US1223053A - Machine to insert needle-latch rivets. - Google Patents

Description

1. J. JENKINS.

MACHINE T0 INSERT NEEDLE LATCH RIVETS.

APPLICATION FILED NOV. I9, 1915.

Patented Apr. 17, 1917.

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I. I. JENKINS.

MACHINE T0 INSERT NEEDLE LATCH RIVETS.

APPLICATION FILED NOV. I9. 1915.

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I. I. JENKINS.

MACHINE T0 INSERT NEEDLE LATCH RIVETS.

APPLICATION FILED NOV. 19. 19I5 Patented Apr. 17, 1917.

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vI. I. JENKINS. MACHINE T0 INSERT NEEDLE LATCH RIVETS.

APPLICATION FILED NOV. I9. I9|5. 1,223,053. Patented Apr.17,1917.

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MACHINE T INSERT NEEDLE-LATH RIVETSJ.

Specification of Letters Patent.

ratentea'apr. 17,1917.

Application filed November 19, 1915. Serial No. 62,440.

T0 all whom it may concern.'

Be it known that I, JOHN J. JENKINS, a citizen of the United-States, and resident of Manchester, in the county of Hillsborough and Stateof New Hampshire, have invented an Improvement in Machines to Insert Needle-Latch Rivets, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the Vdrawings representing like parts.

My present invention is a machine to insert rivets, particularly intended for use in inserting rivets in needle latches of knitting machines, and the object of the invention is to improve and perfect such machines.

Theneedles of knitting machines are provided with small latches to cooperate with the hook of the needle, which latches must be pivotally secured to the needle in such a manner and loosely enough to allow a thread to swing the latch on its pivot. latches and the pivots or rivets which hold the saine to the needles, are necessarily very small in size, and it has been peculiarly difficult to thread the rivets through the holes in the needle and through the hole in each latch, in assembling the same and also to perform such threading action without injury or distortion to boththe needle and its latch.

In my prior Patents Nos. 432,802 and 432,943, issued July 22, 1890, I showed and described machines for facilitating the threading of rivets in needle latches and these machines have been employed in this work since their invention. My present invention, however, is an improved machine organized on novel lines and adapted to greatly facilitate the rivet feeding oper-- ation. Special'features are novel means to hold, to carry, and to feed from a coil of wire from which the rivets are cut; to partially point the end of the wire after each rivet-cutting voperation to remove any bur or roughness left on the end of the wire and to assist in the threading of the successive iivet; to impart to the rivet point during its latch-threading movement a rotative action to insure its correct and accurate feeding through the needle and latch holes; and to control the length of each rivet, extent of feed thereof, and the mechanism for feeding same. By my invention of a relative rotative movement betweenA the rivet being fed preferably including a rotation of the.

These entire coil of wire and feeding mechanism before a particular' rivet is cut therefrom during the threading action of the rivet in the needle and latch holes, automatically 60 compensates for. and overcomes any slight inaccuracies whichvare ordinarily present in having the rivet, needle and latch all in alinement, or in register, this relative rotative movement instantly serving to enable the rivet point to lfind and be threaded through holes or recesses therefor in needle and latch. It furthermore acts to center the latch itself, which is loosely positioned be-V tween the needle holes, and thus prevents injury to needle, latch, or the lrivet itself, while greatly facilitating the threading action. Y

Other objects of the invention, important features, details of construction and novelv combinations of parts will be hereinafter more fully pointed out and claimed.

