US334909A - thomson - Google Patents

Description

3 Sheets-Sheet l.

(No Model.)

.E. NN 0I H SC A mM HE Tm L n0 -;rI m E nm d x M,... m h L y M N xm.. m. w. u ...u m {UWV/f .u QN u .L 9.. 0 0u.. .ww M TN dmm. 3

N. PETERS. Phuwmhogmpher. washingmn. D. C.

(No Mode1.) 3 Sheets-Sheet 3.

J. THOMSON. STAPLB MACHINE.

No. 334,909; Patented Jan. 26, 1886.

. ter it is formed to astaple. Fig. 7 is a detached ter, showing modification of the same.

i ,produce each staple are as follows: First, to feed to the required shape.

Nrrnn Tarts :After lirica.

STAPLE-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 334,909, dated January 26, 1886l Applicationlcd May 14,1885. Serial No. 165,475; (No model.) Patented in Belgium March 24, 1815, No. 68,290; in England March 25, 1885, No. 3,852, and in France March 25, 1885, No. 167,869.

To all whom it may concern.-

Be it known that I, JOHN THOMSON, of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Staple-Machines, of which the following is a specification.

This invention refers to automatic machines for producing staples from wire or rods, the staples being of that class in which barbs are formed in the prongs, and the ends of the prongs are beveled to form a cutting-edge and deiiecting angle.V r

The object of this invent-ion is the production of a machine which shall be capable of the highest speed of operation, while being simple in its movements, easily understood and operated, durable, and convenient to adjust or reair. p rFhe fundamental principle underlying the construction and arrangement of this machine is that all of its movements are continuous rotary actions; -hence I find but one practicable limit to its speed-namely, the duty required of the cutting and forming dies.

In consequence of avoiding the employment of all reciprocating movements, the machine operates smoothly, without shock or jar, is simple to construct, is easily understood, and' can be operated with ordinary skill.

In the accompanying drawings, forming part of the specification, Figure lis a side elevation in which the side frame is removed. Fig. 2 is a vertical transverse section on line D, viewed in the direction of arrow i. Fig. 3 is a horizontal section and top plan view on line R. Fig. 4 is a back elevation in partial section. Fig. 5 is a detached detail side View, enlarged, showing construction of cutter. Fig. 6 is a similar view in transverse section on line C, also showing the blank just before and afenlarged end View of wedge and modification of same. Fig. 8 is a detached View of thccut- The order and conditions of operation to the wire; second, to form the barbs and bevels and separate the blank, third,to bend the blank As will hereinafter be seen, the conditions of forming the barbs and bevels and separattherefore, the arcs 7 8 of ing the blank are really executed at and by a single action; hence there are but three distinct operations required for the production of each staple.

The several conditions will be described in the order above named. The wire l, Figs. 2 and 3, is conducted by any convenient means to the grooved friction wheel or roll 2 and feed wheel or roll 3.

In the present illustration the mechanism is arranged to produce two staples during each revolution of the driving-shaft 4; hence there are two feeds and two periods ofrest to the wire. As it is more convenient to keep all of the rates of motions alike, the feed-wheel is made with two sections of its periphery, 5 6, cut away. During each complete revolution, greatest radii will bite the wire between the friction-wheel and force rit through the machine until its end impinges against the stop-piece 9. IThe length of the arcs are such that they will insure a complete feed, slipping slightly upon the wire before releasing its bite. The feed wheel or roll is mounted upon a shaft, 10, journaled in the eX- tension l1, motion being imparted to it directly from the driving-shaft by t-he pair of bevel-gears 12 18, attached, respectively, to the driving-shaft and feed-wheel shaft. The friction-wheel is pivotally mounted at 14. upon a lever, 15. The said lever is journaled at 16 to the frame of the machine. A spring, 17, shown only in Fig. 2, acts between the rigid extension 18 and the bearing 19 of the lever, the action of the spring being to hold the lever upto the stop 20. The power of this spring and the relative adjustment of the stop and the biting-surfaces of the driving and friction wheels'are such that an ample degree of friction is insured to feed the wire,I but it will be seen that the spring will yield under any unevenness in the wire, and that when the end of the wire reaches the stop and the face of the driving-wheel slips, the friction will not be destructive on the biting surfaces in consequence of the spring yielding the instant its maximum of resistance is reached. On the driving-shaft is mounted a spur-gear, 21, which transmits its motion through a similar gear, 22, of like diameter,

mounted on the driven shaft 23. On the said shaft is also secured the male shearingdies or cutters 25.

FiXedly secured to the base or main body of the machine is the female shearing-die 26, having a transverse slot, 27, through and in which the wire is passed and held. The form of the cutting portion of the dies is such (see Fig. 6) that the barbs are cut on the end of the blank and the contiguous end of the wire, the center tooth of the cutter 28 being elongated sufficiently to fully cut the wire asunder. The

said tooth is'also formed to produce in the act.

of separatingthe desired bevels; hence as the cutter in its revolution passes the wire it is barbed, beveled, and separated, the blank thus severed being sustained by the cheeks 29 30.

The completing operation is to bend the blank to the desired form. This is accomplishedimmediately the blank is severed by means ofthe disk 3l, mounted on the driving-shaft, which carries projecting from its periphery two formers, 32 33. .Each is relatively so timed as to immediately follow upon the action of the cutter, to strike the blank and force it between the cheeks, from when ce it drops a nished staple.

Besides the advantage of employing rotary movements for the several operations, there are others of hardlyless importance, of which the chief is the effect of the rotary thrust upon the wire when cutting the barbs and separating the blank.

