US1667338A - Apparatus for forming double-headed nails - Google Patents

Description

April 24, 1928.

N. YATES, JR

APPARATUS FOR FORMING DOUBLE BEADED NAILS Filed May 23, 1925 2 Sheets-Sheet 1 o a 1 8 0 [L9 L gnmni'oz /5 A afhanieI yafes,c/rt

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April 24, 1928.

1,667,338 N. YATES, JR

APPARATUS FOR FORMING DOUBLE BEADED NAILS Filed May 23. 1925 2 Sheets-Sheet 2 afhaniel yafes jr:

Patented Apr. 24, 1 928.

UNITED STATES PATIENT OFFICE.

NATHANIEL YATTEE, JR., OF AUGUSTA, KENTUCKY, ASSIGNOR TO I. A. NEIDEB COI- PANY, YOF AUGUSTA, KENTUCKY, A CORPORATION OF KENTUCKY.

V APPARATUS FOR FORMING DOUBLE-HEADED NAILS.

Application filed May 23/1925. Serial No. 82,459.

An object of my invention is to provide an apparatus for forming double headed nails.

Another object is to provide an apparatus for the purpose stated by means of which double headed nails may be made with greater uniformity-and with greater speed.

Another object is to provide an apparatus which will permit the use of less expensive stock and a relatively smaller quantity of said stock per nail.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which:

Fig. 1 is a side elevational view of an apparatus for successively performing the operations of making the double headed nails of my invention.

' Fig. 2 is a plan view of a dial plate and the mechanisms co-operating therewith and forming details of the device shown in Fig. 1.

Fig. 8 is a cross sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a cross sectional view taken on line 44 of Fig. 2.

Fig. 5 is a cross sectional view on line 5-5 of Fig. 3.

Fig. 6 is a reduced perspective View of a washer feeding mechanism employed in the apparatus of my invention.

Fig. 7 is a view, partly in cross section, showing the component parts of the double headed nails before they are secured on one another.

Fig. 8 is across sectional view of a completed nail made by the method of my invention.

Double headed nails have heretofore been made'by utilizing nails having an elongated head structure and passing the shank of the nail through a collar of cold rolled steel, the parts being secured together by a driving fit of the nail in the perforation in the collar. This process is expensive in that the collar stock is necessarily formed from strip steel which is perforated, after which the nail is driven into the perforation, following which the collar stock is cut from the strip. It was necessar to use cold rolled steel for this old method because if the washer or collar stock be harder than the nail, it will strip the nail.

It is also found that it is too expensive to use circular washers cutfrom cold rolled steel. Because of the driving fit in the nail in the washer, a very heavy machine was required to perform the driving operation.

The method of my invention permits use of hot rolled steel for the collar member and the stock for said collar may be inexpensively secured from scrap stock. Nails made by the method of my invention may be produced in quantities by utilizing an a paratus, as is described herein. Washers rom hot rolled stock may be inexpensively made in a circular form which is adapted to be readily fed from a hopper. The method of my invention comprises the employment of a nail 10 having an elongated head portion 11. The nail 10 is passed through a washer 12 wh ch may be made of hot rolled stock and which is quite inexpensive. The perforation 13 in the washer 12 is slightly larger than the shank of the nail 10. The diameter of the elongated head 11 is somewhat greater than the diameter of the perforation 13 so that the washer will abut the shoulder 14 on the head 11. The nail and washer, positioned as shown in Fig. 7, are placed upon a bell mouthed swage nunch such as 15 with the cutting or swaging edge 16 engaging the under side of washer 12. The bore 17 of the bell mouthed punch is adapted to accommodate the shank of the nail 10 and to position said nails in the center of the washer. A cup-shaped plunger is adapted to strike the upper face of washer 12 and also the head 11', whereupon the stock or washer material adjacent the perforation 13 is swaged inwardly and rigidly around the shank of the nail so that a substantial and uniform prodnot is attained. For quantity production of the nails of my invention, I have provided a synchronized device for taking the washers from a hopper 18, dropping a nail 10 through the perforation 13 in 'a washer such as 12, positioning the washer and nail over a swage 15, swaging a nail to the washer and finally completing the article.

