US1283730A - Nail-head-shaping machine. - Google Patents

Description

:SEST AVAILABLE CO'r GQGODDU.

NAII. HEAD SHAPING MACHINE.

' APPLICATION FILED MAY I5; I9I5. 1,283,739. Patented Nov. 0, l

3 SHEETS-SHEET I fizg G. GODDU.

NAILHEAD SHAPING MACHINE.

APPLICATION FILED MAY is. 1915.

1 ;283,730. Patented Nov. 5, 1918.

VE/V 727/3 5 5% G. GODDU.

NAIL HEAD SHAPING MACHINE.

APPLLCATION. flLiD MAY :5. 1915.

1 ,283,730. Patented Nov. 5, 1918,

3 SHEETS-SHEET 3.

1 and size.

UNITED STATES PATENT onnron.

GEORGE GODDU, OF WINCHESTER, 'MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW J EBSEY,

A CORPORATION OF NEW' JERSEY.

N AIL-HEAD-SHAPING- MACHINE.

Specification of Letters Patent.

Patented Nov. 5, 191 s.

Application filed May 15, 1915. Serial No. 28,344.

Improvements in NailHead-Shaping Machines, of which the following description, in connection with the accompanying drawngs, is a specification, llke reference characters on the drawings indicating like parts in the several figures. o

The invention to be hereinafter described relates to machines for shaping the heads of nails. o

In certain machines employing loose nails it is desirable for properdelivery of the nails thereto and the appearance of the work into which the nails are driven, that the heads of the nails shall be of uniform shape To secure this desired end it has been customary during the nail making operations to form the nail heads somewhat larger than desired and then reduce them to uniform size and shape in another machine by forcing them through a die of appropriate design. In such machines the nails, the heads of which were to be'shaped, have been taken singly from a source of supply and each nail centered and supported over a'die by its head with the body or shank of the nail extending loosely below the die, whereupon the die and a punch wererelatively moved toward each other to force the head of the nail through the die. I One of the obj ects of the present invention is to improve a machine of this general character whereby greater uniformity of product may be secured.

An important feature of the present invention consists in means for centering and positioning the shank or body of the nail at the side of the die opposite the nail head to prevent lateral swing of the nail body and cause the nail head to seat squarely on the die as the punch acts upon the head;

Another important feature consists in means for centering the nail head at one side of the die and the shank or body of the nail at the opposite side of the die, thus insuring proper location or" the nail head withrespect to th die and substantial coincidence of the longitudinal axes of the nail anddie.

It is a further object of the present invention to retain the shank or body of the nail under control of the centering means until the nail head shaping operation has been started, to msure proper dlrectlonal movement of the nail as the punch forces the head through thedie.

Another purpose of the invention is to increase the output of a machine of this general character by simultaneously treating more than a single nail at each operation and to provide means whereby, should an ob- 1 struction occur to the proper supply of one nail, it will not prevent the simultaneous supply of another.

Other features of the invention and various improved details of construction will be pointed out by the specification and claims.

In the drawings Figure l is a perspective view of a nail head shaping machine embodying the present invention, some of the parts being broken away for clearness of illustration.

Fig. 2 is a side elevation and part sectional view of the machine shown by Fig. 1, some of the parts being omitted and, others broken away to disclose parts beyond.

Fig. 3 is an enlarged detail in front elevation, showing more particularly the die, die carrying slide, the upper and lower nail centering jaws and their operative relation.

Fig. 4 is an enlarged vertical section of i the punch head and the means for adjusting the position of the punch. I

Fig. 5 is a perspective view of the upper portion of the eccentric sleeve surrounding the punch carrier.

Fig. 6 is a view similar to that of Fig. 5 showing the upper portion of the punch carrier.

Fig. 7 is a perspective of a detached detail, showing the relation of one of the upper and lower nail centering and the die, and illustrating the position of thenail just prior to the head shaping operation.

Fig. 8 is a perspective view on an enlarged scale showing more particularlythe" end of the raceway, the nail separator, the nail lifter in its lowered position and the relation of the die, the upper and lower centering jaws, punch and nail carriers before anail is placed in position for the shaping operation. f

Fig. 9 isa perspective view looking toward the side and end of the raceway and showing the nail stop and position of the to the'return of the parts to the position and the nail carriers taking a nail from the lifter, and illustrating also the relation of the centering jaws, die, and punch with respect to. the lifter and carriers.

. Fig. 12 is a view similar to that of 11 but showing the, nail as'having been taken by the carriers and placed 'inpositi'on between. the punch and the die, some of the these parts being broken away. Y, a

Fig. 13 is a view: similar to that of Fig. 12,

but showing the nail 'carri'ers' as having' 'released the nail and the latter as held in the upper and lower centering jaws and die aspartszand thepu'nch relatively move, in the direction of approach.

Fig. 14 is a view similar to having released the nail and the punch acting upon the nail head. v

Fig. 15 is a similar View showing the final position of the parts, as the punch forces the nail head through the die and just prior shown by Fig. 8.

