US2228746A - Combined feeding and cold drawing mechanism - Google Patents

Description

L. BERKEBIL coMiaINED FEEDINGAND coLDVDRAwING MECHANISM Jan. 14, 1941.

'Filed June 27, 1938 i 5 Sheets-Shet l\ l INVENTR y LEE BERKEBIL ATTORNEYS:

n1M, A.

Jan. 14, 1941. l.. BERKEBJL l cQnBINED EEEDING Am)l coLD DRAWING mscmufusu Filed June 2v, 193e 5 sheet-shee't 2 INVENIOR LEE BERKQBIL ATToRNEps Jan. 14,1941... L BERKEBIL y2,228,746

l COMBINED FEEDlNG AND COLD DRAWING MECHANISM Filed June 27, 193sv 5 sheets-sheet s l INVENTOR LEEy BERKEBIL ATTORNEY Jan. 14, 1941. BERKEBU.

' COMBINED FEEDING AND coLD DRAWING MEGHNVISM Fi1ed Jane 2v, 1938l r5 sheetsfsneet 42.

, FIGQQ;A

vIAWENTOR LEE BERKEBII.

f ATTORNE? SA .`Ian.14v,1941.4 BERKEB-.L 2,228,746]

comg'INED FEEDING AND COLD DRAWING MECHNISM Filed June 27, 1958 5 sheets-sheet 5 INVENTOR FIG LEE BERKl-:BIL BY ATTORNEYS Patented 14, 1941 PATENT, orifice l COMBINED FEEDING AND coLD DRAWING BIECHANI L ee Berkebil, Detroit, Mich., assignor'tc B. Manufacturing Company,l Detroit, Mich., a corporation of Michigan Applicaticn June finisca-serial No. 216,134` t 40 Claims.

The invention relates to heading machines and the like and has for its object the obtaining of an improved construction which facilitates operation and functions with greater accuracy inV the perfomance of its work. It is a further object to obtain a construction which may be used as an attachment to standard heading machines to improve the performance thereof. With these objects in view, the invention consists in the construction as hereinafter set forth.

In the drawings: A

Figure 1 is a sectional plan view of a heading machine to which my improvements are applied;

Figure 2 is a side elevation of the feedingmechanism;

Figure 3 is ayertical central tion therethrough;

Figure 4 is an enlarged vertical longitudinal section on line 4 4 of Figure 1;

Figure 5 is a similar view showing the parts in a different position of adjustments;v

Figure 6 is an enlarged plan view of a portion of Figure 1;

Figure 7- is an enlarged horizontal section on line 1 1 of Figure 2; f

Figure 8 isav vertical Figure '1;' Figure- 9 ure 2;

Figure Figure 2;

Figure A11 is an enlarged horizontal section through the sizing die, on line II-II of Figure 2';

Figure 12 is of Figure 2;

Figures 13 vand 14 are end elevations. of the cut-on and transfer means for the blank;

Figure 15 is a section on line I5-i5of Figure 40 14 showingthe heading mechanism;

Figures 16, 17 and 18 are similar views illustrating successive steps in the heading Aoperation;

Figures 19 and 20 are diagrams illustrating the operating and timing mechanism;

Figure 21 is a plan view of a portion of Figure 1 showing a modified construction.

My improvements are applicable to various types of `heading machines and the like and may also be used as attachments or replacements .on machines of diiferent-v constructions. I will, therefore, describe only in a general way one type of heading machine to which my improvements may be applied. As shown in Figure'l, A is the bed or frame and Bv a reciprocating head` slidlongitudinal sec-' section on line H of is a cross section onv line-9 9 of Fig- 10 is a crossl section on line Ill-I0 of a horizontal section online lI2--I2` gear wheel G' is upon a shaft G2 of the movementthereof.A

ably engaging ways C and actuated by a crank or eccentric D on the main driving shaft E, through the medium of a connecting rod F. yOn the headB is mounted a verticallyreciprocating slide B' which carries a plurality of heading dies B3.' B3. 'Ihe stock for forming the-blanks is ad.

vanced in. a plane laterally offset from the plane of the dies B2, B3. It is then cutoff in predetermined lengths and the blanks thus formed are transferred into the plane of the .dies to be successively operated upon thereby. The mechanism for accomplishing these functions includes a gear wheel G on the shaft El which drives an intermeshing gear wheel G' in a 1 to 2 ratio. The

transverselyof the bed parallelto the shaft E. At opposite ends of the shaft G2 are variable throw cranks. G3 and G4; the one for operating the stock feeding mechanism, and the other for operating the blank shearing and transfer mech- 20 anism. There is also a cam G5 on the shaft `G2 which operates ,a mechanism for actuating the slide B so as to alternately place the dies B2 and B3 in registration with a cut-olf blank in its transferred position. More in detail and as 25 shown in Figure 19, the Acrank G3 is provided with a crank pin H, which is adjustable radially in a slot H to increase or diminish the throw thereof. A rod'H2 connectsv this crank pin with an adjustable pin H3 on the lever H4 for oscillating a 30 gear wheel I, the arrangement' being such that for two revolutions of the crankshaft E one revolution is imparted to the crank G3. Also, the length'of the arc through which the gear wheel I is oscillated may be Varied by adjustment of the crankv pins H and H3. This gear wheel forms a part of my improved stock feeding and drawing .mechanism which will behereinafter described.

