US831109A

US831109A - Wire-nail machine.

Info

Publication number: US831109A
Application number: US27460505A
Authority: US
Inventors: Herman E Schnabel
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-08-17
Filing date: 1905-08-17
Publication date: 1906-09-18
Anticipated expiration: 1923-09-18

Description

HITS-SHEET 1.

PATENTED SEPT. 18, 1906.

H. E. SCHNABEL. WIRE NAIL MACHINE.

APPLICATION FILED AUG. 17. 1905.

rm: NORRIS PETERS cm, vasnmurcu, n. 5',

No, 881,109. PATENTED SEPT. 18, 1906. H. .E. SGHNABEL. WIRE NAIL MACHINE,

APPLICATION FILED 11116.17, 1905.

6 SHEETSSHEET 2.

n4: NORRIS PETERS co., wAsumaraN. D c.

No; 831,109. PATENTED SEPT. 18, 1906.

H. E. SGHNABEL.

WIRE NAIL MACHINE. APPLICATION FILED AUG. 17, 1905.

6 SHEETS-SHEET 3.

rut NORRIS PETERS cm. wAsHmomN. n. o

PATENTED SEPT. 18, 1906.

H. B. SCHNABEL.

WIRE NAIL MACHINE. APPLICATION FILE-D AUG. 17. 1905.

8 SHEETS-SHEET 4.

PATBNTBD SEPT. 18, 1906.

H. E. SOHNABEL.

WIRE NAIL MACHINE.

APPLICATION FILED AUG.17, 1905.

6 SHEETS-SHEET 5.

a "an: ca, wuumamn,

PATENTED SEPT. 18, 1906.

H. E. SOHNABEL.

WIRE NAIL MACHINE.

APPLICATION FILED AUG.17, 1905.

6 SHEETS-SHEET 6.

"lul -mun" UNITED STATES PATENT OFFICE.

WIRE-NAIL MACHINE.

Specification of Letters Patent.

Patented Sept. 18, 1906 Application filed August 17, 1905. Serial No. 274,605.

To (Z6 whmn it may concern.-

Be it known that I, HERMAN E. SCHNABEL, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Wire-Nail Machinc s, of'which the following is a specification.

This invention relates to wire-nail machines, and has for its object to provide an automatic mechanism which shall be compact, strong, simple, and self-contained, and by means of which wire nails may be automatically and continuously manufactured from a continuous wire as it is drawn from the reel or coil, the machine being of a rotary character and adapted to be run at a high speed, so as to insure a large output Without affecting the quality thereof.

To these ends the invention consists in certain novel features, which I will now proceed to describe and will then particularly point out in the claims.

In the drawings, Figure 1 represents a front elevation of a machine embodying my invention. Fig. 2 is a side elevation of the upper portion thereof, comprising the straightening, feeding, and cutting and pointing mechanisms. Fig. 3 is a rear elevation of the portion of the structure shown in Fig. 2. Fig. 4 is a central vertical sectional view of the lower portion of the machine, the straightening, feeding, and cutting and pointing mechanisms being omitted. Fig. 5 is an enlarged detail side elevation of the cutting and pointing mechanism. Fig. 6 is a detail sectional. view taken on the line 6 6 of Fig. 5. Fig. 7 is a detail face elevation of one of the cutting and pointing wheels. Fig. 8 is a detail view, in inverted plan, of the upper revolving disk, which carrics the nail-blank chutes.

Fig. 9 is a detail plan view of the revolving disk or wheel which carrics the nail-blankgripping dies, one pair of said dies being shown in place therein. Fig. 10 is a dctail plan view, partly in section and partly broken away, of the rotating part which carries the heading-dies. Fig. 1 1 is a plan view, partly in section, of the base of the machine, showing in full lines the cam which operates the heading-dies and indicating in dotted lines the relative position of the cam which operates the nail-blank-gripping dies. Fig. 12 is a detail plan view of the cam which forces outward the nail-blank-gripping dies, the relative position of the cam which withdraws said dies being indicated in dotted lines. Fig. 13 is an inverted plan view of the device. Fig. 14 is a detail sectional view through the upper portion of the machine, taken on a line corresponding with the line 14 14 of Fig. 9. Fig. 15 is a detail plan view of the inner portion of the structure shown in Fig. 9. Fig. 16 is a detail plan view of one of the segments of the outer portion of said structure detached. Fig. 17 represents in end view and in partial plan one of the stationary nail-blank-gripping dies. Fig. 18 represents in end view and in plan one of the removable nail-blank-gripping dies. Fig. 19 is a side elevation of one of the nail-blankgripping dies carrying blocks detached. Fig. 20 is a plan view of the same detached. Fig. 21 is a view showing in elevation one of the nail-blanks after the same is pointed and severed, but before it is headed; and Fig. 22 is a similar view of the completed nail.