Fig. 16 is a perspective view of the lower centering jaws which gmsptea them and hold the body .of' the nail below the head unti'lthepunch starts the'nail head through the die, the jaw carrying arms being broken away.-

Fig. 18 is a slmilar View showing the same nail after its head has been shaped.

hoppers, which, in the present instance, are of; the rotary type, and since the present invention contemplates the simultaneous treatfnent of two nails, two of such hoppers E7 and- -8-are provided, T he hoppers and 8 are suitably mounted on the head frame and be conveniently rotated from the back shaft 9 through gearing connection thereitl part 10 ofv such connection being illustrated in Fig. 1. The back shaft 9 is 7 thatofFig. but showing the upper centering jaws as v v I from the back shaft 9, Fig. 1. The shaft 7 igQlT showsthe nail as it may appear beforehavmg ltshead shaped in the present mach a d ails, the heads of which are to be Sh sta, are supplied to the machine from suitable pose that will presently appear.

supported in suitable bearings 11, Fig. 1, onv the head frame, and may be driven from s the shaft 4:, as'by the belt connection 12.

' the nail head shaping means to be herein- -after described.

The upper end of each raceway hasa portion 14 on to which nails are dropped as the hoppers are rotated and in order to prevent clogging of the nails and facilitate their travel down theQraceWay, the upper receiving portion of each raceway is preferably agitated from time to time by suitable means. In the present instance such means'eons-ists of ahammer 15 for each raceway pivotally supported at 16 and nor-- mally underlthe influenceof a spring 17 tending to depress the free end 18 of the hammer into contact with the upper portion of its associated raceway. Secured'to v thehead frame is a bracket 19 carrying a bearing .20 for a "shaft 21 which may be rotated by any suitable means, such as the belt and pulley connection 22, 23 and 2 1 21 carriesa hammer lifter 25 adapted to act upon the hammers to lift them as the shaft rotates and then permit them to respond abruptly to the action of their springs 17 thereby to strike" the end portions of the raceways and agitate the nails resting her nl I The raceways are of the type wherein the nails are supported byv their heads with the shanks-or bodies of the nails extending into the slots of the 'race'ways andit is intended that the nailsw'hile thus supported shalltra'v'el to the delivery end of each 'race- I way. To remove hails from "the 'race'way which fail to takethe describedposition and arrange the nails in proper order in the raceway, there is provided for each raceway a rotary toothed member 26, the teeth of which pass sufficiently close to the top of the raceway to prevent the passage of nails not properly positioned and yet permit the passage of thosew'hich are properly supported a by their heads upon the raceway. Rotary motion may be imparted to said toothed 1115 members by appropriate means, which in the present instance, comprises gearings 27 and 28 foperati'vely connecting the shaft 21 a with the rotary toothed members. Asthe improperly positioned nails are thrown from .120

the raceways, they pass into chutes or troughs 29 one for each raceway, and may be returned tothe hoppers; Each raceway has a cover 30, which serves to prevent nails properly positioned in the raceway from being dislodged as they travel downward therein, and such cover is provided at the delivery end of its associated raceway with a guide portion 31, Figs. 1' and 9, for a pur- As the nails are delivered at the ends of the raceways, the present invention contemplates that they shall be taken therefrom successively and'presented to the nail head shaping means, which in the present form of the invention consists of a punch and die. The means for carrying into efiect this feature of the present invention may be variously formed, and as shown comprises a lifter adapted to take the endmost nail from each raceway and raise it to a position-to be engaged by nail carriers which thereupon take control of the nails and place them in position between the punches and dies. A good practical form of this feature of the present invention will now be described.

Mounted in suitable guideways in the machine head 3 is a lifter slide 32, Figs. 2 and 11, which is reciprocated in its supporting guides by appropriate means. In the illustrated form of the invention said means comprises a rack 33 formed as part of or connected to the lifter slide 32, and a toothed segment 3% carried by an arm 35 mounted to rock about an axis 36, and having a roller 37 engaged by an appropriately shaped cam 38 on the shaft 4., the construction being such that upon rotation of the shaft 4 the arm 35 will cause the lifter 32 to be reciprocated in its guides.

The lifter 32 reciprocates in a path between the end of the raceways and the nail head shaping means and is provided with a slot 39 for the passage of nails, as indicated J- in Fig. 11. Secured to the lifter slide at each side of the slot 39 is a cap piece 4 0, the adj acent end portions of which are provided with nail head passages 41, Figs. 9 and 12, to accommodate the head of a nail delivered from the associated raceway. These cap a passageway ll suitab e to the heads of the nails, to be treated.

In order that the end nail of the series in each raceway may be properly delivered to the lifter 32 and the remaining nails be prevented from leaving the raceways or interfering with the nails in the lifter as the latter rises to position the nails for the nail carriers, there is provided a nail stop and a. nail separator for each raceway, and as one is or may be the same as the other, a description of one will be suficient for a proper understanding of this feature of the invention. The nail stop 43 is adjustably secured to an appropriate support, which, in the present instance, is the end portion of the adjacent raceway, by bolt and slotconnections H, 45, Fig. 8, and extends through the slot 39 of the lifter, Fig. 9.

