US2158038A - Wire drawing - Google Patents

Description

May 9, 1939.

D. s. STARRlNG ET AL ,158,038

WIRE DRAWING Filed Aug. 1, 1936 :5 Sheets-Sheet i May 9, 1939. D. s. STARRING ET AL WIRE DRAWING Filed Aug. 1, 1936 3 Sheets-Sheet 2 Jul". 67 illlllll lllllllll ll Illlllllllll lh HIIIIIHHIII FY-II" llllllflllll ill mm; \\\\u! lllllllllllllllll INVENTORS par/d JJzarr/ny d' 5 BY am A RNEY May 9, 1939. I D. s. STARRING ET AL 2,158,938

WIRE DRAWING Filed Aug. 1, 1936 3 Sheets-Sheet 5 F 9 94 ENVENTOR ATTO Y Patented May 9, 1939 A UNITED STATES PATENT OFFICE WIRE DRAWING Application August 1, 1936, Serial No. 93,870

6Clalms.

This invention relates to wire drawing. and more particularly to handling of the wire as it leaves the last die of the wire-drawing machine.

In wire drawing as heretofore practiced the wire was brought into the machine and reduced by a plurality of die and capstan groups, being drawn through the last die by a capstan before being finally wound on a frictionally driven spool for use. A capstan as used in this sense is a rotatable element about which the wire is wound more than a partial turn for giving the wire a pull suilicient to draw it through the preceding die, and on which element the wire continually slips an extent.

In this prior arrangement there occurred, in addition to the slippage of the wire over the capstans ahead of the last di e, slippage of the wire over the capstan following said die, as well as slippage in the drive to'the spool.

As a result the speed of the wire through the machine, governing the quality of the wire as well as the quantity, was a variable, and uniformity of product at all times was dimcult to obtain.

Also in this prior art, the practice was to pass the wire, after it left the last capstan, first over a series of pulleys, and then over a. spool-traversing pulley, to the frictionally driven take-0E spool, and in so passing the wire from the last of said series of pulleys to the traversing pulley there was necessitated along stretch of wire to provide for the lateral movement of the wire required by the reciprocations of the spool-traversing pulley.

This was further undesirable in that much space was required by the take ofl mechanism, as well as there being required a number of pulleys,

involving installation, maintenance, and other factors.

It is an object of the present invention to obviate the uncertainty in speed of wire existing in these prior machines, as just pointed out, together with the undesirable results there-attendant, by providing in a wire-drawing machine, a practical positively-driven wire pulling and take-ofl' mechanism which functions without 'wire slippage.

An embodiment of the invention which exemplifies this has a take-ofl mechanism wherein a collecting spool, upon which the drawn wire is wound, functions in the place of the usual capstan to draw the wire -through the last die of the machine, and additionally functions to thus draw the wire in a positive manner and with no i slippage.

This take-off mechanism is made practical by the use of a spool. having a large core relative to the amount of wire the spool is to carry so that the difference in the diameter of the core and the outside layer of wire of a fully wound spool is sufliciently slight that the speed of the wire through the machine dies is always kept within practicable limits, 0! course, the wire is drawn at a slightly faster rate as the spool becomes fully wound but the maximum speed is not excessive, nor is the speed of the wire when first started extremely slow.

It is another object of the present invention to provide a positive take-ofl mechanism, in wire drawing, wherein the speed of the wire, and consequently the slip of the wire on the capstans may be held substantially constant, and wherein this constancy may be maintained over a range of difierent initial wire speeds.

'This object is attained in one embodiment by providing a separate motor drive for the take-oi! spool, and in another embodiment by providing a separate drive and an automatic control therefor responding to the thickness of the layers of wire accummulating on the collecting spool.

This latter organization includes feelers engaging the wire on the spool, which feelers actuate a rheostat in turn controlling the speed of the motor driving the spool.

