US1177926A - Machine for putting coil-guards on safety-pins. - Google Patents

Description

E. CAIRNS.

MACHINE FOR PUTTING COIL GUARDS 0N SAFETY PINS.

In Ve tor mew! Tm: COLUMBIA PLANOGRAPH C0-. WASHINGTON, D. c.

E. CAIRNS.

MACHINE FOR PUTTING COIL GUARDS 0N SAFETY PINS.

APPLICATION FILED MAY 14. I915.

Patented Apr. 4, 1916.

4 SHEETSSHEET 2.

A95- 1' I 1 3 3000000 e 7 e6 M hf II i" 1 6 HI I h v mummummmmmmgnmu 3 e mmuu ggm I 6 lunmmm li X, k 4 5 a/ o In ven t Or: W( M Attys' THE COLUMBIA PLAQIOGRAPH co., WASHINGTON, n, c.

E. C'AIRNS.

MACHINE FOR PUTTING COIL GUARDS ON SAFETY PINS.

APPLICATION HLED MAY 14. I915- Inventor:

Patented Apr. 4,1916.

4 SHEETS-SHEET 3 E. CAIRNS.

MACHINE FOR PUTTING COIL GUARDS ON'SAFETY PINS.

APPLICATION FILED MAY I4, I915.

r O t m w I Patented Apr. 4, 1916.

4 SHEETS-SHEET 4 THE COLUMBIA PLANouRAYH 50.. WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

EDWARD CAIRNS, 0F MONTCLAIR, JERSEY, ASSIGN'OR T'O CONSOLIDATED SAFETY PIN COMPANY, OF BLOOMFIELD, NEW JERSEY, A CORPORATION OF NEW J ER-SEY Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed May 14., 1915. Serial No. 27,983.

Safety pins which have the body wire coiled between the back and the point member are commonly provided each wlth a guard for the coil to prevent the fabric.

which is entered by the point member from becoming entangled in the coil. A highly eliicient form of such guard consists of .a small piece of thin sheet metalwhich is perforated to receive the point member and is crimped on the coil.

The object of this invention is to produce a machine by which guards of the general character of those referred to, whether of the same form or not, may be applied automatically and rapidly to the pins, the guards being preferably formed in the same machine.

The invention will be more fully eX- plained hereinafter with reference to the accompanying drawings in which it is illustrated as embodied in a practical and efficient form of mechanism.

In the drawingsFigure l is a view of the machine in perspective, actuating mechanism which is not necessary to an understanding of the invention being omitted and some parts being broken away. Fig. 2 is a detail top view showing the traveling die- )late with some of the parts associated l therewith. Fig. 3 is a view of the machine in elevation as seen from a point of view nearly opposite that of Fig. 1, on a slightly larger scale than that of Fig. 1 and with some parts broken away. Fig. at is a view of the strip of sheet metal from which the guards are formed, a portion of. the strip being shown in blank, another portion with the holes for the pin points punched therein, and another portion with the guard blanks punched out. Figs. 5 and'6 are detail views of a guardin successive stages of formation. Fig. 7 is a detail view, partly in section, and on a considerably larger scale than that of Fig. 3, showing the strip from which the guards are formed, withthe devices for first punching the strip and then.

blanking and drawing the guard with themeans for supporting the strip during these operations and the traveling die-plate which cooperates with the blank and drawing device. Fig. 8 is a perspective view of the devices which are directly concerned, with the feeding and bodily movement of the safety pins upon which the guards are to be placed, as seen generally from the point of view of Fig. 1, but on a larger scale and with the holding plate in section and some parts broken away. Figs. 9 and 10 are de tail views of the same mechanism in elevation and in vertical section on different planes. Fig. 10 is a detail perspective view of a portion of the devices shown in Figs. 9 and 10. Figs. 11 and 12 are detail views of a portion of the pin feeding devices. Fig. 13 is a detail view in section illustrating particularly the devices for closing the pin.

charging the completed and closed pin from the machine. Fig. 15 is a perspective view, on an enlarged scale, of the pin with the guard in place but before it is crimped in. Fig. 16 is a detail view in section on the plane indicated by the line 16-16 of Fig. 15. Fig. 17 is aview in perspective, on an enlarged scale, of the pin closed and with the guard crimped inplace. Fig. 18 is a view in section on the plane indicated by the line 18-18 of Fig. 17. I