.The crank G4 is connected by a rod J with a slide J' which has a cam slot J2 engaging a .pin 40 J3 on a transversely movable slide J4. 'I'he slide J4 actuates the shearing and transfer member J5 as will be later described.

'I'he mechanism for operating the slide B' is shown in Figure 20 and comprises a slotted mem- 45 t ber K slidably mounted on a bearing K on the shaft G2 and reciprocated by the cam G5 which engages rollers K2 onsaid member K. The member K is connected to a rock arm K3 on a rockshaft K4, which extends transversely of the bed 5u and has a rock arm K5 connecting the same with the slide B. The cam G5 is so fashioned as to intermittently actuate this mechanism to raisev andlower the slide B' with a dwell at each end 55 which extends 15 t M3 with a sliding head N forming the forward The construction thus far described is, as above stated, only one form of heading machine to which my improvements may be applied, the .gen-

eral functions performed by this machine being:

.a sizing die, and advanced to the shearing and transfer mechanism, the constructionbeing .as

follows.

Connectedto the bed A and arranged in a vertical plane .which is laterally offset Vfrom the plane of the dies B3, B3 is a frame L. This frame is formed in severalsections including a central die-holding section L and .sectionsL2 and L3 onopposite sides thereof which constitute slideways for stock feeders. The outer end of the frame is also floatngly supported by a pivotal link member L4 which rises from a supporting base L5. The stock is advanced through the lframe L in a direction from left to right, Figures 1 to 3, and for convenience in description, I will designate the portion to. the right as forward and that to the left as rear.

Extending across the bed A and the forward end of the frame L are a pair of shafts M and M' which are in the same vertical plane and are connected to each other at one end by the intermeshing gear wheels I and I fixed to the respective shafts. In central alignment with the frame L are rock arms M2 which are connected by links feeder.v As this feeder has heavy work to perform it is quite essential that the links M3 should be properly aligned so that the direction of pull will be parallel to the slideways and with no tendency to tilt the slide N therein. Inasmuch as the shafts M and M' are driven through the medium of intermeshing gear wheels, it is necessary that the rock arms M2 should be very accurately positioned on said shafts to produce this parallel movement of the links M3 and head N. This is accomplished by first connecting each rock arm to its shaft through the -medium of a key M4 having a wide portionM engaging the keyway in the rock arm and a narrow right angularly -extending portion M engaging a keyway in the shaft. Thus by reversing the key M4 the rock arm will be circumferentially adjusted upon the shaft a distance equal to the variation in widths of the portions M8 and'MQ. Further and more accurate angular adjustment is accomplished by forming the rock arm in two sections embracing the shaft and connected to each other by clamping screws M5. Sufcient-clearance is provided between the ad jacent faces of. these sections, so that by loosening one screw and tightening the other, one section may be angularly adjusted with respect to the other. The section which has the pivot pin Ms connecting with the link M3 ls the ladjustable section, while thefother section contains the key M4 Nfor attachment to the shaft. Thusv by means of these two adjustments the required accuracy and positioning of the rock arms may be accomplished.

The slide head N of the forward feeder has These portions are held in rigid elation` to each e other by side plates N and splines N3, N4l are clamping jaws within the recess and having their 'I'herods P' outer surfaces parallel to the surfaces N' with rollers N5 arranged therebetween. The jaws N4 embrace the stock which is to be 'fed and during the forward movement of the head N the resistance or load. will tend to draw the jaws rearward,

thereby wedging the same. to' tightly grip the stock. 0n the other hand, when the member N is moved rearward, this will instantaneously release pressure on the jaws so as to permit. the same to. slide rearward over. the stock. Springs N within the recess and bearing against the forward ends of the jaws will hold the same in vfrictional engagement with the stock. A spline N? extending vertically andengaging spline ways in the jaws N4 hold the same in alignment while permitting movement toward or from each other.

There are also bushings N8 and Ns in the sliding head N for guiding the stock 4passing there- For this purpose the die is surrounded by an annular member O' which is fixed in the forward wall O2 of the section L'. A friction shoe O? ex-A tending through a recess in the annular membe O' bears against the die'O, and a spring O4 places a tension on vthe shoe. This tension may be varied by an. adjusting screwOi which bears against the follower O8 forming an abutment for the spring. To limit 'the sliding movement of the die within the annular member O' screws O'I extend through threaded apertures in the rear wall O of the section L' into proximity to the die,

and these screws may be adjusted to obtainthe` desired amount of movement.