Mounted for movement in suitable transverse guideways 4E6 at the end of the raceway, it'llall separator 47, Figs. 8 and 9,

pivotally comiected by the pin 48 to an arm 4:9 pivoted at 50, Fig. 2, to the head frame and carrying a roller 51 in operative engagement with a cam 52, the construction and timing of parts being such that when the lifter is in its low position ready to take a nail from the series, the nail separator is moved forward to insure that the end nail of the series shall be taken by the lifter and the remaining nails be pushed back in the raceway to provide clearance between the head of the nail in the lifter and those yet in the raceway. To secure these objects more effectively the separator 47 has a beveled end portion as at 53, Fig. 9, to act upon the nails in the raceway as the separator-moves forward, as described. The separator a7 is provided with a slot 5% through which passes the pivot pin i8, and a spring 55, Fig. 8, connected to the arm ll) and separator 47 as indicated in Fig. 8 normally acts to retain the separator and arm in the relation illustrated but permits the separator to yield against the action of the spring should any unusual obstruction be presented to its forward or separating movement.

As hereinbefore stated the end nails in the two raceways are delivered to the lifter and such nails hang in the lifter by their heads which are engaged in the nail head passages of the lifter. Asthe lifter rises it is desirable that the body of the nail in the lifter be prevented from swinging movement and to this end the raceway covers 30 are provided with the guides 31, hereinbefore described, which extend from the top of the raceway and are adapted to counteract any swinging tendency of the nails as they are raised by the lifter to position for the action of the nail carriers.

he nail head shaping means in the present form of the invention comprises a punch and a die which have relative movement in a plane at one side of the lifter. It therefore becomes necessary after the nails to be treated have been taken from the raceways by the lifter to transform them int position between the punch and die. his operation is performed by nail carriers, which constitute an important feature of the present invention and a articular form of which will now be described in connection with the duplex machine illustrated.

Mounted for rocking movement about an axis or shaft 56 supported by the head frame 3, Figs. 1 and 2, is a yoke 57 carrying at its lower portion two carrier arms 58, each of which has adjust-ably secured thereto by suitable means, such as the bolts 60, Figs. 3 and 8, a carrier jaw 59. The yoke 57 has an extension 61 to which is connected at 62 a rod 63, which is itself jointed at (it to an arm 65 pivotally mounted at 66 in the head frame. and having connected thereto for movement therewith an arm 67 carrying a 4:. The construction last described is such that :upon rotation of the shaft 4 the yoke.

'57 and perforce its two carrier arms and carrier jaws will be rocked about'the axis 56 as a center. Thetwo carrier jaws 59 are appropriately positioned in se arated relation so that as one engages a nai presented by the lifter from one raceway or supply, the other will be caused to similarly engage the other nail. presented by the lifter from the other raceway. Each of the carrier jaws 59 has an end portion notched as at 70, Fig.

. 8, and appropriately shaped to embrace the shank or body of the nail in the lifter below the head of the nail, as will more fully appear.

Each of the nail carrier jaws 59 is associated with a cooperating nail carrier jaw 71 each mormted upon a carrier'arm 72, Figs. 1 and 2, loosely supported by the shaft 56 ,for rocking movement. thereon. Mounted on the shaft 56 to rock therewith are the arms 73, one for each carrier arm 72, and one of which is provided with an upward extension 74 connected at 7 5, Fig. 2, to an actuating rod 76 which may be operated from the shaft 4 by suitable connections, such'as the rocker arms 77 and 78 mounted for rocking movement together about the axis 66 under the action of a roller 7 9 and cam 80 of appropriate form. v

The carrierarms 72 and the arms 7 3 are connected for relative yielding movement, and as one means to this end the carrier arms 72 are each provided with a slot 81, Figs. 1 and 2, which is engaged by a pin 82 projecting from one of the arms 73, an appropriate spring beingprovided for normally holding the said arms in the relative position indicated by Fig. 2. A convenient form of such spring is illustrated in Figs. 1 and 2, as having a portion 83 coiled about the-shaft56 with the free ends of the spring engaging lugs 84- and 85 on the arms 73 and 72 respectively, the construction being such that said springs normally retain the pins 82 in the outer end portions of the slots 81 and cause said arms to move in unison under normal working conditions, but should either of the carrier arms 72 be abnormally obstructed in its movement, as by a misplaced nail, the spring will permitsaid arm to yield without interfering with the normal operation of the other arm 72. The nail -carrier jaws 71 are each provided with a recess 86 to receive and hold the head of a nail presented to it by the lifter.-

