US340578A - Machine for making looped-wire staples - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

I. W. HEYSINGER.

MACHINE FOR MAKING LOOPED WIRE STAPLES.

No. 340,578. Patented Apr. 27, 1886-.

. fl i a i 0% m T r x-- ASL TL WITNESSES: INVENTOR 1 (No Model.)

I. W. HEYSINGER.

MACHINE FOR MAKING- LOOPED WIRE STAPLES.

.2 Sheets-Sheet 2.

Patented Apr. 27, 1886.

N. PETERS, Pholo-mmlm Walhinginn. D. C.

UNITED. STATES PATENT OFFICE.

1SAAO \V. HEYSINGER, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR MAKING LOOPED-WIRE STAPLES.

SPECIFICATION forming part of Letters Patent No. 340,578, dated April 27, 1886.

Application filed April 1,1885. Renewed January S, 1886. Serial No. 1P8,045. (No model.)

.To all whom it may concern.-

Be it known that I, Isaac W. HEYSINGER, of Philadelphia, in the county of Philadelphia and Stateof Pennsylvania, haveinvented a certain new and useful Improvement in Machines for Manufacturing Looped or Suspension-Ring Wire Staples, of which the following is a full, clear, and exact description, reference being had to the drawings accompanying and forming a part of this specification.

The object of my invention is to produce a machine which shall take the wire from the spool or coil and convert it into staples suit able for driving into wood, paper, or other material, saidstaples having a projecting ring or loop attached to the crown of the staple proper by a twisted neck, so that the same may not open in the driving of the said staple, in a more perfect and rapid manner than has heretofore been done, the said staple with its penetrating legs, its transverse crown, its twisted neck, and its suspending-loop all being formed from a single and continuous piece or length of wire.

Referring to the drawings, Figure 1 is a plan of the machine, showing the various parts thereof intop view. Fig. 2 is a side elevation showing the machinefrom the side upon which the wire is fed. Fig. 3 is a vertical section upon the line 00 m, Fig. 1. Fig. 4 shows the staple-bending mechanism, taken in transverse vertical section along the line 3/ 3 Fig. 3. Fig. 5 is a partly sectional front view of the drawing and twisting bar audits coacting parts, a modified form being shown in Figs. 1 and 3. Fig. 6 shows a staple as made by my machine, viewed from the front, and having its shoulders y y on the same level and the points of its legs gfy on aline parallel thereto to insure easy driving. Fig. (5" is a modified form of the crown of the said staple adapted to produce the same results. Fig. 7 is a defective staple having its legs 1 g on an oblique line, and also its shoulders 3 3 This staple will tilt in the driving thereof and crush or buckle up. Fig. 8 is a perspective view of a staple such as my machine is con structed to make.

I make no claim to these staples in this application, the same having been claimed by me in another application for Letters Patent now pending, my application as originally filed having been divided for. this purpose.

The lettering in all the figures is uniform. The general operation of the machine may be descibed as follows: The wire (for which purpose I prefer to use tinned Bessemer steel wire of about twenty-one gage, although any suitable size or quality may be used) is fed into the machine, and a suitable length to form a staple is cut off therein. The end portions of this straight stapleblauk being held from bending, the middle portion thereof is drawn forward at right angles to the length of the blank in the form of a bow or loop, and twisted so as to form a loop or ring with a twisted neck. I usually give this neck a twist of one and a half complete revolution. The ends of the staple blank projecting from the twisted neck laterally and at right angles thereto are now sharply bent down, substau-' tially or nearly at right angles to their original direction, so as to form legs, a portion of the original blank lying adjacent to the twisted neck being left to form the crown. The finished staple is now delivered from the machine, and the process repeated continuously so long as the wire is fed in, all the op erations being continuous and automatic.

The process of cutting off the wire may precede, accompany, or follow the process of drawing out the loop, or the bending of the legs may precede the forming of the loop; but the order of the various stages of manufacture above given has been found in practice perfectly successful.