It is another object of the present invention to provide an improved wire-handling means for spooling the wire coming from the machine whereby the long stretches of wire which were necessary in prior machines are now avoided, and whereby fewer pulleys with their accompanying undesirable bending and mar-ring of the finish of the wire, are required.

In one illustrated embodiment of the invention this object is attained by placing the axis of the spool parallel to the direction of the wire, and having only a single pulley traverse the spool.

Inanother illustrated embodiment the spool is made to move axially as well as rotatively, so as to traverse a pulley on a fixed axis.

In still another embodiment the axis of the spool is disposed at substantially right angles to the wire and the spool is made to move axially as well as rotatively, the spool traversing a stumng box in the casing of the machine through which the wire passes from the last die.

Because of the simplicity of the improved takeofl mechanism of the present invention, the wiredrawing machine can be initially strung with wire much quicker than was heretofore possible.

appear.

Other features and advantages will hereinafter machine according to the invention; the machine includes an improved type of spool traversed by a pulley, and the disposition of the parts are such that the wire can be drawn through the last die of the machine without a capstan following said die.

Fig. 2 is a side elevation of the machine of Fig. 1, with the casing face-plate removed.

Fig. 3 is a fragmentary top plan view of a machine showing another embodiment, wherein the wire is drawn from the last'die by a spooling mechanism characterized by the spool being given an axial traversing movement past a stationary pulley.

Fig. 4, is a top plan view of a machine of another embodiment, wherein the wire is drawn from the last die of the machine directly onto a spool given an axial-traversing movement past said die.

Fig. 5 is a side elevation of the machine of Fig.

4, with part of the frame broken away.

Fig. 6 shows one type of improved spool having a relatively large core, as used in the present invention.

Fig. 7 shows the spool of Fig. 6 fully wound with wire, ready for use.

Fig. 8 is a fragmentary top plan of a machine exemplifying another embodiment, wherein a separate motor drive is employed with the take oil or collecting spool.

Fig. 9 is a top plan view of a machine having a separate motor drive for the collecting spool, and having an automatic control for the motor. Fig. 10 is a fragmentary side elevation on line ill-l0 showing the automatic control for the motor which drives the spool.

Referring first to Figures 1 and 2, a wiredrawing machine is shown having a frame ll 1 with a top or table II and sides I2. Attached to the top of the table II is a casing II which encloses and supports the dies and capstans used in drawing a wire ll. The casing I3 is shaped like a rectangular box, and has a front opening which is closed over by a plate I! secured by screws to a flange It provided around the edge of the casing.

The casing 13 has on its back wall a plurality of inwardly-extending bosses I! in which Journal shafts l8 carrying capstans I9, I90, I 9b, lie, 20, a, 20b, and 200. The shafts I. extend through the back of the casing l3 and have bevel gears 2| fixed thereon which engage bevel gears 22 fixed on shafts 23 and 24 journaled'in arms 2! offset from casing It. The shafts 23 and 24 carry bevel gears 26 which engage bevel gears 21 carried at opposite ends of a shaft 28 Journaled in bearing brackets 29 supported on the table II.- Thus, all of the capstans are geared together in such manner that the capstans I 0, Ila, I 917, and We turn in the same direction, as do the capstans 20, 20a, 20b, and 200, the direction of turning of the first group of capstans being opposite to that of the latter group.

A die-carrying member 30 of T-shaped cross section is attached to the back wall of the casing l3 so as to be disposed vertically therein, and dies II are carried by said member for drawing the wire it so that it is made smaller as it passes through each succeeding die.

The shaft 23 extends through and below the table II and carries at its lower end a bevel gear 32 which engages a bevel gear 33 fixed on a driving shaft 34 journaled in a depending arm 35 and boss 36. Power is applied to the machine for rotating the capstans and operating the spooling mechanism by means of the shaft 3 4 driven by an electric motor (not shown).

The wire it enters the casing i3 at 31, passes over the capstan 20, through the first die 3i where its diameter is reduced, over the capstan l9, through the second die 3i where its diameter is again reduced, and so on over the other capstans and through the other dies, until the wire passes over the last capstan I90 and through the last die 3| and out through a stumng box 31a to the spooling mechanism.