The construction and relation of the parts for taking the nails from the lifter and transferring them to a position between-the punch and die are such that as the lifter reaches its top position the carrier jaws'59 are first moved toward the lifter to position the slotted end portions 70 of said jaws in recesses 87 ofthe lifter caps, Fig. 11, toinsure. the reception of the nail body in the slots 7 0 of the carrier jaws -59. Thereupon, or simultaneously with such movement of the carrier jaws'59, the carrierjaws 71 are I moved toward and into the slotted portion of the. lifter to engage the heads of the nails and move them forward into the slots 70 of placed nail inthe lifter, it will yield under the action of the spring beforedescribed, and not prevent the other lifter jaw 71 from cooperating with 'its'companion jaw 59. Thus means are provided in a duplex machine for normally presenting two' nails to the nail head shaping means, and under abnormal obstruction to the presentation of one nail to permit the other to be properly presented.

The nails being now transferred .to -:a .position between the punchesand dies, the pres ent invention furtheraims so to position or center the nails laterally and longitudinally with relationtothe axes of the .punchesand dies, that when the nail heads are forced through the dies they shall be properly shaped. To secure this-result and uniformity of product the body or shank of the nail should be centered or positioned -uniformly with relation to the aXis of the die through which it is -forc ed,'and the head should be correspondingly centered and positioned on the die. .It is desirable also-that when the punch meets the nail to force .it through the die the centered relation of the longitudinal axis of'the die and the nail should remain undisturbed. 'Theseponditions and the resulting uniformity oftproduct are-secured by the present invention as will now be more fully set forth. p

In the present form of the invention, relative movement of the punches and dies is secured by reciprocating the :dies toward and from the punches, and as one appropriate means to this-end the head frame 3 is .provided with guideways for ,a slide-plate 88,

which will be hereinafter called the-die-slide. Y

ing a roller 94 engaged by, a suitable cam 95 secured to rotate with the shaft -l-, the construction being such that as the shaft 4 rotates the die slide 88 will be reciprocated in its guideways on the head frame.

The die slide 88 carries two dies, one for each of the nails, the heads of which are to be shaped, and since said dies, their cooperating punches and nail centering and positioning means, are similar in construction and o oration a description of one set will be su 'cient for a full understanding of these features of the invention.

The die consists of a body or carrier 96 secured to the die slide by means of suitable bolts 97 and a covering plate 98, Figs. 1 and 3. The die carrier 96, Fig. 10, is provided with a shoulder 99 and in the present instance the die plate 100 is secured to the can rier 96 to providebetween the shoulder 99 and die plate a space or opening for a purpose hereinafter explained. As one means of securing this relation of the die plate and carrier, the latter is provided with a block 101 having a centering pin 102 for engaging a slot or opening 103 in one edge of the die plate, and corner posts 10st to which the die plate is detachably secured by suitable means, such as the screws 105. The die plate 100 has an opening 106 which constitutes the die proper through which the heads of the nails are forced by the punch to shape and size them. If desired, a pin 107 may be employed to assist in properly locating and holding the die plate in position on the die carrier. I

As hereinbefore noted the present invention aims to position the nail with respect to the die and punch in such manner that the head will be centered upon the'die and the body of the nail will be centered and held from sidewise movement as the punch meets or acts upon the nail. These effects are secured by nail head engaging and centering means at one side of the die, and nail body engaging and centering means at the opposite side of the die, a good practical form of which comprises upper and lower centering jaws which engage the nail head and body respectively and then successively release the head and body as the punch meets and acts upon the nail.

Pivotally mounted upon the die slide 88 at 108, Fig. 3, is the arm 109 carryingat its upper end the plate 110 provided with a centering jaw 111. closely super acent to the die, Figs. 11, 12 and 13. Similarly pivoted to the die slide 88 at 112, Fig. 3, is an arm 113 carrying at its upper end the plate 11% aw 115 above the die, the meeting jaws 111 and 115 forming between them when closed a seat for the head of a nail for centering and positioning the nail head above the die. The two upper jaw carrying arms 109 and 113 are normally held in closed relation provided with companion centering by means of a spring 116, Figs. 1 and 2, but are adapted to be opened as the punchmeets the head of a nail centered in the jaws. To this end the arm 109 is extended below its pivotal connection 108 with the die slide and carries a roller 11'? which iscaused to travel along a cam 118 as the die slidereciprocates by means of a spring 119 extended between the arms 109, Figs. 2 and 3. In order that both jaws of the upper centeringmeans may be moved to open and close them, the arms 109 and 113 are connected for movement simultaneously in opposite directions. A good form of connection for this purpose is shown in Fig.3, wherein each of the arms 109 and 113 is provided with engaging segment teeth 120. 7

