US1318378A - Planooraph co - Google Patents

Description

A. L. HANSEN..

POINTING MACHINE.

APPLICATION FILED NOV. 25. ms.

Patented Oct. 14,1919.

6 SHEETS-SHEET l.

N WN

i -ww N THE COLUMBIA PLANOORAPH c0., WASHINGTON, D. c.

A. L. HANSEN.

POINTING MACHINE.

APPLICATION FILED NOV. 25, ISIS.

mmsm.

Patented Oct. 14,1919.

5 SHEETS-SHEET 2.

llllllymm m cm mmn I'I.'\NOGR.\I'II c0., WASHINGTON, n. L.

A. L. HANSEN.

POINTING MACHINE. APPLICATION FILED NOV. 25. I918.

Patent/ad Oct. 14, 1919.-

6 SHEETS-SHEET 3.

A.L.HANSEN.

POINTING MACHINE.

APPLICATION FILED NOV. 25.19l8.

Patented Oct 14, 1919.

6 SHEETS-SHEET 4 .N% m Q MN kn Nu MN NW NW NW A. L. HANSEN.

POINTING MACHINE.

APPLICATION FILED NOV. 25. I918.

1,31,378. Patented -0@t. 14,1919.

6 $HEETSSHEET 5.

ll? J35 A. LL HANSEN.

POINTING MACHINE.

APPLICATION FILED NOV. 25. 1918.

Patented Oct. 14:, 1919.

6 SHEETSSHEET 6.

PQINf-EING-MACHINE.

To all wit-0m it'mayvooncem Be it knownthat LAUG L. HANSEN, 2L, CltlZeILOf' the United States, and a-resident. of Evanston, in the county of, Cook and State of Illinois,.have inventedcentain new and useful Improvements in Pointing-Machines, of'which the following: is a, specification.

My invention relates to .pointing. machines, particularly to that, class in which the ends of wire lengths are tapered, pointed, or; otherwise formedby swaging.

Theobject of my invention is to provide a simple,tvery efficient attachment for swag.- ing machines which entirely, automatically accurately feeds the wiresone at a time to, the swaging tool, holds thewires rigidly and with uniform pressure duringthe swaging operation,- and then withdraws and delivers the wires. Allv that is necessary for the operation offthe rnachine is to keep the supply hopper filledzwith blanks to be pointed.

The various features of my invention are fully disclosedinthe following specification and illustratedvon the accompanyingdrawings, in whichf Figure 1 is aplan view with partsbroken away to more clearly; show the construction and, operation, a

FigQQis an end elevational'fview,

Figv 3 is an enlarged sectionalview on plane 33,Fig,;1',

F'g, 4L isa sectionalview on plane 4 1; Fig, 3,

Fig. 5; is an, enlarged sectional, view on plane 3 3', Fig, 1,. showing another position of. the working parts from that shown,

Fig. 6 is a sectional view on plane-6 6;; Fig.1,

Figs? is a view from the left endof Fig, 6;

Fig, 8xis a. sectional, view on plane 89-8, Fig; 7, V

Fig. 9 i's,:,an enlarged sectionaliview s-i-mi lar to Fig, Gshowing the inner: position of; the wire blank, feeding frame,

Fig, 1 0 is a sectionalview on p1ane10l0," Fig. 9,,and}

. Fig. ,11 isa front view, ofJthe swaging tool with, parts broken away.

1, represents the supportingbed of -the' .niachineat one side of. which, is mounted, the stationary cylindrical frame 2; of the swag: ing, tooh. this; frame having, the cylindrical centrall pocket; 3 in its front, Side around; wh chithe abutment rollers 1 are journaledi' paraIIel-With the frame axis. Journaled'in, the frame axially thereof is the shaft 5.v

w-h0$e'ii1ner end'supports the head Ghaving thershape of; the end, desired on the wares, the dies show-n being adapted to; p0int;,Wire' blanks for, formingknittingneedles. In the;

ends, ofthe dies the rollers 13.and:14 are;

joul'naled. in, pockets and eX-tenda distancebeyond the die frame outer ends. When. the.

