US1823894A - Fastener-setting machine - Google Patents

Description

p 931- s L. aobKlN 1,823,894

FASTENER SETTING MACHINE Filed Dec. 24, 1928 2 Sheets-Sheet 1 i J i //v vex/70A Sept. 22, 1931. L, GOQKIN 1,823,894

FASTENER SETTING MACHINE Filed Dec. 24, 1928 2 Sheets-Sheet 2 Patented Sept. 22, 1931 marten srATE-ls P TENT GFFiCE.

SYLVESTER L. eooKin, on QUINCY, MAssAcnusnTr-s, Assrenon T UNITED SHOE MA:

CHINERY CORPORATION, OF Parr-neon, new JERSEY, A conrona'rron OF NEW.

JERSEY rasrnnnn-sn'rrine Mecnmn Application filed December 24, 1528. Serial No. 328,208.

This invention relates to fastener-setting machines and is herein illustrated as embodied in a machine for setting eyelets by.

upsetting and clenching their barrels.

In the manufacture of certain articles '1' which eyelets or grommets may be tightly clenched in such articles. For example, in the manufacture of radio-receiving apparatus some manufacturers use fasteners having tubular barrels to secure electrical contact members and othermetallic conductors to sheets, plates or strips of comparatively hard, rigid or non-compressible insulating material such as bal'elite and vulcanized rubber.

This class of work has heretofore been done with eyeleting-machines in which two fastener-engaging tools have been caused to cooperate with pressure alone to upset and clench one end of the barrel of a fastener provided with. a flange at its other end, but the results have not been uniformly satisfactory. A serious difficulty is that if the materials through which the fasteners extend are comparatively hard and non-compressible the clenched ends of the fasteners spring away from the articles of work when the clenching pressure of the tools is removed, so that the parts connected by the fasteners do not remain tight relatively one to another. If a very heavy clenching pressure applied in an attempt to make the connec-' tion permanently tight it often results in breaking or cracking the insulating material through which the barrel of the fastener extends.

In view of the conditions above setforth an object of the present invention is to provide an improved machine by which the barrels of annular fasteners, such as eyelets or grommets, may be clenchedtightly against comparatively hard, rigid or noncompressi bl materials without applying pressure so great as to break, crack or otherwise mutilate the articles of work or the fasteners clenched therein. 1

c To this end a feature of the invention consists in a fastener-setting machine comprising two initially separated fastener-setting tools arranged to operate against opposite ends of the barrel of such a fastener, mechanism for relatively moving the tools one toward and from the other, and mechanism for rotating one of said tools continuously throughout the periods of upsetting and clenching pressure to supplement such pressure with a spinning action. It has been found in practice that when the barrel of a fastener is subjected to aspinning action during the period of the final or maximum clenching pressure, the clenched end of the barrel will remain tightly set instead of ting tools are separated' It has also been found that if the operating pressure is supplemented by a spinning action a moderate degree of pressure is sufiicie'nt to insure tight clenching. i

In accordance with a feature of the invention, the illustrated machine is provided I with a fastener-setting tool having a series tool is provided with a central projection or pilot formed and arranged to project through a fastener-receiving hole previously formed in the fastener-receiving material, and the ribs above referred to merge into the'base of this pilot and extend outwardly therefrom to flare one end of the fastener barrel with a spinning action'and to'continue this action until the flared end is clenched against the fastener-receiving material.