From the construction of the upper centering jaws and their operative relation as thus far described, it will be noted that as the nail is transferred from the lifter to a position between the punch and die or has aboutreached this position, as in Fig. 12,'the die slide starts to rise carrying the upper centering jaws with it, and when, or about the time, the nail passes into the upper centering jaws and the die, the nail carriers separate, Fig. 13, permitting the nail to drop and the nail head a to rest in the upper .centering jaws as indicated in Fig. 13. The nail now hangs by its head from the upper centering jaws with its body portion loosely suspended within the die. The die slide continues to rise and when, or just before, the punch meets the head of the nail the cam 118 opens the upper centering jaws and permits the head of the nail to restupon the upper or entering port-ion of the die. Owing to irregularities in the nail head where it rests upon the die or to the vibration of the machine or other causes, the body of the nail is liable to swing to one side in the die and thus disturb the centered position of the nail head on the die with the result that as the punch forces the nail through the die, the proper shape will not be imparted tothe head. This invention therefore provides means to center and hold the body of the nail at the side of the die opposite the nail head until the punch has started to force the head through the die, as will now be explained.

The die slide has secured thereto, as by bolts 121, Figs, 1, 2, 3 and 11, the blocks 122,

one at each side. thereof for the pivotal support of lower centering jaws, and as said block and lower centering jaws for each side of the die slide aresimilar the following description of one will be sufficient to make this feature of the invention clear.

Pivotally mounted at 123 and 124 on the block 122 are the lower centering-jaw carriers 125, each provided with'a clamp 126 and bolt 127 for adjustably securing thereto the lower jaws 128, the active end portions of which are turned toward each other at faces and an-opening to direct the pointed it end ofthe nail between the jaws as the nail assumes the position indicated in Figs. '1

and 13,

Thelower-jaw carriers. 125 have portions 131,'Figs;;3 and 11 normally under the in- 'finence of spring 132', which tends to Separate the portions 131 and maintain the lower jaws normally in closed relation, and to insure corjrespondingmovements of the lower jaws asthey are opened and closed the two lower ja'w carriers are provided with engaging toothed segments 133 and 134'. It is desirable that the toothed segments be related 'to cause theirteeth to be properly engaged and that onej aw be adjustable relatively to the other jaw'to enable the opening between the. jaws to be centered in line with the die, and to this end one of "the toothed segments, the segment 134 in the present instance, is formed independently 'of'the jaw carrier and the pivot stud 1 24h as an eeeentrijc portion 135, Fig. 11, on which the sleeve 'offthe toothed segment 134 is mounted so that by turning the pivot stud 124 the toothed segment may be bodily moved toward or' from the segment 133 and the teeth of the segments be operatively' positioned as desired. The sleeve ofthe toothed segment 1345s secured to the lower jaw carrier 125 by means of a clamp 136 and set screw 137 and is 'preferably'form'ed with an eccentric lower portion, the Construction being such that by loosening the clamp 136 the sleeve may beturned with relation to the jaw carrier 'andstu'd 124, thus adjusting the aw carrier 125 to properly center the opening of the lower jawsunder the die.

From the construction described as one good practical form of the lower or nail body centering means, it willbe seen that as the nail assumes the position with its head a'betwe'en the upper centering jaws, Figs. 7 and 13, the body portion 'of the nail will eXtendthrough the die 106 beneath "the upper centering jaws, and into the opening between 1 the ends of the lower centering jaws benath'thediej A's thedie and punch continue .to, 'appr'oach,="the u'pper'or head 'center ingfj'aws separate, in Fig; 1-'4, -to' permit ihe head; of the ail tofrest upon; the

top of the die, but the'lowercentering' j'aws still contihuetb embrace the shank or-nbody of the nail to 1 prevent 'l'ateralswing thereof asth'e-pun'chacts-uponthe nail head; When, however, the punch has initiated mjovement far the 'ha'il' head arrange the dieor has engag'ed the nail head with sufficient force to insure against any tilting or swinging movement of "the nail body, it 1s desirable that the lower centering jaws be opened to permit I the nail to pass through the die and into a sultable chute or receptacle after its head has been shaped.

Various forms of means may be employed I for thus opening the lower centering jaws, but since the centering jaws above the die first release the head of the nail and there-.

al'ter the centering jaws below the die release the body of the nail, the present invent1on anus to open the lower centering 'j aws by theop'ening movement of the upper centering aws. As one means to this end the lower jaw carriers 125 are each provided centering ja'w's are opened, as hereinbefore explaine'chfpass'es' between the c am portions 138 of the lower jaw carriers and opens the lower centering jaws, ,the relation of parts being such that the vpinz'or stud thus acts upon thec'am 138 after the upper centering jaws havestarted to open, as indicated in. Fig. 14, and thehead of the nail hasbeen met by the punchg- The punch is ad'ustably mounted in the head frame so thatthe longitudinal axes of the punch and die may be readily brought into alinement. As a preferred form of construction, the punch 140, Fig. 4, is provided with-a conical head 141 adaptedto be received in a correspondingly shaped socket or seat'in a punch holder 142 and held therein by appropriate-means, such as the stem 143,

which; may be threaded to the: punch head and extend longitudinally of the punch holder beyond its end opposite the punch where it may receive a nut 144. The punch is eccentrically mounted in the holder 1.42 with respect to its longitudinal axis, and the barrel portion of the punch holder 142 is mounted in the opening 145 eccentrically formed with respect to the longitudinal axis of the. Sleeve 46- The fpun'ch holder may I beheld in the sleeve 146 by any suitable means, butinv the present instance it is provided with a shoulder14-7 which engages the lower end of the sleeve and is held adjustably -therein by :means, of lock nuts 143 V threaded to the upper end 149 ofthe holder 142 and overlying a portion of the upper "end of the sleeve, Fig. 4. v I