'I'he feeder N being forward of the die O it is obvious that some additional means must be provided to-advance the forward end of the stock through the die before it can be engaged by said feeder. For this purpose I have provided a sec'- 'ond feeder P which is substantiallythe same in construction as the feeder N'and, therefore,

will not be described in detail. 'I'his second feeder is actuated by the feeder N through the medium of rods P'. rods threadedly engagethe head N and extend rearward therefrom through apertures in the The-forward ends of these wallsO2 and C)8 into'the section L2 of the frame L. The rear ends of these rods are also threaded and have engaged therewith correspondingly threaded sleeves P2 which formv shoulders that vmay be adjusted into different positions. A screw P3 engaging the rear portion of the sleeveP2 and bearing against the rod P serves to lock these members in anydesii'ed positionof adjustment. o pass through channels in the feeder P, and prings P4 sleeved on the rods for-l ward of the feeder P yieldably, press said feeder vrearward-toward the limiting stops formed by the 'sleeves P2. There is, however, provision for holding the feeder P forward against the tension of the springs P* so that the rods P' will merely slide through the channels. This means is shown in Figures 10 and 2 and comprises a crank arm Qmounted on a shaft Q' which is journaled in a side plate of the feeder, ,and a pinion Q2 on the shaft intermeshes with-the gear wheel Q3 to form a step-down transmission. A The gear wheel Q3 Lis upon a shaft Q4 also journaled in the side plate and having a pinion Q5 whichl is in mesh with a stationary rack Q's on the fram'e L. Thus by rotension of the springs P4 will return the memberv P to its normal position. The reclprocation of the rods P' and sleeves Pz'willv then correspondingly reciprocate the feeder P. The cr-ank handle Q is detachable from the shaft Q',but the gears Q2, Q3 and Q5 together with their shafts Q' and Q4 will be oscillated during the reciprocation of the feeder P. It is sometimes desirable to limit the stroke of the feeder P which is accomplished by a stop-screw Q9 secured to the frame L at its rear end and adjustable into the path of ,the feeder. l

The feeder P when thrown ,into operation may be used for advancing the stock through the die and into engagement with the forward feeder N. However, before this is done it is convenient to separate the 'jaws of the rear Vfeeder vagainst the 'closing tension of the springs N so that the stock may be easily inserted by hand therebetween. 'I'his is accomplished by the mechanism illustrated in Figures '7 to 9, and the same construction may be applied to both the feeders N and P, but on the-former for emergency use only. As shown, a gear wheel R having a stub shaft R' is mounted on one of the side plates N"-z and is'in mesh with a rack-bar R2 which is vertically slidable in guideways R3 at the rear end of said plate. 'I'his rack bar. has a cam portion *R4 contacting with-a roller R5 on a sleeve R6 which latter carries the bushing Nit Thus, by rotating the gear wheel R the rack bar can be moved into position where the sleeve R6 will contact with the rear ends of the jaw members N4 moving them forward against the Atension of the springs N6 and thus permitting them to separate a suflcient distance for the insertion of the stock therebetween. A notch RI at the end of the cam will hold the parts in this position until the stock has been inserted through the jaws. As shown in Figure 2, this adjustment means is on the front side of the head N and is provided with an operating handle R8 for actuating the same. .A similar mechanism is placed on the back side of the member P, being operated by a handle R9.

Y The bushings Ns and N9 .for the feeder N may Vbe selected with respect to the diameter of stock to be passed therethrough, and similar bushings are provided for the feeder P which are of a diameter corresponding to that of 'the stock before it passes through the sizing die O. Still another bushing S is mounted at the rear end of the frame L and the stock vis rst .fed through this bushing and into operative relation to the jaws of the rear feeder P. Duringl the initial operation of the feeder P, it is necessary to hold the stock from moving rearward when the feeder moves in' this direction. This function is per-l formed by the mechanism shown in Figure. 6, comprising a shoe Son' one side of the stock and a cam shoe S2 on the other side of the stockl actuated by a spring S3 to produce the required amount of friction. This -is greater than the friction of the feeder jaws when moved rearward over the stock so that the latter remains stationary until the `iaws again 'grip the same for lease the jaws l 3 a Succeeding step forward. The shoe S2 is only left in this position during the feeding of the stock through the sizing die O, after which the friction of the latter vwill be suicient to hold it from rearward movement, and the ca m shoe S2 can be thrown for rotating the same. As soon as the spring S3 passes the center of the cam its tension will act to hold the cam in this position.