The machine illustrated herein as an embodiment of the invention comprises a bed-- plate 4; upon which are supported certain parts of the mechanism hereinafter referred to, the bed-plate being provided also with a standard a which supports certain other parts of the mechanism hereinafter referred to, and also supports at its upper end the main actuating shaft of the machine, with its appurtenances, which shaft and appurtenances, being substantially such as arefound in any ordinary punch press, are not necessary to be shown herein. The bed-plate a is also provided with a circular boss a i I The annular, traveling die-and-guard carrier Z) is supported on the bed-plate aand is guided 'by the boss 6%. It is provided at. equally spaced intervals with dies 1) each formed at the top with a recess. 5 suitably shaped for the formation of the guard inv conjunction. with the blanking and drawing plunger hereinafter referred, to, having a.

Fig. 1.4; is a detail view in section illustrating particularly the devices distrefoil outline at the top, and entered, to the center, by a radial slot 6 from the edge of the carrier Z). Secured to the carrier Z) is a ratchet ring 6 which, in order that the carrier may be advanced with a step by step movement, is engaged by a driving pawl 0 and by a holding pawl c. The driving pawl 0 may be actuated by any suitable means. As shown in Figs. 1 and 2 of the drawings, it is pressed by a spring 0 toward the ratchet ring, is pivoted at 0 upon a slide a and is provided with a handle 0 by which it may be disengaged from the ratchet ring. The slide 0 is actuated from the actuating shaft of the machine, in synchronism with other mechanism, through a link 0 a bell crank 0" and a rod 0 Means are also provided for insuring the accurate positioning of the carrier before the several operations, which must be performed while the carrier is at rest, are initiated. For this purpose the carrier is provided with holes Z2 to be engaged in succession, after each'forward movement of the carrier, by a clutch-controlling pin cl guided for vertical movement in a fixed guide cl and carried by an arm (Z from a vertical rod (Z which is actuated at the proper time from the main actuating shaft and is connected, in any suitable manner, with the clutch through which the main actuating shaft is driven.

The guards which areto be applied to the pins are preferably formed in the machine itself, being placed in the dies 6, and are then transported in the carrier, from the point at which they are formed, in succession, to the point at which they are engaged in succession by the pins to which they are applied. They are formed from a strip or ribbon e of sheet metal which is fed into the machine, with a step-by-step movement, by any suitable strip feeding device. As shown such device may consist of a pair of rollers 6, one of which is actuated, with a step-bystep movement, by a pawl arm 6 which is struck and moved in one direction by a pin e carried by the reciprocating head f hereinafter referred to, and is returned by a spring, as usual in devices of this character, the details of which are well known and need not be illustrated or described herein. The strip is fed across the carrier Z; through a strip guide 6 which is provided with a punch-hole e and with a plunger opening 6 On the under side ofthe reciprocating head 7" are mounted a punch e in line with the hole efland blanking and drawing plungers e and e, the former cutting the blank from the strip in conjunction with the opening e in the guide 6 and the-latter, which is central withrespect to the former and also has a delayed movement with respect thereto carrying the blank, when it has been cut, down into the die and giving it the form member of the pin, and the plungers e and 6" cutting from the strip the blank which subsequently forms the guard, and forming it as described, each blank including the hole 6 previously formed. The shape of the blank is indicated by the holes 6", shown in Fig. 4, left in the stripby the cutting out of the blanks. As each blank is cut out by the plunger 6 it is drawn into shape, as shown at g in Fig. 5, by the plunger 6 which forces it into the cavity of the die I). At the next forward movement of the carrier 5 the die 6 which has just received the guard, is carried forward into line with another plunger 6 also carried by the reciprocating head f, and the ears g, which at the first operation were left standing upright, as shown in Fig. 5, are turned outwardly, as shown in Fig. 6.