The feeding of the wire into the machine I prefer to accomplish by means of a pair of.

intermittently'moving rolls, which carry the wire between them. It passes thence into a channel across which works the cutting device, which also has an intermittent motion, and is so timed as to be in motion when the feed-rolls are at rest. The wire blank now lies with its ends supported in a pair of grooves opening upward, and its middle portion lying behind a cross-pin extending across and closingthe bifurcated end of a suitably-arranged drawing and twisting bar, which reciprocates at right angles to and opposite the middle of the wire blank and between the grooves in which lie the ends of the wire blank. These grooves are closed upon the upper side by a movable hcad piece extending across both grooves and the intervening space. The draw ing and twisting bar now moves out, sliding and rotating in its bearings, and carrying the middle portion of the wire blank with it, the ends drawing in through the grooves to compensate for the wire being taken up by the loop, and being drawn sharply around the inner and opposite forward corners of the grooves, which, by the covering of the headpiece, have become closed channels. The moment the bifurcated head of the drawing and twisting bar leaves its place between the grooves it is followed by the staple bar or anvil, upon which the staple-legs are to be bent, and which said staple-bar previously lies behind, being pushed backward by the nose or bifurcated end of the drawing and twisting bar, being held up against it firmly by a spring. The end of this staple bar or anvil passes under the wire as it is being drawn out into a loop, and supports it before the twisting begins. As the twisting has a tendency to lift one side of the wire, the staple-bar is provided with a projecting and overhanging thumbpiece, which is placed a little more than the thickness of the wire above it, and which prevents the displacement of the wire and holds the two sides horizontal while the neck is being twisted. As soon as this latter operation has been accomplished, the motions of the drawing and twisting bar cease. The ends of the wire blank have now been drawn partly inward through the grooves in proportion to the length of wire consumed in the making of the loop, while the middle portion is supported by the staple bar or anvil beneath. The grooved side pieces now sink vertically, so as to leave the ends of the wi"e projecting horizontally from the sides of the anvil and under the head-piece,which does not descend with the grooved side pieces. \Vhen these side pieces have descended sufficiently to give clearance for the legs, the bifurcated head piece or sta ple-former now descends astride the anvil and suddenly drives down the legs at right angles to the part resting upon the staple bar or an vil in the middle, the bifurcated arms thereof being fitted to embrace the sides of the same. Should it be found that the staple-legs, when formed, are not at the proper angle with reference to the loop of the staplethat is, bent backward or forward too much-t-he lower faces of the bifurcated sides of the staple-forming bar may be smoothly faced off from front to rear on an angle, which will slip the legs while being bent either forward or backward, and so bring them to any angle desired with reference to the loop in front, either acute, right, or obtuse. As the bifurcated staplebar descends, holding the staplelegs firmly compressed against the sides of the anvil, it reaches a point where the bifurcation is gradually widened, so that the staple-legs are freed from their compression. The pin of the drawing and twistingbar, around which the loop of the staple now passes, is then slipped or withdrawn from its place, whereby the stapleloop is left unsupported and drops, carrying with it the staple, now loosely held, or not at all, by the sides of the bifurcated bar alongside the anvil, and the machine is ready to have its parts replaced, as at first,'to repeat the operation with another length of wire.

The machine as above generally described, if run at a proper speed, will make from thirty-six thousand to forty thousand staples per day of ten hours, without care or attention, if kept fed with wire and in good condition.

Referring to the drawings, A, Figs. 1 and 2, is the foot of the machine, elevated sufficiently to give space beneath for the lower segment of the driving pulley and cams, and for the staple-counting mechanism, should such be used. At its upper portion this foot A is expanded to form the bed of the machine, and is cut away wherever required to accommodate the mechanism. At B this expanded foot or bed becomes a sleeve, (see Fig. 1,) which carries within it the driving-shaft G which actuates all the parts of the machine. At 0 is seen the main driving-pulley. Where a loose pulley is also used to enable the machine to be thrown out of gear, its place is indicated by the dotted outline O, the drivingshaft 0 in such case being prolonged farther to the right.

D is a cam-wheel rotating with the drivingpulley O and having a cam-groove, d, in the side, as shown in Fig. 2.

E is a double grooved cam wheel having one groove on its periphery e and one on its side 6.

At F the driving-shaft G is terminated by a fiat-faced head, to which is attached (see Fig. 2) an eccentric cam, G, of peculiar shape, the object of which is to accelerate the feeding of the wire at the proper time, an ordinary intermittent feed not accomplishing its work in time for the subsequent operations due to the rotation of the drivingshaft. Against the periphery of this eccentric cam G rotates the friction-roller H, being held in constant contact with the variable periphery of the same by the tension of the coiled spring 9. This friction-roller H is mounted upon the end of a rock-shaft,l, which is pivoted (through the center of the lower feed-roll, L) to the bed of the machine. Partway along its length this rockshaft I carries a pawl, J, held up byaspring, so as to constantly engage with the teeth of the ratchetwheel K, (see Fig. 2,) and rotate the same upon the common center of the ratchet-wheel K, the lower feed-roller, L, and the rock-shaft J. There are a pair of these feed'rolls, L and L, which rotate together by the aid of toothed gear-wheels, (partly broken away in Fig. 2,) which are geared together.