Thesleeve 146 has a head portion 150 to restupon the top of'the splitclamp 151 supportedbythe head frame and a threaded lower-portion to receive asuitable nut 152. W

In order that the sleeve may be adjusted ro i 50 tatably in the clamp 151, the flange portions of the split clamp are provided with bolts 153 which maybe loosened when desired to permit the sleeve to be adjusted and then set up to hold it in adjusted position.

The sleeve 1 16 and its head 150 are also split longitudinally as at 154 and 155 and may be further partially split at 156 and 157 to clamp the punch holder inplace and yet permit the punch holder to be rotatably adjusted in the eccentric opening 145 of the sleeve. From the construction described it will be apparent that the punch 140 is under adjustment control of two eccentrically related parts, whereby it may be readily brought into exact alinement with the die and then be held rigidly in place.

Metal chips are liable to accumulate about the die and interfere with the proper action of the nail centering means or prevent proper positioning of the nail in the die. In the present invention an air blast is caused to play upon the die and adjacent parts to remove the chips. Such air blast is provided by an air conduit 158,'Fig. 1, leading from a pump 159, which may be conveniently operated from the shaft 1 by means of a rod 160 connected to an eccentric 161 or other operating element on the shaft at. The air from the pump and conduit is passed to the head frame of the machine and is directed upon the parts from an opening or exit 162, Fig. 2.

The operation of the machine has been pointed out during the description of the parts and their associated relations and further elucidation thereof is not necessary, but the character of the work done may be made more clear from Figs. 17 and 18, the former of which shows the general form of the heads a of nails supplied to the machine for treatment, while the latter shows the condition and general shape of the nail heads after being treated in the present machine. Nails of the character represented by Fig. 17 are supplied to the hoppers of the present machine and taken from the raceways by the lifter which is adapted to engage and lift two nails, one from each raceway, from a position Fig. 9 to that of Fig. 11 to be engaged by the nail carriers which transferthe nails from the position Fig. 11 to that of Fig. 12 between the punches and dies. Thereupon the die slide rises and when the pointed ends of the nails have entered the centering jaws and dies, the carrier jaws separate, Fig. 13, letting the nail heads rest in the centering jaws above the die and the body of the nails in the centering jaws below the die. Upon further upward movement of the die slide and centering jaws carried thereby, the centering jaws above the die separate, Fig. 1 1, letting the heads of the nails seat themselves upon the dies, whereupon the punches engage the heads of the nails and start them through the dies. lhe upper centering jaws continue to separate as the die slide rises and when the punches have exerted sufiicient pressure upon the nail heads to insure proper directional movement of the heads through the dies, the lower centering jaws separate to permit the passage of the nails through the dies.

In order that the nails, the heads of which have been shaped, may be properly collected by suitable receptacles unmixed with chips, each die holder 96 is connected to a tubular chute 168 which passes through a piece of packing 16 1, such as felt or the like, sustained upon a chip receiving pan or shelf 165 supported from the head frame, Fig. 1. These tubular chutes 163 also extend through the pan or shelf 165 and move up and down through the packing as the die slide is reciprocated, the result being that while the metal chips may fall upon the pan or shelf 165 they are precluded from falling into the nail receiving receptacle beneath.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is 1. In a machine for shaping the heads of nails, the combination of a punch and a die constructed and arranged for the passage of a nail parallel to its longitudinal axis, nail head centering means for engaging the head of a nail at one side of the die and positioning it with respect to the die, and nail body centering means for engaging and positioning the body of the nail at the opposite side of the die.

2. In a machine for shaping the heads of nails, the combination of a punch and a die, nail head centering means for engaging the head of a nail at one side of the die and positioning it with respect to the die, nail body centering means for engaging and positioning the body of the nail at the opposite side of the die, and means for successively releasing the head and body of the nail from the centering means. d

3. In a machine forshaping the heads of nails, the'combination of a punch and a die, means for relatively moving them to shape the head of a nail, nail body centering means for engaging the body or" the nail after the same has entered the die and positioning it at the side of the die opposite the nail head entering portion, andmeans for causing the nail body centering means to release the body of the nail after the punch has engaged the head of the nail. V

4. In a machine for shaping the heads of nails, the combination of a punch and a die, and means for positioning the nail for the shaping operation comprising jaws at one side of the die for engaging and positioning the head of the nail, and jaws at the opposite side of the die for engaging and positioning the body of the nail.

