US2226400A

US2226400A - Wire-drawing machine

Info

Publication number: US2226400A
Application number: US80973A
Authority: US
Inventors: Frederick W Gaines
Original assignee: Ajax Manufacturing Co
Current assignee: Ajax Manufacturing Co
Priority date: 1936-05-21
Filing date: 1936-05-21
Publication date: 1940-12-24
Anticipated expiration: 1957-12-24

Description

Dec. 24, 1940. I F. w. GAINES. so

' WIRE-DRAWING MACHINE Filed May 21, 1936 '3 Sheets-Sheet 1 I NVENT OR. fimEfi/c/r M 640%: 3

Jg/tle Mm 45%;

ATTORNEYS 2,22 6,400 5 Sheets-Sheet 2 I l I INVENTOR. fkzoffi/c/r M 640%: 3-

ATTORNEY Dec. 24, 1940. F. w. GAINES, so

WIRE-DRAWING MACHINE Filed May 21, 1936 Dec. 24, 1940. F. w. GAINES, an

WIRE-DRAWING MACHINE Filed llay 21, 1936 3 Sheets-Sheet 3 fawfiaam 4M ATTORNEYS Patented Dec. 24, 1940 UNITED STATES PATENT OFFICE WIRE -DBAWING MACHINE Application May 21, 1936, Serial No. 80,973

23 Claims.

This invention relates to an improved wiredrawing machine of the type adapted to operate as an attachment to a metal fabricating machine.

The present invention is an improvement over the wire-drawing machine disclosed in Patent No. 1,934,446, issued November 7, 1933.

An object of my invention is to provide an improved wire-drawing'machine, of the type mentioned, having novel inching mechanism for starting the wire stockor rod through the die.

Another object of the invention is to provide an improved wire-drawing apparatus, of the type referred'to, having a reciprocating wire drawing die and novel means for actuating the same. a

A further object of the invention is to provide an improved wire-drawing machine, of the type referred to,'having novel means for operating the inching mechanism from the same power means which operates the reciprocating die.

Still another object of my invention is to provide an improved wire-drawing machine, of the type referred to, having novel means for straightening the stock before it passes to the wire-drawing die.

improved mounting means for a wire-drawing die to facilitate access thereto for cleaning the drawing orifice or for replacing the die.

The invention may be further briefly summarized as consisting in certain novel combinations and arrangements of parts hereinafter described and particularly set out in the appended claims.

In the accompanying drawings- Fig. l is a side elevation of an improved wire- :;5 drawing machine embodying my invention;

Fig. 2 is a top plan view thereof;

Fig. 3 is an end elevation, with portions broken away, showing the end of the machine at which the'stock enters;

Fig. 4 is 'a transverse sectional view of the machine taken on line 4- -4 of Fig. 1;

Fig. 5 is a partial longitudinal sectional view through the die seat and powder box as indicated by line. 5-5 of Fig. 2;

Fig. 6 is a partial longitudinal sectional view taken on line 6-6 of Fig. 2 and showing a part of the inching mechanism; 7

Fig. '7 is a partial side elevation of the main operating lever and showing a modified form of connection between this member and the main actuating rod;

Fig.8 is an end view further illustrating this,

modified form of connection, and e .Fig. 9 is a partial longitudinal sectional view It is also an object of my invention to provide showing another form of stock straightening means which may be embodied in my wire-drawing machine.

In the accompanying drawings to which more detailed reference will be presently made I have shovm one embodiment of the improved wiredrawing. machine of my invention. While the machine herein disclosed represents what I now regard to be a preferred form of my invention, it should be understood, however, that the, invention may be embodied in various other wire- 1 drawing machines and apparatus.

The wire-drawing machine here under consideration is of the type adapted to be used as an attachment for a header or other metal fabricating machine and operates on the stock, in this instance, the rod or wire S being supplied to the fabricating machine. The fabricating machine may be one of the type having a pair-of intermittently operating power driven feed rolls i5 and a power shaft with which a power take-off mechanism can be connected for the operation of my wire-drawing attachment through the reciprocating main actuating rod I6. The operating connection between the wire-drawing attachment and'the fabricating machine may also include an adjustable means capable of varying the length of stroke of the actuating rod l6 from job to job to suit the length of wire blank the fabricating machine is using. It is deemed unnecessary to illustrate or further describe the fabricating machine since the general combination of such a machine and a wire-drawing attachment is disclosed in the prior patent mentioned above.