Iteferring to the drawings illustrating a preferred embodiment of my invention, Figure 1 is a plan View of my improved ma- 80 chine; Fig. 2 lis a vertical View partly in cross section on the line 2 2 of Fig. 1; Fig. 3 is a view partly in cross section on the line 3 3 of Fig.A l; Fig. 4 is a view partly in cross section on the line 4--4 of Fig. l; 85

Fig. 5 is a,view partly in cross section on the line 5 5 of Fig. l; Fig. 6 is a viewl partly in cross section on the line 6 6 of Fig. 5; Fig. 7 is a view partly in cross section on the line 7 7 of Figf2'; Fig. 8 is a 90 detail view on the line 8 8 of Fig. 2; and Fig. 9 is a fragmentary view partly in cross section on the line 9 9 of Fig. 2; Fig. 10 is a partial view of the pointing devices; Figs.

l1 and 12 are enlarged views of details; and 95 Figs. 13 and 14 are side and plan views respectively of the needle and latch after the rivet has been threaded therethrough.

In the preferred embodiment of the machine illustrated in the accompanying draw` 100 ings, I have shown means to carry a supply of wire from which rivets are successfully cut, which wire is led to andthrough a rotating spindle, which spindle is actuated at a high rate of speed-from any suitable 'source 105 of power, and isA further operated to successively clamp, feed and thread" a Wire length sufficient for a rivet, together with means to hold a needle and its latch in position'to be threaded. I also provide adllo justable means `for all the Working parts and arrange the entire machine so that, by

a single revolution of a cam shaft and the driving wheel thereon, all the operations necessary to 1complete the threading of a needle latch will be performed duringsuch single revolution, when the mechanism will be stopped automatically, excepting the rotation of the spindle, which may or may not be stopped. By having the spindle continuously rotating, except during the momentary wire-feeding actions which will be described, and the needle and its latch fixed, 1 secure the important advantage already noted of a relative rotative movement between the rivet threading mechanism and the needle, such relative rotation enabling the rivet to find and be fed through the needle and latch holes. While it may be feasible to have the rivet fixed and the needle and latch given the relative rotative movement, I consider that the arrangement as shown in the machine of the drawings is simpler and better from the mechanical viewpoint. 1n combination with the threading of the needle latches I also utilize an automatic wire-cutting means to sever each rivet, and wire pointing or gripping means all moved in synchronism.

The machine is in the form of a simple, compact,` bench machine, having a work table 1 supported by pairs of legs 2, 2 and 3, 3, which table is provided with depending lugs at opposite ends 4 and 5, to constitute journal bearings for the cam shaft 6 which extends underneath the work table 1 entirely out of the way, and on which the various cams for operating the spindle feeding, wire gripping, "pointing, threading, and cutting mechanisms are actuated. I prefer t0 rotate the spindle itself froni a separate source of power as will be described. At one end of the cam shaft 6 is a toothed wheel 7 with its hub 8 adjustably secured to the end of the shaft 6 by a set screw 9, with its teeth arranged to mesh with a pinion 10 on a short shaft 11 also mounted underneath the table 1 in a boss 12, and adapted to be connected to a, pulley 13 through actuation of a clutch. This clutch may be of any suitable type and is designed to be controlled by a hand lever 1 4 so that the operator on depression of the outer end of the lever 14 will connect the pinion 10 with the constantly rotating pulley 13 and the gear 7 and cam shaft 6 will receive motion for one complete revolution, -when the clutch is automatically disconnected and the cam shaft stopped.