"In the illustrated machine the spinning tool is mounted in a stationary horn detachably fixed to the frame of the machine so that horns provided with tools of various shapes and'sizes'may be readily substituted, one for another. Moreover, the illustrated horn is provided with transmission mechanism by which rotary motion may be communicated to the spinning tool. This transmission mechanism is enclosed in the horn V through a shank portion of the horn and into an interior space in the frame of the machine so that when this shaft is connected to a driving train in the interior space the operator is protected from injury by the mechanism that furnishes rotation to the Fig. 3 is a vertical section showing the setting tools on a larger scale;

Fig. 4 is a horizontal section through the horn and the spinning tool and shows the transmission mechanism mounted in the horn Fig. 5 is a vertical section on an enlarged scale including the lower portion of one of the fastener-setting tools and a fastener carried thereby;

Fig. 6 is a bottom plan view of the tool illustrated in Fig. 5;

Fig. 7 is a top plan view of a preferred form of spinning tool formed in accordance with this invention;

Fig. 8 is a sectional development of the ribs and grooves embodied in the tool illustrated in Fig. 7; and

Fig. 9 is a sectional view of an article of manufacture comprising a plate of non-compr%sible insulating material and a metallic conductor fastened together by an eyelet clenched by the use of the machine illustrated in Fig. 1.

The general organization of the illustrated machine is similar in many respects to that illustrated and described in United States Letters Patent No. 1,369,021 granted February 22, 1921 on application of P. R. Glass. The frame 10 of the machine is hollow and is formed with an annular open base 12 mounted on the shaft 16 to be controlled by a rod 26 so that the pulley 24 may be coupled to the shaft by depressing the con trol rod and uncoupled when the control rod is raised by a spring 28. The pulley 24 is driven by a belt 30 that runs around a relatively small and continuously driven pulley 32v affixed to a countershaft 34 arranged below the frame 10. The pulleys 24 and 32 are preferably proportional to cause relatively slow rotation of the shaft 16.

The machine is provided with fastenerinserting mechanism comprising a vertical plunger 36 (Fig. 3), a fastener-inserting tool 38 carried thereby, a lever 40 for reciprocating the plunger, a link 42 for operating the lever 40 and a wrist pin 44 for operating the link to move the tool 38 to and from a fixed limit of operating movement. The wrist pinis carried by and projects from the cam member 18. The lever 40 is connected to the arm 14 by a fulcrum pin 46. Operating connection between the lever 40 and the plunger 36 is provided by a pair of links 48. The plunger 36 is arranged to slide in a bearing 50 formed in the arm 14. The clutch for coupling .and uncoupling the pulley 24 and the shaft 16 may advantageously be of the type illustrated and described in United States Letters Patent No. 1,351,138 granted August 31, 1920 on application of R. B. Smith, the organization preferably being such that, as in the construction set forth in the Letters Patent last referred to, rotation of the shaft is arrested when the wrist pin 44 is at bottom center, as shown in Fig. 1, so that the fastenerinserting tool 38 will be'raised to its highest position when the machine is at rest.

The raceway 20 is arranged between a pair of ears 52 formed on the arm 14 and is connected to the ears by a horizontal fulcrum pin 54. Mechanism is provided for oscillating the raceway about the pin 54 so that the lower end of the raceway will execute a substantially horizontal to-and-fro motion for the purpose of presenting fasteners to the inserting tool 38. The mechanism for this purpose comprises the aforesaid grooved cam 18, a lever 56 (Fig. 1), a cam roll 58 mounted on the lever, a horizontal rockshaft 60 to which the lever 56 is afiixed, an arm 62 (Fig. 2) also aflixed to the rockshaft, and a link 64 connecting the arm 62 and the raceway. The connection between the link and the raceway is formed by a pivot pin 66. This mechanism is so organized that when the inserting tool 38 is raised to its highest position, a fastener at the delivery end of the raceway will stand in register with the tool, but as the tool descends the raceway will be retracted from its path.

The delivery end of the raceway is provided with a spring-pressed detent 68 by which the leading fastener in the raceway is arrested so that it will register with the tool 38. In" accordance with common practies the tool 38 is provided with a springpressed spindle 70 that normally projects therefrom to detach a fastener from the raceway and to carry the detached fastener to an article of work through which the barrel of the fastener is to be inserted. A compression spring 72 (Fig. 3) for normally projecting the spindle 70 is contained in a the brush is rotated, and a belt 7 8 by which shaft.

rotation is transmitted from the pulley/ 22 to the pulley 76. The belt 78 runs over sheaves 80.