The wire M, from which the staples are to be formed, (see Fig. 2,) passes over a small roller at the left of the machine, (not shown,) which is mounted upon the top of a spring-arm to play to and fro and take up the slack of the IIO wire from the coil or spool, which is placed farther to the left. The wire enters the machine between the feed'rolls L and L, being firmly held by the same, the surfaces thereof having opposite grooves to receive and hold the said wire. One of the said feed-rolls, L or L, is provided with a friction spring to arrest its forward motion when the throw of the rollers and the feed of the wire are completed for each staple length or blank. As will be seen, as the driving-shaft rotates the wire will be intermittently fed into the machine, the eccentric outline of the cam G greatly accelcrating the feed at one particular point of its rotation, the feed being at rest at all other times. The wire, after leaving the feed rolls L L, enters a guide-channel in the block S, which is firmly fixed to the machine. It thence passes through a slot in the wire-cutter M (see Fig. 4,) said slot having a cuttingedge adapted to shear off the wire whenever the said cutter M is moved at right angles to the course of the wire, the same being adapted to move to and fro in that plane. The tension of a spring, m, (see Fig. 1,) holds the cutter M" up to place, so that the wireslot is kept open. After passing through the cutter, the wire enters a closed channel formed as follows, (see Fig. 4:) A vertically-reciprocating plunger, R, is retained and guided in the vertical channel S, which forms a part of the frame of the machine. The flat forward side of the plunger R is cut away for a part of its length from beneath, so as to admit the loose block R, which plays up and down in the said cut-away portion of R. (See Fig. 3.) The lower part of the plunger It, below the block R, is divided vertically from front to rear into two forks or halves, (see Fig. 4,) and the lower part of the movable block 1% is also bifurcated to correspond. The upper surface of the lower part or offset, It, of the plunger R is grooved transversely along the line upon which the wire M travels, on both sides of the bifurcation, and the loose block R, which rests by gravity (see Fig. 4) upon the upper surface of the said offset of R and over the grooves for the wire, forms a closed channel to receive the wire when fed in from the rolls L and L, except where the bifurcation divides the plunger R and the block E into two parts. The wire, after passing the cutter and before it is cut off, enters this grooved channel and passes entirely through the same, so as to lie across the bifurcation. In passing across this bifurcation the wire M is guided by the opening in the head ofthe drawing and twisting bar V, as will be explained, and which in turn is actuated by the cam-groove 6 upon the periphcry of the canrwheel E, while the plunger 1% and its adjacent parts derive their motion from the side groove, 6, of the same cam-wheel E.

The rotation of the drawing and twisting bar V is accomplished by the cam-groove (Z of the cam-wheel D, acting through the medium of a rack,VV and an elongated sliding pinion, V upon the said bar V. (See Fig. 1.) The the said rack.

said drawing and twisting bar V is provided at its forward end with a pair of grippingjaws, and with let-off mechanism for releasing the finished staple at the proper moment. Fig. 5 shows one form of this bar V, which may be otherwise modified in its gripping-jaws to accomplish the same results. It consists of a rod provided with a sliding pinion, Viwhich engages with and is rotated by the rack WV, the said pinion V being long enough to play to and fro upon the said rack V to the full extent required for drawing out the loop of the staple without becoming disengaged from At its forward end the bar V is slotted longitudinally, and a latch,V held down by a spring, is provided with a pin which lies across the slot or bifurcation, and closes it until, by the retraction of the bar V in its bearing, the lifting-leverof the latch V is drawn into the collar of the bearing and the latch lifted, when the pin is withdrawn from the bifurcation, and the loop of the staple, which has been formed around the pin, is released, the staple dropping into a receptacle beneath.