As shown in Fig. 1 my improved wire-drawing machine comprises, in general, a frame [8 anda plurality of mechanisms operatively mounted theredn. These mechanisms include a stock straightening device IS, an inching mechanism 20 for use in. feeding a new end of stock through the machine, an adjustable inching-grip 20A for holding a new end of stock during introduction into the drawing die, a reciprocating wire-drawing die mechanism 2| which operates on the stock, and a stock gripping device 22 for preventing backward movement of the stock during a working stroke of the die. a

Any suitable frame may be provided for operatively supporting these mechanisms, such as the frame I8 illustrated in this instance, which is provided at the top thereof with a guideway 24 extending in the direction of feed of the stock S. The die mechanism 2| and the inching mechanism 20 are provided with slides which are movable along this gui'deway, as will be presently explained.

The die mechanism 2i comprises a slide 25 having lateral projections 28 which operate in the guideway 26 and are retained therein by the gib plates 2'17. The slide 25 is provided with a portion 28 forming a seat or mount for a wiredrawing die 29. The die may be mounted on the portion 28 by providing the latter with a suitable opening or recess in which the die is retained by the set screw 38.

The slide is constructed with a chamber therein which provides a box or container at for holding a supply of metal-working powder or compound. This chamber extends downwardly in front of the die orifice, as shown in Fig. 5, so that the stock moves through the compound before passing through the die 29. The slide is also provided with

openings

33 and 35 which communicate respectively with the powder box and the die orifice. The opening 33 is relatively large and is located adjacent the bottom of the chamber so that the removal of a cover 35 fitting therein, permits used powder or compound to be readily discharged from the powder box through this opening and affords access to the drawing die for removal or for cleaning an objectionable accumulation from the throat of the die orifice. The cover35 is provided with a central bushing 36 through which the stock S passes and is normallyretained in the opening 33 by a clamp plate 3i which also has a central opening. The ends of the clamp plate 31 may be provided with slots which cooperate with studs 38 to form a bayonet-type connection permitting quick removal of the cover 35. The opening 3 which extends in the opposite direction from the die orifice may, if desired, be fitted with a bushing 39 which is retained therein by the set screw 60. An opening may be provided into the top of the powder box 3i for introducing the powder or compound thereinto and such opening may be closed by a removable cover tl normally held in place by the bail-type latch 52.

At opposite sides of the opening 3 3 the die slide may be provided with substantially vertically disposed fiat contact faces tit which are engaged by rounded cam portions t formed on upwardly extending laterally spaced arms @511. of a pivoted actuating lever dB. This lever is -pivoted intermediate its ends on a transverse shaft 41 of the frame so that swinging of the lever about this pivot shaft in a counter-clockwise direction will cause the die slide 25 to be moved along the guideway 26 toward the left as seen in Fig. 1. The lower end of the main actuating lever 46 has a pivotal connection with the actuating rod it so that reciprocation of this rod will cause the desired swinging of the lever about the pivot fill. The length of stroke through which the die slide is moved by the lever 36 may be varied by adjustment of the stroke imparted to the rod 16 from the fabricating machine.

The die slide 25 may also be provided with one or more depending integral brackets 59 with which a transversely extending bearing plate 5! is connected. Pairs of push rods 52 and 52a are connected respectively with the plate 5i and the die slide and extend laterally substantially parallel with the guideway 2t. These push rods are of a length to extend outwardly through the end of the frame It for connection with the stock straightening device l9 so that movement gfviiihe die slide also actuates the straightening e ce.

aaaaaoo At a point between the straightening device it and the die slide 251 provide the pair of push rods 52 with flanged sleeves 53 which are slidable on the rods and with sleeves 56 which may be anchored to the rod by means of a transverse pin 55. Each of thesleeves 53 forms a seat which is engaged by one endof a coil spring 55. The springs 56 are disposed around the push rods 52 with their other ends engaging the transverse bearing plate M of the die slide. The springs 56 are held in initial compression by the sleeves 56 and, during the normal working of the machine, are further compressed during movement of the die slide toward the left by the lever 36 so that, upon swinging of the lever in the opposite direction, they urge return movement of the die slide, that is, movement toward the right as seen in Fig. 1. Such further compression of the springs follows the engagement of the slidable sleeves 53 with the stops which are hereinafter referred to as forked arms M15. It is desirable to have the springs 56 compressed by the slide during normal working of the machine but not during inching, and therefore, as will be explained more in detail hereinafter, the stops are shiftable into and out of position to be engaged by the sleeves 53.

