US1512116A - Winding machine - Google Patents

Description

(lath 211 9 E9240 Lafiw E. N. LIGHTFQQ WINDING MACHINE s sheets-sheet 1 Filed Feb 25'.

s Sheets-Sheet s ct. g E. N. LIGHT-FOOT WINDING MACHINE Fild Feb. 26,

Oci. 21 1924. I 1,512,116

- r-z. N. LIGHTFLOOT:

WINDING MACHINE I Filed Feb, 26, 1920 6 Sheets-Sheet 4' Get. 21 192% E. N. LIGHTFOOT WINDING MACHINE 1920 6 Sheets-Sheet 5 Filed Feb. 26

AVE

' E. N. LLGHTFOOT WINDING MACHINE Filed Feb. 26, 1920 6 Sheets-Sheet 6 Patented Get. 21, 1924.

EDWIN N. men'rroor or new MFG. (30., OF MILWAUKEE, WISCONSIN,

YORK, N. Y., ASSIGNOR TO THE A' CORPORATION OF WISCONSIN.

WINDING MACHINE.

' Application filed February 26, 1920. Serial No. 361,513.

To all whomz't may concern.

Be it known that I, EDWIN N. LIGET'FOOT,

a citizen of the United States, residing at New York, in the county of Brtnx and State of New York, have invented new and useful Improvements in Winding Machines, of which the following is a specification.

This invention relates to Winding machines. -Such machines are particularly useful for winding a resistance wire or strip, commonly called a resistor, on a flat insulating core, although not limited to such use.

An object of this invention is to provide an improved winding machine wherein the pitch may be readily and quickly varied during the operation thereof.

Another object is to provide means for presetting a change in pitch whereby the change in pitch may be made quickly during the winding operation.

Another ob'ect is to provide improved means for feeding and guiding through the winding head the insulating core upon which the resistor is to be wound.

Another object is to provide improved means for guiding the material to be wound to the core on which it is to be wound.

Another object ,is to'so apply the resistor to the insulating core that both are fully protected against damage.

' Other objects and advantages will appear from the specification and claims.

An embodiment of the invention is illustrated in the accompanying drawings.

In the drawings, v

Figurel is a top planof the winding machine, parts of the.winding head being omitted for the sake of clearness.

Fig. 2 is a vertical section on line 22 of Fig. 1;

Fig. 3 is a. front elevation 'of the pitch adjuster;

Fig. i is a vertical section on line 4-4 of Fig. 3;

Fig. 5 is a front elevation of the winding head; i

Fig. 6 is a horizontal section through the oscillating guide on line 6-6 of Fig. 5; Fig. 7 is a central vertical section through Fig. 5;

Fig. 8 is an enlarged view of the adjustable core guide shown in Fig. 7

Fig. 9 is a vertical section on line 9-9 of Fig. 8; I

Fig. 10 is a horizontal section on line 10-10 of Fig. 8;

Fig. 11 is a perspective of the adjustable plate and arm of the core guide; and

Fig. 12 is a perspective of the roller carrying arm of the core guide.

The winding machine comprises, in general, a winding head 5 for winding 3. resistor on'an insulating core, a pulling stock 6 for pulling the insulating ,core through an opening in the winding head and a pitch adjuster 7 for controlling the relative speed of travel of the pulling stock and of rotation of the winding head, whereby the pitch *at whichthe resistor is wound upon the insulating core may be adjusted.

Referring to Figures 1 and 2, the bed plate 15 of the winding machine may rest upon a suitable support such as, for example,- a bench 16.

The driving shaft 17 is journaled near each end in supports 18 and 19 depending from the bed plate 15 through openings 20 and 21 in the bench 16. The shaft 17 1s provided with a driving pulley 22 bywhich the winding machine may be driven from any suitable source of power.

A spur gear 23 keyed to the shaft 17 drives the winding head. A bevel gear 24 provided on one end of the shaft 17 meshes with a second bevel gear 25 and through suitable mechanism to be described drives the pulling stock feed screw 26 journalled in brackets 27 and 28 mounted upon the bed plate 15.