As shown in said drawings, the machine is mounted upon a suitable base or support 25, the top or which forms a circular table 26, from which there extends upward a column or shaft 27 and upon which are mounted and supported the various rotating parts of the machine other than the straightening, feeding, and cutting and pointing mechanisms. These latter are supported on a fixed head 28, secured to the upper end of the shaft or pillar 27 by means of screw-bolts 29 or in any other suitable manner and having a bracket 30 extending upward therefrom. Upon the top of this bracket are mounted the straightening devices 31, which may be of any approved construction, the form shown being a well-known one which does not require detailed description. Below these straightening devices there are located the continuously -rotating feed wheels or rollers 32, which are mounted on shafts 33 in suitable bearings in the bracket 30, said feed wheels or rollers consisting of peripherally-grooved disks which grasp the wire between them as it comes from the straighteners and feed the same vertically downward to the cutting and pointing devices. Motion is imparted to these feed-wheels by means of

pinions

34 and 35 on the rear ends of the shafts 33, said pinions intermeshing with .each other and cam which withdraws the nail-blankgripping one of them being of double thickness.as,

for instance, the pinion 35-in order to mesh with a pinion 36 on the rear end of a short shaft 37, mounted in the bracket 30 and having at its front end a beveled gear 38, which meshes with a corresponding pinion 39 on the upper end of a shaft 40. The shaft 40 is a vertical shaft mounted in suitable bearings in the pillar or fixed shaft 27 and having secured to its lower end a beveled pinion 41, Which meshes with a similar pinion 42 on the main shaft 43 of the machine. This latter is a horizontal shaft mounted in suitable bearings in the base or support and provided at one of its projecting or overhanging ends with fast and

loose pulleys

44 and 45, by means of which power may be applied to the machine from any suitable source by a belt or otherwise.

Below the feeding devices are located the cutting and pointing devices by means of which the wire is severed into pieces of the proper length to form the nail-blanks and is at the same time pointed. This mechanism comprises two cutter-carrying wheels 46, mounted on shafts 47, having suitable bearings in the head 28 and having at their rear ends pinions 48 and 49, which mesh with each other, one of said pinions-as, for instance, the .pinion 48being of double thickness and meshing with the pinion 36, by

- means of which rotary motion is imparted to the cutting and pointing wheels 46. Each of the wheels 46 has a plurality of radial slots or recesses 50, in each of which is mounted and adjustable a cutter 51, and to this end each of said wheels preferably has a body portion composed of two parts divided in a plane transverse to the axis of rotation. One of these parts consists of a disk 52, formed in one piece with the shaft 47, which latter is reduced as to its projecting portion beyond said disk and forms a polygonal hub or projection 53, having lateral plane faces 54, corresponding in number to the cutters. The other part 55 consists of a similar disk, in the inner face of which the slots 50 are formed and which bears against the disk 52 and is secured thereto by means of screwbolts 56 or in any other suitable manner. The disk has a central eye or opening 57, which is also polygonal in shape, having a number of sides equal to the number of sides of the projection 53, said opening being of reater diameter than said projection, therey leaving a space or series of spaces between the said projection and the inner edge of the. disk. There is thus formed what may be termed a polygonal slot 58, within which is located a plurality of nuts 59 equal in number to the cutting-dies 51 and arranged in radial lines with the same, being held from movement along said radial lines by the walls of the slot. These nuts may be adapted to be turned in any suitable manner, .and in the present instance they are shown as provided with radial holes 60 to receive the end of a suitable pin or key which vmay be inserted therein to' turn said nuts.

Each of said nuts is threaded internally to receive a screw 61, the inner end of which extends into a suitable aperture 62, formed radially in the hub or projection 53, while its outer end extends into the radial slot or recess 50 and is transversely slotted, as shown at 63, said slot receiving a corresponding rib 64 on a follower 65, arranged and fitting in the slot or recess 50 between the rear end of the cutter-die and the front end of the screw 61. It will be at once seen that each one of the cutter-dies being provided with the adjusting mechanism just described may be readily, accurately, and independently adjusted, so as to cause 1t to project beyond the periphery of the wheel by which it is carried to exactly the proper extent. After adjustment each die may be secured by means of a bindingscrew 66, extending through the outer part 55 of the wheel 46 and servln by bearing against the edge of the die-bloc to clamp the same firmly against the disk 52.