The gripping device 22 is mounted on the frame it at the end thereof nearest the feed rolls 95 of the fabricating machine. This gripping device may be of any suitable construction or form such that it will grip and hold the wire while the die this being moved toward the left along the stock by a corresponding movement of the die slide. During return movement of the die and die slide toward the right the device 22 releases its grip on the stock so that the stock can be pulled forward by the feed rolls I5. Duringsuch advance movement of the stock by the feed rolls l5 the springs 56 help to return the die slide so that the latter, in effect, floats with the stock instead of acting as a drag which might overload the feed rolls.

The gripping device may be of the form of construction disclosed in prior Patent No. 2,018,211, issued October 22, 1935, which in general comprises a pair of tapered complemental gripping blocks or dies 58. Rollers 59 are disposed between the tapered faces of these blocks and tapered faces of abutment members 80 such that any backward movement of the stock causes the blocks to be wedged toward each other and to firmly grip the stock.

Provision may be made for manually releasing the gripping device 22 whenever this may be desirable. This manual means may consist of a pivoted lever 6i having a forked lower end which straddles the stock and engages the blocks 58 to shift the same in a direction to release their grip on the stock.

The stock straightening device it is connected with the die slide 25 by the push rods 52 and 52a, as explained above, so that reciprocation of the die slide by the action of the lever it and the springs 53 will cause reciprocation of the straightening device. This device may comprise a body the bushing 63 over the stock which is at that time being held against backward movement by the gripping device 22. This outward movement of the bushing over the stock performs a straightening operation thereon. Y

The straightening device [8 may, if desired, be provided with one or more pairs of grooved straightening rolls 64. When the rolls 64 are provided they are arranged in. complemental relation to act on opposite sides of the stock and may be supported in an \outwardly projecting bracket-like extension 65 of the body member 82. In some instances the straightening rolls 64 are omitted, in which case the straightening device l9 is provided only with a straightening bushing 83 as shown in Fig. 9.

As already mentioned, my improved wire-drawing machine includes an inching mechanism 28 for starting the stock through the drawingdie 2 9. This inching mechanism comprises a pair of slides 61 and 68' which are operable in the guideway 24 and each of which carries a stock gripping device. The slide or may be referred to as the inching feed slide and the slide 68 may be referred'to as the inching grip slide. The slides Bil-and 68 may be generally similar in constructionand likewise the stock gripping devices carried thereby may be substantially identical in construction and'operation. To avoid repetition I-shall describe only the gripping device of the inching feed slide.

As shown in Fig. 6 of the drawings, this gripping device comprises a pair of cooperating fingers 89 and Hi which are pivoted respectively at H and 12. These fingers are provided at their adjacent ends with arcuately extending complemental grooves 13 which are of tapering or varying depth such that when the fingers are swung upon their pivots in one direction the rooves will be brought into gripping engagement with the stock S, and when the fingers are swung in the opposite direction the grooves will release the stock. For retaining the gripping portions of the fingers in the desired complemental relation and for insuring simultaneous arcu-ate movement thereof, I provide the fingers with intermeshing gear sectors 14. These gear sectors may be mounted on the fingers at one side of the grooved gripping portions it with the teeth ofthe sectors extending outwardly beyond the gripping portions into meshing relation with each other. One of the fingers, for example the finger to, may be provided with an actuating handle or lever it which extends outwardly so that it may be conveniently grasped by the operator.

The tapered grooves it of the gripping portions of the fingers are arranged, as shown in Fig. 6, such that when the lever is is swung to a vertical position indicated by the broken line lit, the stock. will be firmly gripped and when the fingers are in a position corresponding with the full line position in which the handle it is shown in Fig. 6, the stock is released. it may be desirable to provide means normally urging the fingers into gripping engagement with the stock, and for this purpose I provide the slide with a hollow projection it in which a plunger it is slidahly operable. A compression spring 5% disposed in the hollow projection normally urges the plunger outwardly so that it will tend to swing the handle iii from its released position toward its gripping position lit. The plunger lit may be restricted as to its limit of travel and held against complete disengagement from the projection 18 by means of the rod 8|.