a cam 23 on the rear of the hub carrying the pinion 10. Also bearing against the hub of said pinion (see Fig. 6) is a flange 24 normally pressed forwardly by a spring 25 in a recess 26 in the boss 12, so that on depressing the handle 14 and raising the rearward portion 17 of the lever when the latter is holding the pinion 10 withdrawn from contact with the continuously moving pulley 13, the spring 25 will press said pinion forwardly, allowing the interlocking studs, 27 on the pinion and 28 on the pulley 13, to interlock, imparting rotation to said pinion. As soon as rotation is imparted from the pinion 10 to the gear 7, the stud. 18 on the lever 14 is engaged by the face cam 19, which acts to hold said lever in raised position until the completion of one revolution of the gear wheel 7 and cam shaft 6. Near the end of such revolution the cam 19 permits the rear portion 17 of said lever to drop downwardly, whereupon the depending strip 21 is engaged by the cam 23,'withdrawing the pinion 10 from its clutch engagement with the pulley 13 and stopping the machine. Thus the operator simply depresses the lever 14 and then releases it, the machine automatically completing its operation and stopping ready for the removal of the rivet inserted needle latch and the positioning of a needle and latch in the holder for a second rivet inserting operation. I prefer to mount the pulley 13 loosely upon an extension 29 of the shaft 11, a collar 30 acting as one guide for the inner rim of the pulley 13, while a washer 31 held onto the shaft 11 by a set screw 32 threaded into a tapped recess in the end of the shaft 11, constitutes the outer retaining means for the pulley 13, the latter rotating freely on said shaft. 1 conveniently arrange an adjustment lengthwise of said shaft 11 by means of the set screw 33 (see Fig. 3), permitting adjustment to facilitate engagement and disengagement of the clutch members 27 and 28.

The holder for the latch and its needle is arranged approximately in the center of the table 1, and comprises a rod or bar 35 having one end supported in a track 36 secured to the table 1 by screws 37 and 38 passing through flanges 39 and 40 respectively, the opposite end being similarly supported by a bracket 41 formed on a flange 42 held to the table 1. rllhe bar 35 has a groove 43 cut therethrough near one edge, and a transverse groove 44 is in position to receive the ends of the rivet when threaded through the needle latch holes, when the needle is positioned in the groove 43, as will be explained. An adjustable guide 45 is mounted on the top of the work holding bar 35 adjacent the groove to receive the forward end of the needle latch, so that the hole through said needle which is to receive the rivet will be opposite the groove 44. The guide 45 is adjustable, by having a large slot 46 which receives the shank of a screw 47 permitting longitudinal adjustment for different length needles. I provide means to sever the wire constituting the rivet when the wire has been inserted, and for this purpose provide a knife 48 (see Fig. 2) mounted in a block 49 and held therein by a set screw 50. Preferabl this knife is circular, and a new edge may be, at any time, brought into 'play by loosening the set screw 50 and giving the knife a slight rotation. rEhe block 49 is moved upwardly to sever the wire by a cam 51 on the shaft 6, directly underneath the block 49` and working through a slot 52 in the table 1, said block being pivoted by the screw 53 to a post 54 rigidly supported on top of the table 1. The block 49 is preferably formed with a depending shoe 55 to bear upon the cam 51 (see Fig. 4) and is also formed with a lug 56 eto-which is connected a coil spring 57, having its other end connected at 58 to a fixed part of the table, whichacts to hold the block 49 and its shoe 55 in contact with the cam,51. Also mounted in the post 54 are a pair of positively acting jaws 59 and 60, extending in line with theV groove 44 and being normally held open by a spring 61 at the rear thereof. These jaws are adapted to clamp and point the end of the wire after it has been severed by the knife 48, to remove any bur left on the wire by such cutting, and to furthermore point the end of the wire, somewhat, to facilitate its entering the rivet holes in the needle and latch during the subsequent threading ,action when the wire is fed forwardly. I prefer to lit these jaws with hardened steel members 62 which may be readily renewed when worn by this wire-pointing action. To operate the jaws the rearmost portions of the jaws are so curved and overlapping, as shown in Fig. 10, to permit the stud 63 mounted on an arm 64 projecting through a slot 65 in the table 1, to close the same against the tension of the spring 61 when the stud 63'is rocked forwardly, or to the right, viewing Fig. 10. vWhen the lever 64 and stud 63 are in normal position to the left, viewing Fig. 10, the spring 61 opens the jaws 62 and permits the feeding therethrough of the rivet wire. After the wire portion which is fed through and constitutes a rivet, has been severed, and the carrier retracted, as will be explained, the arm 64 is actuated to move the Vstud 63 and forcibly close the jaw ends carrying the members 62 to effect the smoothing and pointing action. This lever 64 is mounted on a rock shaft 66, (see Fig. 4) pivoted through a lower extending bracket 67 secured underneath the frame l. The other end of the shaft 66 has a lever 68 extend-l spring 71 havingl one end attached to the lower part of the table 1 and its other end attached to the arm 68, exerts tension to hold the lever 68 and shoe 69 in engagement with said cam 70. Both of the cams 51 and 70 may be carried by a hub 72 which is secured to the shaft 6, as shown in Fig. 2.