The apparatus of my invention may be conveniently produced by employing a light duty punch press such as 19 and equip ping it with certain hereinafter described mechanisms which are all synchronously actuated by the punch press 19. The unch press 19 is provided with the usual ta le 20 which carries on its upper face a. dial plate or revolving table 21 having spaced perforations 22 of a diameter adapted to receive one of the washers 12. As shown in Figs. 1 and 6, a revolving hopper 18 is adapted to discharge the washers 12 down an inclined chute 23 and to position said washers upon a pair of fingers 24 above one of the perforations 22 in the dial plate or revolving table 21. The upper face of the end portions of fingers 24 are slightly hollowed or dlshed as at 25 so that the washer will be positioned substantially over a fixed point. The rotatable table 21 is adapted to be intermittently actuated by means of a pawl 26 mounted upon a reciprocating arm 27 and yieldingly retained in engagement with the edge of the revolving plate 21 by any suitable means such as a spring 28. The revolving table 21 carries notches 29 in which the end 30 of the pawl 26 may seat after which longitudinal movement of the reciprocating arm 27 will cause the pawl 26 to rotatably actuate the revolving plate 21. A pivotally mounted lever 31 carries a stop pin 32 which intermittently engages the periphery of revolving plate 21 and. is adapted to enter the notches 29 for accurately positioning the plate 21 after each impulse or partial rot-ation. A spring 33 serves to normally retain the stop pin 32 in engagement with the plate 21 while the pin 320, on. reciprocating arm 27 intermittently moves the lever 31 and stop pin 32 outwardly until the pawl 30 has moved one of the notches 29 out of registry with the stop pin 32. The reciprocating arm 27 and pawl may be conveniently actuated in synchronism with the other mechanisms of the device by means of a pivotally mounted arm 34 operated from the main drive or crank shaft 35 of the punch press 19. A spring cushioned plunger 36 is supported upon a bracket 37 carried by the main plunger 38 of the punch press 19. The main plunger 38 also carries the several remaining punches and plungers of the device which will be hereinafter described. In this way perfect synchronism of the moving parts may be attained with a minimum of simple parts. The spring cushioned plunger 36 is adapted to descend with the main plunger 38 and to engage a washer held on the dished portion 25 of the fingers 24. The fingers 24 are adapted to be yieldingly separated as a washer 12 is forced downwardly on the dished ortions 25 thereof so that said washer may e pushed into one of the perforations 22 which has been brought into alignment with the fingers. In this way, the hopper 18, washer slide 23 and fingers 24 serve to keep a constant supply of washers upon the dished portion 25 of the fingers and the springc-ushioned plunger 36 will push one of the washers into the other perforations 22 as the revolving plate is intermittently brought to rest. A washer 12, having been deposited in one of the perforations 22 in the revolving plate is carried upon the upper face of the table 20 and there it is brought to rest over a perforation 39 in the table 20. The perforation 39 is tapered and has its smallest diameter at the upper face of said table. A split bell mouthed sWa-ge 15 comprising semi-cylindrical parts having a spring 40 interposed between them is seated in a depression 41 upon a rocking member 42 pivotally mounted upon a suitable depending lug 43. A ram or plunger 44 secured to the main plunger 38 is adapted to descend upon the end 45 of the rocking member 42 and to raise the split swage 15 so that the sharp. swaging edge 16 rises slightly above the upper face of the table 20 at which time the members of said swage are clamped tightly upon one another and serve to clamp about the shank of a nail 10. A nail feed mechanism, indicated generally as 46, is adapted to depress one of the nails 10 into perforation 22 and through the perforation 13 in the washer 12 contained therein. The members of the swage 15 are separated by the action of spring 40 when the nail enters the washer and bore 17 in the swage, they swage being closed by the action of plunger 44 and rocking member 42 for clamping the nail and raising the swagin-g edge 16 of the swage 15 above the table. A hammer 47 having a recess 48 therein descends at the same time upon the head 11 of the nail 10 and swages the material of the washer 12 inwardly about the shank 10 of the nail. As will be apparent from Fig. 3, the hammer 47 drives the shoulder 14 of the nail into abutment with the upper face of the washer 12 just prior to the swaging action, so that the washer is definitely positioned in abutment with the shoulder at the time the swaging action takes place.