The driving shaft 17 and the spur gear 23 and the bevel gear 24 carried thereby and the shaft bearings constitute a unit which is removable so that another unit having different gear ratios may be substituted therefor.

The bevel gear 25 may be fastened by means of a nut 25 and a suitable key to a vertical shaft 30 to the upper end of which may be keyed a friction plate or disk 31. The shaft 30 is journalled in a vertical extension 32 of a removable plate 32which 'forms a closure for an openlng in the bed plate15. The plate 32 is fastened to the bed plate 15 by means of screws 33. The shaft 30 is provided with a flange 34 which CUTLER-HAMMER rests upon a shoulder on the vertical extension 32 of the plate 32 whereby the shaft is supported.

The friction plate or disk 31 is movable along the shaft and is urged upward by a coil spring 35 surrounding the shaft. One end of the spring 35 rests against the bottom of the friction plate 31 and the other end against a collar 36 surrounding the shaft. The collar 36 rotates with the shaft and is slidable thereon, the shaft being provided with a slot 37 through which extends a pin 38 fastened in the collar 36. The tensionof the spring 35 may be varied by means of an adjusting screw 39 extending through a threaded opening in the shaft 30. The pin 38 rests upon the upper end of the adjusting screw 39,which may be locked in adjusted position by a lock nut 39'.

A felt washer 40 between the vertical extension 32 of the plate 32 and an annular downwardly extending flange 41 on the friction plate 31 protects the shaft bearing and associated parts from dust,;dirt, etc.

The friction plate prwheel 31 is provided with a friction sii'rface of suitable material, such as,-for.example, leather 42.

Theyjp'late 32 and; the parts carried thereby constitute-a unit. which may be easily and quickly removed for inspection and repairs by loosening the screws-33.v This may be'done without disturbing any other-part of'the windingmachine;

'able on the shaft 30, becomes badly worn, it

may be' easilyand quickly removed therefrom and-replaced by a new plate.

The friction plate 31' drives awheel 43 of suitable material, such as, for example fibre and is maintained in contacttherewith by.

the spring 35. The fibre wheel 43 is secured to a sleeve 44 by means of a nut 45 and may therefore be readily removed andreplaced by another wheel when desired.

The sleeve 44 is. 'ournall'ed 'in abracket 46 mounted upon til keyedto a shaft 47 journalled in the bracke bed plate 15 and} is et 27. The outer end of the shaft 47 isprovided with a spur gear 48 meshing-witha spur gear 49 on the end of thefeed screw-126$ The sleeve 44 is provided with two flanges 50 and 51. In the groove thus formed bee'xtending pins 53'and' 54. (See Fi s; 3 and 4.) The pin 53 works in the. slot 0 a guide. 55 carried by the arm -56"o f'a fork pivoted on a spindle 57 which may be supported in" a frame 58 secured. to the bed'plate 15. The a other pin' 54cworks in th'e'slot of a similar guide 59- carried by the other arm60 of the' the desired pitches on'the scale 63. One of pivoted fork.

and 69 in adjusted position.- I

Beforei starting to wind the resistor on.

the sleeve 44 on the shaft 47. When the sleeve 44 is moved to'the right, the fibre wheel 43 is moved nearer the center of the friction plate 31 whereby the speed of the sleeve is reduced. In this way the speed of rotation of the pulling stock feed screw 26 may be varied to control the pitch ofthe resistor being wound u on the insulating core.

The front arm 56 a so carries a pointer 62- pointer 62 is opposite the designation on the scale 63 which indicates the desired pitch. The fork may then be locke'd'in this position by'turning the handle 61 to tighten the screw 65 thus locking. the plate 64 and the arm- 56 between the head 67 of the sore and the inner end of the handle'61.