The fastener-inserting tool 38 cooperates with arotary spinning and clenching tool 82 adjustably secured in a holder 84 (Fig. This holder is cylindric but is provided with helical gear teeth 86 and witha narrow flange 88 at its lower end. A horn 90 is provided with a cylindric vertical socket 92 to provide a bearing for the holder 84:.

The horn is detachably affixed-to the frame 10 and for this purpose the frame is provided with a cylindrie socket 92 open at its front'end toreceive a cylinclric shank 94 formed on the horn, and open at its rear end toprovide communication with the interior space in the frame 10. A setscrew 96 screwed into the frame 10 is arranged to engage the shank 94 to fasten the horn rigidly to the frame. A dowel 98 (Fig. 1) projects into the frame 10 and into a portion of the horn to prevent the horn from turning about the axis of the shank 94 and to maintain the axis of the spinning tool 82 parallel to that of the fastcner-in erting tool 38. A face 100 formed on the horn is arranged to abut againsta front face of the frame 10 to registerthe spinning tool relatively to the fastenerinserting tool 38. A broken line Ain Fig. 1 indicates the axis of the cylindric shank 94, and it may be observed that this line intersects the axis of the tool 82.

The horn 90 is also provided with trans mission mechanism by which rotation may be imparted to the tool holder 8 1. This mechanism comprises a shaft 102 one portion of which is journaled in the shank 9 1 and another portion of which is journaled in a bushing 104 inserted into the horn. A helical gear 106 formed on or aflixed to the forward end of "this shaft meshes with the helical teeth 86 to drive the tool holder 84. After the shank 94 of the horn has been inserted into its socket 92 in the frame 10 a pulley 108, inserted through the base 12 into the interior space of the frame 10, is affixed to the rear end of the shaft-1 02, the pulley being provided with a set-screw 110 for this purpose. A belt 112 (Fig. 1) runs over the pulley 108 and around a pulley 114 on the countershaft 34, the spinning tool 82 being therebysrota-ted continuously so long as driving power is applied to the counter The belts and pulleys, as shown,

cause the spinning tool to rotate about'eight I turns while the shaft, 16 is turning once.

The horn 90 is designed to provide for inserting the transmission shaft 102 from front to rear,. and when these ,partshave been assembled they are maintained in '00- operative relation by a screw plug 116 screwed into the forward end of a bushing 118 pressed tightly into the horn and forming a chamber for the gear 106. The plug 116 also excludes dirt from the gear chamber and prevents lubricating oil fromrunning out. Moreover, when the shaft 102 is driven in the direction indicated by an arrow in Fig; 4 the P s 16 sustains the end thrust due to the reaction of the helical gear teeth.

The tool holder 84 is inserted upwardly into the socket 92 before the shaft 102 and gear 106 are inserted into the horn. flange 88- at the lower end of theholder 8&- engages thehorn to prevent the holder from being inserted too far, and the holder is confined in its socket by a, screw plug 120 screwed upwardlyinto the bottom of the horn. This plug prevents lubricating oil from running out of the socket 92. A hard ened steel shim 122 of suitable thickness is interposed between the bottom of the holder 841 and the plug 120 to sustain the down- 1 5 ward pressure of the holder and to eliminate axial play thereof. The direction of rotation of the gear 106 maintains a constant The holder 84 is bored and tapped to provide a concentric socket to receive the shank 124 of the spinning tool 82, the lower porof the articles of work to which fasteners are to be applied. The upper portion of the tool 82 is also provided with a left-hand screw thread 128 to cooperate witha retaining nut 130. The bottom of this nut is seated on the upper end of the holder 84. The

direction of rotation of the holder 84 tends to tighten the spinning tool and the nut 130, but if it werepreferred to drive the spinning tool in the opposite direction the abovementioned tightening effect would be obtained by substituting right-hand threads for the left- hand screw threads 126 and 128.