The rib on the follower prevents rotation of the screw when the nut is rotated, and thereby causes the screw to move longitudinally to effect the longitudinal adjustment of the die, while the provision of a separate follower between the die and screw prevents the lateral pressure exerted by the bindingscrew upon the die from placing a transverse strain upon the adjusting-screw which might tend to cause it to bind.

The cutting edges of the dies are of an old and well-known form .in common use, and are clearly shown in the drawings, requiring no detail description. When these cutters meet in pairs, as shown in Fig. 5, the nailblanks (shown in Fig. 21.) are severed from the wire and the point of the nail is formed at the same time. It will be noted that the two cutting and pointing wheels are of equal diameter and rotate at the same speed, so that the same pair of dies always cooperate, and by reason of this fact the dies of each pair having been once properly adjusted. relatively to each other will always meet in the same proper adjustment, whereas when different dies successively meet in pairs it is impossible to obtain an accurate adjustment which will assure the proper meeting of all of the dies.

Each of the wheels 46 is provided with a peripheral groove 67, these grooves being in the same plane with the cutting-dies and with each other andserving in conjunction with. the projection of saiddies to guide and give a clearance to the wire as it passes between the wheels or disks 46. The said wheels or disks 46 are also provided at or near each. edge of their periphery with circumferential ribs 68, which extend radially outward beyond the faces of said wheels or disks to an extent about equal to the extent to which the cutters project. These circumferential ribs are substantially in contact with each other as the wheels rotate and serve to pre- ITO vent any excess of strain upon the cutters, 1 o

which latter are adjusted so as to project with their outermost portions even with the outer faces of said ribs. The ribs thus further serve as guides for adjusting the cutters, and this adjustment may be facilitated by placing a suitable straight-edge across the ribs and adj Listing the cutters to the straightedge. Below the pointing and cutting mechanism and in the line of feed of the Wire there is mounted on the head 28 a stationary guide 69, through which the wire passes on its way to the chutes, by means of which it is delivered to the heading mechanism.

The heading mechanism as a whole rotates continuously around the column or shaft 27 as an axis and consists, essentially, of an upper rotating table 70, which carries the nailblank-gripping dies, and a lower rotating table 71, which carries the heading-dies, these two tables being concentric, or, in other words, rotating around a common axis, and being preferably formed on or secured to the upper and lower ends, respectively, of a sleeve or tubular body 7 2, which is mounted on the column or shaft 27, and which con nects and assures the synchronous movement of the upper and lower die-carrying tables. In order to impart this rotary movement to these parts, the die-carrying table 71 is provided around the periphery of its base with a beveled gear 78, which meshes with a beveled pinion 74 on the shaft 43.

Referring first to the upper table 70, which carries the nailblank-gripping dies, which latter for convenience will be hereinafter referred to merely as the gripping-dies, the same is preferably constructed in the manner shown in detail in Figs. 4, 8, 9, 14, 15, and 16. The upper part of thistable consists of a disk 7 5, which fits loosely around the column or shaft 27 or, as in the construction shown, around a fLxed sleeve thereon, which will be hereinafter referred to, said disk being provided with a central aperture 76 for this purpose. Around this central aperture there is formed in the under face of the disk 75 an annular recess 77 for the purpose hereinafter set forth, and said disk is also provided at its outer-margin with an annular i'lownwardly-projecting flange 78.

A series of vertically-extending apertures 7 9 are formed through the disk 75 for the purpose of feeding the nail-blanks to the grippingdies, and the lower portion of each of said apertures is enlarged or elongated radially with respect to the disk, as indicated at 80. Above each of the nail-receiving apertures 79 is lo cated a chute 81, having a passage therethrough, as shown in dotted lines in Fig. 1 of the drawings at 82, which passage has an enlarged receivingmouth at its upper end, the forward wall whereof is inclined, while the rear wall is vertical, the lower part of each chute forming a vertical passage for the nailblank, which communicates directly with the upper end of the aperture 79. Each aperture 79 has a corresponding chute 81, mounted on the upper side of the disk, the chutes being arranged in a circular series, so that their upper ends or mouths are successively brought into the lineof feed of the wire or, in other words, immediately below the guide 69.