When the guard has thus been formed, with the hole a therein, it is transported by the carrier 6. to the position where the point member of the pin is made to pass through the hole 6 in the guard and its coil is brought into juxtaposition to the guard. Before the devices for moving the pin bodily into engagement with the guard are described, it will be necessary to describe such means as are shown for feeding the pins, one at a time, into position to be engaged by such devices. The pins might be de livered to the feeding devices directly from the pin forming machine, without the intervention of the hand, but they may be placed by hand in or on the feeding means. As shown in the drawings, the open pins are supposed to be placed by hand on an in-i clined rail h, with the point members all at one side and the backs at the other side and resting at the coil end on the upper edge of the rail h,-the inclination of which is sufficient to cause the pins to slide toward 7 the lower end. Guard rails it, spaced slightly from the feed rail 72., may be pro upon another as they are placed on the rail h and slide downwardly thereon. At the lower end of the rail h is'a pin releasing device, shown particularly in Figs. 9,11 and 12, adapted to release one pin at atime and permit it to pass into. position to be engaged by the devices which move it onward. This pin releasing device comprises .a fiat spring 7L2 secured over a recess if in the "rail 7L, flush with the surface, and provided at its lower end with one or two projecting stops it. Arranged to cooperate with the spring 72?, so as to depress the same and permit the lowermost pin to escape over the stops it,

but preventing the escape of the other pins on the rail h is a spring depressor 7L5 which has a narrow tooth h adapted to make contact wit-h the spring between the lowermost pin, which rests against the stops 72. and the next pin, as shown clearly in Fig. 11. This depressor k is operated at the proper time from the main actuating shaft of the machine through the reciprocating head f, the depressor if being carried by a lever if which is moved in one direction by a spring it to withdraw the depressor and is moved in the other direction, to depress the spring k by a finger h carried by the reciprocating head f. Each pin leaves the rail h with the point member substantially vertical and directed downward and in this position the pin is pushed down to cause the point member to enter the hole'c in the guard g which is then in line with the point member of the pin, the downward movement of the pin being continued until the coil of the pin enters the cup-shaped guard. It is necessary, however, that the pin be held, as it leaves the rail h, with the point member vertical, but in such manner that the pin can be pushed down, and that means be provided for truing or correcting the position of the pin, in case it should not be placed accurately, and for guiding it in its downward movement until such movement is completed. Such devices will now be described.

' As shown particularly in Figs. 3, 8 and 10, there is placed opposite the discharge end of the pin feeding devices a guide plate 2', which is grooved vertically as at e" and i but otherwise opposes to the pin feeding clevices a smooth face. Cooperating with this plate 71 is a presser arm i which is pivoted at 2' on a fixed standard, has a straight lower arm 2' has connected thereto at the other side of the pivot a rod 2' under spring tension, which tends to hold the straight arm normally toward the plate 2', and an arm 2' with a toe i which is adapted to be struck, in the downward movement of the reciprocating head f, by a finger 71 carried by the head, so as to move the straight part i of the presser away from the plate suihciently to release the pin which has theretofore been held by its pressure against the plate 11 and to permit the next pin from the feeding devices to enter between the straight part i and the plate 2' so as to be grasped and held thereby as soon as the upward movement of the head f permits the presser to be swung on its pivot by the spring rod 2'. The presser is preferably arranged to bear against the shield of the pin and two horizontally movable, spring-pressed presscr blocks and 2', having rounded ends, as shown clearly in Fig. 8, bear against the coil of the spring as it is pushed down pressing it against the plate 2'. These two pressure devices, the pivoted presser 2' and the presser blocks 5 and i retain the pin with its point member vertical but permit it to be pushed down in this relative position.

slightly from the line of travel of the point member, and a truing plate 14 which has in its forward edge a notch 7%, and is adapted to enter the space or slot between the upper and lower fixed plates 76 and 7c. The truing plate is secured to an arm which is pivoted on a standard 766 and is acted upon by a spring 1: so that the truing plate is held normally in the position shown by full lines in Figs. 9 and 10, with the notch 7J forming a guide for the point member. The shoulder of the arm 70 as shown in Fig. 9, stands in the path of a finger 70 which is carried by the reciprocating head 7, so that as the head approaches the limit of its downward stroke the finger 72 strikes the shoulder of the arm 70 and swings the arm from the position shown by full lines in Figs. 9 and 10 to the position indicated by dotted lines in Fig. 9, whereby the truing plate 76 is swung away so as to permit the coil of the pin to pass it in its continued downward movement, the truing plate being held in this position long enough to permit the point member of the next pin from the feeding devices to drop into position to be engaged by the truing plate when it is permitted to swing back into normal position.