It sometimes happens that a section of stock will be bent or fouled. in the' machine, and it is necessary to withdraw itbefore the machine can be further operated. The high friction of the portion of the stock' which is in engagement with the sizing die O would render it diilicult to withdraw it'from the die out of action by a handle S4 l by -hand p ower. I have,

of the feeder P upon the stock passing therebetween, so thatthey will clamp the stock even when the feeder is moved in a rearward direction. This locking means comprises screws P5 which threadedly engage the forward end of the member P and adapted to be adjusted against. the forwardend-of the jaws to force the same rearward until they firmly clamp the stock. This clamping is effected when adjusted to its forward position,'as shown in Figure 2, where the cam QI locks it to the rack bar Q6. This cam may then be released and the crank handle Q engaged with the shaft Q' and rotated in the direction td move the feeder Pv rearward. If the amount. of movement is not suiiicient to completely withdraw the stock from the die O the screws P5 may be adjusted to rewhile the member P is again moved forward by the crank handle Q, after which the screws P5 are again adjusted to clamp the jaws and the member P is again drawn rearward. In this Way fouled stock can easily be extracted from the machine.

When a stock bar is' fed forward to the point where its rear end disengages from the sizing comprises a split .bushing T arranged forward' of the feeder and held in .position in the frame L by a screw T. A second screw 'I2 engaging the split portion of the bushing is revoluble by means of a handle T3 to contract said bushing and to place the desired friction on the stock. Thus, the forward feeding of the stock can continue until its rear end disengages from the forward feeder N, after whichA it is still fed forward by a succeeding stock bar. Thus, the only waste is an end portion too short to form a blank of the required length.

y In the operation of the machine-the feeding mechanism may be adjusted to advance the stock bar during each forwardA movement an amount slightly greater than the length of blank which is desired. The stock bar is then moved slightly rearward` so that the length actually sheared therefrom is exactly as predetermined. However, Vduring the shearing operation the shear blade must be inserted between the severed blank t the feeder P- has been en'd of the sheared blank fromany displacement.

Such construction is objectionable in not providing for the displacement ofl the blank during shearing and -I have therefore designed an improved construction. This, as shown in Figure 1, comprises a resilient member U secured to an adjustable screw U and projecting laterally therefrom `into the path of the stock bar. The screw U may be adjusted so that the stop is in advance of the. shearing plane a. distance corresponding to the required length of blank. Consequently, as the stock baris overfed a certain amount, it will impinge against rthis resilient stop and slightly displace it in a forward direction. However, upon the rearward movement of the feeder N the resiliency of the member U will force the stock |bar rearward which is. permitted by the freedom of the die O slide rearward in the annular member AO'. T insure a positive action independent of theresiliency of the memagainst said member U during alternate rearward movements of the head B. However, before the shearing of the blank takes place, the positive stop is withdrawn which permits the exible stop member U to be deflected forward the required amount.

A modification of the stop mechanism just described is illustrated in Figure 2l, where the positive stop U2 is omitted. In this the adjustable screw U is provided with a rigid laterally extending arm U3 at the end of which is mounted a movable stop member U4 pressed rearward by the tension of a spring U5V and limited in this movement by a shoulder U2. -This spring will permit the forward vdisplacement of the stop U4 during the overfeeding of the stock bar and also when the blank is displaced by the shearing blade, but the-tension of the spring U5 is suicient to return the stop U4 to the limiting shoulder Us, when the feeder N is moved rearward. The functioning is thus essentially the same as that of the construction shown in Figure 1. y

Operation The stock which is preferably hot-'rolled and' coiled is placed in Ya. suitable holder, not shown,

and its forward end is passed through the bushing S into engagement with the rear feeder P. Prior to this the handle R2 has been moved t0 adjust the mechanism shown in Figures 7 to 9, so as to move the jaws of the feeder forward and to permit the same to'separate vsufiiciently for the insertion of the end of the stock bar. The handle R2 isn then turned into its normal position which permits the jaws'to grip the stock bar and to feed it forward in successive steps. However, the friction device,.illustrated in Figures 1 and 6, is adjusted into the position shown in the latter ligure where it will hold the stock bar from moving rearward with `the-feeder P. After the required number of,reciprocations. of the feeder P the stock bar wilLbe advanced into engagement with the die O and then forced through the latter. -The friction device S2 can. then be adjusted into its inoperative position shown in Figure 1, and the friction of the die O depended upon for holding the stock against rearward movement other than that permitted by the movement of' the die against the stops The forward advancement by the rear feeder is continued until the forward end of the stock bar which has been sized by the die 0 comes into operative engage.

ment with the forward feeder N. The rear feeder may then be thrown out'of actiony by adjustment of the mechanism shown in Figures 2 and 10, the crank handle Q being engaged with the shaft Q and the latterrevolved to transmit motion to the pinion Q causing it to travel forward' onthe rack Q2. v At the end of this movement the cam lever Q'I is engaged with the notch Q2 which will hold the feeder P forward and in its inoperative position. Thus, 'while the forward feeder N continues to reciprocate-and moves with it the rods P' and sleeves P2, the latter do not come in -contact with themember P. At the same time the handle R2 is thrown forward, locking the jaws of the rear chuck open, thus Apreventingthem from wearing out.