head6 isrotatedlthe rollers 13 and' 14: $110 cessively, strike the rollers 4s in the frame 2jsotbat the dieframes and dies arerapidly; subjected to successive blows. which trans I Specificationof LetterstPatentt PQtgntgdaQei-g 14; Applicatiomfilefi nove beras, 191 s, S,eria1;No.-2B3-,970;. i 7 i mitted'to the wire end will swage theendto; J

the desired form. At the outer-- end the shaft 5 has the pulley 15'which is connected, by; belt, 16 with a suitable driving, shaft,- The; mechanism thus far described is well" knownin the art, and my invention, covers anattachment in the form'ofjmechanism for automatically feeding wire blanks, holding them during; swaging, and withdrawing and; delivering themf V 011. one side of, the bed. 1, the-framework, 17' is? secured which. afi'ords support and. bearing for; the various attachment parts, In the standard 18-on frame 17 and lIl -thef bearing standard" 19 separately, attached; to

the bed 1 is journal'ed: the countershaft; 2Q

which, is parallel-with the shaft 5 and. has atone end. the pulley 21 connected: by belt 22, with the pulley; 23 ofthe shaft?v 5; Near the. bearing standard: 18' a worm 24: is secured to; the shaft20- and meshes with the worm wheel 25 secured; to .the verticalgshaft; 26' which a is j ournaled 7 in the step bearing, lug, 27: and the bearing arm,28iextending from the standardj18. Above thearm 28the shaft 261- has secured-thereto the upper and lower cam disks 29and30 respectively. The disk 29, has the cylindrical section 31extending practical y n nety degreesand the spiral section 32; The cam disk 80'has the cylindricalf outer surface except forthe radial arm 33; At theendof th'e arm 34' extendsing forwardly from the top of standard 18 the rock lever 35 is pivoted intermediate its iiids by the pin 36; The front section of "the lever iscurved as 'shown'and at its end journals the'cam roller 37 which coiiperates with the surfaces of-thei cam disk 29. The

inner sectionof .the lever 35 is connected with the wire blank gripping and shifting mechanism which will now be described.

At one side of the table 1 and in alinement 7 with the axis of the swaging tool a horizontal guide frame 38 is secured on the top of the supporting standard 39 which is secured on the table 1. As shown in Fig. 2, this guide frame is of rectangular cross section and has the cylindrical passageway '40 extendingjfull length therethrough. Slidable within this passageway is the wire gripping and supporting'mechanism whose end block 41 has the stud 42 extending upwardly there from through the longitudlnal slot 43 in the top of the frame 38, the bar 44 engaging the top of the frame being received at its outer end by the stud 42 and at its inner end has surfaces.

secured toit the stud 45 which engages in the slot 46 in the inner section of the cam' lever35 so that as this cam lever is rocked the head 41 with all parts connected there. with will be reciprocated in the frame 38.

A spring 47 connecting between the inner end of the lever 35 and the stud 48 on the frame 38 serves to resist swing of the lever and to holdits cam roller against the cam Secured to the block 41 is the spring barrel 49 for the compression spring 50. Threading axially through the block isthe stem 51 whose inner end carries the abutment 52 for one'end of thespring, the lock nut 53 looking the st m in any adjusted sition," At the-other end of the barrel is the abutment head 54 from which the neck 55 extends outwardly through the opening.

clutch fingers 64 extending from the base 65 which is threadedly secured to the clutch head 59... .-:The outer ends ofthe fingers have the conical radial wings 66 whichare within the conical mouth 67 of the frame 68 secured to. the inner. end of the chuck frame by the set:screws 69." Normally when the spring 60 .holds 1 the clutch head 59 against the shoulder-61the ing endsof the fingers are oleanofthe conical walls'of the mouth'67 Y and the fingers are free'to spring apart for the entrance of the wirejends, as shown in Fig. 3;: When the clutch head is drawn outwardly away fromthe shoulder the wings engage with the conical mouth sides and the fingers are drawn togetherto securely clutch the received end of the wire.

The stem 51 and the plunger member,- 55

have axial passageways 70 and. 71 respectively through which extends the rod 72 which is: secured at its inner end to the clutch head 59. The outer end of the rod is pivoted-to the upper end of a lever 73 pivoted at an intermediate point to the end of the post 74 projecting from the standard 39. The lower end of the lever has an eye 75 which receives the rod'7 6. This rod terminates at its inner endjin the abutment head 77 for the compression spring 78 within the barrel 79, the head 80 of the barrel forming the other abutment for the spring. The barrel is pivoted at its inner end on the lug 81 extending from the standard 39. At

its outer end the rod 76 has an adjustable abutment 82 for the lever 73. As shown,

