US519782A - Riveting-machine - Google Patents

Description

(No Model.) 10 Shets-Sl 1eet 1.

J. J. UNBEHEND.

RIVETING MACHINE.

Patented May 15,1894.

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No. 519,782. Patented May 15,1894.

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(No Model.) 10 Sheets-Sheet 3.

J. J. UNBEHEND.

RIVETING MACHINE. No. 519,782. Patented May 15, 1894.;

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J. J. UNBEHEND. RIVETING MACHINE.

No. 519,782. Patented May 15, 1894.

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(No Model.) 10 Sheets-Sheet 5. J. J. UNBEHEND.

RIVETING MACHINE.

N0 Modem 10 Sheets-Sheet 6. J. J. UNBEHEND.

RIVETING MAGHINE. No. 519,782; Patented May 15,1894.

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- RIVETING MACHINE. No. 519,782

Patented May 15,1894.

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Patented May 15,1894.

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(No Model.) 10 Sheets-Sheet 9., J. J. UNBEHEND.

RIVETING MACHINE.

Patented May-15,189'4.

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(No Model.) 10 Sheets-Sheet 10.

J. J. UNBEHEND. RIVBTING MACHINE.

No. 519,782. Patented May 15,1894.

UNITED STATES PATENT OFFIC JACOB J. UNBEHEND, OF WALTHAM, MASSACHUSETTS.

RIVETING-MACHINE.

SPECIFICATION forming part of Letterslatent N 0. 519,782, dated. May 15, 1894. Application filed September 16, 1891. Serial No. 405,915. (No model.)

To aZZ whom it may concern/.-

Be it known that I, JACOB J. UNBEHEND, of VValtham, in the county of Middlesex, in the State of Massachusetts, have invented new and useful Improvements in Riveting- Machines, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to improvements in riveting machines particularly designed for feeding prouged or bifurcated rivets with their prongs similarly arranged, and thus increasing the capacity of the riveting machines and materially adding to the character and style of the work performed thereby; and to this end the invention consists, essentially, in a rivet receiver provided with separable sections having a guide or rib interposed between the sections for registering with the space interposed between the rivet prongs, a rivet hopper for feeding the rivets filled promiscuously thereinto,and aconveyer between the hopper and receiver having a rib also adapted to register-with the space interposed between the rivet prongs, and thereby in connection with the rib in the receiver, feed the rivets from the machine with their prongs similarly arranged.

The invention also consists in the detail construction and arrangement of the parts, all as hereinafter more particularly described and pointed out in the claims.

In describing this invention, reference is bad to the accompanying drawings, forming a part of this specification, in which, like letters indicate corresponding parts in all the views.

Figure 1 is an elevation of my improved invention, the central portion thereof being broken away for the purpose of increasing the scale. Figs. 2, 3, and 4: are respectively enlarged front and opposite side elevations of the detached head of my riveting machine. Fig. 5 is a detail view illustrating the movable stop for the upper end of the rivet receiver. Fig. 6 is an elevation similar to Fig. 3, representing the hopper as removed and the rivet clinching plunger as in its lowest position. Fig. 7 is a top plan view of the parts as shown in Figs. 2, 3, and 4. Fig. 8 is an enlarged vertical sectional view, taken on line -8-8-, Fig. 3, representing the interior construction of the hopper. 9 is an conveyer. Fig. 11 is a similar view to Fig.

10, representing in sections several of the parts'shown in elevation at Fig. 10. Fig. 12 is a similar view to Fig. 10, of somewhat smaller scale, representing the plunger as having forced the lower end of the rivet into contact with the clinching die. Fig. 13 is a detached view of the rivet clinching die, plunger, rivet receiver, and the guide for the plunger, illustrating the plunger as having clinched the rivet upon the die. Fig. 14.- is a vertical sectional view, taken on line -14-14l, Fig. 12, representing the plunger as in its upper position and the rivet, shown in dotted lines, in engagement with the rivet receiver jaws. Fig. 15 is a similar view to Fig. 14, the plunger being shown as having forced the rivet head below the top engaging shoulders of the receiver, and as having slightly separated the rivet receiver sections.