The lower portion of the upper table consists of a disk 83, the inner portion of which consists of an annulus or ring 84, formed on the upper end of the sleeve 72, while the outer portion is built up of a plurality of segments 85, constructed in detail, as shown in Fig. 16 of the drawings. The inner annulus 84 and upper disk 75 are secured together by means of bolts 86, passing through suitable apertures 87 in said upper disk 75 and screwing into the body of the annulus 84. The outer segments 85 and the disk 75 are connected together by means of screw-bolts 88, passing through apertures 89 in the disk 7 5 and screwing into the respective segments 85. The segments 85 and annulus 84 are firmly connected by means of interlocking annular ribs and grooves 90, as shown more particularly in Fig. 14 of the drawings. The lower disk 83, which is in its preferred form thus con stituted, is provided with a plurality of radial slots 91, corresponding in numb er with the annular receiving chutes and apertures of the upper disk of the table, eight being shown in the present instance to accommodate a corresponding number of pairs of gripping-dies, al though it isobvious that this number may be varied as desired. In the radial slots thus formed are mounted the gripping-dies, which are in pairs, one pairbeing located in each slot, and the arrangement being preferably such that the outer die of each pair is fixed, while the inner die is movable toward and from said outer die to grip and release the nail-blank. The outer dies 92 are mounted, respectively, in the segments 85, which are radially slotted, as shown in Fig. 4, to receive said dies and are provided with set-screws 93 to bind said dies in position after adjustment. The adjustment of these outer or fixed dies is effected by means of radial adjusting-screws 94, one for each die, extending from the outer part of each segment radially inward and bearing against the outer ends of the dies, so as to form a firm abutment, which may be adjusted to give correct position to the individual dies and adjust them to compensate for wear. The working faces of the outer dies are constructed as shown in Fig. 17, being provided with a groove vertically formed in the face thereof, which is flaring at its upper part, as shown at 95, to receive the nail-blank, and which is notched or serrated at its lower part, as shown at 96, in order to roughen the side of the nail to increase its holding power.

The movabl'e or inner dies are mounted within the slots 91 toward and from the fixed IIC' ITS

tion 100 which extends out over both dies and which is provided with a vertical passage 101 therethrough, through which the nailblank is fed to its position between the dies. In order to actuate the movable dies, there is mounted upon the shaft or column 27 a fixed cam 102, which in-theconstruction shown is formed upon the lower end of a sleeve 103, whichis keyed to saidshaft or column and which is the sleeve around which the disk 75 loosely fits. This fixed cam 102 is constructed as shown in detail in Fig. 12 of the drawings, havingfa portion of its periphery (indicated at 104) of small diameter and which may be termed the release portion of the cam, a second portion 105 of somewhat larger diameter, which may be termed the normal portion of the cam, and a third portion 106 of still greater diameter which may be termed the gripping portion of the cam. The movable die-carrying blocks are each provided with a roller 107 to bear against the periphery of the cam and reduce the friction between the die-carrying blocks and said cam. The blocks may obviously be held against the cam by spring-pressure; but I prefer to. hold thempositively in contact by means of a second fixed cam 108, which corresponds in shape with the cam 102 and which, as shown in detail in Figs. 13 .and 14, is in the-form of a cam-groove in the under face of a disk secured to thesleeve 103 above the cam 102. A projection or roller 109 on each die-carrying block engages this camgroove, and since the two cams have their corresponding parts at proportional distances from the center, as indicatedin Fig. 12 of the drawings, it is obvious that as the table 70 is rotatedthe several die-blocks will be moved outward in the radial slots in said table by means of the cam 102and will be moved inward bymeans of the cam 108.

The movable dies 98 have theirworking faces grooved in the same manner as the fixed dies 92, said grooves having the fiaring upper portion 95. and the serrated lower portion already described.

Referring ,now to the lower table 7 l, which, as hereinbefore stated, is preferably formed in one piece with the sleeve or body 72, said table carries the heading-dies, of which a plurality are employed, equal in number to the gripping-dies just described. To this end the table 71 is provided with a plurality of chambers or recesses 110, which are open at their lower ends and in which are mounted the die-carrying blocks 111, which are capable of vertical movement in said chambers or recesses. This vertical movement is imparted to said die-carrying blocks by means of a cam 112, which is a fixed camformed upon the table 26, over which said blocks are carried by the rotation of the table 71. This cam has a depressed portion 113,,which comprises the greater portion of its circumference, an upwardly-inclined portion 114, an elevated portion 115, and a downwardlyinclined portion 116. The relative position of these cam-surfaces with those of thecam 102 are indicated in Fig. 11 of the drawings. In order to reduce friction, the die-carrying blocks 111 are provided with antifrictionrollers 117, mounted on shafts 118 in the dieblocks, and in order to prevent said rollers from bending under pressure they are preferably constructed, as shown in Fig. 4 of the drawings, of a plurality of disks, thealternate disks being provided with central'hubs whereby the bodies of the disks are spaced apart.