this abutment is formed by two nuts threading onto the stem?- 7 5 Figs. 1 and 3 show the normal position of the feeding and holding mechanism, that is, the position just before a wire is to be received, and fed to the swaging mechanism. The wires are fed one at a time into position .in axial 'alinement with the chuck mechanism andthe swaging mechanism by feeding mechanism which will be described later. As shown in Figs. 1 and 3, a wire blank 6 is held in such position. The cam 29 rotates in the direction indicated bythe arrow, Fig. 1, and while the cylindrical surface 31 isin engagement with the cam roller 37 the lever 35 will not move. However, as soon as the comparatively abrupt approach '83 to the'spiral surface 32 encounters the cam roller the lever will be of the chuck-frame, the spring 50will cause the plunger member 55 and the chuck frame 57 to travel withthe head 41. As-the chuck frame is shifted inwardly thechuck fingers.

receive between them the adjacent end of the wire 5, the end of the abutment stem 63 i then engaging with the wire end.f Up to this time the lever 73 is swung but not sufficiently far to engage with the abutment'x82. However, as soon as the end of the stem 63 reaches the wire end the lever 73 will engage the abutment 82and then during further bodilyinward movement of the chuck members swing of the lever 73 will be resisted by the springs 78, the result being that tension is applied to the rod 72 which overcomes the compression of spring 60 and causes the head 59 to be shifted inwardly so that the wing ends of the clutch fingers encounter the conical walls ofthe mouth 67 and the fingers'are forced radially inwardly to Sc curely clutch thewire. As the clutch mechanism moves inwardly the resistanceby the head 11 continues gradually. and power-,

fully while the spiral cam surface 32 is engaged by the cam roller, the spring exerts increasing pressure against the plunger neck 55 and the chuck frame and the wire is gradi'ia lly but yieldingly forced to the base of the die opening 12, and during its travel through the die-opening the end of the wire is quickly swaged inf-to form, the increasing force of the spring 78 du'r-ingsuch travel of the wire tlrroughmthe die opening causing the wire to be firmly held against displacement. The wire is not positively forced into the die opening but the spring 50'causes it to be yieldingly but powerfully shifted during the 'swaging operation until its end has been fully and accurately 'swaged to form; The clu'tchfingers are also yieldingly though powerfully held against the wire. This yielding support and shifting of the wire will prevent injury 'to 'the working parts should any obstruction beencountered.

After the wire has been fully shifted into the die pocket the cam surface 32 will abruptly leave the cam roller 37 so that the spring 47' acting on the release lever 35 will swing 'the lever to its normal position and shift the chuck mechanism parts out to their normal position in the frame 38. During the fore part'of such outward movement the lever 73 will still be engaged by theabutm'ent 82 and theclutch 'fingers'will maintain their grasp on the wire and the wire will be withdrawn from the swaging' mechanism and placed in discharge position on the feeding mechanism. After this is accomplished the lever 73 will leave the abutment '82 ands'pringi60 will then be free to shift the clutch head inwardly to permit the clutch fingers to spread apart and re.- leasethe wire. When the clutch mechanism then has been fully :returned -to its outer normal position the wire will be entirely out of the clutchfingers'and the mechanism will be in normal position ready to receive another wire. I V

The wire blank feeding andsupporting mechanism is best shown in Figs. '1, 6, 7 and 9. The standard 84 mounted on the table 1 hasthe front and rear walls 85 and 86. Supported on the standard 84 is the platform 87. This platforni is rhinged at its outer-end on the pin 88 supported by the wall 85, the platformextendinghorizontally and normally resting atits front end ontop of the wall 86. On its sides the platform has the guide ribs 89 and 90 'for cg'uiding the reciprocation of the U-shaped feeding 94 and 95 on the outer end of the platform.

Pivoted at its elbow on the pin 96 on the platform is the L-shaped lever '97. One arm of this lever journals at its end the cam roller 98 which cooperates with the cam '30 on shaft 26. The other :end of the lever has the longitudinal-slot 99 receiving the pin 100- extending up from the slider plate 92. The slider plate and Uframe 91 are s'hiftable in a direction at right angles to the'axis of the swagii'ig tool. When the cam arm 38 reaches the cam roller 98 the lever 97 is swung to shift the slider plate and U-frame outwardly, and the spring 101 shifts the frames outwardly.

