US1952195A - Crank operated eyelet machine - Google Patents

Description

Marh:27, 1934. I 2. P. CANOE-E er M 1,952,195

CRANK OPERATED EYELET MACHINE Filed Feb. 2, 1953 e Sheets-Sheet 1 INVENTORS .Zenas R Candee.

15 BY Jesse B.Burton.

ATTORNEY March 27, 1934. 2. P. CANDEE ET AL 1,952,195

CRANK OPERATED EYELET IAQKINE Filed Feb. 2, 1933 e sheets-sheet 2 m 1 3 S M. 2 2 R N m m; .m ns haw Y B March 27, 1934. 2. P. CANDEE ETAL CRANK OPERATED EYELET MACHINE 6 Sheets-Sheet 4 INVENTORS Zenas P. Candee. BY JesseBBul'ton'.

ATTORNEY Filed Eebl 2, 953

March-27, 1934. -2. P. CANDEE ET AL CRANK OPERATED EYE-LET MACHINE Filed Feb. 2, 1933 6 Sheets-Sheet 5 INVENTORS .ZenasR Candee.

BY Jess B-Burtons ATTORNEY March 27, 1934. z. P. CANDEE ET AL icmmc OPERATED EYELET MACHINE Filed Febr2, 1935 6 Sheets-Sheet 6 I) ill El 2 I M 9 MM?! 1 L 4 INVENTdRs Zenas R Candee BY Jesse B.Buvton.

ATTORN EY Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE- CRANK OPERATED EYELET MACHINE Application February 2, 1933, Serial No. 654,850

18 Claims. (01. 113-40) This invention relates to multiple plunger eyelet machines for punching blanks from a strip of sheet metal and stamping said blanks into eyelets or other articles.

One object of this invention is to provide a heavy duty eyelet machine in which the draw plungers are simultaneously actuated on their down stroke by a plurality of cranks mounted on a single rotating overhead crank shaft.

A further object is to provide an eyelet ma chine of the above nature in which the upward stroke of the draw plungers is produced by a cam actuated bell-crank lever mechanism, in such a manner as to produce a rest" periodin said stroke during .which the transfer mechanism may grip the work, and move it into alinement with the next plunger.

A further object is to provide an eyelet machine of the above nature in which the blanking punch is operated independently of the other punches by a separate cam mechanism driven by the crank shaft.

A further object is to provide an eyeletrmachine of the above nature in which a novel mechanism is employed for clamping the blank in position upon the die during the cupping operation.

Further objects and advantages of the-invention will be apparent from the accompanying drawings in connection with the description which discloses an eyelet machine which is comparatively simple in construction, easy to install and manipulate, compact, and very eflicient and durable in use.

With these and other objects in view, there have been illustrated on the accompanying drawings several forms in which the invention may be conveniently embodied in practice.

In the drawings:

Fig. 1 is a front elevational view of the eyelet machine, showing the draw punches in their lowermost positions.

Fig. 2 is a right end view of the same.

Fig. 8 is a vertical sectional view of one of the draw punches and associated mechanisms, the view being taken along the line 33 of Fig. 1, looking in the direction of the arrows.

Fig. 4 is a fragmentary plan view of the bellcrank mechanism taken along the line 4-4 of 50 Fig. 3 with certain parts shown in section. Fig. 5 is a vertical sectional view through the blanking punch and associated mechanisms, the

view being taken along-the line 5-5 of Fig. 1, looking in the direction of the arrows.

Fig. 6 is a perspective view of one of the bell crank levers, showing associated parts in dotted outline. Fig. '7 is an enlarged vertical sectional view taken on the line 7-7 of Fig. 1 through the blank holding and knock-out mechanism of the 6 first draw punch.

Fig. 8 is a front elevational view of the same. Figs. 9 to 12 inclusive are views showing the relative positions of one of the draw punches and associated parts at'successive points in the cycle 66 of operation.

Fig. 13 is a side sectional view of a modified form of mechanism for producing the rest" in the upward motion of a draw punch.

Fig. 14 is a sectional-view, similar to Fig. 13 7 of another modified form of mechanism for the same purpose.