To insuretight clenching of fastener barrels against non-compressible articles of work without using a heavy pressure the spinning tool, 82 illustratedin Figs. 2, 7 and 8, is provided with a circular series of metal-, working formations represented as ribs 1.32 separated by depressions, the ribs 132 being nearly but preferably not quite radial with The 's downward pressure against the gear teeth "100 with a central tapering projection or pilot 136 into which the ribs 132 merge.

The slight skewing of the ribs from strictly radial relation to their axis of rotation produces a component of outward deflection of the metal brought to bear aga-inst them.

This component of deflection facilitates the upsetting by Working the metal of the barrel outwardly with a flaring effect. In practice, the quantity of metal worked outwardly is suflicient to avoid splitting the metal. I

Fig. 9 illustrates a typical example of an eyelet that has been'inserted through two hard and non-compressible elements and clenched by a spinning tool formed in accordance with this invention. The numeral 138 indicates a plate of bakelite and numeral 139 indicates a brass or copper contact plate. The eyelet comprises an unscored tubular barrel 140 and a flange 142 of ductile metal such as brass, one end 144 of the barrel being turned outwardly and backwardly toward the flange and clenched tightly against the bottom surfaceof the element 138 without being flattened or split.

To insure the most satisfactory spinning action by the tool 82 it is necessary to prevent rotation of the eyelet. For this rea son the tool 38 is provided with formations designed to grip the flanged end of the eyelet so that the latter will not be turned by the rotational movement of the spinning tool. Referring to Figs. 5 and 6, the lower face ofthe tool 38 is provided with an annular depression 146 to receive the flange 142 of the eyelet. The inner boundary of this depression is formed by an annular protruding lip or flange 148 having a tapering formation that enters slightly into the eyelet atthe junction of the barrel 140 and the flange 142. 'Thus, when pressure is applied to the I eyelet by downward thrust of the tool 38 thefiange 148 becomes wedged tightly in the upper end of the eyelet and exercises a considerable gripping action. The holding effect of the flange 148 may be supplemented by grooves scored in the depression 146. As shown in Fig. 6 radial grooves '150 are scored not only in the depression 146 but also in the flange 148and in the protruding margin 152 of the tool. The described machine operates in the following manner to insert an eyelet and to to maintain them in register with each other .and with the eyelet centered by the spindle 70. When the machine is connected to a source of power such as the continuously driven countershaft 34 the driving pulley 34 and the spinning tool 82 will rotate continuously not only while the operating shaft 16 is being driven but also while it is unclutched and stationary.

The initial position of the wrist pin 44 is illustrated in Fig. 1 and the initial positions of the inserting tool 38 and the raceway 20 are illustrated in Fig. 2. Thus, when the operator depresses the clutch-controlling rod 26 to start the machine the tool 38 is fully raised and the raceway. 20 supports a fastener in registerwith the spindle 70. During the first stages of downward movement of the plunger 36 the spindle 70 is inserted into the barrel 140 of the fastener then lying against the spring-pressed detent 68 at the delivery end of the raceway. During this inserting movement of the spindle 70.

the raceway 20 is retracted from the path of the tool 38, the fastener being thereby detached from the raceway. The detached fastener clings to the spindle 7 O, the lower portion of the spindle being slightly tapered to insure a snug fit in the barrel 140 as shown in Fig. 5.