.1 In some classes of apparatus in whichheatjing elements are used, it is desirable that,

'85 windingma'chine for the desired pitch, the fork is moved by the handle 61 until the some portion or portions of the heating unit I develop greater heat than other portions. When the friction plate 31,'w hich 1sslid-" Where the" heating element employed comdegrees ofheat in different portions thereof bywinding the/resistor with different num 'bers of turns per unit length. Different "numbers of turns per unit length are olotained by varying the pitch at which the resistoris wound. The present wind ng machinels arranged to wind a reslsto'r with from approximately two and three-quarters to seventy-two turns per inch.

The pitch adjuster of the winding machine is arranged so that it may be preset for two different pitches whereby the pitch may be easily and quickly changed from one to the other during the winding operation.

To this end two adjustable stopscrews 68 and 69 are positioned on opposite sides of the arm 56. These adjustable screws are held. in threaded lugs 70'and 71 provided on the face-of the plate 64. Lock nuts 72 and .73 are provided for holdin g the screws 68 the insulating core, the arm 56 may be moved until the pointer 62 indicates one of lth e' stop screws 68 M69 is then adjusted until its inner end engages one side of the arm- 56. 5Tl'1e pitch adjuster may then be preset for the other of the desired pitches by moving the arm 56 until the pointer 62 indicates the pitch on the scale 63. The other stop screw may then be adjusted until its inner end engages the side of the arm 56 When the' proper length of the insulating core has been wound with the resistor at the desired pitch, the machine may' be quickly changed to wind at the'other preset pitch. This may be accomplished by grasping the handle 61 and quickly moving the arm 56 until it rests against the end of the other adjustable stop screw. Other spur gears mounted upon studs journalled in bearings 74 and 75-may be provided for changing the ratio of speed between the pulling stockfeed screw 26 and the shaft 47. These spur gears would mesh with each other and with spurgears of suitable size on the shaft 47 and the feed screw 26. Motion would then be transmitted from the spurgear on the shaft 47, through the gears journalled in the bearings 75 and 74 to the gear on the feed screw 26.

The spur gears and the associated thumb nuts 48 and 49' are protected by a casing 76 fastened to the bracket 27 by means of wing bolts 77.

A dovetail track or slide comprising angle rails 78 and 79 and overhanging cover strips 80 and 81 rests upon and is suitably secured to the brackets 27 and '28. (See Figures 1, 2, 3 and 4.)

Figures 1 and 2 show the pulling stock which comprises a base 85 which rests upon and is adapted to slide along the rails 78 and 79 of the track, and an upright 86 which may be formed integrally with the base 85 or otherwise suitably secured thereto.

The pulling stock is operatively connected with the feed screw 26 by means of a half nut 87. The half nut 87 is normally maintained in engagement with the feed screw 26 by a coiled spring 88 seated in a recess in the base and resting against the half nut 87 The half nut 87 may be moved out of engagement with the feed screw 26. To this end, a rod 89, whose lower end is connected with the half nut 87, is pivotally connected with a lever 90 fulcrumed in the upper endof a pin 91 which may be screwed into the base 85'. The lever 90 is provided with a handle 92 for moving the lever 90 on its fulcrum and thereby raising the half nut out of engagement with the feed screw 26. The pulling stock may then be moved readily along the track to any desired position thereon.

The engagement and disengagement of.

vate the half nut 87, the handle 94 is'moved back into its central position thereby elevating the right hand end of the lever 90, which carries with it the connected rod 89 and half nut 87-against the force of the spring 88,

The pulling stock is provided with a pair of clamping jaws 95 and 96 for gripping the insulating core upon which the resistor or resistance wire or strip is to be wound. These clamping jaws 95 and 96, the former of which is pivoted at its rear end to the jaw 96, may be held in. clamping position against the action of spring 97 by means of a clamping screw 98 carried by a bracket 99 which is secured to the lower clamping jaw 95.