Fig. 16 is a similar view to Fig. 15 representing the rivet as engaged by the lower shoulders of the rivet receiver in its position assumed after the rivet receiver is stopped from further movement and the plunger is in the act of discharging the rivet therefrom. Fig. 17 is a similar view to Fig. 16, the plunger being shown as in its lowest position. Fig. 18 is a transverse horizontal sectional view, taken on line -1818-, Fig. 12. Fig. 19 is an elevation of the receiver supporting bracket and the receiver, shown as partially sec-- tioned, for the purpose of clearly illustrating the lower and upper extremities of the side springs secured thereto. Figs. 20 and 21 are isometric perspectives of the detached lower extremity of the receiver frame or body. Figs. 22 and 23 are isometric perspectives of opposite sides of the rivet supporting springs secured to the receiver frame. Figs. 24 and 25 are respectively face and edge elevations of the detached cutoff for feeding the rivets one by one, and a portion of the supporting bracket for said cutoff. Fig. 26 is a top plan view of the parts as shown at Figs. 24 and 25, and Figs. 2'7 and 28 are respectively isometric Views of the outer guide and lower guide rib.

-A- represents the frame or post, and B the head upon which the respective parts of my machine are supported.

B' is a laterally extending arm on the head 'B adapted to carry any suitable construction of die O, and -b. is a second lateral arm on the head -B mounted above the arm B'- and formed with an upright arm B having a guide-way b' for the plunger -D- having a plunger rod -d movable toward and away from the die -C. V

E represents a lever pivoted at -eto the upper end of the plunger -D-, and EF- a second lever pivoted at e'- to the opposite extremity of the former lever E- and formed with a stop shoulder e adapted to engage said lever E-, and pivotedat -e -to the upper end of the arm B' formed on the upright B E is a counterbalance at the rear extremity of the lever E- for returning the same to its normal position and elevating the plunger -D-; and -F is a link pivoted at -fbeneath the forward extremity of said counterbalance and at f-- to the upper arm g--of a lever G--, which is pivoted ati-gto lugs --a on the post A, and is formed with a foot engaging portion G-. It will thus be noted that the plunger is moved downwardly by the depression of the foot engaging portion G' of the lever -G- and is retracted by the counterbalanceE The rivetreceiver -H- consists of a frame or body h best seen at Figs. 11, 20, and 21, and a pair of springs I-- Figs. 10, 12, 14 to 18, 22 and 23. the body '-his movable in a guide B on the upright -B is formed with a recessh', Fig. 5, adapted to receive the inner end of a bolt -h for governing the movement of the receiver, and is constantly drawn upward by a springh having one end secured to the upper extremity of said frame or body hand the other to the upper extremity of the upright -B The bolt h is mounted in the bearings sh on the head B, is surrounded by a spring h interposed between a shoulder H on one of the bearings h and a shoulder h on the bolt, and is provided with a pin --h normally mounted in a recess h in one of the bearings h and adapted to be withdrawn from said recess and engaged wi-th'the outer face of said hearing when it is desired to withdraw the bolt from engagementwith the upper end of said guide and retain-the bolt in said position. This movement of the bolt h is effected by rocking th same, and,when desired to againengage the bolt with said recess, the shoulder h is registered with the recess h"-, whereupon the spring -h"-- immediately forces the bolt to its normal position with its inner end projecting into the recess --h-. The opposite ends of the springs I are mounted.