Secured to the platform and bridging over the Iii-frame 91 is the block 102. This block has the V-shaped slot 103 therethrough over which. the hopper 104 is mounted, the wire blanks 7) to be ended being charged into this hopper. Upright posts 105 form the front abutments for the blanks. At their outer ends the arms 91 and 91 have their upper corners beveled and there provided with . transverse grooves 106 and 107 respectively. As the U-frame 91 is shifted outwardly these grooves will travel below the'outlet of the hopper and a wire blank *will fall into the :groovesand will be carried'outivardly'into thev axial line of theswaging tool and the chuck mechanism. At its inner end the block 102 has the vertical slots 108 and 109 over the path of the arms '9 1 and 91 and in these slots the rectangular plates 110 and 111 are pivoted on pins 112 extending through the inner'corners thereof. In the lower end of each plate is the rectangular notch 113 in which a roller 11 1 is ournaled on a pin 115. The inner end of the roller is slightly tapered so that a blank on the end of the U-frame arms can readily be carried under the *rollers(:Fig. A rod 116 extends through the upper outer corners ofa'the blocks-and 'a spring 1117 connects between this' rod and the bracket 118 stationarily secured to' the outer end of 'the block. When the U-frame 91 is at the inner end of its path preparatory to picking upa blank, the blocks 110 and 111 are swung downwardly a short distance by the spring 117 with their inner lower corners abutting against the rear walls of the slots 108 and 109. When trio frame 91 is shifted outwardly its arms carry *the received blank underneath the rollers 115 and raise the roller supporting blocks against the tension of spring 117, the pressure exerted on the blankcausing it-to be securely held in the axial line of the swaging' tool and in position .to be accushown in Figs. 6", 7 and 9. The lugs 119 and 120 extending downwardly near the outer end of the platform 87 journal a shaft 121 on which are secured the dogs or discharge levers 122 and 123. The dogs have the beveled ends 124: which are adapted to be projected into the path ofthe finished blanks during inward movement of the frame 91. At one end of the shaft 121 is secured the L-shaped lever 125 whose stop extension 126 is normally held by spring 127 against the under side of the platform 87 The frame 91'has the notch 128 at one side thereof in which a camarm 129 is pivoted at its upper end to extend downwardly above the lever 125, the spring 130 tending to swing the lever against the outer wall 131 of the slot. When the U-frame 91 is at the inner end of its path the cam arm 129 will be in advance of the lever 125, as shown in dotted lines Fig. 6. The lever 125 has the cam projection or bump 132 on its upper edge and as the frame 91 is shifted outwardly the cam arm will drag over this cam projection and the'lever 1.25 will not be rotated. However, during'inward movement of the frame 91 the cam arm 129- will be prevented fromrotating by the abutment 131, and-when it engages with the cam projection 132 the lever 125 will be rotated'and with it the shaft 121 to swing the'dogs 122 and 123 upwardly to project their beveled ends 12 1 into the path of the blank sothat the-blank is lifted out of the grooves 106 and 107 and discharged. into a suitable receptacle. To permit the blanks to be lifted out of the grooves the blockf102 has the channel 133 in its under side over the path of the discharging dogs,'as clearly shown in Figs. 6 and9. When a handful of wire blanks is charged into the" hopper the wires will not always assume parallel positions and may become wedged together at the hopper outlet. Provision is therefore made to loosen up, agitate and accurately arrange the blanks at the lower endof the hopper so that proper feeding of blanks to the frame 91 will re sult. As best shown in Figs. 9 and 10, the arms 91 and 91 have the gradually inclined'longitudinal ridges 134: at their ends just behind the blank receiving grooves, and the block 102 has transverse grooves 135 in its lower side for accommodating these ridges. As the blank supporting arms travel below the hopper outlet one of the blanks'falls into the arm grooves and then the ridges-134: engage with'the lowermost blanksinthe hopper and slightly raise them and also prevent'the escape of 'nore than one blank to the supporting arm grooves. Each blank supporting arm has also a row ofagitating projections 136 whichare located a distance inwardly from the arm end and project a short distance above the arm top. These agitating projections travel be low the hopper after passage of theridges 134: thereunder, the projections engaging with the blanks and shaking and agitating them. Engagement of the ridges'and projections on the blank supporting arms will therefore cause the blanks within the hoppers to become well loosened from each other and arranged in parallelism so that they can accurately escape one at a time from the hopper to the notches in the supporting arms. Theblanks are shifted and agitated both during the outer and inner movements of the frame 91.

