givenv one complete rotation from3 the position shown inV Fig'. lOivher'e the spaces 62@ and 66 are in register with the space 56d ot head 56, at the time that the cord B has been depressed? throughl such spa-ees so that the spool 53 will carry the cord C around the' cord B. Thereupon such teethl oli" gearl` pass from gear7-7 andthe latter comes to resti' with the spaces 62EL and 66 again in register; During the period of rest the reduced? smooth surface, at 16a of gear 16, Where the teeth are omitted, will oppose the gear 77 Without rotatingit,and at such time the concavereduced surface 78 of' disk 78 that is secured onshafft 7 6? will engage the annular surface 14 olfv ring plate 14 to keep shaft 76 fronirotating, and thereby to keep spool 53 :trom being bodily rotated, (Fig. 7). When the gearf77 engages the teeth 16 the annular surfaceot the disk78 will rotate along a reducedf annular edge portion 1`4b'of ring plate 14 sothat the gear 77 may be rotated by gear 1'65 One inclined portion14c of ring pl'ate 14 perinitsthe reduced surface 78L of disk 78 to rid-e to one end of the surface 14b andthe other inclined sur#` face at 14c pern'iits-the reduced part 7S of gear'78 to ride uponthe annular portion 142l ofthe ring'plate 14, (Fig. 7). By the means descrfibed'tlie fear 77 is caused to rotate once for each complete rotation ol gear 16 butr sponding cords C will be looped' With the conductor turns or windings and With the corresponding cord B. It will be under stood, however, that any desired number ot appropriate parts ilfor laying any desired number ot compleinental cords B and C may he arranged relatively to the mandrel.

`lli/'hen the spools are supplied with cords and the spool 7 is supplied with conductor A the ring 12 will be rotated clockwise in plan, (Fig. Li), with all ot the cords B hanging downwardly and the tree ends ot' the cords C tied to the tree ends oit the cords B. As the ring is rotated its guide 8 will ca use the conduct-or A to be wound around the mandrel, `tirs-t binding the tree ends 'et cords B, C thereto. During rotation ot ring 12 the cam member a8 will cause the cord guides 4t2 to rock vertically in timed relation to the laying ot the conductor turns around the mandrel in such a way that each time the guide 8 passes a cord Bthe corresponding guide i2 will be depressed to carry such cord downwardly through the opening 62a in head 56 when the openings in the ring guide 55 and in the gear (lll register with the opening 62a, as in Fig. 10. )Vhile the guide l2 and its cord B are thus held depressed the teeth of gear 16 `will engage the corresponding gear 77 and cause one complete rotation thereof, whereupon the ring guide 55 will be correspondingly rotated once and the spool 53 will becarried bodily around the depressed cord B, there` by carrying the cord C from a position substantially as shown in Fig. 15 to a position substantially as shown in Fig. 16 with the cord C looped around the cord B. W'hen the teeth 16 pass from gear 77 and its disk Z8 next engages the surface 14 ot plate 1&1, said gear will be retained from rotating until its next cycle the cam member 18 will cause the corresponding guide 12 to rise and lift cord B through openings 62a, etc., and thereby spread the looped cords C and B trom the position ot Fig. 16 substantially to the position of Fig. 1? and there retain them until the turn of the conductor A is laid on the mandrel and brought to a position between said cords, substantially as illustrated in Fig. 18, so that wit-h the guide 8 drawing the turn ot the conductor against the mandrel such conductor will engage the adjacent cord C and torce it toward the mandrel, as illustrated in Fig. 19. It will be noted that when cord C has been looped around cord B said cord C will have passed over the preceding conductor turn o, (Fig. 17), so that when said turn a of conductor A has been pulled snug to a position parallel with the other turns ot the coil the looped portion 0 of cord C will be snugged between the said conductor turn and the preceding` turn, as indicated in Figs. 18 and 19. Simi-v lar operations occur` for each pair ot the cords B and C each time the guide 8 passes said cords at the mandrel. so that the comple/mental` cords B and C are successively laid and looped with respect to the turns o1 the conductor and with respect to themselves successively during winding ot the conductor around the mandrel. It will be noted that the cord C is not wound around conductor A with a complete turn but is looped between each two adjacent turns of the conductor and across the same, and is looped completely around the oord B, whereby the turns lot the conductor coil. are secured together in spaced relation. After a desired length of coil has been produced he ends ot companion cords B, C may be secured in any desired wa f, such as by llrnots at D.