The wire holding, feeding, and rotating mechanism is mounted in a slide 73 adapted to slide in, and be held by, guide-ways 74, 74l held on top of the table l by screws 75. This slide is 1n alinement with the groove 44 in the work holder 85 and has two fixed posts 76 and 77 containing journal bearings for a hollow shaft 78 carrying a pulley -79 secured thereto by a set screw, and positioned on said shaft between the posts 76 and 77, which pulley has a groove 8O adapted to receive a belt from any suitable source of power and to be rotated thereby at high speed independently of the other moving parts of the mechanism. The pulley 79 con- -tains the wire feeding mechanism, and said pulley has a transverse notch 81, which notch is at appropriate times engaged by a sliding stud 82 (see Fig. 8), arranged to slide vertically through a guide-way 83 in the slide 73 rlfhis sliding stud is formed hollow to receive a plunger 84 held therein by a pin 85 passing through said plunger, and adapted to traverse slots 86, which plunger is normally pressed outwardly by a spring 87. A cam 88 on the shaft 6 .is secured to said shaft in a position, at appro- Y priate times, to engage the plunger 84 and normally move the sliding stud upwardly with its prong 89 in contact with the surface of the pulley 79, against the tension of the spring 87, until the groove 8l in said pulley and the prong 89 engage, whereupon the pulley 79 is temporarily held aga-inst rota- Y tion while the belt slips into the groove 80.

lAs indicated in Fig. 8 the rotation of the pulley 79 is in the direction of the arrow, andl prefer to form one wall of the groove 81 of slightly greater diameter than the remaining surface of said pulley, to constitute a stop 90 against which the prong 89 will strike, to insure the spring 87 forcing saidv prong into the notch 81. The spring is enabled to effect this movement because of the compression thereof byv the plunger 84 when engaged by the cam 88, which is suflicient to overcome the downward tension of a leaf spring 91 held by a screw 92 and normally tending to move the slide 82 down-V wardly with the prong 89 out of engagement with said pulley.