As the outward movement of the frame 91 is caused by the spring 1.01 such out ward movement is yielding and should there be any obstruction to'the outwardmovement of the frame and to the wire blank receiving operation, no injury will result. In order to assure outward movement of the-frame 91 into position to accurately. fitv around a received blank in the axis of the swaging tool and the chuck mechanism, the rod 93 has preferably left and right threads engaging respectively with the frame 91 and the slider plate 92, the nut 137 enabling the rod to be readily turned. After adjustment the lock nut 138 secures the rod against turning.- r

I thus provide simple and very efficient mechanism for entirely automatically feeding, wire blanks into swaging mechanism. Practically all the attendance the machine requires is keeping the hopper filled with wire blanks. Where the blanks are to have both ends formed, as for knitting needles, the blanks after formation'of one end are again charged intothe hopper'to have-the other ends formedn By referring to Fig. 3 it will be noted that the. outer end of the chuck stem 63 is concaved to receive and protect the first point formed on the blanks.

Having described my invention, I claim as follows:

1. The combination with point forming mechanism, of a hopper for blanks to be formed, feed mechanism for successively receiving blanks from the hopper and feeding and supporting them in position in front of said/forming mechanism, chuck mechanism and means for shifting it, means controlled after part movement of said chuck mechanism to cause a blank to be received and grasped at one end, further movement of sa id chuck mechanism causing said blank .head, yielding mechanism connecting misses to be shifted along said feed mechanism and inserted at its other end in said forming mechanism.

2. In a machine of the class described, the

combination of point forming mechanism,

ing mechanism and to Withdraw the formed blank and return it to normal position on said feeding mechanism, and means for discharging the finished blanks from the feeding mechanism. j v

3. In a machine of the class des'cribed,'the combination of point forming mechanism, aguide frame in aXial alinement with said forming mechanism, means for feeding a wire blank between said forming mechanism and guide frame in axial alinement therewith, a head in said frame, means 'for shifting said head, a chuck frame in ad- Vance of said head, yielding means connecting said chuck frame and head, chuck j aws in said chuck frame, said chuck jaws being normally open to receive one end of the wire blank when said head is shifted a distance in said, guide frame, meansfor closing said jaws to grasp the wire after such primary movement of the head, further movementof said head causing the grasped wire to be yieldingly, shifted toward and into said forming mechanism.

4. In a machine of the class described,

7 the combination of end forming mechanism,

a guide frame, means for shifting a wire blank between said guide frame and forming mechanism, a head in said guide frame, means for reciprocating said head in said frame, a chuck frame in advance of saioz said head and chuck frame, chuck jaws in said chuck frame, means normally holding said jaws apart, said open jaws receiving one end of the wire blank during primary move- 'ment of said head within said guide frame,

means for closing said jaws after such primary" movement of the head, further movement of'saidhead within said guide frame causing said chuck frame to be shifted to cause 'the clamped wire blank to be shifted along the feeding mechanism and with its I other end lnto the forming mechanrsm, re-- turn movement of said head within said guide frame causing said wire blank to be withdrawn from the forming mechanism and restored to normal position on said feeding mechanism, said clutch jaws being released during the latter part of the return movement of said head whereby to release the formed blank.

5. In a machine of the class described, the combination of end forming mechanism,

feeding mechanism for successively feeding wire blanks into position in front of said forming mechanism, a guide frame, a chuck frame shiftable in said'guide frame, clutch fingers within said clutch frame having wedge ends) said clutch frame having a conical mouth receiving said wedge ends, means tending to hold the Wedge ends of said clutch fingers away from said mouth to permitsai'd fingers to open to receive a blank, means for yieldingly shiftlng said clutch frame toward said forming mechanism, said clutch fingers receiving the end'of said wire blank during the primary movement of said clutch frame, means for drawing said fingers inwardly after primary movement of the clutchframewhereby the wedge ends of said fingers codperate with said conical mouth to be closed to clamp the received blank, further movement of said clutch frame causing the grasped blank 'tobe shifted on said feeding mechanism and inserted with its other end into the forming mechanism, return movement of the clutch frame causing the formed blank to be withdrawn from the forming mechanism and released from the clutch frame.