In former types of the so-called eyelet machines, the plungers carrying the draw punches were driven in both directions by means of cams engaging said plungers. One disadvantage of this type of eyelet machine was that-the cams wore out rapidly and required frequent adjustment and replacement. 7

Furthermore, owing to the fact that the cams 00 had only a line contact with the plungers, it was not possible to do heavy work, either in reduction of the thickness of the metal worked on by the punches, or in stamping, without so increasing the size of the cams and their engaging surfaces 86 as to make them prohibitive due to the expense.

The above and other disadvantages have been overcome in the present machine, in which the down or working stroke of the plunger is produced by means of a crank shaft and sliding gate 90 connected together by pitman rods, thus permitting much heavier work to be done. v

The plungers are frictionally and slidably mounted in the frame, and are driven down by the sliding gate, rather than by a cam. The nec- 9i essary rest period is produced in the up stroke by means of a bell-crank and cam-actuated mechanism.

In the present crank type of eyelet machine, the working part of the stroke, (that is,the 10% lower half of the downstroke) is actuated by the crank. The necessary rest period, or delayed action on the upward stroke, is obtained by the use of bell-crank levers which are pivoted on a single reciprocating crank-actuated gate memher. One arm of this bell-crank lever adapted to engage the punch carrying plunger, and the other arm engages a vertical stationary cam member. By means of this construction, it will be readily seen that if the cam-eneaaing arm of the bell-crank lever is in contact with a vertical surface of the cam parallel to the line of motion of the gate, then the plunger will have exactly the same motion as the gate. It will also be readily seen that when the cam-engaging arm of the bell-crank lever is in contact with an inclined portion of the cam, the motion of the plunger will be different from that of the gate, and the cam may be so constructed that a rest or delayed action in the movement of the plunger may be made to take place at any point of the upward stroke thereof. Referring now. to the drawings in which like reference numerals denote corresponding parts throughout the several views, the numeral 10 indicates the frame of the crank eyelet machine,

consisting of side walls 11 and 12 and an integral base 13. The base 13 is supported at its ends upon a pair of upper legs 14, which in turn rest on a pair of short lower feet 15. interposed between the legs 14 and the feet 15 isa shallow fiat pan 16 for catching oil and other drippings from the machine.

Power is supplied to vari us-mechanisms of 5 the machine by means of a main crank shaft 1'7 Strip feeding mechanism The metal strip 24, from which the blanks are punched, is fed into the machine from the front,

and first passes across the top of an oil-saturated pad of waste 25, contained within an oil-box 26,

which is preferably bolted to the front of a diebed 2'7, secured'to the top surface of the frame base 13.- During the passage of the metal strip 24 through the machine, it will be held down 5 against the top of the pad 25 by means of a small rod 28 detachably locked upon thetop of the oil-box 26, (see Fig. 1) whereby a small 'quantity of lubricating oil will be continuously supplied to the under surface of said strip. 24.

The strip 24 is drawn rearwardly through a groove formed'between a stripping plate. 29 and a blanking die 30, by means of a pair of feed rolls 31. The rolls are joumaled in a box 32 which is preferably bolted to the top of the frame 5 base 13, and said rolls 31 are adapted to bedriven by a ratchet mechanism 33, (see Fig. 2) located on the outside of the right-hand side wall 12.

The ratchet mechanism is oscillated by means of an upwardly extending rod ,34, adjustablys.

Blanking punch mechanism In oflier to pierce out a succession of blanks from the metal strip 24, the blanking die 30 and stripping plate 29, (see Fig. 5), are provided with an alining die hole 38 of a diameter predetermined by the size of the blanks to be cut from the metal strip. A blanking punch 39 is mounted on the lower extremity of a blanking plunger 40,

having a square guideshank 40a which is adapted to be vertically reciprocated in axial alinement with the die hole 38. Each time that the punch 39 passes down through the die hole 38, a blank 41 will be punched out of the strip 24 and forced into a pocket 42a formed within a transfer slide 42. The transfer slide 42 serves to progressively transfer the blanks to successive stations so that each of the punches of the machine may operate in succession upon the blank to form it into the desired shape.

As shown in Fig. 5, the squared shank 40a of the punch 40 has a sliding fit in a horizontal stationary plunger housing 43, attached to the front of a. cross-bar 44, preferably made inte- .gral with the side walls 11 and 12 of the machine. If desired, the cross-bar 44 may be re- 9% enforced by means of a heavy integral upwardly extending rib 45, which is preferably also made an integral part of the top cross member of the 'frame 10.