The upper extremity of in recesses H formed in the body hof the rivet receiver, as best seen at Figs. 20 and 21, and are secured at one extremity in said position by means of a dowel i and a clamp I- consisting of a bolt z' and a thumb screw -i as best seen at Fig. 19. The springs -I, as clearly shown at Figs. 22 and 23, consist of a strip of spring metal of substantially uniform thickness having lateral offsets i, to which at i z' are secured the blocks or enlarged extremities i, the free end of which extends laterally beyond the spring I- and is in direct alignment with the plunger rod d. Formed in the adjacent surfaces of these lateral ends t' are the upper and lower rivet engaging shoulders i and i and the groove or rivet passage way z-. As seen at Figs. 14: and 15 the upper extremity of the arms or blocks 11 is formed with the cut out t' through which, as presently described, the shank of the rivet passes as its head is imposed upon the top engaging shoulder t' J- isa guide or rib having one extremity jmounted in a slot j'- formed in the lower end of the frame, or body h, and provided with a pin j pivoted in a slot or recess -j also formed in the body or frame -7t+-. The lower end of the guide or rib -J- is mounted between the separable springs -I or sections of the rivet receiver, and is formed with the lateral projection J' extending into the rivet passage way i beneath the top shoulder 2'". As the rivet is fed into position within the rivet receiver it is so arranged that the aperture between its prongs is registered with the projection or rib J'-, whereupon the rivet prongs are imposed on opposite sides of said projection and the rivets, when forced from the receiver, are discharged with their-prongs similarly arranged,since said projection prevents them from turning when within the receiver and partially guides them when being forced through the guideway t' At the rear of the guide -J is a spring J having one end secured at j to the frame or body -h and the other end --j adapted to bear against the guide -J beneath its pivotal point --j As the plunger is forced downward, as previously set forth, it comes in contact with the rivet headand forcesthe 'tzo same beneath the top shoulders z' to the position shown at Fig. 15, thereby slightly separating the springs or sections --I and thereupon the rivet receiver is carried downward with the plunger, since the spring -h which holds said receiver in its upward po- IIO .sition, is insufficiently strong to retain said receiver in its upward position, after the rivet head has slightly separated the rivet sections. The rivet receiver continues its 30 downward movement with the plunger unthe receiver is stopped, and the plunger, which still continues downward, forces the rivet prongs through the grooves or guide until its shank projects slightly beyond the lower face of the rivet receiver, and its head comes in contact with the lower shoulders -z' as seen at Fig. 16. Upon the further movement of the plunger the springs or sections --I-- are sufficiently separated, as shown at Fig. 17, to permit the passage of the rivet head between the shoulders -z' and into any material or article interposed between the lower end of the receiver and the die, whereupon the rivet is securely clinched thereto, as shown at Fig. 13. The plunger is then withdrawn, the spring -h retracts the receiver, and a second rivet is then immediately fed into the receiver as the plunger continues its upward movement as will be presently described. The hopper -K- is vertically arranged and consists of a stationary wall or section kand a revoluble section K' having the outer wall K and the inclined peripheral wall .-K having its edge revolving in close contact with the overlapping ring k-- of the wall or section kand formed at said peripheral edge with outwardly extending cut outs -K The stationary wall or section -k-.- is formed with the recess or guide -10 on the inner face of the rib -k-- adapted to receive the rivets discharged through the outlet openings --K in the movable section K'-, and is secured in position by a screw -lc passed through a shoulder -10 on said wall or section and engaged with the upper extremity of the upright -B This stationary wall or section is also provided with an inclined inlet opening --k and forms a bearing for the shaft -L- for rotating the movable hopper section K. When the rivets have been placed within the hopper, the revolution of its movable section K causes the rivet shanks to feed into the slots or cutouts K with their heads arranged at the outside of the peripheral edge of the section provided with said slots or cut outs and between said edge and the adjacent face of the stationary hopper wall or section is. As the movable section continues its revolution, the rivets either feed by gravity into the recess or guides 10 in the inner face of the rib k of the stationary hopper wall or section, or fall backward within the revoluble section of the hopper. It frequently happens that the recess k is filled with rivets properly fed thereinto, and in that case, the rivets fall backwardly within the stationary hopper section unless the same is so filled as to prevent their ready entrance or unlessthe rivets are unduly cramped or fixed in the slots. To prevent such rivets from being carried around with the movable section of the hopper, I provide a discharge plate M having one end m secured at m to the outer wall of v the inlet k and havingits other end extended outwardly above the peripheral edge of the movable hopper section K for forcibly engaging the head on other projecting portion of the rivet and forcing the same outwardly from the cut out into the inclined inlet opening as the movable hopper section is revolved. It will thus be noted that, as the movable hopper section is revolved, the rivets are constantly fed into the recess k from whence they feed to the conveyer presently described. 7