Vhile the pin is thus held yieldingly and guided it is pushed downward by two fingers m and m which are carried by the reciprocating head f and are guided in the grooves z" and 2' of the plate 2'. The lower end of the finger m is suitably formed to engage the coil end of the pin while the lower end of the finger m is suitably formed to engage the back of the pin.

Since the point of the pin must enter the comparatively small hole 6 in the guard, it is desirable to provide a guide for the point of the pin just above the carrier Z), which guide will yield to permit the full movement of the coil end of the pin. The point guide is therefore formed as a suitably shaped recess n. in one side of a block a" which is carried by an arm n as shown in Fig. 8. i The arm of is pivotally mounted on the portion a of the bed-plate a and has connected thereto a spring 70* by which it is held yield ngly 1n the position shown in Figs. 1 and 8, being capable of being moved &

away from its normal position by the coil of the spring as it descends.

When the point member of the pin has been passed through the guard, as already described, the next step is to crimp the guard or to pinch in the ears 9 of the guard so that the guard shall be retained in place on the coil. Accordingly the pin and l the guard, with the point member of the pin resting against a cam rail 0 and with the guard still held in the die 5, are carried along from the pin inserting devices to a position for the operation of the crimping devices. The latter comprise two crimping jaws 79 pivoted in a support p carried by the reciprocating head i, as shown in Figs. 1 and 3. The jaws are provided each with a pin 72 one of which is shown in Fig. 3, which project through the side of the support 2) and are acted upon by a spring p so that they are held normally apart. As the head 7 descends, the jaws, which are suitably curved on their lower ends, pass down outside of the ears 9 and are then caused to move toward each other by the opposite inclined walls of the trefoil recess in the top of the die, thereby pinching in the ears 9 so that they meet or nearly meet within the coil of the spring and thereby secure the guard in place.

The next operation, which may be simultaneous with the crimping of the guard, is the closing of the pin, that is, the engage ment of the pin point with the shield. As the pin moves on with the carrier 7), still being held with the guard in the die, the point member is supported by a cam rail 0. l/Vhile it is thus supported a finger 1', see Figs. 3 and 18, carried by the support p in the descending movement of the reciprocating head, being suitably forked at its lower end as shown plainly in Fig. 3, strikes the projecting back member of the pin and forces it down until its shield is engaged by the pin point.

In view of the possibility that in the operation of closing the pin the coil end might. be lifted slightly out of place, so that it might not be properly engaged by. the extracting devices hereinafter described, the coil end is settled into place, at the same time with the closing of the pin and with the crimping of the guard, by a finger 7'' which is also carried by the support 79, between the jaws p. A guard railr as shown in Fig. 13, may be provided to prevent the pins from jumping up and for holding them down in proper position for the operation of the finger r. extracted from the die, in which the guard plate, crimped upon the coil, is still held frictionally, and is ejected from the machine. The extraction of the pin from the carrier is accomplished by a gripping device s which is carried by a support 8' on Finally the closed pin is.

' are adapted to engage the coil of the pin,

while the two fingers 8 being longer, are

adapted to engage the pin near the shield.

end. The object in view in providing the two sets of fingers is to lift the pin with a parallel motion and without causing any turning of the coil end in the die, which might injure the guard. The gripper is caused to close upon the pin, as the reciprocating head completes its downward movement, through the cooperation of the curved fingers a with the sides of the dished, trefoil recess in the top of the die. The two grippers are held frictionally but quite tightly in the support .9 and therefore lift the pin from the carrier as the reciprocating head f ascends. As the reciprocating head approaches the limit of its upward movement it is necessary that the grippers be opened so as to release the pin. For this purpose there is pivoted in the support 8 an opener s which has at its inner end a nose 8 adapted to enter between the grippers s and s to spread them apart at the proper time, and an arm 8 which is engaged, at the proper time, by astop's This stop a is so supported from the bed-plate a or from the standard a, as may be convenient, that it is engaged by the arm 8 as the reciprocating head approaches the limit of its upward movement, so that the pin is released by the grippers at or near the highest position reached by it. As the pin falls from the grippers, it falls upon a plate t which is hinged, with a spring hinge t, at the upper end of a standard 25 fixed on the boss a of the bed-plate. As the reciprocating head 7 descends, the plate 25 is pushed back by the support 8, out of the way, but as the head ascends the plate 26 swings forward quickly, intercepting the falling pin and di recting it away from the carrier into the discharge vchute It will be understood that although the machine and its operations have been described with reference to the operations performed upon a single guard and a single pin, each die of the carrier 6 receives a guard and as each guard is brought in line with the pin feeding devices it receives a pin, the guard being then crimped and the into operative relation with changes in details of construction and arrangement within the scope of the claims may be made to adapt the machine for operation upon pins of diflerent sizes and different styles.