ln the coil in Figs. 2O and 21 I have illustrated the longitudinal cords as alternating within and without the turns ot the conductor, but it will be understood that said cords may all be without or within the conductor, as desired, instead ol alternating as illustratec. there the longitudinal cord is within the conductor the binding cord is looped across the outside ot the corresponding conductor turn and looped around the longitudinal cord within the coil, whereas when the longitudinal cord is without the conductor the binding cord is looped over the longitudinal cord and is looped within the conductor, (see Fig. 21). l/"Vhere it is desired that the longitudinal cord of the coil shall be on the inside of the wire convolutions and the looping cord shall be on the outside of the convolutions the tensions on the cords are adjusted so as to maintain the inner cord (cord B) taut and permit the looping cord (cord C) to bind the wire with a loop. Nhere it is desired that the longitudinal cord shall lay outside of the wire convolutions the relative tensions on the cords are reversed or so adjusted that they will maintain the looping cord (cord C) taut and the tension on cord B is released so that the cord B will be pulled between the wire convolutions by the looping cord and cord B will then form the loop around the wire convolutions from the inside and the other cord C will be the eX- terior longitudinal cord. To accomplish the lastnamed results the cord intended to be the longitudinal cord may be placed upon the spool 53 and the cord intended to be the looping cord may be placed upon the spool 3s.

In the example illustrated the central mandrel is shown as circular in contour with grooves to receive the inner longitudinal cords, but the mandrel can be triangular or ot any desired polygonal shape in cross section according to the contour of the coils desired to be made, and the cords may be located at any place around the circumterence or the sides ot the coil. While in Fig. 2O I have illustrated a coil of straight formation in a longitudinal direction it will be understood that the coil may be inadeof sufficient length to be formed int-o toroidal or annular shape, such as illustrated in my aforesaid application.

Having nonv described my invention what l claim is:

l. li machine ot the Vchaiacter described comprising `means to wind a conductor to form a coil, means to guide acord across the winding, and means to loop another 'cord across turns of the Winding around lthe first named cord and `betiverm adjacent turnsto secure the turns in spaced relation.

llt machine of the character vdescribed comprising mean-s to Winda conductor to form a coil, means to guidecords across the winding in spaced relation, and vmeans to loop other cords across successive turns ot the conductor and around corresponding first named cords successively in position to be located between successive conductor turns.

A machine of the character described comprising means to Wind a conductor to orm a coil, means to guide a cord across the winding, and means to support a Spool oi cord and rotate it around the first named cord and across turns of the conductor, said irst and second named means maintaining` the cords in position to permit the conductor turn to pass therebetween.

4t. A. machine ot' the character described comprising means to Wind a conductor to iorm a coil, means to support a cord in operative relation to the Winding, means to guide said cord, means to operate the guide to change the position of the cord relatively to the Winding, and means `to support a spool of cord and rotate the spool bodily around the first named cord, said guide being adapted to separate the cords to permit the Winding means to pass therebetween.

A machine of the character described con'iirising means to Wind a conductor to form a coil, means to guide a cord across the Winding, a. rotative disk having an opening for the oassae ot the first named cord means to support a spool of cord upon said disk for rotation bodily around the first named cord, and means to rotate said Hair and spool to loop its cord'around the first named cord in advance of the conductor tarn to admit the latter between said cords.