In the form of drawing and twisting bar shown in Figs. 1 and 3 the whole length of the bar is split longitudinally, so as to form halves which play upon each other, being held'in place by the bearings in which they travel. The forward end of the bar is bifurcated, one

branch of the bifurcation belonging to each half of the bar. ()ne of these halves carries a pin, which extends across to and against the opposite side of the bifurcation. \Vhen these halves are slid upon each other in their bearings, the pin overlaps and projects,'and theloop of the staple, which has been formed around the pin, drops off, as in the other form above described. These halves are held in place upon each other by the arched spring Vflwhich is seated at each end in an opposite segment of the bar V. The cam-lever U, Fig. 1, has its center of motion in the middle of its length and derives its movement from the cam-groove 6. At the opposite end it actuates a collar, a, attached by the screw it to one half the bar V. (See Fig. 3.) The otherhalf of carries another collar, a attached to its halt segment by the screw u, and connected with it is the short armed lever U.

suddenly compress the spring V and slide one segment of the drawing-bar upon the other, so as to make the pin slip off from the face of the opposite side of the bifurcation and the loop of the staple drop therefrom, the pin at this point of the operations being in position with its point downward. The canrgroove d, which rotates the bar V, it will be seen, (see Fig. 2,) is a simple groove of two diameters centered on the driving-shaft.

To gain speed and time, the cam-lever W is made with an elbow (see Fig. 2) and rocks uponthe fixed arm W, which is a part of the frame of the machine. The short arm which forms the bottom part of W increases the throw of the long arm above, which carries the pitman or connecting-rod V and communicates motion to the rack which travels forward and back ward in a groove in the bedplate of the machine, and rotates the pinion V and the twisting-bar V. The motions of the rack are simple, merely forward for less than one-eighth of a revolution, then a rest, and then return, with another rest afterward. During one of these rests the wire is fed into the machine and cut, and during the other the pin is released and the staple delivered. The longitudinal motions of the bar V are more complex. In its normal position the longitudinally-slotted head occupies the bifurcation of the plunger R its slot being horizontal and the pin vertical, so that the wire, when fed from the feedrolls through the cutter, passes along the first groove in the bifurcation of R. thence through the slot in the bar V and behind the pin, and thence along the opposite groove of The wire is now ready to be out. On a prolongation to the left of the length of the bar V (see Fig. 3) is another oppositely-moving and horizontal bar, T.

Asshown in Fig. 3, the bar V is not yet in its proper place, being shown in position for delivering the staple. It requires to be thrust to the left. In doing so, it will push back the bar T against the tension of the spring t by impinging, with the head of V against the head of T, and will occupy its place between the bifurcated sides of R, now occupied (in Fig. 3) by the head of the bar T. The opposite heads of the bars V and T will thus for a certain distance abut against and move simultaneously with each other, so that if one is withdrawn the other will immediately take its place. The bar T travels and is guided in a horizontal channel, S (see Fig. 3,) which is attached to S, and forms a part of the frame of the machine. The channel S at the side occupied by the wire cutter M M is slotted laterally for a short distance, and a pin, T projects through the said slot from the recip' rocating bar '1, and enters a corresponding transverse slot in the rear portion of the cutting-bar M. This cutterbar M" M* is held up to place by the U spring m, Figs. 1 and'2, so as to keep the passage in the blade fully op en to receive the wire, except when pushed backward by the rearward travel of the bar T through the pin T impinging against the rear portion of the slot in the part M whereby the wire is sheared off. The operation is as follows: The slotted end of the drawing and twisting bar V abuts against the head of the reciprocating bar T, and pushes it backward against the tension ofthe spring 15. The lateral pin T is pushed back in the slot in the cutter-bar M but not so far as to move the cutter, which is now open, and the grooves to receive the wire are covered by the block R. The end ofthe drawing and twisting bar V occupies the bifurcation in the staple-bar R, the parts beingintheposition representedinFig.4. The wire is now fed in by the action of the feedrolls L L. A slight deflection ofthe cam-groove 6 (see Fig. 1) to the right through the lever U moves the bar Vto the left. The pin which closes the bifurcation of the bar V moves away from the wire behind which it lies, and as the bifurcation is made long enough in the bar V the wire still remainsin its previous position, stretched across the slot in the plunger R; but this movement to the left of the bar V pushes still further backward the horizontal bar T and its projecting pin T The pin T however, which had already been nearly in contact with the end of the slot in the cut ter-bar M", now impinges against the end of the slot and carries the cutter bar itself backward, and so shears off the wire by the blade at its forward end. As soon as this is accomplished, the bar V returns to its former position through the reversal of the deflection in the cam-groove e, and thewire now lies cut off to the proper length and ready to have its middle portion drawn out into a loop by the further motion of the drawing and twisting bar V along its axis to the right. The bar V, actuated by the lever U, deriving its motion from the cam-wheelEth rough the cam-groove R, (see Fig. 1,) traverses in its hearings to the right and draws out the middle portion of the wire blank by the pin which closes the end of the bifurcation. The wire is thus drawnhard around the front corners of the grooves in the offset R of the plunger R, (see Fig. 4,) which furnish all the friction required to make a firm and even loop. The ends of the blank also travel inward as the loop is drawn forward. As the bar V retreats, it is followed by the bar T by the action of the spring it, so that as soon as the head of the drawing and twisting bar has cleared the bifurcated slotin the plunger R R the head of T has taken its place, the wire resting upon its top surface as the loop is being drawn forward. The head of this bar '1, which is made flat on its upper surface, forms the anvil upon which the legs of the staple are bent down by the descent of the bifurcated staple forming block R, as will be shown hereinafter. The bar T is shown in cross-section at its forward end in Fig. 4. Over the top surface of the anvil portion of the bar loop by the action of the cam \V, set in motion by the cam-groove d, the connecting-rod W, and through it the rack W are moved forward, and the pinion V and the drawing and twisting bar V are rotated. The open loop being held by the bifurcation in the front end of the bar V, which is closed by its cross-pin, and the sides ofthe wire-blank being held by the grooves in R and the covering-block R and the middle of the loop now about to be twisted being supported beneath by the anvil T and covered by the thumb-piece T, Fig. 4, when the bar V is rotated, as before described, the sides of the loop will cross each other, and as it is continued will be formed into a hardtwisted neck or stem. I usually for simplelooped staples give the neck a twist of three half-turns, which brings the sides of the crown out at the proper points and makes a secure twist. When I twist the whole loop into a stem to formahook,orfor other purposes,which I sometimes do, I rotate the twisting-bar by means of the rack and pinion to any number of turns desired. I also sometimes setthedrawing and twisting bar V at an oblique angle to the axis of the wire, instead of at right angles,