Heretofore it has been the practice to employ a final capstan to draw the wire through the last die 3! before it is finally brought out of the casing and led by pulleys to the reeling-on spool. By the present invention this last capstan immediately following the final die has been eliminated through .the use of improved spooling and pulling means, and asa consequence, the drawing of the wire is now accomplished in a positive manner, and there results a substantial increase in production. Again, spooling mechanisms in prior machines have required longv stretches of wire and a plurality of pulleys between the final capstan and the spool. By the present invention, there has also been obviated the necessity for these long stretches of wire and the pulleys heretofore used, resulting in additional advantages.

In the illustrated embodiments of the invention these improvements have been accomplished by the aid of an improved spool having a relatively large core such that, when the spool is fully wound with wire, the outside diameter of the winding will not be excessively large with respect to the diameter of the core, and by the provision of an improved associated driving mechanism.

We have found that by using a spool of relatively large core diameter, as shown in Fig. 6, such that when the spool is fully woimd with wire, as in Fig. 7, there will be relatively little increase in the outside diameter of the spool, it is possible to draw the wire through the last die by means of the spool, without the use of a capstan beyond said die.

The spool shown in Figs. 6 and 7 includes a substantial cylindrical core having flanges at each end for preventing wire wound on the spool from slipping off the ends. It will-be noted that the diameter of the outer layer of wire, although 55 greater than the diameter of the core, is not materially so. This is an important point, in that' it provides for a wire speed through the wiredrawing machine which, at the start of winding a spool, is not extremely slow, and which, as the m; spool becomes fully wound, is not excessively fast for the purposes of wire drawing.

Reverting to Figs. 1 and 2 to understand the spooling mechanism there shown, wherein the spool has a relatively large core as explained just above, said spooling mechanism includes a spool the axis of which is parallel to the direction of travel of the wire as the latter leaves the machine, and a traversing pulley having its axis perpendicular to the axis of the spool. With such spool and pulley the wire can be guided to the spool to be reeled thereon in even layers after being drawn directly from the last die without intermediate capstan and pulleys, and without the necessity for long and unwieldy stretches of wire. The wire is handled by only one traversing pulley before being finally wound on the spool, and therefore there has been eliminated a great deal of bending of the wire and marring of the finish thereof such as occurred heretofore when the wire passed over a capstan and a number of pulleys before being finally reeled on the spool. The wire drawn from the die casing, in accordance with the present invention, is thus free from irregularities which accompany bending and handling thereof, and the wire is further protected by being wound on a spool of large core diameter so that when it is unwound for use it will be free of small sharp bends which are caused by irregularities of the layers in spools of small core diameter.

It should be noted that in wire drawing as heretofore practiced, wherein a capstan was employed between the spool and the last die to draw the wire through the latter, there was of necessity a certain amount of slippage of the Wire over the capstan, and this slippage was undesirable in that it not only marred the finish of the wire but altered the circular cross-section which had been imparted to the wire by the last die. This difficulty has been obviated by the present invention wherein no capstan nor other device over which the wire must slide or slip is interposed between the last die and the spool.

In Figs. 1 and 2 the spool is shown at 38, carried on a shaft 39 journaled in bearing brackets 48 and M attached to the table H. One end of the shaft 39 carries a bevel gear 42 which engages with the bevel gear 26 on the shaft 24 to receive power therefrom. The gear 52 is loosely carried on the shaft 39 and drives said shaft through a clutch mechanism including a friction disk 33, a clutch plate 44 which is keyed to the shaft 39 for sliding thereon, a collar fastened to the shaft, and a helical spring 66 disposed between the plate 44 and said collar. The shaft 39 has a flange 46 carrying a pin 41 which engages an aperture in the end of the spool 38 to prevent turning of said spool relatively to the shaft.