In order to cause reciprocation of the blank-. ing punch 40, said punch is connected to a vertical slide member 46 by means of adjustable capstan nuts 4'7. The member 46 is slidably fitted within a guide member-48, attached to the forward face of a movable main gate 49, as by screws 50. The function and operation of the gate 49 will be hereinafter more fully explained.

The upper part of the slide member 46 is rigidly secured to a small cam-operated gate member 51 which is adapted to reciprocate in a bearing bracket 52 bolted to the upper cross member of the frame 10. g

The plunger 40 is adapted to be depressed at the desired time for piercing out the blank 41 by the engagement of a cam 53 on the main crank shaft 1'7 with a roll '54 suitably journaled in the upper part of the slide member 46, as clearly shown in Fig. 5. In order to retract the plunger 40 from its lowermost position, provision is made of a pull-back cam 55, also mounted on 120 the crankshaft 17 at one side of the cam 53, said cam 55 being adapted to engage an upper roll 56, journaled in the end of an offset arm 5'7 formed integral with the body of the small camoperatedgate 51. It will be obvious from this construction, that when the cams 53 and55 are rotated, in the direction ofrt'he arrow in Fig. 5, the plunger 40 with its blanking punch 39 will be verticallyreciprocated. once for each rotation of the crank shaft 17, to pierce out a single blank 41 from theintermittently moving strip 24.

Transfer slide mechanism The slide 42 for transferring the blanksprogressively through the machine is similar in construction and operation to the transfer slide 41 disclosed in the patent to Pierson et al, No.

1,725,300. As clearly shown in Figs. 1 and 3, the slide 42 is adapted to reciprocate in'the die-bed 27 directly above, and in alinement with a series of spaced 'die'blocks ,58, detachably secured as 2'7. The slide 42 is driven by a reciprocating plate 60, shown at the right offFig. 1, to which it is coupled by a bolt 61. A reciprocatory motion is imparted to-the slide 60 by a rotating horizontal cam 62, locatedbetween apair ofv rolls 63 Journaled on upstanding pins secured-to by screws 59 in recesses formed in said die-bed I 1,952,195 shaft 64, which is journaled in a pair of upper and lower brackets 65 and 66, extending laterally from the machine frame 10. 'The shaft 64 carries on its upper end a keyed horizontal bevel gear 67, which meshes with a vertical bevel gear 68 secured to the outer end of the crank shaft 17, as shown in Fig. 1. The reciprocating plate 60 is guided by a recessed frame 69, mounted on the top surface of the lower bracket 66. As will be understood, after each blank 41 has been pierced out of the strip 24, the transfer slide 42 will progressively advance it from itsoriginal position to a plurality of stations in alinement with a series of drawing or forming punches 70,

(four in this instance), carried on the end of the same number of plungers 71. The blank will be held stationary in each of said stations and subjected to the desired successive drawing and forming operations, until it finally emerges as a complete article from the machine through a discharge tube 72, (see Fig. 1).

Drawing plunger mechanism' While four drawing plungers 71 have been herein shown, it will be understood that a greater or smaller number of such plungers may be employed as is desired within the spirit and scope of the invention. Since all the drawing plungers 71 are identical in construction, only one of them will be herein described in detail, reference being made particularly to Fig. 3, where said plunger 71 is shown at the bottom of its downward stroke. Each plunger 71 is provided with a square intermediate guide shank 71a, similar to the shank 40a of. the blanking plunger 40 (see Fig. 5). The plunger 71 has a free fit within the plunger housing 43, and is frictionally held therein by means of a pair of oppositely opposed angular friction shoes 73 resiliently pressed inwardly against the opposite sides of the square shank 71a. The friction of the shoes 73 against the shank 71a is adjusted to such a degree that the plunger 71 and its various attachments will remain. at any position in its cycle of movement. The upper end of the plunger 71 is provided with a threaded section 7112, above which is an unthreaded reduced section 710, having a sliding lit in a bushing 74 secured within a plunger bar 75. The plunger bar 75 is fastened rigidly to-the upper front face of the main gate 49 previously referred to, and also has a pivotal connection with a pair of pitman rods 76 which connect said bar 75 to the main crank shaft 17. By means of this construction, it will be obvious that rotation of the crank shaft 17 will cause the plunger bar 75 and the attached gate 49 to reciprocate and operate the draw punches 71. a l

In order to provide suitable guiding means for the gate 49, provision is made of a pair of vertical guide shafts 77, rigidly secured at opposite ends of said gate, (see Fig. 1) 77 are slidably journaled within a pair of bearing boxes 78 attached to the upper part of the frame 10, and within a pair of bearing boxes 79 secured within the crossbar'44 of said frame 10, (see Figs. 1 and 3).