6. In a machine of'the class described, the combination of end forming 'mechanism, means for successively feeding wire blanks into position in front of said forming mechanism, a guide frame, a clutch frame within said guide frame, means for reciprocating said clutch frame in said guide frame, said clutch frame having a conical mouth, clutch fingers within said clutch frame having wedge ends for cooperating with said conical mouth, yielding means tending to shlft said clutchfingers outwardly with their ends away from said conical mouth to permlt opening of the fingers to receive a wire blank when the clutchrframe is shifted toward said forming mechanism, yielding means effective after primary movement of said clutch frame to resist themovement of the clutch fingers therewith whereby [said finger endscotiperate'with said conical mouth to clamp the received wire blank, jcontinued 'movementof saidclutch frame causing the clamped"blank' to be inserted at itso'ther endinto the forming mechanism. 7. In a machine of the class described,

the combination of swaging mechanism,

chuck mechanism in alinement with. said swaglng mechanism, feeding mechanism for feeding wire blanks one at a time into position between said chuck mechanism and swaging mechanism, means for shifting said chuck mechanism toward the swaging mechanism, means operative during initial movement of said chuckmechanism to receive and to clamp the adjacent end of a wire blank whereby said blank will then be shifted with its other end into said swaging mechanism, return movement of said llO ' chuck mechanism causing the formed blank to be withdrawn to normal position; on said feeding mechanism, and means for discharging the formed blank from said feeding mechanism. v

' 8. In a machine of the class described, the combination of end forming mechanism, chuck mechanism, feeding mechanism" for feeding wire blanks one at a'time into position between said forming mechanism and chuck mechanism, means for actuating said chuck mechanism to receive and clamp the adjacent end of a blank and to shift it with its other end into the forming mechanism, and: means on said feeding mechanism for guiding the blank during shifting thereof by the chuck mechanism. I

' 9. In a machine of the class described, the combination of end forming mechanism, chuck mechanism, feeding mechanism for feeding wire blanks one at a time'into position between said forming mechanism and chuck mechanlsm, means for operating said chuck mechanism to receive'and clamp the adjacent end of a wire blank and to shift it with-its other end into the forming mechanism and to withdraw and release it after the forming operation, said feeding mechanism forming a support and guide for the wire, blank during shifting, forming and withdrawing thereof, and means for discharging the finished blank from the feeding mechanism.

10. In a machine of the class described the combination of swaging' mechanism, chuck mechanism, supporting mechanism for supporting blanks between saidfswaging mechanism and chuck mechanism, means for operating said chuck mechanism I to grasp a blank and shift it into the swaging mechanism, said supporting mechanism supporting said blank during the entlre swag ng operation.

11. In amachine of the class described,

the, combination of point forirning mechanism, chuck mechanism, supportlng mechanism having spring jaws, means for feed ing blanks to be pointed to said jaws, and means for operating said clutch mechanism to grasp a blank and; to shift it along said spring jaws and into said point forming mechanism. 5 i r 1 seem the combination of point forming ;mecha- .nism, a chuck, means for operatingfsaid chuck to grasp a blank and shift it into said point forming mechanism and'then to return it after the pointing operation, spring jaw members adapted tosupport'a blank during the entire operation of said chuck, and means for discharging blank from said aws. 1 13. In a machine of the class described,

the combination of forming mechanism,

clutclrframe and head, clutch fingers in said frame for I6C61V111g"bl2l 11kS as .the

clutch; frame is shifted outwardly, and means for holding back on said clutch fingers with increasing tension during outward movement of the clutch frame,'wheresaid blanks. will be clutched with increasing fo-rcefas the clutch frame is shifted outwardly.

14. In a machine of the class described,

the combination of forming mechanism,"

means for feeding blanks in front of said forming mechanism, a clutch frame'having a conical po 'cket'in its front end, means for shifting said frame toward said forming mechanism, clutch fingers engaging in said conical end of the clutch frame, said clutch fingers'receivlng between them 'a blank as said clutch frame is shifted toward the forming mechanism, and means for incrcasingly resisting the movement of said clutch fingers as said clutch frame is shifted whereby a blank will be held with increasing pressure as theclutch frame is shifted.

l5.- In a machine of the class described, I the combination of forming mechanism,

means-for supporting a blankin front of said forming mechanism, clutch mechanism for receiving and shifting said'blank into said forming mechanism, and means for increasing the clutching engagement of said clutchingemeclianism with said blank as said blank is shifted 'intQ the' forming mechanism.

" In witness whereof, I hereuntoI subscribe Washington, 1); c3

y name this 20th day of November, A 12 m machine of theclass-des rib d 1 topics of t li is' patent may be obtained for'five cents each, by addressing the Commissionercf Patents,

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