; 5. Ina machine for shaping the heads of nails, the combination of a punch and a die, means for relatively-moving the punch and die, centering jaws forzengaging the head of a nail-at one sideof the die for positioning thenail head, centering jaws for engaging the body of the nail at the opposite side of the die for positioning the nail body, and means for successively opening the nail head centering jawsand nail body centering jaws as the punch and die are relatively moved, I

6. Ina machine for shaping the heads 0 nails, the combination of a punch and a die, two pairsof nail centering jaws, one above and the other below the die for engaging and positioning the head and body of a nail respectively, and means 'for operating one pair of jaws by movement of the other.

7. In a machine for shaping the heads of nails, the combination of a die, means for delivering a nail endwise into said die, a

punch for pushing the :nailthrough the die,

to shape the head thereof, and a pairvof centeringijaws for engaging the body of the nail at thatside of the, die opposite the side at which the nail enters the die to. center the nail ,withreferenc e to the. die during a portion ofthe relative movement of the die and the punchy 8.; In a-machine for shaping the heads of nails, the combinationofa die adapted to receive and support a nail by its head, a punch, for pushing a nailthrough the die for shaping the head of the nail, means for delivering a nailto the die, a pair of centering j aws for engaging and positioning the body of a nail the head of which rests upon the die, and means for, releasing the body of the. nail fromthe centering jaws glaring relative' movement of the punch and 9 Ina machine for shaping the heads of nails, the combination of a die to receive and support a nail byits head, a punch for pushing the nail through the die for shaping the head of the-n'aiha pair of independently supported centering wjaws movable in opposite directions. toward'the plane of the die opening for engaging and positioning the body of a nail the head 'of'which is to be shaped, and meansfor releasing the body of the nailfrom the said centering jaws after, the punch has engaged the head of the nail. i

' 10. In a machine for shaping the heads-of nails, the combination of a die adapted to support a nail by its head, a punch means for reciprocating the die to cause the punch to vforce the nail through the die, and nail centering, means movable-with the die for engaging and positioning the body of a nail at that side of the die opposite the nail head entering portion.

11. In a machine for shaping the heads of nails, the combination of a die for supporting a nailby its head, nail centering jaws for engaging and positioning the body of a nail at that sideof thevdie opposite the nail head supporting portion, means for opening sitioning the bodyofthe nail below the die,

and means operated by movement of the upper centering jaws for opening the lower centering jaws to release the body of the nail.

18. In a machine for shaping the heads of nails, the combination of apunch, a die carrier having a die supported thereby-to provide an opening-extending transversely below the die, saidcarrier being-movable relativelyto the punch to cause a nail to be forced through the die, means for delivering anail into said die, lower centeringjaws, and means for causing them to engage and position the body of the nail in the opening below the die.

14:. In a machine for shaping the heads of nails, the combination of apunch, a die support carrying a die, means for relatively moving the punchvand die, centeringjaws for engaging and positioning the head of }a nail at one side of the die, and centering jaws for rengaging.,andpositioning the body of anail atithe opposite side of the die, said head engagingand body engaging jaws being mounted on the die, support.

15. In amachine ;for shaping the'heads'of nails, the combination of a punch, a slide carrying a die, 1neans for reciprocating the slide, centering jaws for engaging thehead of a nailabove the'die, centeringfj'aws for engaging and positioning thebodyof a nail below the die, and means for mounting said centering jaws for movement withthe' die carrying slide,

16. In a machine for shaping the heads of centeringjaws atone side of the die fort-en gaging and positioning the headof a nail, centeringjawsat the opposite side of the die for engaging and positioning the body of a nail, said/last named jawswbeing-provided nails, the combination-of a punch and a, die,

with cam portions, and means connected to the head centering jaws for acting on said eam portions to open the body centering aws.

17. In amachine for shaping the headsof nails, the combination of a punch and adie, .means for centering the head of a nail above and with relation to the die, centering. jaws,

leasing the body of the hail from the centering jaws after the punch has engaged the head of the nail. y N

1,8. In a machine for shaping the heads of nails, the combination of a punch and a die,

means for supplying nails the heads of which are to be shaped, a nail carrierfor taking a nail from the supplying means and placing it between the punch and die comprising two relatively and conjointly movable arms, and positive means for relatively operating said armsto take 'a nail from the supplying means, one of said arms being mounted for yielding movement relative to the other.

19. In a machine for shaping the heads of nails, the combination of a plurality of punches and dies for simultaneously shaping the heads of a plurality of nails, means for supplying nails for the action of the punches and dies comprising a plurality of nail carriers each including a pair of carrier arms,

a common' actuator for said. pairs of carrier arms to cause each pair of arms toatake. a;-

nail from source of supply and place it between a punch and die, one of the carrier arms of each pair being yieldingly mounted.