Contained within the hollow shaft 78 is a sleeve 93, having its rearmost portion threaded at 94 to receive `a threaded nut 95, said nut having gear teeth 96 cut therein. The forward end of the-sleeve 93 is slotted and carries jaws 97 and 98 in the respective por-- tions separated by said slots. Said jaws having a conical beveled portion 99 (see Figs. 1 and 2) to cooperate with the correspondingly beveled end portion of the outer shaft 78. I also prefer to have the gripping or wire-holding portions 100 of said jaws separable, being held by screws 101 therein to permit the interchangeability 'of said portions 100. This arrangement allows me to provide pairs of jaw portions 100 with different sized grooves to t different sized wire. When the outer shaft 78 is held from rotation by engagement of the prong 89 and notch 81, and the nut 95 is rotated to move the sleeve 93 'to the left, viewing Figs. 1 and 2, the engagement of the beveled surfaces will cause the jaw portions 100 to be compressed upon the wire 102 held therebetween, thus gripping the same. Reverse movement of the nut 95 releases the jaws, the inherent tendency of the forward split portions of the shaft 93 being to expand when permitted by the forward movement of the beveled portion 99. rotate the threaded nut 95, l provide a rack bar 103 fitting the same to slide on top of the table 1, which rack bar is actuated through a lever 104 pivoted at 105 to the table 1 and also pivoted loosely at 106 to an ear 107 of a link 103, said link being in turn pivoted at 109 to the member 110, constituting a part of the rack bar 103 through engagement of bolts 111, said bolts providing for slight lateral adjustment through slots of slightly greater diameter than the shank of said bolts. The other end of the lever 104 is also loosely pivoted at 112 to a slotted ear 113 on a sliding bar 114. A spring 115 has one end attached to the bar 114 and its other end to a fixed stud 116 on the table 1. The sliding bar 114 carries a stud 117 (see Fig. 1) in position to be engaged by the pin 118 on the inner side of the wheel 7 to impart to said bar a quick sliding movement against the tension of the spring 115, thus oscillating the lever 104 on its pivot 105 and reciprocating the rack bar 103. |The rack bar 103 is normally below the line of mesh with the teeth 96 of the threaded nut 95, and therefore l provide means to raise the rack bar and hold the same into mesh with said nut during the reciprocation just described, which is in a direction to move the sleeve 93 forwardly at the same moment that the pulley 79 on the shaft 7 8 is engaged by the sliding stop 82 and held from rotation, thus moving the sleeve 93 forwardly to open the jaws and release the wire, which jaws are held open until the entire slide 73 is retracted a sufficient distance to get another grip on the wire 102 and permit a rivets length projecting from the jaws 97. Thereupon the spring 115 retracts the lever 104, reversing the movement of the threaded nut 95 to clamp the jaws onthe forward portion of the sleeve 93 firmly upon the wire thus fed therethrough. During such retracting movement of the slide and wire -holding chuck, the pointing and straightening jaws 62 are in engagement with the end of the wire left after the preceding rivet cutting action, and serve to hold the wire against retractive movement of the slide 73 and the wire-holding chuck, holding said wire stationary during the retraction of the entire chuck. To effect the movement just described ll provide a cam strip 119 on the wheel 120 adapted to strike upon a projecting stud 121 carried by the slide 103, lifting the slide into meshing engagement with the gear 95 during the reciprocating movements of said slide above described. To reciprocate the slide 7 3 in its guide-ways, a tail piece 122 (see Fig. 2) projects rearwardly in line to be engaged by the cam 123 also carried on the wheel 120 to force the slide 73 forwardly during its rivet feeding. The slide is retracted in its rearward movement to the left, viewing Figs. 1 and 2, by a cam 124 (see Figs. 9 and 16) which projects through a slot 125 in the table 1 and strikes against the forward end of the slide 7 3. 1 form the forward portion of the slide 73 with a grooved section as indicated at 124, and also bevel the end of the cam 124 to facilitate this action, as further illustrated in Figs. 11 and`12.

1n addition to the forward feeding movement of the slide 7 3 carrying the wire-feeding chuck, a separate feeding movement of .said chuck is imparted by the cam strip 126 preferably carried on the rim of the wheel 120 striking against the collar 127 on the shaft 123, comprising the inner portion of the wire-holding chuckand the bearing for the sleeve 93, moving the entire chuck forwardly while the chuck is rapidly rotating, through rotation of the pulley 79. 'llo return the chuck against the movement of the cam 126, a spring 129, Figs. 1 and 2, be-

tween thc fixed posts 7 6 and 77 of the slide 73 and the pulley 79 is provided, thus proif'iding an independent longitudinal movement of the chuck in addition to the reciprocation of the slide 73.