I claim as my invention 1. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for supporting a plurality of pins in readiness to move forward, means for releasing the pins one by one from the pin supporting means, and means of moving each pin as it is released its coil guard as the latter is presented.

2. A machine for assembling safety pins and'coil guards therefor comprising a carrier for the guards, an inclined rail upon which the pins are placed, means for releasing the pins one by one from the rail, and means for moving each pin in succession into operative relation with its coil guard as the latter is presented. 3. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, an inclined rail upon which the pins are placed, a flat spring parallel with the rail and having a projection to engage the lowermost pin, and a reciprocating device having a point to enter between the lowermost pin and the next pin and to depress the spring so as to release the lowermost pin.

4. In a machine of the character described, the combination of pin feeding devices, a plate against which each pin is delivered from the feeding devices and in contact with which it slides, and a yielding, spring-presser adapted to hold each pin as it is delivered by the feeding devices frictionally against the plate.

5. In a machine of the character described, the combination of pin feeding devices, a plate against which each pin is delivered from the feeding devices and in contact with which it slides, a yielding, spring-presser adapted to hold each pin as it is delivered by the feeding devices frictionally against the plate, and means for advancing the pin while it is held frictionally by the presser.

6. In a machine of the character described, the combination of pin feeding devices, a plate against which each pin is delivered from the feeding devices and in contact with which it slides, a yielding, springpresser adapted to hold each pin as it is delivered by the feeding devices frictionally against the plate, means for advancing the pin while it is held frictionally by the presser, and means for truing the position of the pin. 7

7. In a machine of the character de I scribed, the combination of pin feeding devices, a plate against which each pin is deand coil guards therefor comprising a'carrier for the guards, means for advancing the carrier with a step-by-step motion, devices for supporting a plurality of pins and feeding them forward by gravity, means to release the pins one by one from the feeding devices, and means for moving each pin as it is released into operative relation with its coil guard as the latter is presented.

9. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for advancing the carrier with a step-by-step motion, devices for supporting a plurality of pins and feeding them forward by gravity, means to release the pins one by one from the feeding devices, means for holding each pin frictionally when it is released, and means for moving each pin when it is-released into operative relation with its coil guard as the latter is presented.

10. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for advancingthe carrier with a step-by-step motion, devices for supporting a plurality of pins and feed ing them forward by gravity, a device for truing the position of the pin as it is released from the feeding devices, and means 7 for moving each pin as it is released into operative relation with its coil guard as the latter is presented.

' 11. A machine for assembling safety pins and coil guards therefor comprising a. carrier for the guards, means for advancing the carrier, feeding devices for the pins, a reciprocating notched plate to true the position of and guide each pin as it is released from the feeding devices, and means for moving each pin into operative relation with its coil guard as the latter is presented.

12. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for advancing the carrier, feeding devices for the pins, means for moving each pin as it is released from the feeding devices into operative relation with its coil guard as the latter is presented, and a yielding point guide to direct the point of the pin as it is'so moved. V

13. A machine for assembling safety pins and coil guards therefor comprising a carrier having a series of dies to receive the guards, means for advancing the carrier step by step to place each guard in position for receiving its pin, and means for crimping the guard on'the coil of the pin While the guard is in the die.

1 f. A machine for assembling safety pins and coil guards therefor comprising a ro tary carrier having a series of dies to receive a series of coil guards, means for advancing the carrier with a step-by-step mo tion to bring each guard in succession to a point to receive the pin, and means for crimping the guard on the coil of the pin while the guard is in the die.