The movable hopper section K is preferably frictionally secured to its shaft in order to prevent breakage of the parts should a rivet become caught. This frictional securement is efiected by providing the shaft L- with the washer -L'- interposed between the hub lo of the stationary hopper wall -k-- and the hub K on theinterior of the movable clutch section --K'. 0n the outer face of the clutch section K-- is the washer K formed with a recess -K in its inner face and adapted to be clamped against the adjacent face of the clutch section by suitable nuts -K Secured to the inner end of the shaft L- is a ratchet -N, which is engaged by a movable dog npivoted at -n'- to the upper extremity of a lever N'- journaled on the shaft L- with its lower extremity N adapted to operate the rivet cut ofi as presently described.

Pivoted at one extremity to the upper end of the lever -N- and at its other to the lever --E' is a link ---N which thus communicates motion from said lever to the movable hopper section and partially rotatessaid section with every operation of the plunger; this agitation of the hopper section having been found adequate to discharge or feed from the hopper the required number of rivets to maintain a constant supply for the plunger.

0- represents the inner guide of the conveyer -O- for conducting the rivets from the hopper -K- to the rivet receiver H, and, as said receiver is at one side of a perpendicular to the hopper, the guide consists of the vertical upper extremity 0 and the inclined lower extremity -o As best seen at Fig. 26 this inner guide consists of a bar mounted in a recess -O'- in the upright -B and formed with a pair of grooves o and -o the former being adapted to receive the rivet head and the latter the rivet shank, and with a shoulder 0 for engaging the under face of the rivets head and preventing the same from escapement.

With the form of conveyer, as thus far described, rivets provided with prongs areffed with their prongs arranged first one way and then another without any reference to similarity; consequently riveting machines feeding rivets in this manner to the rivet pocket or receiver are not capable of automatically arranging the rivets with their prongs all turned outwardly at the sameangle, which arrangement is particularly desirable in'the securement of seams for shoes and many other classes of work.

To compel the rivets to feed with their prongs similarly arranged I provide the rivet conveyer-O- with an outer section or guide O, which is secured to the upright by right angular shaped brackets P-, and 1s provided on its inner face with the tapered rib O adapted to enter the aperture interposed between, the rivet prongs and arranged with its upper extremity pro ecting into'the recess k for preventing any of the rivets feeding down the conveyer --O unless arranged with their prongs on opposite sides of said rib.

To facilitate the feeding of rivets to the guide which are checked from downward movement by the upwardly extending end of the projection or rib O because-the space interposed between the prongs does not register with said projection, the recess k is formed so narrow that the adjacent wall of the revolving hopper section 'K- bears against and rotates the rivets; this operation being further effected from the fact that the greater part of the recess k is above a line drawn horizontally through the center of said movable hopper section. It will thus be seen that the rivets within the recess 7c are constantly agitated by the revolution of the hopper until-they all feed in the proper manner with their prongs on opposite sides of the rib O-, as best seen at Figs. 1, 2, 3, and 11.

' The lower extremity of the conveyer-O- is, as best seen at Fig. 11, imposed above the top face of the ends iof the rivet receiver springs or sections I for discharging the rivet head directly upon the top shoulder 2'* of said sections I- and to -facili-' tate this passage of the rivet within the rivet receiver the shoulder o is cut away at the lower extremity of the guide and replaced by a yielding shoulder o which holds the rivet in position, but yields sufficiently to allow it to readily feed from the conveyor when in the desired position. It will also be noted that the lower endv'of the outer guide O extends into close approximation with the projection J'--, which virtually forms a lateral continuation thereof and prevents the rivet from turning when being placed within the pocket. -As previously stated the rivets are then forced through the receiver and into the article beneath the same with their prongs similarly arranged.