The inching mechanism 28 is put in use only when stock is to be started through the die, and hence is inoperative during the normal working of the machine. To prevent wear upon the fingers of the gripping devices of the inching slides 81 and 68 by the passage of the stock during normal working, I may provide means for normally holding the gripping fingers in their released position as illustrated in Fig. 6. This retaining means may be in the form of a locking bolt 83 which is slidable in a hollow guide portion 84 carried by the slide. A compression spring 85 disposed in the hollow portion 84 normally urges the bolt 83outwardly to a position of locking engagement with the handle 15 as illustrated in Figs. 2 and 6. The bolt 83 may be provided with an extension part 88 adapted to be grasped by the operator for retracting the bolt when the handle 15 is to be swung or released for movement of the fingers into gripping engagement with the stock.

The inching feed slide 61 is movable in the guideway 24 so that whenthe stock is gripped bythe gripping device of this slide and the slide 'is moved toward the right as seen in Fig. 1, the

stock will be advanced a distance corresponding with the travel of the slide. For causing such feeding movement of the slide 61 I provide an actuating or feed link 88 which is disposed in a hollow portion of the frame I8 beneath the guideway 24. One end of this link extends upwardly and is pivotally connected with the slide 61 by means of the pivot pin 89. The other end of the feed link 88 extends between the spaced arms of the actuating lever 46 and is provided with a transverse notch or hook-like opening 98 for engagement with a pin or the like 9! extending transversely between the arms of the actuating lever. When the feed link 88 is lowered to its broken line position 92 (Fig. 1) to bring the transverse opening into engagement with the transverse pin 9|, a driving connection is estab-' lished between the actuating lever 46 and the feed link. It will be noted in this connection that the transverse pin BI is relatively close to the pivot shaft 41 of the actuating lever 46 so that rocking of this lever imparts a relatively shortstroke movement to the feed slide 61. The length of this stroke may be varied as desired, by providing the spaced arms of the lever 46 with other openings 93 to which the connecting pin 9i may be shifted. The closer the pin 9! is located to the axis of the pivot shaft ll, the shorter will be r the stroke of the feed slide.

The slide fit of the inching grip device 20A is also movable along the guideway 2 8, as mentioned above, but such movement is desirable only for the purpose of adjustably locating the inching grip relative to other parts of the machine. The need for adjustment of the inching grip slide arises from the fact that the stroke of the die slide is varied from time to time to suit the length oi wire blank being used by the fabricating machine and, because it is desirable to have the inching grip slide as close as possible to the extreme end of the drawing stroke of the die slide, it is important to provide for adjustment-of the inching grip slide. The reason why it is desirable to have the inching grip located close to the extreme end of the drawing stroke, is to reduce to a minimum the rod length which is unsupported during inching because an unreasonably long length of rod would buckle. As

the stroke a connected from the pin 8|.

of the die slide is varied, it frequently becomes necessary to vary the stroke of the inching feed slide, and this isdone by shifting the connection between the feed link 88 and the lever t6 toward or from the pivot axis t'i as explained above.

When the inching grip slide 68 has been moved to a desired position of the guideway 24 which, as just explained, may be a position relatively close to one limit of travel of the die slide 25, it is desirable to clamp the inching grip slide in. such adjusted position. For this purpose I provide opposite outer edges of the slide 68 with rack sections 95 which are adapted to be engaged by locking members 96 also in the form of rack sections. The rack sections 96 may be carried by actuating screws 91 which are mounted on the frame I8 so that by manipulation of these screws the rack sections can be moved inwardly into locking engagement with the racks of the slide 68 or can be moved outwardly to be disengaged from the racks of the slide. Thus, by this means the inching grip slide can be locked'and held in a desired position of adjustment along the guideway 24.

I have already mentioned the fact that the inching mechanism 20 is to be used only when stock is being started through the die 28, and hence it is desirable to provide means for disconnecting the feed link 88 from the actuating lever 46 so that the inching feed slide 61 need not be operated except for inching purposes. Suitable means for disconnecting the link 88 from the lever 46 may consist of a manually operable lever 99 connected with a transverse pivot shaft I and a latch member IOI connected with the pivot shaft to be moved thereby into lifting engagement with the feed link 88. The latch IN is preferably such that when it has been moved into engagement with the feed link to disengage the latter from the pin 9|, a lug 99' engages a stop on the frame I8 and the latch assumes a dead center position with respect to the pivot shaft I00, as illustrated in Fig. 1, and. the feed link 88 will be held in its elevated position dis- When it is desired to have the inching slide 61 operate, the lever 89 is swung toward the right as seen in Fig. 1, thereby moving the latch IOI to its lower broken-line position I02 and thus lowering the feed link"88 for connection with the pin 8 I.