The clamping jaw 95 may be formed integrally with or otherwise suitably attached to a cross head 100 which is adapted to be moved transverse to the direction of travel of the pulling stock. This cross head 100 moves between guide rails 101 and 102 suitably secured to the front face of the upright 86. The cross head 100 may be locked in adjusted position by means of a clamping screw 103.

v The pulling stock carries a pointer 1.0-1 vv'hich'moves over a scale 105 provided. on the cover strip 80. er and scale the operator of the winding may readily determine when the proper amount of the resistor has been wound upon the insulating core. The pointer and scale are also very useful for indicating to the operator when to shift the pitch adjusted to change from one to the other of the preset pitches,

hen winding the resistor upon curved insulating cores. and in order that the resistor may be wound evenly thereon. it. is desirable that the curved insulating core be moved through the winding head along a line approximating the axis of curvature of the insulating core. This may be accom- -plished b v causing the cross head 100 and the clamping jaws 95 and 96 to move transverse to the line of travel of the pulling stock while the pulling stock is moving along said line of travel.

A bracket 105 therefore may be suitably secured to the track rail 79 by means of bolts or screws 106. A removable adjustable cam 107 may be maintained by the arms of the bracket 105 in spaced relation to the pulling stock and in approximately the same horizontal plane with a roller 108 on one end of a splined shaft 109 carried by the cross head n' eans the p ,roller 103engaging the cam 107.

circular opening in which is supported a,

100. The particular form of the cam 107 employed depends upon the curvature of the insulating core upon which the resistor is to be wound.

Whensetting the winding machine for winding the resistor upon curved insulating cores. the pulling stock is moved into the position shown in Figs. land 2. The handle 04 may then be-moved to the right or left to permit the half nut 87 to mesh with the feed screw 26'. The splinedshaft 109 may be moved into a position with the The splined shaft 109 may then be locked to the cross head 100 by means; of" the clamping screw 110.' The clamping screw; 103 is loosened to unlock the crosshead'100.

/ During the operation of winding the resistor upon curved insulating cores or strips and as the pulling stock is moved to the left the roller 108 moves along the cam 107. The crosshead 100 with the associated clamping jaws 95 and 96 is therefore gradually moved transverse to the lineof'travel of the pulling stock. This transverse movement is against the action of a spring 111 one end of which is secured to a pin 1 12-' carried by the guide rail 101, and the other end of which is securedtoa pin 113 carried by the cross head 100FThis spring 111 maintains the rllei'l:1.08':against thecam 107-. .7

The winding head comprises, in general, an adjustable guide for guiding the insulating core therethrough, a spool for holding;

a supply of the resistor and apparatus for guiding the resistor from the spool and for applying the resistor to the insulating core: The assembly off'the winding head is shown in Figs. 1 and 2." Figs. to 12 inclusive show the details of thew inding head.

The winding head, part of which is stationary and part rotatable is supported by a bracket 114 mounted upon and'suitably secured to the-bed plate by,means of bolts The bracket 114 is provided with a hollow stationary bearing member 116.

This bearing member 116 islooked to the bracket 114 by means of. akey 117 and a nut 11s. 3

uThe rotatable parts of the winding head are driven by a gear 119 which' revolves on the bearing member 116. This gear 119 is driven from gear 23 on the drive shaft 17 through an idler tively control the winding'operation may be formed integrally with. the gear 119 or otherwise suitably secured thereto as by bolts A removable spool 124 for sister is mounted upon the hub 125 of the gear 119. To permit the spool 124 to revolve freely it rests upon rollers 126 and v gear .120- mounted on a stud 121 secured to the bracket 114. A handwheel 122 by which the operator may posi holding the reagainst rollers, 127 supported by the hub 125.

The gear hub 125 and the spool 124 are" held in proper position on the bearing mem her 116 by upper and lower disk parts 128 and 129 resting in-a groove 130 in the bearing member 116 and suitably detachably secured thereto by thumb screws 131. W

The speed ofthe spool 124 may be controlled by an adjustable brake mounted on the lower disk 129. This brake comprises a spring 132 of suitable material carried by the inner end of apusher rod 133. pusher rod 133 extends through a. thumb screw 134 threaded into a boss 135 on the disk 129. The inner end of the thumb screw 134 engages the spring 132. By turning the thumb screw 134. the tension of the brake spring 132 may be adjusted VVhen-proper adjustment of the brake spring 132 has been This secured the thumb screw 1.34 may be locked the same. 7 v