llt will be appreciated that the wire may be led into the chuck and fed forwardly in any desired manner, asr from a reel or the like, but in view of the rotation imparted to the wire during the gripping of the jaws 97 and rotation or the chuck while fed forwardly to thread the rivet, l prefer to mount a supply or reel of wire directly upon the shaft 128. To this end 1 apply a bracket 130 to the post 77 of the slide 73, securing same by a screw 131, which bracket extends rearwardly and has a lug 132 bored to constitute a bearing for the continuation of the shaft 123. rllhe rearward end of said shaft is forked at 133 and 134 to receive a reel 135 containing the wire 102, the entire shaft 123 being bored to lead the wire from said reel to the gripping portions 100 of the jaws 97 and 98. When the reel 135 is exhausted, it may readily be replaced with another full ree v The operation of my machine will be readily understood from the foregoin, ;l description. The wire-holding` chuck having been fitted with the wire-gripping portions 100 in its jaws 97 and 98, which wire-gripping portions are of appropriate grooved surface to grip a wire of predetermined diameter, and the reel 135 applied with the wire threaded therethrough, the machine is ready for operation. A needle 136 with the latch 137 fitted in the groove 138 Ain said needle, provided therefor, is slid by the operator in the groove 43 with its hook portion 139 abutting against the guide 45, said guide having previously been adjusted so that the length of needle to be operated upon will have the perforations to receive the rivet 140 in line with the groove 44 in the work holder 35. Meanwhile, the pulley 79 is under constant rotation from any suitable source of power and the pulley 13 is also constantly rotated. The operator thereupon depresses the hand lever 14, the clutch between the pulley 13 and pinion 10'is operated to rotate the same, which simultaneously imparts rotative speed to the gear 7 and cam shaft-6. The operator releases the lever 14 and the machine will complete one rota-tive movement of the cam shaft, when the clutch on the pinion 10 will automatically be thrown out of engagement with the pulley 13, and the machine stopped. The rotation of the cam shaft 6 first brings the cam 123 into engagement with the slide 73, forcing the same forwardly and immediately thereafter the' cam 126 imparts a further forward feeding movement to the chuck, which is rapidly rotating, threading the projecting portion of the wire 102 through the rivet holes in the needle'and latch, the rotative movement imparted by the rotation of the chuck to the wire aiding in this rivet threading action during the forwardly feeding movements just described. Should any slight inaccuracies in alinement, straightness of wire, adjustments, or the like be present, nevertheless this relative rotative movement between the wire and the holes being threaded will automatically center the wire relatively with the needle and latch holes, and instantly enable the wire to find its way. While the chuck is thus fed forwardly and the final forward feeding movement completed, the cutting knife 48 is moved upwardly by the cam 51, quickly and easily severing the wire which is still under rotation. The needle threading operation is now complete, so far as the threading of the rivet 140 into the needle and latch is concerned, and the operator may remove the threaded needle and has sufficient time to effect this removal and replace another needle and latch in position in the groove 43 of the work holder,'during the4 completion of the successive movementsof the machine. r1`he cam 126 first releases the chuck, permitting the same to be forced backwardly by the spring 129 between the post 76 and pulley 79, which spring irst moves the outer part 78, while the chuck jaws 97 and 98 are opened by rotation of the gear 96. The jaws 59 and 60 are closed upon the remaining lprojecting portion of the wire 102, said jaws being thus actuated by the lever 64 and the cam 70, swinging the portion 62 in said jaws quickly and forcibly down upon the endof the wire and closing same against the tension of the spring 61, which opens them, removing any bur whichV may be left by the cutting action, and also acting to slightly point this projecting end of the wire. While the wire is thus held in the jaws 59 and 60,the nut 95 is rotated, the rack bar 103 being raised through engagement with the cam 119 against its stud 121, into mesh with the teeth of the nut 95 and rocked' by the swinging of the lever l104, thus quickly forcing the sleeve 93 forwardly, allowing the jaw portions of same to eX- pand, being` released from the beveled surfaces 99 on the -outer shaft 78. This action releases the wire 102 from the grip of the jaw pieces 100, and thereupon the cam 123, having passed free of engagement of the tail piece 122 of the slide 73, said slide is retracted by the cam 124. In order to permit the nut 95 to be thus actuated, the pulley 79 has been stopped through the cam 88 forcing the slide 82 upwardly, against the tension ofthe leaf spring 91, the prong 89 of said slide engaging the wall orstop 90 adjacent the notch 81, and holding the pulley 7 9 stationary while the Vbelt in the groove 80 therein slips. While the entire chuck and slide 73 are thus being retracted and the wire 102 released from the chuck jaws, saidv wire is still held against retractive movement by the smoo-thing and pointing jaws 59 and 60, so that said wire is unwound from the reel 135 as the chuck is retracted. This retracting movement is suiiicient to provide a feeding length of wire through said jaws, whereupon the spring 115 draws back the lever 104, again rotating the threaded nut 95 in a direction to draw the beveled faces 99 together, forcing the jaws 97 and 98 inwardly, and thus gripping the wire in a new position. The rack bar 103 is then lowered, the slide 82 released from engagement with the pulley 79 through the passing of its cam 88 and the downward tension of the leaf spring 91, again permitting the chuck to rotate, the jaws 59 and 60 are opened and the clutch on the-pinion 10V thrown out and the machine stops in readiness for a successive rivet threading operation. lf the operator has removed the threaded needle and latch and replaced one to be threaded in the work holder, the lever can be held downwardly and the cycle of operation, just described, repeated without the stopping of the machine. It will be understood that the rotation of the wireholding chuck is not stopped with the stopping of the rest of the mechanism, but is only momentarily checked by holding the pulley 79, as above explained. lf the operator is delayed in removing the threaded needle and the placing of a successive needle and latch in position, the machine will, of course, stop in readiness to receive the next needle and latch, and as soon as same is positioned and the operator depresses the lever 14, the rivet threading, cutting, feeding, etc., operations are automatically repeated. llt may be desirable to utilize the slide bar 150 Working in the slide 151 to actuate a yielding plunger 152 (see Fig. 2), to hold and support the knife block 49 more firmly, during the cutting and then to release it, but this is optional and not essential to the working of the machine.