15. A machine for assembling safety pins and coil guards therefor comprising a carrier having a dished recess to receive the guard and the pin, a reciprocating head, and pair of pinching jaws carried by said head and adapted to cooperate with the dished recess to crimp the guard about the coil of the spring. 7

16. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for causing the point member of each pin to pass through its coil guard and place the coil in operative relation with the guard, and means for crimping each guard about the coil of its pin while the guard is in the die.

17. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for feeding the pins, means'for releasing the pins one by one, means for causing the point member of each pin to pass through its coil guard and place the coil in operative relation with the guard, and means for crimping the guardabout the coil of the pin. 7

18. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for feeding the pins, means for releasing the pins one by one, means for moving each pin as it is released into operative relation with its guard, a reciprocating head, and a pair of pinching jaws carried by the head and adapted to crimp each guard on the coil of its pin.

19. A machine for assembling safety pins and coil guards therefor comprising a carnamed member.

rier for the guards, means for feeding the pins open, means for moving each pininto operative relation with its guard, a supporting rail for one member of the pin, a reciprocating head, and a finger carried by saidhead to push the other member of the pin into closing relation with the first 20. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for feeding the pins open, means for moving each pin into operative relation with its guard, a suportim rail for one member of the in a reciprocating head, a finger carried by said head to push the other member of the pin into closing relation with the first named member, and a second finger carried by said head to hold the pin and guard in position in the carrier during the closing operation. 21. A machine for assembling safety pins and coil guards therefor comprising a rotary carrier having a series of dies to receivethe coil guards, such carrier and dies being slotted from the edge of the carrier, means for assembling each pin and its guard, means for closing each pin, and means for holding the pin and guard in position in the carrier during the closing operation.

22. A machine for assembling safety pins and coil guards therefor comprising a rotary carrier having a series of dies to receive the coil guards, such carrier and'dies being slotted from the edge of the carrier, means for assembling each pin and its guard, means for closing each pin, a reciprocating head and finger carried by said head to hold the pin and guard in position in the carrier during the closing. operation.

.28. A machine for assembling safety pins and coil guards thereforcomprising a carrier having dies to receive the coil guards and the pins, the dies and carrier being slotted from the edge of the carrier, means for assembling each pin with its guard in the carrier, and means for extracting the assembled pin and guard from the carrier.

24, A machine for assembling safety pins and coil guards therefor comprising a carrier having dies to receive the coil guards.

and the pins, the dies and carrier being slotted from the edge of the carrier, means;

for assembling each pin with its guard in the carrier, a reciprocating head, gripper jaws carried bysaid'head, means to cause the jaws to grip the pin as the head 'ap proaches the carrier, and means to open the jaws to release the pm when the headis withdrawn from the carrier.

25. A machme for assembling safety pins and C011 guards therefor comprising a carrier having dies to receive the coil guards and the pins, the dies and carrier being slotted from the edge of the carrier, means I for assembling each pin with its guard in the carrier, a reciprocating head, friction rier having a series of dies to receive the guards, means for advanclng the carrier,

head withdraws from the carrier step by step, means for causing thepoint member of each pin to pass through itscoil guard and place the coil in operative relation with the guard, means for extracting the pin from the carrier and releasing'it',

and means for ejecting the pin from the machine as it is released by the carrier.

27. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for assembling each pin with its guard in the carrier, a reciprocating head, gripper jaws carried by said head, means for causing the jaws to grip the pin as the head approaches the carrier, means to cause the jaws to release the head when it is withdrawn from the carrier, and means to eject the pin from the machine when it is released from the gripper jaws.

28. A machine for assembling safety pins and coil guards therefor comprising a carrier for the guards, means for assembling Copies of this patent may be obtained for five cents each, by addressing the each pin with its guard in the carrier, a reciprocating head, gripper jaws carried by said head, means for causing the jaws to grip the pin as the head approaches the carrier, means to cause the jaws to release the head when it is withdrawn from the carrier, and a spring-pressed, pivoted ejector plate adjacent to the path of the gripper jaws, yielding to permit the movement of the reciprocating head with the gripper jaws and swinging forward under the influence of its spring to eject the pin as it is released from the giripper jaws.

This specification signed this twelfth day of May, A. D. 1915.

EDWARD CAIRNS.

"Commissioner of Patents,

Washington, D. 0.

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