When the inching mechanism 20 is being operated, it is desirable that the springs 56 shall not act on, the die slide 25 so as to permit the die slide to be operated through only a short travel of stroke along a working section of the guideway near the inching grip slide 68. To thus render the compression springs 56 inefl'ective I employ the movable stops in the form of forked arms I05, which are shiftable into and out of cooperation with the flanges of the sleeves 53 of the push rods 52. The forked arms I05 are carried by a bell crank I06 such that by swinging of this lever on its pivot I01, the arms can be moved into or out of position to be engaged by the flanged sleeves 53 of the push rods. For moving the stops I05 into their operative position, shown in full lines in Fig. 1, I' provide the lever I06 with a forwardly extending arm I08 which is adapted to be engaged and actuated by an extension I08 of the latch member IN. A tension spring IIO, having one end thereof connected with the lever I06 and its other end anchored on the frame I8, acts on this lever normally tending to swing the stops I05 to their inoperative broken line position III. Since the extension I09 and the latch member aaaaaoo WI are both actuated by the lever 89, it will be seen that movement of this lever in a direction to lower the feed link 88 for connection with the lever 66 will simultaneously disengage the extension IEIQ from the arm I08 and permit the spring M0 to shift the stops I05 to their inoperative position. When the springs 56 have been thus rendered inefiective, the die slide 25 is returned, following each of its working strokes, by the forward movement imparted to the stock by the inching feed slide 67. In other words, during the operation of the inching mechanism, the die slide 25 is moved toward the inching grip slide 68 by the lever 46 as this lever moves through the latter portion of its swing, and this movement of the die slide constitutes a working stroke which causes the die to be forced over the stock while the stock is being held against backward movement by the gripping device of the slide 68. When the lever 46 is swung in the opposite direction, that is, in a clockwise direction, the feed link 88 causes the inching feed slide 61 to move in the same direction to feed a section of the stock forward through the inching grip device of the slide 68. This same forward movement of the stock returns the die slide 25 preparatory to another working stroke thereof during the succeeding swinging movement of the lever 46.

When the inching mechanism has been operated for a long enough period to cause the advancing stock to extend through the gripping device 22 which holds the stock against backward movement during drawing, it is no longer necessary to hold the stock with the inching grip 68 or to push the stock forward by short steps with the inching feed slide 61. It isdesirable that the leading end of the stock be inserted with as little delay as possible between the feed rolls I5 of the fabricating machine, and for this purpose I provide manual means for shifting the die slide 25 as far forward as permitted by the swing of the operating lever 46 to thereby bring the leading end of the stock into the feed rolls. This manualmeans may consist of a lever II3 which engages the transverse bearing plate 5I of-the die slide and is connected to a transverse pivot shaft III. Actuation of the lever H3 to cause this forward movement of the die slide and the stock, may be caused by rocking the pivot shaft I I4 by means of a suitable handle I I5.

I have already stated that the reciprocating actuating rod I6 has pivotal connection with the actuating lever 46 and that its stroke is variable by adjustable driving means connected to the fabricating machine and, as one of the features of my invention, I provide a novel arrangement for this pivotal connection. It is desirable in a machine of this type that an overload release be provided so as to prevent breakage of the ap paraitus in the event that an overload occurs, as for example, through interference between the die slide 25 and the inching grip slide 68 resulting from improper setting of the grip slide with reference to the travel of the die slide or through the stock having folded up and accumulated into an obstruction between the two slides. This overload release is, in this instance, embodied in the novel pivotal connection between the lever 46 and the rod I6. The overload release may consist of a frangible element or shear pin III mounted in bushings II8 carried by the lower end of the lever 46. The pin also extends through a bushing I I8 carried by an extension part I20 of the actuating rod I6 and thus also acts as the pivot pin. When an overload occurs the pin H1 is sheared and this prevents breakage of the apparatus at some other point.

The novel feature of the pivotal connection between the lever 46 and the rod I6 consists in the means for preventing the rod from dropping down and digging into the floor or causing other damage when the pin II! is sheared. This means consists in extending the part I20 beyond the axis of the shear pin 'I I! for a distance greater than the maximum working stroke of the rod I 6, and in providing the lower end of the lever 46 with a stirrup-like part Hi. When the pin II! is sheared the extension part I20 will drop into engagement with the stirrup part I2I and will be supported by this part even though the operating ro'd I6 continues to be reciprocated by the power device with which it is connected.