Further downward movement of the plunger 36 carries the tip of the spindle 70 into engagement with the tip of the pilot portion 136 by which the spindle is arrested. The downward movement of the plunger 36 continues, thereby causing the tool 38 to bear upon the flange 142 of the fastener and to depress the barrel 140 of the fastener through the holes in the elements 138 and 139 of the work. As the lower end of the barrel 140 passes through these elements it is slightly expanded by the tapering pilot 136 and thereby maintained in concentric relation to the axis of the spinning tool. As shown in Figs. 2 and 3 the base of the pilot portion 136 curves outwardly, this formation causing a gradual flaring of the barrel. At this stage thespinning effect of the ribs 132'begins, and the downward movement of the tool 138 is relatively slow and undergoing deceleration be cause the wrist pin 44 is approaching a dead center. Thus, the spinning action increases gradually in relation to the speed with which the flaring and upsetting of the barrel progresses. During the remainder of the downward movement of the inserting tool 38 the lower end of the barrel 149 is subjected to the spinning action of the ribs 132 which turn it back while working the metal away from the center with the result that a crowned clenched formation 1% (Fig. 9) is imparted to the barrel without causing the barrel to split at any point.- The ribs 132 so greatly facilitate the upsetting and clenching that no great pressure is required to effect a tight clench. Moreover, since the spinning action continues throughoutthe period of maximum clenching pressure the spinning tool imparts a permanent set to the clenched portion 144L- so that'the latter will not spring back when the clenching pressure is relieved. This result is particularly advantageous in certain kinds of work, for example, clenching eyelets in articles made of bakelite, vulcanized rubber and other rigid materials used extensively in radio construction since, inwork of this kind, it is necessary not only to make all mechanical connections quite tight but also to avoidv cracking and chipping the brittle materials to which electrical conductors and fasteners are applied.

In practice the operatorwill release the control rod 26 without delay after starting the operation of the machine, so that the wrist pin 14: will execute only one cycle before stopping. During the latter'stages of the upward movement of the inserting tool 38 the delivery end of'the raceway 20 will return to its initial position'to present an-..

other fastener in register with the'spindle 70'.

It is to be observed that the mechanism for driving the spinning tool 82 is arranged so that it does not encumber-in any degree thespace required for manipulation of the articles of work, and that this mechanismis fully enclosed so that neither the articles of work nor; the operators hands or'clothing can be caught thereby. With theexception different type or shape of horninstead of the horn the exchange may be readily made by detaching the pulley 108 and releasing the horn, the set- screws 96 and 110 being the only parts-that requirethefuse of a tool to accomplish the change.

Having thus described my invention,"

what I claim as new anddesireto secure by Letters Patent of the United States is:

l. A fastener-setting" machine comprising two initially separated fastener setting tools formed and arranged to project into and preventing operate against opposite ends ofthe barrel I of a tubular fastener, automatic mechanism for relatively moving said tools to apply upsetting and clenching pressure against the ends of the barrel of a fastener, and mecha nism for rotating one of saidtools contmuously throughout a period of upsetting and a1id clencl1ing pressure, and mechanism for rotating one of said tools contmu'ously' throughout-a period of upsetting and clenching pressure to supplement such pressure with aspinning action, the otherone of said tools being provided with means formed to fit tightly in the barrel of a fastener for said period. v v

3; A fastener-setting machine comprising an axially movable tool and a rotary tool initially separated and arranged to operate;

against opposite ends of the barrelof a tubu: lar fastener, automatic mechanism arranged to advance said axially: movable tool to a ,fiXed limit'of operative movement to apply the periodof maximum pressure applied by the. other tool, the rotary tool having a fastener-centering formation and another formation to upset and clench the barrel of the fastener. a f

4. A fastener-setting machine comprising a rotary setting'tool and a non-rotary set ting tool "coaxially related and arranged to operate against opposite ends of the barrel of a tubular fastener, means arranged to present a fastener to one of said tools, automatic mecham n arranged to operate said rotation of the fastener during lit non-rotary tool to thrust a fastener axially;

into an article of work and against the other one of said tools with upsetting and clenching pressure, and mechanism arranged to rotate said rotary tool throughout. the upsetting and, clenching period, said 7 rotary tool having a protruding metal-working element formedto set the clenched portion of the barrel with a spinning action, and the non-rotary tool having a formation to grip the fastener and prevent rotation thereof.