- and sometimes place it nearer to one end than to the other of the staple-blank, so that when finished the staples will have their stems and their loops nearer one end of the crown or top surface of the staple than the other, and I sometimes bend the legs upon the same plane as is occupied by the loop and twisted neck backward instead of downward, thesefeatures being such modifications as could be made, by any good mechanic upon the machine as described, to suit special requirements. The lever N, Fig. 2, now moves by the operation of the canrgroove e, and acts through the pitnian Q, at r, Fig. 3, to force the plunger R down in its channel. The lower part of the said R (see Fig. 4) forms an offset, R in the upper surface of which are the transverse grooves for the wire blank. As the plunger R sinks, it clears the ends of the wire, and as the grooves in the offset R are closed above by the loose block 1% the loose block now rests by its bifurcated sides upon the free ends of the wire blank while the plunger R and the grooved offset R are descending; but when the latter have sunk so far that the ends of the wire,-if suddenly bent downward, will not strike the top of the grooved offset R the top shoulder or offset of It, corresponding to the loweroffset, R3, (see Fig. 3) will strike in its descent upon the top of the block R now suspended upon the projecting ends of the wire, and will carry the bifurcated sides of the block R suddenly down with it, thus bending down the ends of the wire alongside the anvil T, and thus form staple-legs.

In order to release the finished staple, and allow it to drop from the machine, I make the bifurcated sides of the block R, which forms the staple-legs upon the anvil T, parallel and closely fitting to the sides of the anvil T fora certain distance from their extremities, and then widen the bifurcation, so as to give the finished staple-legs more room.' They are thus loosely contained between the expanded sides of the bifurcation of R and the sides of the anvil-bar T, from which they spring apart slightly by their own elasticity and drop by their own weight when the pin which holds the loop in the bifurcated end of the bar V is removed.

To insure the release of the staple-legs when all the above-described operations'have been completed, except the releasing of the loop of the staple from its pin, the cam-groove e of the cam-wheel E, Fig. 1, is slightly deflected to the left, which moves the bar V to the right sufficiently far to pull the staple out from the bifurcation of the bar or block B, so that it is now held simply by the cross-pin in the bifurcation of the bar V. This retraction of the bar V in its bearings in the form of bar shown in Fig. 5 withdraws the trippinglever into its collar and withdraws the pin. In the form shown in Fig. 1 this further movement causes the armU of the lever U to strike the opposite side of the lever U and through it slide one-half the bar V with one side of the bifurcated end upon the other, and the projecting half containing the pin, which now extends point downward, will uncover the end of .the pin, and the staple will drop freely into a receptacle beneath. As the driving-shaft C re -volves, it will repeat all the operations above described in a continuous series, and so on indefinitely, forming a finished staple at each revolution of the shaft from a coil of wire.