In Figs. 7 and 8 of the drawings I have shown another novel form of pivotal connection which may be provided between the actuating rod I6 and the lever 46. In this latter connection I form the lower part of the lever 46 of two sections I22 and I23, the former of which is an integral part of the lever and the latter of which is a movable part. This latter part may be connected with the lever as by being mounted upon a bushing I24 extending through the pivot opening of lever 46 by means of a pivotal connection I26 provided between the rod and the lever section I23. When an overload occurs the bolt I25 breaks and permits the lever section I23 to swing on the bushing I24 and thus reciprocation of the rod I6 may continue without causing movement of the lever 46.

From the foregoing description and the accompanying drawings it will now be readily seen that I have provided an improved wire-drawing machine which is adapted to serve as an attachment for a header or other metal fabricating machine to which stock is supplied in the form of a wire or rod. It will be further understood that this improved wire-drawing machine embodies numerous novel features which enable it to operate eiiiciently on the stock being supplied to the fabricating machine, and which provide for the power operation of an inching mechanism where by a new length of stock can be quickly started through the drawing die and the feed rolls of the fabricating machine.

While I have illustrated and described my improved wire-drawing machine in a somewhat de tailed manner, it should be understood that I do not wish to be limited to the precise details of construction and arrangement of parts herein disclosed, but regard my invention as including such changes and modifications as do not constitute a departure from the spirit of the invention and,

scope of the appended claims. I

Having thus described my invention I claim:

1. In apparatus of the class described the combination of a reciprocable wire-drawing die, and an inching mechanism for starting wire stock through said die comprising a reciprocable stock feeding device operable to intermittently advance the stock, a gripping device between the die and the feeding device operable to intermittently grip said stock for preventing backward movement of the stock and power means operable to cause reciprocation of the feeding device and die.

2. In apparatus of the class described the combination of a movable wire-drawing die, a gripping device for preventing backward movement of wire stock being started through the die, power means operable to move .the die toward the gripping device to cause the same to traverse the stock, and stock feeding means disposed on the same side of the die as said gripping means and actuated by said power means, said feeding means being operable to advance the stock and to cause return movement of the die.

3. In apparatus of the class described the combination of a movable wire-drawing die, a movable device for feeding wire stock toward the die, a gripping device between the die and feeding device for preventing backward movement of the stock, means for causing intermittent working strokes of the die toward the gripping device, and common operating means for actuating said movable device to intermittently advance the stock and for causing return movement of the die.

4. In apparatus. of the class described the combinati'on of a reciprocable wire-drawing die, power means operable to cause a working stroke of the die, and an inching mechanism for cooperation with the die in causing stock to be started through the latter comprising a. gripping device operable to hold the stock during the working stroke of the die and a reciprocable feed device actuated from said power means and operable to advance the stock and cause return movement of the die, said feed device being on the same side of the die as said gripping device and itself having means for gripping the stock.

5. In apparatus of the class described the combination of a reciprocable wire-drawing die, power means operable to cause a working stroke of the die including a pivoted lever, an inching mechanism for cooperation with the die in causing stock to be started through the latter including a reciprocable feed device movable toward and from the die on the starting side thereof, and operating means connected with said feed device and with said lever adjacent its pivot point whereby intermittent relatively shortstroke movements may be imparted to the feed device.

6. In apparatus of the class described the combination of a frame having thereon a reciprocable wire-drawing die, power means operable to cause a working stroke of the die including a lever pivoted on said frame, an inching mechanism for cooperation with the die in causing stock to be started through the latter including a reciprocable feed device movable on the frame, an actuating link connected with said feed device, and means for adjustably connecting said link with said lever at varying distances from the pivot point of the latter.

ment of the die, and means for adjustably positio ning said gripping device with respect to the end of the working stroke of the die.

8. In apparatus of the class described the combination of a reciprocable wire-drawing die, power means operable to cause a working stroke of said die, inching mechanism toward which the die is moved during its working stroke comprising means operable for feeding and holding, at relatively timed intermittent intervals, stock being started through the die, and means connecting said inching mechanism for actuation by said power means.