When the forward end of the stock passes l predetermined lengths will be advanced in each ber U, a stop member U2 on the slide B is moved operation. The length `of advancement is determined by the adjustmentL of one or the vother of the crank pins H and H-l to increase or diminish the amplitude of oscillation of theshafts M a and-M. This length may be, however, somewhat in excess of the length desired for the blank so that the forward end will impinge against the resilient' stop U or U4 and slightly displace the same. As soon as the feeder N begins its. return movement the resiliency of the stop will Push the stock rearwardfcarrying with itthe die O which slides in the annular member O. Where the construction shown in Figure 1. is used the stop U2 on the slide B will be brought in contact with the resilient stop U rto insure a full return movement of the latter to its normal position. Where however, the construction shown in Figure 21 is used, the tension on the spring U5 will be sulcient to return the stock against any frictional resistance, andthe shoulder U6 will exy actly determine its position. Thus, with either of the constructions the length of blank projecting beyondthe shearing plane is predetermined.

The operations of shearing the blank, transferring it into the plane of the heading dies and alternate shifting of these dies into alignment with the blank, are accomplished by the mechadescribed, but which forms no part of the present invention. In brief, the movement of in Figures -13 and 14. The shape of the cam slot it into the plane of the dies B2 and B3, as shown J2 is such as to produce. a dwell of the shearA member when the blank is in the plane of the ,q dies, and by reason of the 1 to 2 ratio of the gears `G and G', there will be two reciprocations of the head B` to one reclprocation'of the transfer member J5. Also, between reciprocations of the head B the mechanism shown in Figure. 20 will operate-to move the slide B', so that during one reciprocation the die B2 is registered with the blank and during the other, the die B2. A cooperating stationary die B4 is in registration with the blank in its transferred position. -After the '-initial movement of the die B2 suiiicient to engage the same withthe blank the transfer member J5 is withdrawn, the resilient clip V yielding to disengage from the blank.' These operations are illustrated iii-Figures 15 to 18. During the shearing operation the thickness of theshear member will blank against a rigid stop might tend to dislodge the same.

When the rear end of a stock bar passes beyond the die O, the friction clamp T s'hown in Figure 12, is usedto hold the bar from rearward movement during-the succeeding steps of the feed.

If at any time it should become necessary to remove a portion of the stock bar from the machine, this can be accomplished, as previously described, by adjustingthe screws P5 and clamping the jaws of the rear feedmember P, after which the crank handle Q and mechanism operated thereby can be actuated to withdraw the stock in a rearward directio The rear feeder P when not in use for advancing'the stock still performs the function of stiiaightening the rod as it is drawn therethrough by the forward feeder. pivotal link L4 permits any slight movement thereof occasioned by the stresses to which it is subjected while maintaining a rigid connection with the main frame or bed A.

The oating support ofthe .frame L by thel When the stock isbeing advanced by the rear v feeder it is necessary to support the portion which is between the feeder and the die, .so as to avoid bending or buckling of the same. This is accomplished by supporting sleeves or bushings surrounding the stock and as shown in Figure 3, there is a long sleeve W attached to therear wall of the section L' and extending forward into proximity to the die O, but leaving sufficient clearancefor the oating movement of said die. There is also a shorter bushing W at the forward end of the feeder P which extends into proximity to the forward ends of the gripping jaws. There is, however, one portion of the stock I between the gripping jaws and the die which necessarily remains unsupported, viz: the portion which is between the sleeves W and W when the feeder P is withdrawn to its rearmost position. For large diameter stock, such for instance as one inch rod, this distance is not enough to materially reduce the rigidity, but with smaller stock for instance one-half inch in diameter, there might be` danger of buckling. To avoid such objection the stroke of the rear feeder may be diminished as Amuch as desired,

by means of the adjustment screw Q?. This forms a stop which limits the rearward movement of the feeder P, sothat by adjusting said stop forward the amount of clearance can be reduced to the desired degree. When such adjustment is effected, the stock willI be advanced bythe rear feeder in short steps, -so that the unsupported portion length.

What I claim as my invention is:

l. In a machine ofthe character described, the combination with a sizing die, of main and auxiliary reciprocatory feeders arranged respectively forward and in rear of said die, means for reciprocating said -forward feeder to advance the stock a predetermined amount during each re- `will be relatively short in ciprocation and to draw it through said die, av`

draft connection lbetween said forward and rear feeders for actuating the latter in a forward direction, means for actuating said rear feeder rearwardly, and means for variably limiting the rearward movement of said rear feeder from zero to the full stroke of said forward feeder.