The bearing bracket d! is pivotally mounted at 33 on the table ii, and said bracket pivotally carries, on a pin at its lower and outer end, a looking or wedge dog 43 which when set to the position shown locks the bracket iii in vertical position against the spool 33. A bushing St is carried in the bracket 3i and serves as a bearing for the shaft 39, and when it is desired to remove the spool 33 from the machine the bushing 59 is slipped out of the bracket '63, and the latter is swung to the right and downwardly after releasing the dog 33.

The traversing pulley is shown at 5i, being carried by a stub shaft 52 which is journaled in a boss 33 on a slide 56. This slide is movable back and forth along a slot in the table ii, to

carry the pulley 5i so that it traverses the entire length of the spool 38.

In order to impart a reciprocating motion to the slide 5 1 and pulley 5i, there is provided a criss-cross screw 53 engaged by a follower or shoe 55 i carried by the slide. The criss-cross screw 56 is fast on a shaft 5? journaled iii bearings 53 and 58a, said shaft having attached to it a worm gear 53 meshing with a worm 68 fixed on the lower end of the shaft 26, and being driven thereby. Since both the spool 33 and the criss-cross screw 56 are driven from the shaft 25, the pulley 5! is caused to traverse the spool 33 at the same time that this latter is made to turn, and at the same time that the capstans for drawing the wire are turned, so that the wire M to be reduced is drawn through the various dies and over the various capstans, and wound on the spool 38 in even layers, the spool 33 drawing the wire through the last die 3i.

There is thus provided by the present invention, as exemplified in the construction just described, an improved spooling mechanism for winding wire on a spool in smooth and even layers, and employing but one pulley disposed between the spool and the last die of the wire-drawing machine for guiding the wire which has been drawn through the die, and which mechanism is adapted to draw the wire through the last die of the machine without slippage, and without the use of a capstan after said die.

With the wire is disposed about the capstans and through the dies and over the pulley 5| to the spool 33, and only when the machine is started up a certain amount of slippage occurs between the spool 38 and the gear 42, as provided for by the friction clutch between said gear and the shaft 33. After the machine has started, this slippage ceases, the clutch being so adjusted, and

wire is drawn from the machine through the last die 3i and over the pulley 5| by the spool 38. It will be noted that each of the capstans l9, lea, I91), I90, 20, 29a, 20b, and 200 is, as conventional, of a different diameter so as to compensate for the increase in the length of the wire attendant to the reduction in the size thereof resulting from its being drawn through the dies.

Referring to the embodiment of the invention shown in Fig. 3 the collecting spool 38a is disposed with its axis parallel to the wire Ma. In this form of the invention, however, the spool is given an axial traversing movement relative to a pulley dia supported on the table Ha for rotation about a fixed axis.

The spool 33a is carried by a sleeve Bl which is keyed to a shaft 39a and is slidable thereon, the shaft 33a being driven by a bevel gear 42a through a frictional clutch device similar to that of Fig. 1.

The sleeve ti is journaled in an arm Mia and in a bracket did, both carried by a slide 62, the bracket ii la being pivotally mounted on the slide, and the latter being slidable along a slot 33 in the table Ha. A bushing 50a in the bracket did serves as a bearing for the sleeve ti so that when it is desired to remove the spool 38a after it has been fully wound with Wire, the bushing We can he slipped out of the bracket Ma, and the latter swung to the right and downwardly by releasing a looking or wedge dog (not shown) similar to the dog iii! of Fig. 2. The slide 62 has an extension fiio which carries a shoe 32' engaging a criss-cross screw 53a attached to a shaft tin which is driven by a worm gear 59a meshin with. a worm carried on the shaft 23a.

The wire is thus drawn through the last die in the machine by means of the spool 33a traversing the feed pulley bid, and without the use of a capstan, and no slipping or sliding of the wire occurs after it leaves the last die and before it is wound on the spool.