5. A fastenensetting machine comprising a .non+rotary setting tool vand a rotary setting tool arranged to operate against oppo-- site ends of the barrel of a tubular fastener,

mechanism arra'nged to operate one of said tools to thrust a fastener axially againstthe other one of said tools with upsetting and clenching pressure, and mechanism arranged to rotate said rotary tool during the upsetting and clenching period, said non-rotary tool having a formation to prevent rotation of the fastener and said rotary tool having 1 a skewed metal-working formation arranged to upset and clench the barrel of the fastener with a spinning action.

6. A-fastener-setting machine comprising a non-rotary setting tool and a rotary setting tool arranged to operate against oppo site ends of the barrel of a tubular fastener, mechanism arranged to operate one of said tools to thrust a fastenerv axially against the other one of said tools with upsetting pressure, and mechanism arranged to rotate said rotary tool during the upsetting and clench-i ing period, said non-rotary tool having a scored tapering formation of a size to enter and grip one end of the barrel and thereby prevent rotation of the fastener, and said rotary tool having a metal-working formation to upset and clench the barrel with a spinning action. I

7. A fastener-setting machine comprising a non-rotary setting tool and a rotary setting tool arrangedto operate against opposite ends of the barrel of a tubular fastener,

mechanism arranged 'to reciprocate one of said tools axially to apply upsetting pressure to the fastener, and mechanism arran'gedto rotate said rotary tool, said nonrotary tool having a scored fastener-engaging surface to prevent rotation of the fastener, and said rotary tool having a formation to upset fand clench the barrel-witha spinning action. a i

8. A fastener-setting machine comprising a non-rotary setting tool and a rotary settm tool formed and arran ed to pro ect into and operate against opposite ends of the barrel of a tubular fastener, mechanism arranged to'reciprocate one of said tools axially to apply upsetting pressure to the 3 the barrel of a tubular fastener, mechanism arranged'to reciprocate one of said tools axially to apply upsetting pressure to the fastener, and mechanism arranged to rotate said rotary tool, said non-rotary tool having a formation to grip the fastener and there r by prevent rotation thereof, and said rotarv tool having eone'vor more non-radial metalworking ribs formed to upset and clenchthe barrelwith a spinning action.

10. A fastener-setting machine comprising a non-rotary setting tool anda rotary setting tool arranged to operate against opposite ends of the barrel of a tubularfastener, mechanism arranged to reciprocate one of said tools axially to apply upsetting pres: sure to the fastener, and mechanism arranged to rotate said rotary. tool,- said nonrotary tool having a formation to grip the fastener and thereby prevent rotation thereof, and said rotary tool having one or more non-radial metal-worxing elements formed to upset and clench the barrel with a spin-' ning action and with a component of outward radial deflection. j

11. A fastener-settin machine comprising a non-rotary setting tool and a rotary setting tool arranged to operate against op-: posite ends of the barrel of a tubuh r fastener, mechanism arranged to reciprocate one of said tools axially to apply upsettting pressure to the fastener, and mechanism ar ranged to rotate said rotary tool, said non rotary tool having a formation to grip the fastener and thereby prevent rotation thereof, and said rotary tool having a projecting fastener-engaging pilot and a series of metal-working ribs'merging into said pilot nd formed to upset and clench the barrel with a spinning action. j

12. A fastener-setting machine comprisinga non-rotary setting tool and a rotary setting tool arranged to operate against opposite ends of the barrel of a tubular fastener, mechanism arranged toreciprocate one of said tools axially to apply upsetting pressure to the fastener, and mechanism arranged to rotate said rotary tool, said non-rotary tool having a formation to grip the fastener and thereby prevent: rotation thereof, and said: rotary tool havinga fastener-engaglng pilot and one or more metal-working ribs skewed from radial relation but-merging into said pilot and formed to upset and clench the barrel with a spinning action.