2. In a machine ofthe character described, the

of movement thereof from zero combination with a sizing die, of reciprocatory feeders arranged respectively forward and in rear of said die, said forward feeder normally advancing the stock a predetermined amount and drawing the same through said die, a. draft connection between said forward and rear feeders for actuating the latter in a forward direction, resilient means for returning said rear feeder during the rearward movement of said forward feeder, a lost motionv connection between said draft means and rear feeder, and means for variably limiting the rearward movement of said rear feeder to correspondingly vary the amplitude vtothe full stroke of said forward feeder.

3. In a. machine of the character described, thel combination with a sizing die, of main and auxiliary reciprocatory feeders arranged respectively forward and in rear of said die, means for. reciprocating said forward feeder to advance the stock a predetermined amount during eachreciprocation and to draw it through said die,

a draft connection between said forward and.v

rear feeders for actuating the latter in a forward direction, resilient means for actuating said rear feeder rearwardly, means for locking said rear.

feeder in its forward position to arrest movement thereof, and independent means for variably limiting the rearward movement of said rear feeder from zero to the full stroke of said forward feeder.

4. Ina machine of 4the character described,

the combination with a sizing die, of reciprocatory feeders arranged respectively forward and in rear of 'said die, said forward feeder normally advancing the stock a predetermined amount 'and drawing the same through said die, a draft .connection between' said forward and rear feedadvancing the stock a predetermined amount and 'fdrawing the same through said die, a draft connection between said forward and rear feeders for actuating the latter in a forward direction, resilient means for actuating said rear feeder rearwardly, means for manually advancing said rear feeder against the resistance of said 'resilient means independent of said draft connection and to a position out of operative relation thereto, and ni'eans for locking said feeder in its advanced position. l

6. In a. machine of the character described,

rection, resilient means for actuatingr said rearv feeder rearwardly, means for manually advancing said rear feeder against the resistance of said resilient means and' independent of said draft connection, said means comprising gearing mounted on said rear feeder, a crank handle for operating the same, anda rack "on said frame in engagement with said gearing, and locking means l0 the combinationwithl a sizing die, of reciprocatory feeders arranged respectively forward for retaining said rear feeder in its advanced position.

7. In a machine of the character described, the combination with a sizing die, of a main feeder forward of said die'for drawing the stock therethrough and advancing the same a predetermined amount, an auxiliary feeder in rearof said die for pushing the forward end portion of the` stock therethrough and into engagement with said forward feeder, said die fr ictionally resisting the reverse movement of the stock therethrough when engaged therewith, and auxiliary friction means for resisting the reverse movement of the stock when out of engagement-with said die.

8. In a machine of the character described, the combination with a sizing die, of a main feeder forward of said die for drawing the stock therethrough and advancing the same a predetermined amount, an auxiliary feeder in rear of said die for pushing the forward end portion of the stock therethrough and into engagement with said forward feeder, said die frictionally resisting the reverse movement of the stock therement with said die, and a second manually oper-v movement thereof.

through when engaged therewith, manually operable auxiliary friction means fory resisting reverse movement of the stock before its engageable friction vmeans for resisting reverse movement of the forward portion of the stock after disengagement from said die.

9. In a machine of the character described,

the combination with a sizing die, of main and f a draft connection between said forward and rear feeders for actuating the latter in a forward direction, and means for actuating said rear feeder rearwardly.

10. In a machine of the character' described, the combination with a sizing die, of reciprocatory feeders arranged respectively forward and in rear of said die, said forward feeder normally advancing the stock a predetermined amount and drawing the same through said die, a draft connection between said forward and rear feeders for/actuating the latter in a forward direction, resilient` means for returning said rear 'feeder during the rearward movement of said forward feeder, and a lost motion connection between said draft means and said rear feeder.

11. In a. machine of the character described, the combination with a sizing die, of `main and auxiliary reciprocatory feeders arranged respectively forward and in rear of said die, means for reciprocating said forward feeder to advance the stock a predetermined amount during eachreciprocation and to draw it through said die, a draft connection between said forward and rear feeders for actuating the latter in a forwarddirection, resilient means for actuating said rear feeder rearwardly, and means for locking said rear feeder in its forward position lto arrest 12. In a machine of the character described,

I the combination with a sizing die, of reciprocatory feeders arranged respectivelyforward and in rear of said die, said forward feeder norrear feeders for actuating the latter in a fora draft connection between said forward and 10 rear feeders for actuating the latter in a forward direction, means for actuating said rear feeder rearwardly, means for advancing said rear feeder independent of said draft connection and to a, position out of operative relation thereto, 15

and means for locking said feeder in its advanced position.

14. In a machine of the character described, the combination. with a sizing die, of reciprocatory feeders arranged respectively forward and in rear of said die, said forward feeder normally advancing the stock a predetermined amount and drawing the same through said die, a draft connection between said forward and rear feeders for actuating the latter in a forward direction, means for actuating said rear feeder rearwardly, and means for advancing said rear feeder independent of said draft connection, said means comprising gearing mounted on said rear feeder, a crank handle for operating the same, and a rack on said frame in engagement with said gearing.