Referring to the embodiment of the invention shown in Figs. 4 and 5 the spool marked 31% is moved axially back and forth, but with its axis substantially at right angles to the line of travel of a wire Nib as said wire leaves the machine after being reduced by being drawn through the various dies therein. The spool 38b is fixed to a sleeve bib by a pin Mb carried by the latter; this sleeve being journaled at 40b on a slide 62b movable along a alot 63b in the table Ilb.

wedge dog shaft 38b passes through the sleeve Gib, said shaft at one end being journaled in a bushing 58b and near its other end being journaled at b on the table lib. The sleeve Gib is keyed to the shaft 39b and is slidable thereon, and said 'shaft is driven from a gear 65 through a friction clutch 86, the gear 65 meshing with a. gear 81 driven, by way of bevel gears 68, 69, I0, and II, from the shaft 24b.

The bushing 50b is screwed into a bracket-arm lib which is pivoted at 64 on the slide 62b. The bracket-arm lib carries a pivoted looking or tab, the lower end of which abuts the top of the slide 62b to lock the bracket in upright position during spool winding. The bushing 55b carried in the bracket II b is unscrewed and removed, after turning the dog 491), when it is desired to swing the bracket lib to the right and downwardly to remove the spool 38b.

The slide 52b has an extension carrying a follower or shoe 62b which engages a criss-cross screw 58b rotated by a worm gear 12 driven by a worm 13 in turn driven by bevel gears 14 and 15 from the shaft 24b. Thus the spool 38b is axially moved back and forth while it is being rotated for the purpose of spooling.

It should be noted that the spool is thus axially moved along a line perpendicular to a stretch of the wire' Mb coming from the casing lib housing the dies and capstans of the machine;

this casing is provided with a final forming and polishing die I6 through which the wire Mb is drawn'as it emerges from the casing directly to assume such straight stretch. According to this arrangement there are no pulleys whatever over which the wire must pass after being drawn through the last die 16 and before it is wound on the spool 38b. As a result, no twists or bends are 'suifered by the wire after the last drawing operation, nor is the wire scraped or otherwise injured or deformed after emerging from said die.

The die I8 may be employed to draw the wire b to its final exact size and may be further employed to impart a finish and polish to said wire, all directly-before the spooling of the wire in preparation for use, and therefore an extremely uniform product of exceptionally high quality is produced, ready to be wound on the spool.

Also, the wire may be quickly and accurately drawn to the precise final predetermined cross- 'section, with a high ultimate polish and most economically, yet so as to be especially adapted for precision work or for subsequent enameling and other insulating processes. It is repeated that no capstan is required after the wire is drawn through the last die, nor are any pulleys required, nor is there a longstretch of wire which might be unwieldy and troublesome.

In addition, wire which is thus reeled will be wound on the spool in even layers, and withnegligible drag or slack, despite the fact that the speed of the wire traveling through the dies of the machine will be given an increment each time a new layer is started on the spool 38a. Each such increase is of small value; and it has been found that the total increase, from the first layer wound on the spool, to the final such layer, is well within the practicable limits for wire drawing.

Another embodiment of thepresent invention, whereinthe speed of the wire through the machine is kept constant, and is controllable, is

shown in Fig. 8. The machine illustrated in this mum is similar in most respects to that of Fig. 4,

an important difference being that the wirecollecting spool and mechanism for reciprocating said spool are both powered by one electric motor separate from the motor stans of the machine.

As shown, the wire o emerges from the easdriving the caping iii of the machine, and passes directly to the spool 38c carried by the reciprocating slide 620.

The shaft 390 associated with the slide 620 passlower extremity of said shaft carries a wormwhich engages a worm gear 8i fixed to a shaft 82 in turn carrying the miss-cross screw 56c.'

The slide 620 has an extension 83 having a shoe engaging the criss-cross screw 56c, and thus said slide is reciprocated simultaneously with turning of the spool 38a, the entire organization being driven by the motor 11.