' 'The adjustable plate 137 is provided with a boss'142 in'which an oscillating head 143 is *suit-ablysupp0rted and journalled by means of the ball bearings 144 and 145. A cover 146 protects the ball bearings from dirt dust,. etc; The oscillating head 143 is'jprovided with an opening in which a guideptube 147 for the resistor is locked by a pin- 1 48 entering a recess in one side thereof. This pin in adjusted position by a-clamping screw 140 r i provided with handle 141 for operating 148 is secured toaspring 149 attached to the oscillating head. A coil spring 150 surround-' ing the boss 142-and having its ends entering openings in the boss142and the vhead 143 centers the head 143, and normally main-. tains theguide tube. 147 in radial-alinement but permits oscillation thereof during the winding operation. The guide. tube- 147 as shown in Fig. 6, is provided with two recesses 147? and 1'47 located'180 apart and with either'of which the pin 148 may cooperate to maintain the guidetube in either of two positions with respect to the head 143.

Figures 8 to 12 showing the details of the mechanism for guiding the. insulating core through the'windinghead will now be described. The insulating core is drawn by the pulling stock 6' between two rollers 151 and 152 provided with flanges 15.1 and 152 against which the edges of the flat insulating coremay rest as it is being drawn between the rollers. The rollers 151 and 152. are positioned in openings provided in the respecand 155.

'large enough to clear the shaft and its associsuitable pins passing therethrough. The arms 153 and 154 at their rear ends are keyed to the respective shafts 155 and 156 and rotate therewith but arelongitudinally slidable thereon, so that the rollers may be adjusted to and from the center. The shafts 155 and 156 are journalled in opposite sides of a rectangular frame 157 seated in a rectangular opening in the bearing member 116. The rollers 151 and 152 are normally urged toward each other by two springs 158 and 159. One end of the spring 158 is seated in a recess in'the arm v154 and the other end in a recess in a rearwardly extending arm 160 formed integrally with or otherwise suitably secured to the angle plate 162. Similarly, one end of the spring 159 is seated in a recess in the arm 153 and the other end in a recess in a. rearwardly extending arm 161 formed intdgrallywith or otherwise suitably secured to the angle plate 163. I

' The arms 160 and 161 at their rear ends are forked, and openings are provided in the forks whereby the arms. may be supported by the respective rocking shafts 156 The openings in the folks are ated key, so that the arms 160and 161 are not affected by the rocking'mo'vement of the shafts 155 and 156. 1

When the arms 154 5115.169 21% assembled on the shaft 1 ,6, the huh- 154? of-the am 154 is positioned etween the forks of the arm 160,so that {the transverse. position of the arm 154 may be varied'by movement of the arm ;l,60.1 f SimilarlyQWlien'the arms 153 and 161 are assembled on the shaft-1155, the hub 153 ofthearm-153 is positioned between the forks of thearm 161, so? that the transverse position of ithe aim 153 may be varied by movementfoffthearm 1611 I The angle plates162 and 163 are seated at their upper end in a slot. 166 and at their lower end in a slot 167, the slots being provided in. the front face of the bearing memher 116. Retaining plates 168 and 169 attached to the front face of theretaining plates are provided for the upper and lower ends of the angle plates 162 and 163. The angle plates 162 and 163 are thus definitely positioned whereby the rearwardly extending arms thereof are firmly supported.

In order that the rollers 151 and 152 may be moved to and from the center to accommodate different widths of insulating core, the angle plates 162 and 163 and associated arms are arranged to be, moved transversely to the bearing member 116. To this end, right and left hand screws 17 0 and 171 positioned in transverse openings in the bearing member 116 have threaded engagement with the respective arms 160 and 161. The two screws 17 0 arid 171 may be suitably connected, so that they may be operated simultaneously to cause the simultaneous movement of the angle plates and associated arms and consequently the simultaneous movement of the rollers 151 and 152 to or from the center.