15. In a machine of the character described, the combination with a sizing die, of a main feeder forward of said die for drawing the stock therethrough and advancing the same a predetermined amount, an auxiliary feeder in rear of said die for pushing the forward end portion of the stock therethrough and into engagement with said forward feeder, said die frictionally resisting the reverse movement of the stock therethrough when engaged therewith, auxiliary means for resisting reverse movement of the stock before its engagement with said die, and a second means for resisting reverse movement of the forward portion of the stock-after disengagement from said die.

16. In a machine of the class described, a die for sizing stock, a feeder for pushing stock through the die, a feeder for drawing the stock 'from the die, and a draft connection between said feeders independent of the die and including a rod secured to one of saidfeeders and extending freely through the other feeder, an adjustable sleeve on said rod in rear of said other feeder and adapted to move the same forwardly, and a coil vspring sleeved on the rod in advance of said other feeder and operable to move the same rearwardly,

17. In a machine of the class described, a die for sizingl stock, a feeder for pushing stock through the die, a feeder fordrawing the lstock from the die, and a draft connection between said feeders independent of the dieand including a rod secured to one yof said feeders and extending freely through -the other feeder, an adjustable sleeve on said rod in rear of said other feeder and adapted to move the same forwardly, a coil spring sleeved on` the rodvin advance of said other feeder and operable to move the 7U same' rearwardly, and means for holding the said other feeder forward against the tension of the spring so that, said other feeder will not be moved by said sleeve.

18. In a machine of the l.class described, a die 72 for moving stock relative to said die sleeved freefor sizing stock, a feeder for moving stock through said die, a rod secured to and projecting from said feeder past saiddie, a second feeder ly on said rod, and means for actuating the second feeder including a coil spring sleeved on said rod at one end ofsaid second feeder, and an adjustable member on said rod at the'other end of said second feeder.

19. In a` machine of the `class described, a

` die for sizing stock, a feeder for moving stock through said die, a rod secured to and projecting from said feeder pastsaid die, a secondk feeder for moving stock relative to said die sleeved freely on said rod, and means for actuating the secvond feeder including` a coil spring sleeved on said rod at one end of said second feeder, an adjustable member on said rod at the other end of said second feeder, and means for rendering the second feeder inoperative including means for moving the second feeder relative to said rod against the tens-ion of said spring.

20. Ina machineof the class described, a die for sizing stock, a feeder for moving stock through said die, a rod secured to and projecting from said feeder past said die, a second feeder for moving stock relative to said die` sleeved freely on said rod, and means for actuating the second feeder including acoil spring sleevedon said rod at one end of said second feeder, an adjustable member on said rod at the other end of said second feeder, means for rendering the second feeder inoperative including means for moving the second feeder relative to said rod against the tension of saidspring, and means for holding the second feeder against the tension of said spring.

2l, In a machine of the class described, a die for sizing stock, a feeder for moving stock through said die, a rod secured to and projecting from said feeder past said die, a second feeder for moving stock relative to said die sleeved freely on said rod, and means for actuating the second feeder including a coil spring sleeved 0n said rod at one end of saidsecond feeder, an adjustable member on said rod at the other end of said second feeder, and means adjustable into the path of the second feeder for limiting the stroke thereof.

22. In 4a machine of the class described, a die for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through saidV die, and a driving connection from one feeder to the second feeder free of the. die and including a rod xed to one feeder and extending freely through the'second feeder, and anactuator for the second feeder adjustably mounted on said rod adjacent its free Vend.

' in front and in `rear .of

in front and in rear of said die for causing stock to advance through said die, and a driving connection from one feeder to/the second feeder free rod'adjacent its free class described, a die I for sizing stock, two separate feeders respectively of the die and including a rod xed to one feeder and extending freely through the second feeder, an adjustable member on the rod adjacent its free end for actuating the second feeder, and a spring on the rod between said feeders urging the second feeder toward itsy actuating member.

25. In a machine of the class described, a die for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through'said die, and a'driving connection from 'one feeder to the second feeder free of the die and including a rod'iixed to one feeder and having a `lost motion connection with the 4second feeder, and means for limiting the strokeA of the second feeder.

26. In a machine of the class described, a, die for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through said die, and a driving con- 'nection vfrom one feeder to the second feeder free of the die and including a rod fixed to onefeeder second feeder, and an element adjustable into the path of the second feeder to limit the stroke` thereof.

27. In a machine of the class described, a die t and having a lost motion connection with` the for sizing stock, two separate feedersV respectively y in front and in rear of said dieforadvancing stock throughsaid die, and a driving connection between said feeders including a rod xed to one feeder, and extending freely through the second feeder, an actuator for the second feeder on the Y rod at the free end thereof, yieldable means on the rod between said feeders urging 'the second feeder toward its actuator, and manually operable means for rendering the actuator inoperative including a stationary rack, a pinion carried n by the second feeder in mesh with said rack,

and actuating `means for said pinion operable to cause the second feeder to travel along the rack away from and out of the path of said actuator.