In machines of this class heretofore employing reciprocating movements for the cutting action there is aconsiderable tendency to twist the wire, and particularly to flatten the side of the wire opposite the side acted upon by the cutter, in consequence ofthe thrust being in the same plane as the grooves in the female die, causing the metal to rather swell upward under the compressive action of the cutter, and hence flatten against the fiat portion of the slot. In the circular cut, however, it will be seen that even were the face of the cutter in a line coincident with the center of the disk, or slightly at an angle thereto, as seen in Fig. 5, the effect ofthe blow is as indicated by arrow 36; hence tending to force the metal downward against the round bottom of the slot and separating the wirewith but little or4 :no flattening to appear on the sides of the prongs of the staple.

lt is evident that by properly shaping the angle of contact between the face of the cutter and the wire any desired effect may be produced by the circular action, either to lift or to depress the wire in the slot.

In machines of this character, even when the very best material is used and t-he highest degree of accuracy is put into the Workmanship of its parts, the severe strains to which they are subjected and the great rapidity and vast number of shocks sustained makes the matter of accessibility of the different parts for repair or renewal and the absolute rigidity of t-he Working parts a matter of great importance.

It will be observed that thcseveral parts of this machine are disposed with a view to the greatest degree of compactness and rigidity, and that either the driving or the driven shaft may be removed,with its gear and disk complete,by simply detaching the half boxes 37 38.

To sharpen the cutters-which is of course frequently requiredthe arrangement is such that no portion of the machine proper requires to be changed or removed. This is effected by securing the cutters, in such manner as to be removed and replaced without affecting their relative adjustment on the disk, in the following manner: The side of the disk is recessed at its outer surface, as shown in Figs. 2

same as that of the inner surface, 39, ofthe re' cess. The face of the cutter 44 is formed to 'tit the wall of the disk at 52, and the cutter is secured against displacement sidewise by the rabbet ljoint 53. The inner portion of the recess between its walls is wider than the outer portion. The cutter is now finally locked in position by the wedge 43, which acts between the cutter and the wall 54, in either or both of which it is rabbeted to prevent side displacement. The wedge may be secured in position by the screw, as 55; but l prefer the mode shown at 42, in which the edge of the wedge is simply upset over the face of the disk. To remove the cutter, the upset edge or burr is simply filed or chipped off, when the wedge may be driven back. To sharpen the cutter, the face is ground parallel. It will now be seen that when all are replaced in position the wedge will advance farther than before, in consequence of the reduced thickness, and may be again upset, and that the actual cutting-edge of the cutter has again been brought to the exact relative position which it occupied before being ground. This adjustment, furthermore, cannot be disarranged so long as the face of the cutter is ground with even approximate accuracy. It will now be comprehended that the shock of cutting and separating the wire will be borne by a practically solid structure, and which by at 48, partially forming, and the third at 49,'

finally-completing the formation of the angles, by a succession of cuts. All may be sharpened as in the iirst instance. These sections being varranged one behind the other and soas to make deeper cuts successively, it is evident IlO that the force necessary to mak e all the required cuts is extended over a greater arc of the circle through which the cutter passes, and the shock or jar caused by the sectional cutter is not so severe as when all the cuts are made at once.

I claim- 1. In a stapleforming machine, the wirei'eeding mechanism consistingin the combina tion ofa feed-roll having portions cnt away, a friction-roll, a pivoted lever on which the roll is mounted, and a spring drawing on said lever, substantially as described.

2. In a staple-forming machine, the combination of a grooved feed-roll having cutaway portions, anot-her grooved feed-roll, a pivoted lever carrying one of the feed-rolls, and a spring connected to the frame of the machine and constantly drawing upon said lever, substantially as described.

3. In a stapleforming machine, the combination of a stationary female shearing-die and a rotating male shearing-die mounted on a disk, the dies being arranged to sever the blank and simultaneously form bevcls and barbs in one end of the blank and the contiguous end of the wire, substantially as described.

4. In a staple-forming machine, the combination of' the stationary grooved female die, a rotary disk mounted on ashaft and carrying a male die, a rotating former mounted on another shaft, and a continuously-operating in-l termittent feed, substantially as described.

5. In a staple-forming machine, the com bination, with a female die having a roundbottom groove or slot with the sides at right angles to the cutting edge, of a male die co-V operating with the female die and means, substantially as described, whereby the latter approaches the female die at an angle to the plane of the-groove therein, so that the thrust ofthe male die tends to force the metal downward against the bottom of the groove, as and for the purpose set forth.

6. In a staple forming machine in which all the motions are rotary and continuous, the combination of a continuouslysrotating intermittent feed, a xed female die, a rotary male die, erate in quick succession and from a single driving-shaft, substantially as described.

7. ln a staple-forming machine, a cutter consisting of a section ot' a ring the outside contour of which is formed on different planes for cutting the barbs and separating the wire, substantially as described.

8. In a staple-forming machine, the combination, with a slotted disk, of a cutter consisting of a section of a ring having the desired contour for forming the barbs and cutting the wire, the said section being relatively adjustable to the disk by which it is carried, substantially as described.

9. In a staple-forming machine, the combination, with a slotted disk, of a cutter consisting of a section of a ring which is adjustable relative to the disk, and having a central projecting cutting-edge to sever the blank, and side cutting-edges to form barbs in the blank and contiguous wire, substantially as described.

10. In a staple-forming machine, the combination, with a disk, of a cutter formed ot' a section of a ring having the desired contour for forming the barbs and cutting the wire, and the wedge for locking the cutter in the disk, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN THOMSON.

Witnesses:

JAs G. Coornn, ALFRED FARRAR and a rotary former, all arranged to op-

Images