For the purpose of feedingflthe rivets one by one from the guide to the receiver I provide a cut off S-- consisting of a bar smovable in a transverse guide sin the upright B and provided with posts s carrying projecting lugs or pins s which are movable in transverse grooves s 1n the inner guide O--, are arranged with their adjacent extremities one beneath the other or in very close approximation, as best seen at Fig. 24, and are secured in position by screws s--, as best seen at Fig. 26 The enu of this bar S- projects beyond the upright B and is formed with a pair of shoulders S'- adapted to be engaged by aspring 2fsecured by a screw t to the lower end of a lever -T, the upper end of which is constantly drawn toward the rear of the frame -A by a suitable spring T'. The lower end of the lever N- which, as

previously described, is rocked by every movement of the plunger D-, engages the upper extremity of this lever -T-, and forces the cut off bar forward, whereupon as seen 7 at Fig. 24, a rivet feeds to the lower pin or projection s and as the plunger is retracted, the spring T withdraws the lever --T- to its normal position, whereupon the upper projection is forced into the path of the rivets forpreventing the downward feeding of all except the one previously engaged by the lower projection, which one now passes down to the plunger and enters the receiver as the plunger is retracted upwardly by the action of the counterbalance E The cut off stop lever Itis pivoted by a pin 1'- at one extremity to the upright B and its other end is free and adapted to engage a notch r in the bar S- for stopping the same from operation even though the hopper and plunger are operated, since the spring -T- yields suflioiently to allow such operation.

The operation of my invention will be readily perceived fromthe foregoing description and upon reference to the drawings; it will be particularly noted that the parts are very simple in construction, and readily and economically produced; the rivets constantly fed from the hopper and compelled to assume the same relative position with their prongs similarly arranged, and, when fed within the recess --7t are constantly rotated until the space interposed between their prongs is aligned with the projection O whereupon they feed downwardly to the cut 0E, which is then operated to feed the rivetsone by one to the receiver; that this receiver is also provided with a guide for preventing turning of the rivet when being fed into and through the receiver, and that the opposite sections of the receiver readily separate to allow the plunger to force the 'rivet therefrom and clinch the same in operative position.

It will be understood that the detail construction and arrangement of the parts of my invention may be somewhat varied from those shown and described without departing from the spirit thereof, hence I do not specifically limit myself to such detail construction and arrangement.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is=

1. In a riveting machine for pronged rivets,

the combination of a rivet receiver shell consisting of opposite separable sections pro= vided with a guideway in their adjacent faces formed with a contracted lower endandhaving shoulders as i at its upper end, and a movable guide having a lateral offset projectng into said guideway beneath said shoulders, substantially as and for the purpose described.

2. In a riveting machine for pronged rivets, the combination of a rivet receiver shell consistlng of opposite separable spring sections provided with a guideway in their adjacent faces formed with a contracted lower end and having shoulders as i at its upper end, and a pivoted guide having a lateral ofiset prov j ecting into said guideway beneath said shoulders, substantiall" as and for the ur o. specified. p p s6 3. In a riveting machine for pronged rivets, the combination of a rivet receiver shell cons sting of opposite separable sections provided with a guideway in their adjacent faces formed with a contracted lower end and havlng shoulders as 2' at its upper end, a movable guide pivoted at its upper end and having a lateral offset at its lower end, projecting into said guideway beneath said shoulders, and a spring having one end secured to the receiver and the other end bearing against the upper end of said movable guide, substantially as and for the purpose described.

4. In a riveting machine for pronged rivets, the combination of a receiver'shell consisting of opposite separable sections provided with a gu1deway in their adjacent faces formed with a contracted lower end and having shoulders as 2" at its upper end and a recess in one of its walls amovable guide removably mounted in said recesses and having a lateral ofiset projecting into said guideway beneath said shoulders and a spring for holding said lateral offset in its operative position, substantially as and for the purpose specified.

5. In a riveting machine for pronged rivets, the combination of a frame, apair of springs secured at one extremity to said frame and formed with enlarged ends having the groove 2 aud the shoulders -4 -i and a yielding guide having one extremity inclined and mounted between said enlarged ends for registering with the space interposed between the rivet prongs, substantially as specified.