In order that the insulating core may be held firmly'and in order to protect the edges thereof while the resistor is being wound thereon, the insulating. core after leaving the rollers 151 and 152 is drawn between two angle strips 172 and 173. The angle strip 172 is attached to a vertical extension of the arm 154 and the angle strip 173 to a vertical extension of the arm 153.

As previously explained, the springs 158 and 159 urge the arms 153' and 154ot0ward each other, so that the insulatin core, as it is being drawn through the win ing head, is firml engaged by the rollers 151 and 152 and y the strips 172 and 173. While the arms 153 and 154 are keyed to the rocker shafts 155 and 156, there is sufficient play to prevent interfering with the action of thesprings 158 and 159.

Before starting the winding operation, it is desirable that the insulating strip or core be properiy positioned in the core guiding mechanism ofthe winding head. In order that the arms 153 and 154 and parts carried thereby may be forced apart against the action of the s rings 158 and 159, a pair of levers 174 and 175 are provided. The lever 174 is keyed and locked to the rocker shaft 156 and the lever 175 to the rocker shaft 155. The free ends of the levers 17 4 and 175 rest upon the inner surface of a cam ring 176 which is seated in a circular openin within the hollow bearing member 116. T e inner end of a funnel shaped ring 177 is attached to. the cam ring 17 6, so that by rocking the ring 177 about its axis by means of the protecting handles 178, the cam 17 6 causes the levers 174 and 175 to rock the shafts 155 and 156. The rollers 151 and 152 and the angle strips 172 and 173 are thus separated to permit the positioning of the insulating ring 177 may be maintained in position by screws 179 passing through slots in the ring 177 and having engagement with the'be ring member 116. The screws 179 and cooperating slots also serve to limit .the oscillatory movement of the two rings.

By providing the funnel shaped opening in the bearing member 116, the core guiding mechanism is readily accessible from the rear. Consequently, it is possible to position in the winding head, very short lengths of insulating cores which are required in some classes of electrically heated apparatus.

The winding head as constructed is a unit which. maybe readily removed from the bracket 114 after first removing .the gear 120 and'the nut 118. it

, By taking out the thumb screws 131, the disks 128 and 129 may be-readily removed from the winding head. The spool 124, if empty, may then befremoved'and replaced by one containing a supply of resistor.

In order that the resistor 180 may properly guided from the spool 124 i'nto the, guide tube147, the resistor 180 first passes.

between'a pair of flanged'rollers 181', then betweena pair of flanged rollers .182 and finally over'Ia flanged roller 183 directly into the opening through the guide tube 147.

The pair of guide rollers 181 are carried 'by an arm 184 supported from a bracket 185.

The bracket 185 is formed integrally with or is otherwisesuitably attached to the disk 128 and extends radially therefrom.

The pair of guide rollers 182 are carried by an arm 186" adjustablysecured tofthe disk 128i'and a bracket 187 byv means of screws'or bolts 188 and 189. Thebracket 187 is secured to and supportedby the disk 1.28 at :the top of theguide rails'13 8-and 139. The guide roller 183 issupported on' a pin 1% fastened in the bracket 187.

A protecting cover 191'is provided for all moving parts of the winding head except thehandwheel 122 which left exposed so that it is readily accessible to the operator for positively controlling the winding of the resistoron the insulating core The cover 191 is made of two parts, the upper of which I is hinged to thevlower so that it may be 40- ,wound' thereon -may be drawn from the winding head by'the pulling stock.

:easily opened. I The front face of the core is 'provided'with a central opening through whlch the insulating core with the resistor The resistor 18G enters the opening in the guide tube'147 at the dead center thereof so that the oscillatory movement of the guide tube du'ring the winding. operation ing core and has an edgethereof-in alinement with one edge of the (insulating core, while the other-angle strip is similarly p0- sitioned below the insulating corebut at the other edge thereof.