13. A fastener-setting machine comprising anon-rotary setting tool and a rotary setting tool arranged to operate against opposite ends of the barrel of a tubular fastener, mechanism arranged .to reciprocate one of said tools axially to apply upsetting pressure to the fastener, and mechanism arranged to rotate said rotary tool, said non-rotary tool having a formation to grip the fastener, and thereby prevent rotation thereof, and said rotary tool having a seriesof metalworking Iribs of ratchet-shaped profile formed and arranged to upset and clench the barrel with a spinning action.

l-fl. A fastener-inserting machine comprising an axially movable fastener-inserting tool and a rotarytool formedand arranged to operate against opposite'ends of the barrel of a tubular fastener, means arranged to V supply fasteners to said axially movable tool,

mechanism arranged tooperate said axially life lilt

15. A fastener-inserting machine c0mpri s-' ing an axially movable fastener-inserting tool and a rotary tool formed and arranged to operate against opposite ends of the barrel of a tubular fastener, means arranged tosupply fasteners to said axially movable tool, mechanism arranged to operate said axially movable tool to transfer a fastener from said supply means and press the fastener against said rotary tool, and mechanism arranged to rotate said rotary tool, said axially movable toolhaving an interrupted fastener-engaging surface to prevent rotation of the fastener and said rotary tool having a metal-working formation to upset and clench the barrel of the fastener with a spinning action.

16. A fastener-inserting machine compris- 'ing an axially movable fastener-inserting tool and a rotary tool arranged to operate against opposite ends of the barrel of a tu-' bular fastener, means arranged to supply fasteners to said axially movable tool, mech anism arranged to operate said axially movable tool to transfer a fastener from said supplying means and press the fastener against said rotary tool, andmechanism arranged to rotate said rotary tool, said rotary tool having one or more metal-working ribs formed and arranged to upset and clench the barrel with a spinning action and also having a central pilot to maintain the barrel of the fastener in concentric relation to the axis of the spinning tool.

17. A fastener-setting machine comprising clutch-controlled fastener-setting mechanism including an axially movable setting tool formed and arranged to operate against one end of the barrel of a tubular fastener,-

a rotary tool formed and arranged to operate against the opposite end of the barrel, automatic means for relatively -moving said tools to apply upsetting and clenching pressure to the fastener, and mechanism for rotating said rotary tool continuously, said rotary tool having a central work-engaging pilot and a metal-working formation to upset and clench the barrel with a spinning action.

18. A fastener-inserting machine comprising a frame, an axially movable tool and a rotary tool arranged to operate against opposite ends of a fastener, mechanism ar-' ranged to operate said axially movable tool to applyupsetting and clenching pressure to a a fastener, a horn in which said rotary tool is mounted, said horn having a shank por-v tion and said frame having a socket toreceive said portion and thereby support the horn, and transmission mechanism enclosed in said horn to communicate rotation to said rotary tool, an element of said transmission mechanism extending through said shank portion of the horn and projecting from the inner end thereof to be operatively connected with a source of rotation.

19. A fastener-setting machine comprising a hollow frame provided with a socket extending through a wall thereof, a horn provided with a shank formed to be inserted into said socket a rotar s innin 7 D tool mounted in said horn, transmission mechanism enclosed 1n said'horn to comfmunicate rotary motion to said tool, said transmission mechanism including a shaft extending through and pro ect1ng from the inner end of said shank portion, drivingof ribs having smoothblunt operating surfaces formed to upset and clench the fastener,said ribs being skewed from radial positions to work the metal of the fastener outwardly in consequence of relatively rotating the tool and the fastener.

21. A spinning tool provided with a central pilot to engage the internal surface of a tubular fastener of ductile metal, and with a circular series of ribs having smooth operating surfaces formed to turn back and clench the fastener with a spinning action. 22. A spinning tool provided with a central pilot to engage the internal surface of a tubular fastener of ductile metal, and with a circular series of ribs having smooth operating surfaces formed to upset and clench the fastener, said ribs having ratchet-shaped profiles and being skewed from radial positions to work the metal of the fastener outwardly in consequence of relatively rotating the tool and the fastener.

In testimony whereof I have signed my

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