6. In a riveting machine for pronged rivets, the combination of a frame, a pair of springs secured at one extremity to said frame and formed with lateral projecting arms having the groove t'*-- and shoulders -t' -t' one above the other, a guide pivoted at one extremity to said frame and formed at the other with a lateral offset disposed between the lateral ends of said springs and formed with an inclined upper extremity, and a spring bearing against said guide, substantially as set forth.

7. In a riveting machine, the combination with a die and a plunger movable toward the same for clinching the rivets; of a rivet receiver movable in the same direction as the plunger and formed at one extremity with a toward the die for clinching the rivets, a rivet receiver movable in the same direction as the plunger and formed with a recess at its upper extremity, a guide for said upper extremity formed with an opening, a rocking rod adapted to pass through the opening in said guide and register with the recess in the upper extremity of the rivet receiver, aspring on said rod, and a shoulder on said rod adapted to be engaged with the frame and prevent the operation of the rod,substantially as and for the purpose described.

9. In a riveting machine for pronged rivets, the combination of a guide provided with a shoulder for engaging the inner facesof the rivet heads and formed with a groove for receiving the rivet heads and with a groove of less width than the former one alignedtherewith and extending lengthwise thereof for receiving the rivet shanks, and a guide having a projection or rib aligned with said grooves and-extending lengthwise thereof for registering with the space between the rivet prongs, substantially as and for the purpose described.

10. In a riveting machine for pronged rivets, the combination of a guide provided with a shoulder for engaging the inner face of the rivet heads and formed with a groove for receiving the rivet head and with a groove of less width than the former one aligned therei with and extending lengthwise thereof for receiving the rivet shanks, a guide having a, projection or rib aligned with said grooves and extending lengthwise thereof for registering with the space between the rivet prongs, and a cutoif movable transversely across said grooves and projection or rib, substantially as and for the purpose specified.

11. In a riveting machine for pronged rivets, the combination of aguide provided with a shoulder for engaging the inner face of the rivet heads formed with a groove for receivingthe rivet heads and with a groove of less width than the former one aligned therewith and extending lengthwise thereof for receiving the rivet shanks, a guide havinga projection or rib aligned with said grooves and extending lengthwise thereof for registering with the space between the rivet prongs, a bar movable transversely across said guide, and provided with projecting posts arranged on opposite sides of said guide, and lugs adj ustably mounted in said posts for engaging the rivets and feeding the same one by one, substantially as and for the purpose described, v

12. In a riveting machine for pronged rivets, the combination of a guide provided with a shoulder for engaging the inner faces of the with and extending lengthwise thereof for re ceiving the rivet shanks, a guide having a proj cation or rib aligned with said grooves and extendinglengthwisethereoffor registering with the space between the rivet prongs, a rivet receiver shell consisting of opposite separable sections provided with a guideway in their adjacent faces formed withIa contracted lower end and having shoulders at its upper end, and a movable guide having a lateral offset projecting into said guideway beneath said shoulders, substantially as and for the purpose set forth. 1

13. In a riveting machine for pronged rivets, the, combination of a guide provided with a shoulder for engaging the inner faces of the rivet heads and formed with a groove for receiving the rivet heads and with a groove of less width than the former one aligned therewith and extending lengthwise thereof for receiving the rivet shanks, a guide having a projection or rib aligned with said grooves and extending lengthwise thereof for regis- Qtering' with the space between the rivet prongs, a rivet receiver frame, a pair of springs secured at one extremity to said frame and formed with enlarged ends having a groove, as 7?, and shoulders, as i i and a yielding guide having one extremity inclined and mounted between said enlarged ends and aligned with said projection or rib for registering with the space interposed between the rivet prongs, substantially as and for the purpose specified.

14. In a riveting machine for pronged rivets, the combination of a guide provided with a shoulder for engaging the inner faces of the rivet heads and formed with a groove for receiving the rivet heads and with a' groove of less Width than the former one aligned therewith and extending lengthwise thereof for receiving the rivet shanks, a yielding shoulder at the lower extremity of said guide for preventing undue escapement of the rivets, a second guide having a projection or rib aligned with said grooves and extending lengthwise thereof for registering with the space between the rivet prongs, substantially as and for the purpose described.