Each of the die-carrying blocks 111 isprovided with a shank or stem 119, which extends u ward through a suitable aperture 120 in t he table 71, and intothis shank or stem is screwed the corresponding headingdie 121. Each of these heading dies has mounted upon its threaded lower portion a locking and adjusting nut 122, by means of which said die may not only be firmly secured and locked into ositionin the shank of the carrying-block, ut may also be adjusted so as to regulate its distance from the gripping-dies above it. Each heading-die is arranged directly below and in the line; with the grooves in the faces of the corresponding pair of gripping-dies. I also provide means to limit the downward motion of the diecarrying blocks, and consequently of the heading-dies, and to this end I employ for each carrying-block a rod or 'bolt 123, which passes loosely down through an aperture 124 in the table 71, its lower end screwing into or being otherwise secured to the carryingblock, while its upper projectingend has adjustably mounted upon it outside of the 11pper surface of the table 71 a nut or nuts 125, which by contact with the upper surface of said table serve to limit the downward motion of the die-carrying block. It will be noted that each heading-die is independently adjustable both as to its position relatively to the gripping-dies and as to its downward limit of motion. The upper surface of the table 71 is preferably inclined in adownward and outward direction, as clearly shown in Fig. 1, in order that the nails may be readily discharged from the machine after being ,released from the dies.

The upward thrust of the heading-dies causes considerable strain and wearupon the to each other. In the construction shown said head is provided with a lower section 28*, which has a screw-threaded connection with the upper section, by means of which said lower section may be adjusted to take up the wear upon its lower surface.

The machine thus constituted operates in the following manner: The wire is drawn continuously from the reel or coil and passing through the straightening devices is fed, by means of the feed wheels or rollers 32, to the cutting and pointing wheels, where it is severed into blanks of a considerable length and the point fully formed at the moment of severance by means of the mechanism provided for that purpose, the detailed construction and operation of which has already been described. The severed blanks pass successively from the cutters through the guide 69 to the chutes 81. The table 70, which carries these latter, rotates at such a speed that each blank is dropped singly into a chute, which passes beneath the guide 69 at the proper moment, and each chute receives only a single blank. The flaring mouth of the chute adapts it to receive the blank and guide the same to the contracted lower portion of the passage 82, while the vertical rear wall of said passage serves, in conjunction with the fixed guide 69, to sever the blank from the-following blank in case the cutters may not have entirely severed it, whereby the blank may be left connected to the succeeding blank by a thin fin or web of metal, which fin or web will be broken off if it exists by reason of the succeeding blank being held stationary in the guide 69, while the first blank is carried forward by the vertical rear wall of the chute. The nail-blank is conducted, by means of the passage 82, to the corresponding aperture 79 in the disk 75, and through this aperture and through the aperture 101 the blank is conducted to the space between the gripping-dies, which are then separated, for the reason that the movable die-carrying block is in contact with the part 105 of the cam 102, and the dies are sufficiently separated to permit the blank to pass freely between them. The blank continues its downward motion until its lower or unpointed end comes in contact with the upper end of the heading-die, which latter is then depressed, owing to the fact that its carryingblock is traveling over the depressed portion 113 of the cam 112. It will be seen that the adjustment provided for determining the downward limit of motion of the heading-die determines the amount of metal which shall project below the lower faces of the grippingdies, and this amount of metal, which subsequently forms the head of the nail, may be thus gradually regulated to the requirements of each case. As the table continues to rotate the movable gripping-die is moved toward the fixed gripping-die by reason of the contact of its roller with the ortion 106 of the cam 102, and the nail-blan is thereby gripped and firmly held between the gripping-dies and at the same time roughened or barred laterally. Continued rotation of the table causes the roller 1 17 of the heading-diecarrying block to come into contact with the incline 114 of the cam 112, and the headingdie is thus forced upward, thereby forming the head of the nail, which is completed as the said carrying-block travels over the elevated portion 1 15 of the cam 105. The heading-die is released. when the incline 116 of said cam is reached, and at the same time the release portion 104 of the cam 102 is reached by the roller of the movable gripping-die block, which latter is moved inward away from-its fixed companion die by means of the cam 108. This inward movement of the gripping-die releases the completed nail, which is at the same time carried laterally inward along with the die-block by reason of its engagement in the aperture 101. This inward movement is permitted by reason of the radially-elongated portion of the aperture 79 and carries the completed nail clear of the upper end of the heading-die, thereby permitting it to dro out of the machine. The inclination of t 1e upper surface of the table 71 facilitates this discharge of the nail, and the parts are then brought into position ready to receive another nail-blank,

which is operated upon in the manner just described.