The resistor 180' passes directlyfrom the ilowerendof'the guide tube 147 onto the angle strips 172 and 17 3 and the insulating core .positioned therebetween. I strips 172 and 1173 therefore protect the edges of the insulating core during the winding operation, and eliminate or greatly reduce the breaking of the insulating core at Since the tube 147 is'radially adjustable, the, guide These angle its edges. When it is understood that the insulating core usually" is a flat strip of 'mica, the importance of protecting theedges' thereof will be appreciated. Furthermore,

during the winding operation, the guide tube 147 initsoscillations follows very close-f ly .the outer edges of the insulatingfcore,

thereby maintaining a minimum distance I between the. outlet end of the guide tube 147 and the insulating core, and windin the resistor thereon evenly: and with uni orm" tension. a

plate 137 carrying" the guide tube 147 may be positioned so thatthe very best possible results may be obtained with insulating cores of different widths. I 7/ The thumb screw 13,4'o :t .thespring brake may betightened up sufficiently to lock the spool 124 to the gear hubf125, 'when,- if

desired, the spool maybe refilled with resistance -Wire without removing the spool from the winding head. .What is claimed is:} i, a i

1. In a winding machine, the combination with a rotatable member and a support for material to be wound carried by said memher, of a core memberotangular cross section about which said material is adapted to I be wound, guiding means for said material. including,- means enabling shifting of the direction 01: travel of said material out of radial alinement with respect to the center of said core member to thereby maintain a minimum distance between the outlet end of said guiding means a'nd the surface of said c'ore.

2 A winding fnachinefcomprising a ro tatable head, a rotatable support for the material to be wound carried by the head, and means for guiding the. material from the support to a core on which it to'be wound,-said means including a .radially.adjustable member carried by thehea'd panda guide pivotally mounted on said member.'

3. In a winding machine, the 'ciombinfation with a rotatable head member anda support for; material tobe wound carried by'said member, of guiding means for "the material including means enabling shifting of the direction of travel of the material being wound in a manner to minimize variations in the distance between said guiding means and the material immediately after winding thereof.

4. In a winding machine, the combination with a rotatable headmember and a support for material to be wound carried by said member, of guiding means for the material including 'means for. maintaining a relatively large angle between the material immediately before winding and the ma .terial immediately after winding under conditions of variation inradius of the wound y, of. material.

direction of trave 5. A machine for winding a conductor on an insulating core, having in combinawhich the material is to be wound, and

means for guiding the material from the rotatable member to the core pivotally mounted on the rotatable member.

7. In a winding machine, the combination with a rotatable member and a support for material to be wound carried by said member, of winding means for the material including means for maintaining substantially a constant angle between the material immediately before winding and the material immediately after winding, during shifting of the. region of junction between such wound and unwound material with reference to the axis of rotation of said head member.

8. In a winding machine, the combination with a rotatable head member and a support for material to be wound carried by said member, of guiding means for the material including meansto be actuated by the material bein wound for varying the Iof the latter in response to shifting oi the re ion of junction between the wound and t e unwound material with reference to the axis of rotation of said head member, to thereby maintain substantially a constant and relatively obtuse angle between the material immediately before winding and the material immediately after winding. I

9. In a winding head for a winding machine having in combination a stationary member with an opening therein, a rotatable supporting member for the material to be wound, means for moving through the opening a core on which the material is to be wound, adjustable core guiding and positioning means located within the opening, and means for guiding the material from the rotatable supporting member to the core pivotally supported by the rotatable member.

10. In a winding head for a winding ma chine having in combination a statlonary member with an opening therein, a rotatable -member supported by the stationary member, a su portin spool for the materialto be woun carrie by the rotatable member, guiding and positioning means for a core on which the material is to be wound supported within the opening, and means for guiding the material from the spool to'the core pivotally supported by the rotatable member.

11. In a winding head for a winding machine, in combination, a stationary member having an opening therein, a rotatable supporting member for the material to be wound, guiding rollers for a core on which the material is to be wound supported within'the opening, and means for guiding the material from the rotatable member to the core pivotally supported by the rotatable member.