While I describe the operations of drawing out the loop and of twisting the neck as successive ones, I sometimes, especially where a twisted neck of many turns isrequired, perform the operations in whole or part simultaneously. I also sometimes omit the twisting operation entirely where a simple openlooped staple is required.

IIO

In Figs. 6, 6, and 8 I show forms of the staple which this machine is adapted to make; but I do not claim these staples as a part of this invention, the same having been claimed in a separate application for Letters Patent which I have made in the United States Patent Office, and which constitutes a division of my application as originally filed on the 3d day of August, 1882.

Having now described my inventiomwhat I claim, and desire to secure by Letters Patent, is-

, 1. In a machine for manufacturing loopedwire staples with twisted necks, the combination of mechanism for feeding the wire, cut ting it into lengths in the machine by a suit ably-adapted cutter, drawing the middle portion of the length of wire out laterally into a loop by a transversely-acting draw-bar, and twisting the neck of the said loop by rotating the said draw-bar, bending down the ends of the wire blank to form legs by a suitable staple-form1ng plunger, and afterward releasing the completed staple, the whole constructed to operate substantially as described.

2. I11 a machine for making wire Staples, in combination with mechanism for feeding and cutting the wire into lengths to form staples and bending down the legs thereof, a transversely moving, sliding, and rotating drawing and twisting bar adapted to draw out a portion of the said staple-length transversely and form the same into a loop or ring attached to the said staple by a twisted neck integral therewith, substantially as and for the purpose described.

3. In a machine for making wire staples, in combination with mechanism for feeding the wire into the machine and cutting the same into lengths, a loop forming bar adapted to seize the middle part of said length of wire and draw the same out transversely into a loop, together with a suitable staple-forming plunger adapted to bend down the legs of the said staple-length upon a suitable anvil beneath, substantially as shown and described.

4. In a machine for making loopedwire staples with twisted necks from a single continuous length ofwire, the combination ofdriving-shaft C, cams (I, c, e, and G, cam-levers \V, U, N, and I, or their equivalents, intermittent feed -rolls L L, wirecutter ME, bifurcated staple-forming block R, anvil T, transversely moving drawing and twisting bar V, and rack and pinion to rotate the said bar \V* V", or their equivalents, the whole constructed to operate substantially as hei ein shown and described.

5. In a machine for making looped-wire staples, the drawing and twisting bar V, having gripping and releasing jaws V V, bearings V V, in which the said bar V is adapted to slide and rotate, and mechanism for sliding and rotating the said bar V in said bearings, substantially as and for the purposes herein shown and described. v

G. In a machine for making looped-wire staples, in combination with the wire feeding and cutting mechanism, a wire-guiding block, R, having transverse grooves across the upper surfaces of the bifurcated sidrs thereof to receive the outer portions of the length of wire, 50

and a drawing-bar adapted to seat itself between the said bifurcated sides of R and grasp and draw out into a loop the middle portion of the said length of wire while the ei'ids thereof are held in the grooves from displacement during the operation of drawing out the loop, substantially as described.

7. In combination with the wire-receiving grooves in the upper surface of the offsetblock R, opening upward, the cap or covering block 1%, adapted to close the grooves from above and prevent the upward displacement of the wire from said grooves during the movements of the draw-bar V, substantially as de scribed.

S. In combination with the drawing and twisting bar V, the anvil-bar T, which abuts against the head of the said bar V when the same is seated between the bifurcated sides of It It, and moves forward to take the place of the head of the said bar V when the same is withdrawn, so as to form an anvil, around the sides of which the staplelegs y y are to be bent down by the descent of the bifurcated block It, substantially as described.

9. The anvil-block T, in combination with the drawing and twisting bar V and the wireholding grooves in the block B", said anvilblock T having an overhanging thumb-piece, T, to prevent the lifting of the side of the staple during the operation of twisting the neck of the same, substantially as described.

10. In a machine for making looped-Wire staples, in'combination with the drawing-bar V, the bifurcated stapleforming bar or block R, reciprocating vertically in a slotted portion of the plunger R, in which it is adapted to move freely, being limited below by the transverselygrooved offset It and above by the offset at the head of It, corresponding thereto, and the anvil T, seated between the bifurcated sides of the said block R and said offset B,

substantially as and for the purposes set forth.

IS AAC IV. HEYSINGER.

\Vitnesses:

J. LOREN HEYsINcnR, M. B. FENNINGER.

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