6. A machine as set forth in claim 5, in which means are provided to operate said guide to pass the cord through said opening into and from the disk` 7. A machine of character described comprising means to Wind a conductor to form a coil, means to guide a cord across the winding, a rotative disk having an opening ior the passage ot the first named cord, means to support a spool of cord upon said disl; for rotation bodily around the first named cord,and means to rotate said disk and spool and bring them to rest once for each looping yotl the second named cord around the first named cord.

8. A machine of the character described comprising ,means to Wind a conductor to torni a coil, means to guide a cord across the Winding, a rotative disk having an openingfor the passage ot the tirst named cord, means to support a spool of cord upon said disk for rotation bodily around the first named cord, means lto rotate said dist and spool to loop itscord around the first named cord in advance oi" the conductor turn Vto admit the latter `between said cords, means to maintain tension on the first named cord, and means carried by said disk to maintain tension on the second named cord lbetween its spool and the Winding.

9. A machine of the character described comprising a mandrel, means to support a conductor for rotation around the mandrel,

a .guide for theconductor guided around theV mandrel, means to guide a cord-along the mandrel, a spool for a second cord, and means to support said spool for rotation bodily around the first named cord.

l0. A machine of the character described comprisiiig a mandrel, means to support a conductor for rotation around the mandrel, a guide for the conductor guided around the mandrel, means to guide a cord along the mandrel, a spool tor a second cord, means to support said spool for rotation bodily around the iirst named cord, and means to 'cause said cird guiding means to mov-e toward and from the second named cord to place the first named cord in position tor rotation of the spool therearound and to separate said cords to admit the con ductor therebetween.

ll. A machine of the character described comprising a mandrel, means to support a conductor for rotation around the mandrel, a guide tor the conductor guided around the mandrel, means to guide a cord along the mandrel, a spool for a second cord, a rotative disk carrying said spool, said dislr having an opening to admit the irst named cord, guiding' means rotatively supporting the disk, and means to rotate said disk and spool to carry the spool around the first named cord and loop the second named cord across a conductor turn.

l2. A machine'of the character described comprising a mandrel, means to support a conductor for rotation around the mandrel, a guide for the conductor guided around the mandrel, means to guide a cord along the mandrel, a spool for a second cord, a rotative disk carrying said spool, said disk having an opening to admit the first named cord, `guiding ieans rotatively supporting the disk, and means to move sad cord guide toward and from the spool relatively to the mandrel to admit the cord into and remove it -from said disk.

13. A machin-e of the character described comprising a mandrell` means to support a conductor for rotation around the mandrel, a guide for the conductor guided around the mandrel, means to guide a cord along the mandrel, a spool for a second cord, a rotative disk carrying` said spool, said disk having an opening to admit the first named cord, guiding means rotatively supporting the disk, a ring gear connected with said disk and provided with an opening in its side, pinions in mesh with said gear, and

.means to rotate said pinions to cause the disk to rotate the spool bodily around the iirst named cord to loop the second named cord therearound.

14. A machine of the character described comprising means t o Wind a conductor to form a coil, means to support a cord relatively to the Winding, a guide for said cord pivotally supported With relation to the Win-ding, a rotary cam member to move said guide to operate the cord relatively to the Winding, and means to support a spool of cord and rotate it bodily around the rst named cord between said guide and the Win-ding.

15. A machine of the character described comprisingmeans to Wind a conductor to form a coil, and mea-ns to locate a cord along the turns and to loop another cord around the first named cord to locate portions of one of the cords between turns to secure the turns in spaced relation.

16. A machine of the character described comprising means to Wind a conductor to form a coil,y means to guide a cord across the winding, means to loop another cord across turns of the Winding around the rst named cord, and means to apply tension to the second named cord suiioient to draw the first named cord between turns of the Winding` and around the second named cord and to locate the second named cord along,` the Winding.

ALLEN D. CARDVVELL.

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