The nail feed 46 comprises a pain of spaced bars 49 and 50 having a way 51 between them. posed at an angle to the table 20 as shown in Fig. 1 and the nails 10 are adapted to have the shoulders 14 thereofride upon the upper faces of said bars whereupon the nails will slide downwardly by gravity. A pair of spring fingers 52 are reciprocally mounted in alignment with the perforation 39 in the table 20 and are adapted to be drawn into the nail feed 46 to engage a nail 10 and to be subsequently projected outwardly over the center of perforation 39 in the table 20. The fingers 52 are again withdrawn as the hammer 47 descends so that the fingers are entirely clear of the hammer by the time said hammer reaches the level of the fingers 52. This reciprocating move- 'ment is accomplished by means of a bell crank lever 53 engaging a slotted block 54 upon which the spring fingers 52 are secured by any suitable means such as screws 55. Movement of the bell crank' lever 53 is The bars 49 and 50 are diseffected by means of a U-shaped member 56 which is secured to the main plunger 38 of the, punch press so that upward and downward movement of the plunger 38 will effect a rocking of the bell crank lever 53 about its pivotal mounting 57, so that the block 54 and spring fingers 52 attached thereto, are reciprocated into and out of the nail feed member 46 for grasping a nail 10 and projecting it over registering perforations 22 and 39 in the revolving plate 21 and table 20 respectively where it is subsequently passed through a washer 12 which is swaged thereon as heretofore described.

As previously set forth, the various moving parts are actuated in synchrouism. The hopper 18 presents a continuous supply of washers 12 to the fingers 24. The p unger 36 pushes one of the washers 12 into each successive perforation 22 as it is brought to rest in registry with said plunger. The nail feed device 46 presents a nail point downwardly over the perforation 39 and split swage 15 through the agency of the spring fingers 52. At the time the nail is introduced through the washer and into the split swage 15, the component members are separated or in an open position at the bell mouthed end carrying the swaging edge 16. As the hammer 47 and plunger 44 descend, the spring fingers 52 are withdrawn whereupon the bell mouthed swage 15 is raised at the time the hammer 47 reaches the upper face of the washer 12. Thus it will be seen that the force of descending hammer 47 and the force of descending plunger 44 through rocking member 42 are directed to opposite sides of the washer so that the cutting or swaging edge 16 of the bell mouthed punch 15 will swage the material in the. washer 12 inwardly about the shank of the nail at the same time the shoulder 14 of the nail is being driven against the washer. In this way, a very effective connection is made between the nail and washer. The table 20 is provided with an arcuate slot 58 extending from the perforation 39 for a distance equal to that through which the revolving table 22 moves during one impulse. At this place, the table 20 is provided with a perforation I 59 of sufficient diameter to permit the finishcd double headed nail to drop time through into any suitable container. A suitable plunger 60 is provided to cause the nail to be forced through the perforation 59 in the event that it should tend to hang therein.

The mechanism just described may be provided by relatively lighter mechanisms than was required for the old driving feed mechanism which required considerable power to operate. The new double headed nail made by my improved method, is of lighter weight than the old square collar type nail and consequently a greater number of nails per pound may be had by the new method. This is advantageous to/the shipper, to the workman and to the purchaser. The shipper can ship a greater number of nails for a lesser transportation cost, the workman may carry a greater number of nails in his work apron when he is upon a scaffold and the useror purchaser will get more, nails per pound and more nails for less money than he would get if he purchased nails of the old square collar What I claim is:

1. In a device of the class described the combination with an intermittently rotatable table having perforations therein, means for inserting circular washers in the perforations in said table, means for inserting a headed nail in the perforation in the washer, a sectional bell mouthed swage adapted to clamp about the nail with the washer in engagement upon the mouth of the swage, and plunger means adapted to drive the washer and nail against the swage whereby the washer material is forced into binding relation upon the'nail.