It will be seen that the machine is a rotary machine and is thereby ada ited for continuous use at very high speed,'ti1e capacity being only limited by the rate of speed and the number of sets of dies employed. The independent adjustment of each set of dies assures accurate working, while the arrangement of the heading-dies concentrically with the grippingdies causes each heading-die to always cooperate with the same pair of gripping-dies and permits the three dies of each set to be accurately adjusted, whereas if these parts were so arranged that a different hcadingdie would successively cooperate with different pairs of gripping-dies accurate adjustment would be impossible. The sectional construction of the upper revolving table ermits ready access to the moving parts an enables the parts of the table to be readily separated and assembled for inspection or repair. The machine is furthermore compact and durable and possesses other advantageous features of construction and operation, which have been more specifically pointed out .in

the deatiled description of its component parts.

I claim 1. In a wire-nail machine, the cutter-disks, each provided with a lurality of radial slots, a cutter-die longitudinally movable in each slot, a follower for each die, a screw engaging said follower and heldt -irom rotation thereby, an adjusting-nut for each screw held from longitudinal movement, and a set-screw for each die for locking the same after adjustment, substantially as described.

2. In a wire-nail machine, the combination with a fixed central shaft, of a horizontal rotary table provided with an outer series of fixed gripping-dies and an inner series of movable gripping-dies, and fixed cams on said central shaft for moving the latter series of dies toward and from theformer, substantially as described.

3. In a wire-nail machine, the combination with a rotary table having outer fixed gripping-dies and inner movable gripping-dies, of chutes and passages, whereby the nail-blank is guided to said dies, and radially-movable die-blocks carrying the inner dies and having apertures through which the nail-blanks pass, substantially as described.

, 4. In a wire-nail machine, the combination with the upper rotary table having a plurality of pairs of gripping-dies, of radially-moving die-blocks carrying the movable dies of said pairs and provided with apertures through which the nail-blanks pass, and the lower rotary table provided with a plurality of heading-dies corresponding in number with the pairs of gripping-dies and concentric with the fiXed gripping dies, substantially as described.

5. In a wire-nail machine, the combination with the upper rotary table carrying a plurality of pairs of fixed and movable grippingdies, of a lower rotary table concentric with the upper table and provided with a plurality of vertically-movable heading-dies corresp onding in numb er with the p airs of grippingdies, means for moving the movable gripplngdies toward and from each other, and means for moving the heading-dies toward and from the gripping-dies, substantially as described.

6. In a wire-nail machine, the combination with the upper rotary table and its grippingdies, of a concentric lower rotary table havin-g vertically-movable heading-dies corresponding in number with and located directly below the'pairs of gripping-dies, and means for adjustably limiting the downward motion of the heading-dies and thereby determining the amount of metal projecting below the grip ing-dies to form the nail-head, substantial y as described.

7. In a wire-nail machine, the combination with the upper rotary table and its gri pingdies, of a concentric lower rotary tab e provided with a plurality of headingdies equal in number with the pairs of gripping-dies of the upper table, each heading-die being independently adjustable toward and from its coacting pair of gripping-dies, substantially as described.

8. In a wire-nail machine, the combination of a horizontal rotary table provided with a plurality of pairs of gripping-dies in its lower portion to hold the nail-blanks, its upper portion being provided with a plurality of apertures for the passage of the nails and with a plurality of chutes above the apertures, means to head the nail-blanks while held by said gripping-dies, and suitable feeding and pointing mechanism above said chutes to feed the wire vertically downward thereto and to sever and point the nail-blanks before delivering them to the chutes, substantially as described.

9. In a nail-machine of the character described, the combination with the horizontal rotary die-carrying table having a plurality of nail-blank-receiving chutes with vertical rear walls above the dies, of cutting and pointing wheels located above the path of said chutes, and a vertical guide arranged between said cutting and pointing wheels and said chutes, whereby imperfectly-severed blanks may be separated from each other, substantially as described.

HERMAN E. SCHNABEL.

Witnesses:

FREDERICK C. GoonwlN, S, T. MANN.