Energy for the motor 11 is obtained from the main current supply wires 84 through a suitable switch 85, said switch also controlling the circuit, designated by the wires 88, leading to the motor 81 which drives the capstans of the machine through a sprocket and chain drive 88 as shown.

Thus, closing the switch 85 will cau e simultaneous energization of both the electric motors of the machine.

The motor 11 preferably has a weaker starting torque than the motor 81 driving the capstans of the machine, so that the wire passing through the machine will not be broken when the machine is first started.

For the purpose of regulating the speed of the motor 11, there is provided a suitable control, shown in Fig. 8 as a rheostat 89 in series with the motor circuit. 4

Operation of the embodiment of Fig. 8 is as follows: After the wire c has been passed through the various dies of the machine and over the capstans it is brought out of the casing i3 and fastened to the spool 38c, and the slack is taken up. The switch 85 is then closed, whereupon the motor 11 will start simultaneously with the motor 81 driving the capstans of the machine. However, since the latter motor has a more powerful starting torque than the motor 1! driving the spool 38c, the wire will be quickly fed to the spool.

The motor 11, however, will take up the slack in I the wire c as quickly as it is fed, but since it has a weaker starting to rque it will not at any time pull the wire suificiently to break same. Therefore, the machine will start upon closing of the switch 85 without further attention on the part of the operator.

During the starting, the slip of the wire on the capstans ofthe machine, due to the weaker starting torque of the motor 11, will be greater than the slip existing after the machine has reached normal speed. Under conditions the motor 11 will cause the wire I40 to be drawn through the machine at a substantially constant speed, this depending on the characteristics of the motor and the friction of the normal operating Wound the diameter will increase so that the wire-travel per revolution of the spoolwill become greater. However, this greater diameter will also result in a greater load on the motor H, which will cause a corresponding compensating diminution of speed of said motor, the net result being that the wire-speed through the machine will remain susbtantially constant.

If it is desired to have the wire pass through the machine at a faster or slower rate, the rheostat 39 is varied.

Figs. 9 and 10 show another embodiment of the invention, wherein a separate motor drive is employed for turning the collecting spool, and wherein an automatic speed control, responsive to the amount of wire on the spool, is employed to regulate the motor.

' The machine shown in these figures is similar in most respects to that shown in Fig, 1, having a single feed pulley reciprocative traveling before a spool whose axis is parallel to the direction of wire coming from the machine, but with the exceptions that the collecting spool is driven independently of the capstan mechanism, and is automatically controlled.

As shown, the spool 38d is driven by means of a sprocket drive from the motor l'ld carried by the table 89. The shaft carrying the spool 3M also carriesa bevel gear engaging a similar gear 9i carried on a vertical spindle 92, the lower extremity of which has a worm 93 engaging a worm gear 94 which drives the criss-cross screw 56d for reciprocating the feed pulley 5lb. Thus the spool 38d and its feed pulley are driven independently of the capstans of the machine.

For the purpose of automatically regulating the Speed of the motor l'ld, the circuit of said motor is provided with a speed control device in the form of a rheostat 95 which is actuated in response to the amount of wire on the spool 3511.

The rheostat 95 is carried by the table 99 of the machine, and is operated by a shaft 96 carrying a pair of feelers 9'! adapted to ride against the layers of wire on the spool, as shown. When the wire is first started at the beginning of a run, the spool 3342 will be empty and relatively little resistance will be included in the motor circuit. As the spool becomes more fully wound it will cause the feelers to move outwardly and increase the resistance in the motor circuit so as to efiect a reduction in the speed of said motor. Thus, should the motor lid be of the type whose speed is not reduced upon slight increase in load, which increase results from the increased diameter of the layers oi-wirepn the spool, the rheostat 95 will act to slow up, the motor so that said increased diameter of the wire layers will not cause a faster wire speed through the machine. Therefore there is provided, by the organization as just described, an automatically controlled take-0E mechanism which maintains a substantially steady wire speed at all times, regardless of the amount of wire on the collecting spool 38d.