9. In apparatus of .the class described the combination of a reciprocable wire-drawing die, power means operable to cause a working stroke of said die, inching mechanism toward which the die is moved during its working stroke comprising means operable for feeding and holding, at relatively timed intermittent intervals, stock being started through the die, means connecting said inching mechanism for actuation by said power means, and manually operable means for rendering the last mentioned means inefiective.

10. In apparatus of the class described the combination of a reciprocable wire-drawing die, means for causing a working stroke of the die, gripping means for holding the stock during such working stroke, feeding means operable to advance the stock, and a spring arranged to be stressed during the working stroke' of the die and to cause return movement of the die during feeding of the stock.

11. In apparatus of the class described the combination of a reciprocable wire-drawing die, means for causing a working stroke of the die, gripping means for holding the stock during such working stroke, feeding means operable to advance the stock, a stop having a working position spaced from said die, a spring adapted to be compressed against said stop during the working stroke of the die and to cause return movement of the die during feeding of the stock, said stop being movable into and out of such working position.

12. In apparatus of the class described the combination of a reciprocable wire-drawing die,

- means for causing a working stroke of the die,

inching means cooperating with the reciprocat ing die in causing stock to be started through the latter, means for causing operation of said inching means, spring means operable to return the die after a normal. working stroke thereof, and manually operable means for substantially simultaneously rendering the inching operating means efiective and the spring return .means ineffective.

13. In apparatus of the class described the combination with a fabricating machine having a stock feeding device, a wire, drawer comprisinga reciprocable wire-drawing die, means operable at one side of said die for feeding and holding wire stock, means operable to cause working strokes of the die for starting the stock therethrough, a gripping device at the other side of said die, and means for manually shifting the die toward said gripping device and moving the drawn stock through the latter and into engagement with said stock feeding device.

14. In apparatus of the class described, a wiredrawing die, means operable to cause relative movement between wire stock and said die including a pivoted member and an actuating member, one of which has an opening therethrough and the other of which has an extension part passing through said opening, and a frangible element normally connecting said members.

15. In apparatus of the class described, a reciprocable wire-drawing die, a pivoted lever connected with said die and having an arm provided with an opening, a reciprocating actuating rod having an extension part extending through said opening, and a shear pin connecting said extension part and said lever arm, said extension part being of greater length than the stroke of the actuating rod.

16. In apparatus of the class described a wiredrawing die, means operable to cause relative movement between said die and wire stock extending therethrough including a lever and an actuating rod, and means connecting the lever and rod comprising a frangible member and 00- operating portions of the lever and rod adapted to prevent complete separation thereof upon breaking of said member.

17. In apparatus of the class' described the combination of a reciprocable wire-drawing die,

a straightening device connected with said dieat 18. In wire drawing apparatus the combination of a reciprocable wire-drawing die, a reciprocable wire-straightening means engaging the stock ahead of the die, power means operable to move said die and said straightening means in. the same direction through a working stroke, and feed means operable to advance the stock after such working stroke.

19. In wire drawing apparatus the combination of a reciprocable wire-drawing die, a reciprocable wireestraightening means engaging the stock ahead of the die, power means operable to move said die and said straightening means in the same direction through a working stroke, feed means operable to advance the stock after such working stroke, and means for causing a return stroke of the die and straightening means including a spring arranged to be tensioned during the working stroke.

20. In wire drawing apparatus the combination of a frame having a reciprocable die slide and a reciprocable feed\device thereon, a die carried by said die slide, gripping device between the ieed device and $6 die slide for preventing backward movem of the stock, and means operable to cause working strokes of the die and relatively short-stroke feeding movements of the feed device including a movable 'member adapted to engage the die slide during a portion of the movement of such member and to disengage the die slide during another portion of the movement of such member.

21. In apparatus of the class described, a reciprocating wire-drawing die, a lever adapted to be swung to cause reciprocation of said die, a reciprocable power member for swinging the lever, said lever having an opening therein and a transverse stirrup-like means at the lower end of such opening, an extension part on said power member projecting through said opening, and a frangible pin extending through said extension part and lever, said extension part being of greater length than the normal stroke of the power member.

' 22. In mechanism of the class described, a.

engaging jaws, a reciprocating carrier for said jaws between saidstraightening means and die, means within said carrier operable automatically upon reciprocation of said carrier to alternately grip and release the work, and oscillating means 5 for reciprocating said carrier.

. FREDERICK W. GAINES, 3RD.