15. ha riveting machine for pronged rivets, the combination with a hopper and a rivet receiver arranged at one side of a perpendicular to the hopper and a guide interposed between said hopper and rivet receiver, and having the substantially vertical portion 0' and the inclined lower portion 0 said guide being provided with a shoulder for engaging the inner faces of the rivet heads and being formed with a groove for receiving the rivet heads andwith a groove of less width than the former one aligned therewith and extend-' ing lengthwise thereof for receiving the rivet shanks, and a guide having'a projection or rib aligned with said grooves and extending lengthwise thereof for registering with .a space between the rivet prongs substantially as and for the purpose described.

16. In a riveting machine for pronged rivets, the combination of a hopper having a stationary wall or section provided with a guide or recessin its wall for receiving the rivets, and a revoluble agitating section having its outer face movable at one side of said guide or recess for engaging and rolling the rivets in the guide or recess; with a guide leading from the guide or recess of the stationary wall or section for conducting the rivets therefrom, and a projection or rib aligned with the latter guide and extending lengthwise thereof for registering with the space between the rivet prongs, one extremity of said projection or rib being extended to the guide or recess in the stationary wall or section of the hopper, for preventing the passage therefrom of the rivets having thespaces between their prongs out of alignment with said projection or rib, substantially asand for the purpose specified.

17. In a riveting machine for pronged rivets, the combination of a hopper having astationary wall or section'provided with a guide or recess in its inner wall for receiving the rivets, and a revoluble agitating section having its outer face movable at one side of said guideor recess for engaging and rolling the rivets in the guide or recess; with a guide leading from the guide or recess of the stationary wall or section for conducting the rivets therefrom, and'a projection or rib'aligned with the latter guide and extending lengthwise thereof for registering with the space between the rivet prongs, one extremity of said projection or rib being extended to the guide or recess in the stationary wall or section of the hopper for preventing the passage therefrom of the rivets having the spacesbetween their prongs out of alignment with said projection or rib, a rivet receiver at the lower end of the latterguide provided withaguideway for the rivets, and a movable guide aligned with said projection or rib and projecting into said guideway, substantially as and for the purpose described.

18. In a riveting machine for pronged rivets, the combination of a hopper having a stationary wall or section provided with a guide or recess in its inner wall for receiving. the

rivets and a'revoluble agitating section formed with an internal chamber open at one side and with peripheral slots opening from said chamber and having its outer face movable at one side of said guide or recess for engaging and rolling the rivets in the guide or recess, a rivet receiver provided with a guideway for the rivets and a guide interposed between the hopper and a rivet receiver for conducting the rivets from the guide or'recess of said stationary wall or section into the guideway of the rivetreceiver, substantially as and for the purpose specified.

l9. In a riveting machine for pronged rivets, the combination of a hopper having astationary wall or section provided with a guide or recess in its inner wall for receiving the rivets, a revolnble agitating section formed with an internal chamber open at one side and with peripheral slots opening from said chamber, and having its outer face movable at one side of said guide or recess for engaging and rolling the rivets in the guide or recess, a discharge plate having one end fixedly secured and having its other end projecting transversely across the peripheral face of the revoluble agitating section in proximity to said peripheral face for discharging the rivets from the peripheral cutouts of said section, a rivet receiver provided with a guideway for the rivets and a guide interposed between the hopper and the rivet receiver for conducting the rivets from the guide or recess of said stationary wallor section into the guideway of the rivet receiver, substantially as and for the purpose described.

20. In a riveting machine, the combination of the shaft -L, a hopper shell frictionally secured to said shaft and formed with outwardly extending slots at its peripheral edge, a rivet receiver, a conveyer between said receiver and hopper shell having a projection for registering with the space interposed between the rivet prongs, a out 01f interposed between the hopper and receiver for feeding the rivets one by one, and a connection between the shaft -L and said out off for communicating motion from one to the other, substantially as and for the purpose described.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, at Waltham, in the'county of Middlesex, in the State of Massachusetts, this 15th day of July, 1891.

JACOB J. UN BEHEND. Witnesses:

ENOS T. LUCE, JOHN P. NOBLE.

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