29. In a machine of the class described, a die for sizing stock, two separate feeders'respectively in front and in rear vof said die for advancing stock through said die, and va driving connection between said feeders including a rod xed to one feeder and extending freely `through the second feeder,A an actuator' for the second feeder on the rod at the free end thereof, yieldablemeans on the rod between said feeders urging the second feeder toward its actuator, and manually operable means for rendering the actuator inoperative including a. stationary rack, a pinion carried by the second feeder in mesh Awith said rack, and actuating means for said pinion operable to cause the second feeder to travel along the rack to a position' out; of the path of said actuator, and means for locking the second feeder in Said position. f

30. In a machine of the class described, a die for sizing stock, a feeder for moving stock through said die, a rod secured to and projecting from said feeder past said die, a second feeder for moving stock relative to said die sleeved freely -on said rod, and means for actuating the second .feeder including elements sleeved on said rod in front'andin rear of said second feeder, the rear element being non-yieldable and serving as an actuator for the second feeder',^and the forward element being fiexible and urging the second feeder toward said rear element.

10 31.. In a machine of the class described, a die for sizing stock, a feeder in rear Aof said die forA advancing stock, through the die. a feeder in front of said die for pulling the stock through thedie, said feeders-being separate and independent of one another, means fordriving the front feederfandmeans operable by thefront feeder for drivingthe rear feeder including a rod. fixed to the front feeder and having a lost mo tion connection with therear feeder.

32. In a machine of the class described, a die for sizing stock, a feeder in rear of said die for advancing stock through the die, a feeder in front of said die for pulling the stock through the die, said feeders being separate and indefront feeder, and means operable by the front lfeeder for vdriving the rear feeder including a rod fixed to the front feeder and extending freely a member secured to one of said feeders and extending longitudinally of the other feeder, an adjustable element 4on said member in rear of .the 40 second feeder and adapted to move the same forwardly, and means sleeved on the member-inadvance of the second feeder and move the same rearwardly.

34. In a lmachine of the class described, a dieA for sizing stock, a feeder for pushing stock through the die, a feeder for drawing the stock from the die, and a draft connection between said feeders'independent. of the die and including a member securedto one of said feeders and extending longitudinally of the other feeder, an

i adjustableelement on said member in rear of the second feeder and adapted to move the saine forwardly, means sleeved on the member in advance of the second feeder and operable to move the same rearwardly, and means for holding the second feeder' forward against the action of the last mentioned means so that said second'feeder will notbe moved by said adjustable element.

35. Ina machine'of the class described, a die for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through said die, and a driving connection from one feeder to the second feeder free l of -thedie and including a member fixed to one feeder and extending longitudinally of the secoperable to pendent of lone another, means for -driving the ond feeder, an adjustable element on the member for actuating the second feeder, and an abutment for said member carried by and adjustable relative to said element for locking the parts in vadjusted position. 5

36. In a machine of the class described, a die for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through said die, and a driving connection from one feeder to the second feeder free of the die and including a member secured to one feeder and extending longitudinally of the second feeder, a sleeve adjustable on said member in rear of and engageable with the second feeder, and a screw adjustable in said sleeve relative to said member.

37. In a machine of the class described, a'die for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through said die, and a driving convnection from one feeder to the second feeder free of the die and including a member secured to one feeder and extending longitudinally of the second feeder, a sleeve adjustable on said member in rear of and engageable with lthe second feeder, an abutment for said member adjustable relative tosaid sleeve, and a spring sleeved on said member in front of and yieldably pressing the second feeder rearward toward said sleeve.

38. In a machine of the class described, adie for sizing stock, two separate feeders respectively in front and in rear of said die for causing stock to advance through said die, and a driving connection from one feeder to the second feeder free of the die 4and including a member secured vto one feeder and extending longitudinally of the second feeder, a sleeve adjustable on said member in rear of and engageable with the second feeder, and a spring sleeved on said member in Y front of and yieldably pressing the second feeder o toward the sleeve.

39. In a machine of the class described, a die for sizing stock, two separate feeders respectively in front and in rear of said die for advancing stock through said die, and a driving connection between said feeders including a rod xed to one `feeder and extending freely through the second feeder, an actuator for the second feeder on thev rod at thefree end thereof, yieldable means on the rod between said vfeeders urging the second feeder toward its actuator, and manually operable means for rendering the actuator inoperative.

40. In `a machine 'of the character described, the combination with a sizing die, of reciprocatory feedersl arranged respectively forward and in rear of said die, said forward -feeder normally advancing the stock a predetermined amount and drawing the same through said die, a draft connection between'said forward and rear feeders for actuating the latter in a forward direction, means for actuating said rear feeder rearwardly, and means for advancing said-rear feeder independent of said draft connection.

BERKEBIL.

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