My invention is further described and defined in the form of claims as follows:

l. A machine of the class described, comprising automatic rivet threading mechanism, including means to hold anV article with a perforation therein, adapted to receive a rivet, rivet Vholding means, mechanism to rotate said rivet holding means and automatic mechanism to feed forwardly said rivet holder` during its rotation, at predetermined times, in combination with means to retract said holder while leaving the rivet so fed threaded in said recess.

2. A rivet threading machine of the class described, comprising means to hold an article having a plurality of perforations in alinement to receive a rivet, means to hold a rivet to be threaded into said perforations, automatic means to impart a relative feeding action of said rivet and article in combina- Copies of this patent mav be obtained for tion with means to simultaneously impart rotation to said rivet relatively to the article during the feeding action, and mechanism to cut off said rivet after threading.

3. A rivet threading machine of the class described, comprising means to hold an article with a perforation to receive a rivet, means to hold a rivet to be threaded into Said perforation, and automatic means. to partially point the end of the rivet prior to threading the same into said recess.

l. A rivet threading machine of the class described, having means to hold a needle and latch to be riveted, meansto hold a quantity of rivet material, automatic mechanism to feed forwardly, a predetermined length of said material to thread the latch and needle therewith, means to rotate the rivet material during such feeding action, a cutter operable at time intervals to separate a rivet length from the material during the rotation of the latter and a pair of clamping jaws adapted to remove a bur after a rivet has been cut from the rivet material and to Vpartially point the lsaid material preparatory to the succeeding threading action.

5. A rivet threading machine of the class described, having means to hold an article with a recess to receive a rivet, means to hold a coil of wire from which rivets are severed, means to predetermine the length of a rivet to be cut from said wire, means to feed said wire forwardly to thread the end thereof into said recess, means to cut the threaded portion from the wire, means to remove the bur from the end of the wire coil where cut, and means to point said wire where cut, in combination with mechanism to rotate said wire holder at a high rate of speed.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN J. JENKINS.

W'itnesses CHARLES H. CARLETON, AUSTIN H. JENKINS.

ve cents each, by addressing the Commissioner of Patents. Washington, D. G.

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