12. A winding head for a winding machine comprising a stationary member with an opening therein, a rotatable supporting member adapted for the material to be wound mounted on the stationary member, adjustable arms supported within the open ing, guide rollers for a core on which the material is to be wound carried by the arms, and means for guiding the material from the rotatable member to the core.

13. A Winding head for applying material to a core comprising a stationary member having an opening therein, a rotatable material supporting member mounted on the stationary member, core guiding and positioning members located within the opening, a pair of core protecting fingers-supported by and projecting from the guid; ing and positioning members, and means for guiding the material from the rotatable supporting member over the protecting fingers and onto the core,- said guiding means being pivotally supported by the rotatable member.

14:. In a winding machine for applying material to a core, the combination of 'a rotatable material supporting head gore,

guiding and positionlng members, coreprotecting fingers supported by said members, and means for guiding the material from the rotatable head over .the protecting fingers and onto the core.

15. In a winding machine, the combination of a'rotatable head adapted to carry the material to be wound, guiding and posi-- tioning members for a core on which the material is to be wound, core protecting fingers supported by said members, and means forguiding the material from the rotatable head over the protecting fingers and onto the core and including a guide pivotally supported by the rotatable head.

16. In a winding machine for applying material to a core, the combination of a rotatablematerial supporting head having an opening through which the core is adapted I to extend, a pair of brackets extending into the opening, rollers rotatably mounted in the brackets, core protecting fingers fastened to the brackets and co-operating with the rollers to position and guide the core, and means for guiding the material from the rotatable head over the protecting fin gers and onto the core.

17, In a winding machine, the combina tion of a rotatable head adapted to carry the material to be Wound and having an opening through which a core is adaptedto extend, a pair of adjustable arms, rollers for guiding and positioning the core carried by the arms, core protecting'fingers carried by the arms, and means for guiding the material from the rotatable head over. the protectingfingers and onto the'core.

1-8. In a Winding machine for applying material to a core, thecombinatioii of a ro-g tatable material supporting head having an opening therein, means'for' feeding the core through the'opening, means for guidingthe material from the rotatable head onto the 'core and including a guide finger pivotally mounted on the head to swing, in a plane at an angle to the axis of rotation-of the head,

means for determining the pitch at which the material is wound on-the core, and means t for changing the of the machine. i 19. In a Winding machine, the combine pitchduring the operation tion with a winding head having a rotative member to supply and apply the winding material to and about a non-rotative-core,

of means for so moving the core that the a rate of suchmovement is a measure of the winding pitch and means providing ing the speed changes so preselected to Wading operation.

22;.In a machine for winding materialfor thereafter causing the machine to wind at the pitch so preselected. 7

21. In Ia'maehine for winding material on a core, 'the'combination of a rotatable head adapted to carry and apply the material to the core, means for moving the core in a plane transverse to the plane of rotation of the head and at a predetermined rate, said means including. a driving disk and a driven disk whose periphery is in functional engagement with the face of the driving l i disk, and means for varying the position of the driven disk on the driving disk to change the rate of movement of the core during the upona core, the combination with a rotative I I head member adapted to carry the material,

a driving shaft, means for driving said head. member from said shaft and apulling stock for drawing the core through anopening-in said head member at a rate'which is a measure of the Winding pitch of an adjustable] driving connection between said driving for presetting adesired drive ratio during operation of the drive. at a different ratio.

23. In a machine for winding a conductor 'm r shaft and" said pulling'stock and control means'for saiddriving connection providing: T i

on an insulating core, a rotatable head hav= ingan opening through which the insulating core passes, a support for the conductor carried by the head, a driving shaft, means for driving the head from the shaft, a pair of clamping jaws for gripping the insulating core, a guide for the clamping jaws,

means driven by the shaft and cooperating with the guide to move the clamping jaws in a plane transverse to the plane of rotationof the head, and means operable during the winding operation for changing the rate of movement of the clamping jaws so as to change the winding pitch.

In witness whereof, I have hereunto subscribed my name.

. EDWIN N. LlGHTFOOT.

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