2. In a device of the class described the combination with an intermittently rotatable table having perforations therein, means for inserting circular washers in the perforations in said table, means for inserting a headed nail in the perforation in the washer, a sectional bell mouthed swage adapted to clamp about the nail with the washer in engagement upon the mouth of the swage, plunger means adapted to drive the washer and nail against the swage whereby the washer material is forced into binding relation upon the nail, and means for effecting synchronized movement of the rotatable plate, washer inserting means, nail inserting means and swaging means.

3. In a device of the class described the combination with a stationary table, a perforate rotatable plate mounted upon the stationary table, means for imparting intermittent motion to the rotatable plate, a hopper and feed mechanism for inserting washers in the perforations in the rotatable plate, a nail feed mechanism for inserting nails in the washers disposed within the erforations in the rotatable plate, a split ell mouthed swage adapted to open to receive a nail and to close for clamping said nail with a washer resting upon the bell mouth of said swage, and plunger means for driving the washer and nail against the bell mouthed swage.

4. In a device for forming double headed nails the combination with an intermittently movable perforate member for receiving washers, means for inserting washers in the perforations in said member, means for inserting headed nails in the perforations in the washers, a split bell mouthed swage adapted to clamp about the nail with the washer in engagement upon the mouth of said swage, and plunger means adapted to drive the washer and nail against the swage whereby the washer material is swaged into binding relation with the nail.

5. In a device for forming double headed nails the combination with an intermittently movable perforate member for receiving washers, means for inserting washers in the perforations in said member, means for in"- serting shouldered nails in the perforations in the washers, a split bell mouthed swage adapted to clamp about a nail with a washer in engagement with the mouth of said swage, and means for driving the washer and swage together whereby the washer material is swaged into binding relation with the nail.

6. In a device for forming double headed nails the combination of a sectional bell mouthed swage, means for mounting said swage with the mouth portion of the sections thereof spaced for receiving and discharging a nail shank diametrically through the swage, means for efiecting closin of the sections of said swage whereby to 0 amp a nail shank, means for moving a headed nail and a loosely associated washer into said last mentioned position with the shank of the nail clamped in the swage and the washer resting upon the mouth of said swage, means adapted to abut the top face of the washer and the head of the nail and means for simultaneously raising the swage whereby the swage is caused to force a portion of the washer stock on the lower face of the washer inwardly for forcing the stock adjacent said lower face into binding relation with the shank of the nail.

7 In a machine of the class described the combination of a table means for positioning and moving perforate washers, a nail feed device for depositing a shouldered nail in the perforation in each washer, a vertically disposed sectional swage member, means to separate the sectlons of the swage to receive a nail, means for closing and raisin the swage whereby the nail is clamped and one face ofthe washer is caused to rest upon the swage and means for simultaneously striking the opposite face of the washer.

8. In a device of the class described the combination of a slotted table member, a movable table member having a perforation therein above the slot in the first mentioned table, a rocker member pivotally mounted beneath the tables, a normally opened sectional swage carried by said rocker, a hammer adapted to descend into the perforation and a ram for moving the rocker about its mounting for raising the swage into the slot in the table whereby to close the swage.

9. In a device of the class described the combination of a movable member having perforations therein, means for depositing perforate washers in said perforations, a stationary member beneath the movable member and upon which the washers are supported and over which said washers are moved by the movable member, said sta tionary member having a way therethrough, means for depositing a shouldered nail in the perforation in each washer, said nails being adapted to extend through the way in the stationary meinber, a sectional swage member having normally separated sections between which the depending nails may move, means for bringing together the portions of the swage in clamping engagement about a nail and for moving the swage into abutment with thelower face of the washer thereon and hammer means operative on the opposite side of the washer when the nail is clamped in the swage whereby the stock about the perforation on one side of the washer is swaged inwardly into binding relation with the nail.

In testimony whereof, I have hereunto subscribed my name this 19th day of May,

NATHANIEL YATES, J a.

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