20. In a machine for shaping the heads of nails, the combination of a pair of punches and a pair of dies for simultaneously shaping the heads of two nails, a lifter for takin two nails from a source of supply and ii ing them opposite the space between the punches and dies, a pair of nail carriers for each nail presented by the lifter, actuating means for moving the carriers of each pair to take the nails from the lifter and place them between the punches and dies, and means for permitting one of the carriers of each pair to yield independently of the correspondin carrier of the other pair when it meets an a normal obstruction.

21. In a nail head shaping machine, the combination of a punch and a die, a lifter for taking a nail from a source of supply and lifting it to a position opposite the space between the punch and the die, nail carrier arms having nail engaging jaws, operating means for positively moving said nail carrier arms both relatively and in unison to cause said jaws to engage a nail between them and take it from the lifter, and means for yieldingly connecting one of the nail carrier arms with said operating means.

22. In a nail head shaping machine, the combination of a punch and a die, a lifter for taking a nail from a source of supply and presenting it opposite the space between the punch and the die, nail carrier arms having nall engaging aws, positive means for op- .eratingsaid arms both relatively and in unison, and a spring connectionbetween one of said arms and the operating means to permit said arm to yield when an obstruction is presented to its movement.

23. In a nail head shaping machine, the combination of a pair of punches and a pair of dies, a yoke having two nail carrier arms connected thereto and carrying nail engaging jaws, means for positively operating said yoke, two opposed nail carrier arms and jaws cooperating with the nail carrier arms and jaws connected to the yoke, and means for yieldingly operating said two opposed nail carrier arms and jaws that they may yield independently when movement of either is obstructed. I

2a. In a nail head shaping machine, the combination of a punch and a die, a lifter provided with a slot for the passage of a nail therethrough and a recessed top portion, a pair of carrier jaws, one of which is adapted to pass through and push a nail from said lifter and the other of which is arranged to enter the recessed top portion of thelifter in position to receive the nail before it is pushed from said lifter by the opposite carrier jaw, and means for operating: said jaws.

25. In a machine for shaping the heads of nails, the combination of a punch and a die, a raceway for supplying nails the heads of which are to be shaped, a stop to arrest the endmost nail, a lifter for taking the endmost nail and raising it to a position opposite the space between the punch and the die, and a nail separator movable transversely of the raceway for pushing the nails upward in the raceway from the endmost nail to provide clearance for the endmost nail as it is raised by the lifter.

26. In a machine for shaping the heads of nails, the combination of nail head shaping means, a raceway having a cover provided with an upwardly extended nail guiding portion above the end of the raceway, and a lifter for engaging and carrying a nail upward in front of the nail guiding portion of said raceway cover.

27. In a machine for shaping the heads of nails, the combination of nail head shaping means, a raceway, a lifter for taking a nail from the raceway and lifting it. a stop for the endmost nail presented by the raceway, and a guide extending above the end of the raceway a sufficient distance to prevent the nail from falling from the lifter as the latter rises to its uppermost position.

28. In a machine for shaping the heads of nails, the combination of nail head shaping means, a raceway, a lifter for taking a nail from the raceway and lifting it. a stop for the endmost nail presented by the raceway,

fagl ide extending above the: end of the raceway to prevent the nail from fallingvfrom. f,the lifter as the latter rises, and a nail separator constructed t'o push the nailsupward ih the raceway; andthe end nail into the lifter to provide clearance between the head of the nail in the lifter andf'the nails the raceway andbetween the head of the'nail in I said gnidejas the lifter "rises.

. 3OQA die for shaping the heads ofnails comprising a die carrier" having 5 shoulder, a die plate having a die opening fer-sha ingjthe heads of nails; blocks: interposed between the die plate and;shoulder to provide a spacehetween' the plate and shoulder; and 'me'ans'Lfor. securing the die plate to said bl'ocks f 31. In a machine-for shapingthe heads of nails,"the combination Om die slide carrying 7 a; die, ,means; for operating it; nail head centering aws, pl v'otally mounted onthe die slide, connectionshetween said jaws to cause eachof saldj aw's to movewhen oneof them is moved tdopen or close'the jaws, and

movement ofthe die slide; Y

'32. "In a: machine for shapingthe heads of nails,the comb'inationof a punch, a die slide carrying a'die, means for reciprocating the die slide, a tubular chute connectedto the been shaped out of the machine, and a packing through V which the tubular chute recipe rocates to prevent chips-passing" with the "nails to the point ofdelivery.

'mea1'1sr.iEox-' operating one of isaid jaws-by die toca-rry nails" the heads of Which haveiy-v .331 In a machine forshapingthe heads nails:the-combination of a pnneh a die slide carryinga die; v means for reciprocating the 'dielshde, a: chippairto receive chips fornzuad dnring lthe 'nail headshaping operati'on', a-tuhnlar'chute'connected to the" die and passing below thechip pan, and a packing between the chip pan-amidtubular chute-to prev'e'nt chips passing; to the pointof delivryof the nalls; the-headsmf whichhave heen'sh'a'ped In testimony Where0f I have signedtlny nameto' this'specification; f

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