For the purpose of changing the speed at which the wire is to he run through the machine, the feelers 9? are adjustably carried on the shaft 938, and said feelers may be rotatably shifted rela-= tively to the arm or the rheostat 95 by loosening the'set screws shown. Thus, the working range of the rheostat may be varied to obtain different motor speeds, as requirements dictate.

Variations and modifications may be made within the scope of this invention and portions of the improvements may be used withoutothers.

We claim:

1. In a wire-drawing machine, the combina tion of a plurality'of dies for reducing a wire passing therethrough; a plurality of capstans for drawing the wire through all but the last die; power means for driving the capstans; a spool upon which the wire is to be wound for future use, adapted to draw the wire through the last die; separate power means independent of the first-mentioned power means and having a weaker starting torque than the latter, for rotating the spool; and means for starting both power means simultaneously from a common source of energy.

2. In a wire-drawing machine, the combination of a plurality of dies for reducing a wire passing therethrough; a plurality or capstans for drawing the wire through all but the last die; power means for driving the capstans; a spool upon which the wire is to be wound for future use, adapted to draw the wire through thelast die; means, including power means independent of the first-mentioned power means and having a weaker starting torque than the latter, for rotating the spool; means'ior starting both power means simultaneously "from a common source of energy; and control means for governing the power means for rotating the spool, said control means controlling the speed of rotation of the spool in response to the amount of wire on the spool.

3. In a wire-drawing machine, the combination of a plurality of dies for reducing a wire passing therethrough; a plurality of capstans for drawing the wire through all but the. last die power means for driving the capstans; a spool upon which the wire is to be wound for future use, adapted to draw the wire through the last die; means, including power means independent of the first-mentioned powen -means and having a weaker starting torque than the latter, for rotating the spool; means for starting both power means simultaneously from a common source of energy; and control means, governing the power means for rotating the spool, for controlling the speed of said spool.

4. In a wiredrawing machine, the combination of a plurality of dies for reducing a wire passing therethrough; a plurality of capstans for drawing the wire through all but the last die; a spool upon which the wire is to he wound for future use, adapted to draw the wire through the last die; means for mounting the spool for turning movement, the axis of the spool being simultaneously parallel to the direction of emergence of the wire from the last a pulley for guiding the wire on the spool; means for reciprocating the pulley to traverse the spool in a path in alignment with the direction of emergence of the wire, for causing said wire to be wound on the spool in even layers; a friction clutch connected with the spool; and means for driving the spool through the clutch so that when the machine is being started the spool will slip an extent relatively to its driving means to prevent breaking or the .5. In a wire-drawing macmne, the combination of a plurality of dies for reducing a wire passing therettuouah; a plu y f capstans for drawing the wire through all but the last die; a spool upon which the wire is to he wound for future are, adapted to draw the wire through the last die; maansrotatabiy mounting the spool with its axis Substantially parallel to thedirection of emergence of the wire from the last die;

a traversing pulley for guiding the wire on the spool; and means for reciprocatively moving the pulley traversingly of the spool in a path parallel with the axis thereoi and simultaneously with the rotation thereof so that the wire is wound thereon in even layers, the path of movement of said pulley being in alignment with the path of emergence of the wire from the last die.

6. In a wire-drawing machine, the combination of a plurality of dies tor reducing a wire passing therethrough;'a plurality of capstans for drawing the wire through all but the last die; a spool upon which the wire is to be wound for future use, adapted to draw the wire through 5 the last die; means for mounting'the spool for turning movement, the axis of the spool being substantially parallel to the direction oi emergence of the wire from the last die; a traverse guide; means for reciprocatively moving the guide in a path coinciding with the direction of emergence of the wire from the last die, said guide causing the wire to be wound on the spool in even layers; a friction clutch connected with the spool; and means for driving the spool through the clutch so that when the machine is being started the spool will slip an extent relatively to its driving means to prevent breaking or the wire. 7

DAVID S. STARRING. GEORGE B. HORN.

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