The plunger bar 75 is provided on its lower section with an abutment sleeve plug 80, surrounding the reduced section 710 of the plunger '71, said plug 80 being adaptedtostrike against a pair of adjustable nuts 81 on the threadedsectionsfllb of the plunger 71, for transmitting power during the down stroke, and causing the attached punch 70 to engage the blank 41 therebeneath, and force Theguide shafts it into a forming or drawing die 82 within the die-block 58. 1

It is to be noted at this point, that the plunger bar 75 exerts only a downward force on the plungers 71, and is free to rise independently of said plungers 71, which, as stated above, will be held against the force of gravity by the friction shoes 73.

In order to raise the plunger 71 at the proper time, to remove the punch 70 from the die 82, provision is made of a plurality of bell-crank levers 83, one for each plunger, pivoted on short stud shafts 84. Each bell-crank lever 83 has a forwardly extending bifurcated arm adapted to straddle the body of the plunger 71, (see Figs. 3, 4 and 6). The stud shaft 84 is supported by means of a plurality of brackets 86, depending from the underside of the reciprocating gate 49.

Each bifurcated arm 85 is provided with a pair of anti-friction rolls 87, having outer flanges 87a journaled therein, in such a manner that the top portions of said rolls 87 will extend slightly above the top surfaceof said arm 85 for engaging the underside of a collar nut 88, adjustably locked in place on the threaded section 71b of the plunger 71. As shown in Fig. 4, there are two bell-cranks 83 pivoted on each stud shaft 84, and there may be any numberof such sets of bellcranks supported underneath the gate 49. The outer flanges 87a of the rolls 87 are adapted to prevent the rolls 87 from being laterally displaced from their respective sockets.

As is customaryin eyelet machines, it is necessary to provide a rest period or dwell in the upward stroke of the drawing plungers 71 to permit the gripping fingersinot shown) of the transfer slide 42 to engage the blanks 41 to carry them to the next operatingstation. In the present invention, the above-mentioned rest period is obtained by means of a stationary substantially vertical cam plate 89 mounted on the frame of the machine. ward face 90 adapted to engage a lateral roll 91 journaled on the lower arm of the bell-crank lever 83. As will-be clear from Fig. 3, the cam face 90 is provided with two vertical straight surfaces and an intermediate surface inclined rearwardly at an angle of approximately 45 degrees.

In the operation of each bell-crank lever 83, it

can be readily seen that if the roll 91 engages with the vertical surfaces of the cam plate 89, which surfaces are parallel to the line of motion of the'gate' 49, the plunger 71 will have exactly the samerate of motion as said gate, and' any stripping action on the plungers 71, or any other stress tending to pull the plunger down, such as the friction of the shoes 73, will be transmitted.

The cam plate 89 has a for The cam plates 89 are adjustably secured to the cross-bar 44 of the frame 10 in the following manner. Eachcamplate 89 is constructed with a rear dove-tail section 91a adapted to fit within a corresponding angular groove 92, cut vertically in the front face of the cross-bar 44.

As shown in,Figs. 3 and 4, each pair of cam plates 89 are locked to the cross-bar 44 in tanthe drawing punch 70 when the plunger 71 moves wedge -shaped head 94a engaging the inner sides of the dove-tail sections 91a. By means of this construction, it will be seen that by drawing the nuts 95 against the cross-bar 44, the head 94a will Stripping and knock out mechanism In order to positively strip the blank 41 from upwardly subsequent to'the rest period, provision is made of a stripper sleeve or thimble 96,

' pivotally supported in the forward bifurcated end "a rotating lifter cam 109, keyed upon a rotating 97 of a stripper lever 98', (see Fig. 3) {said sleeve being slidably fitted over the punch 70. The stripper lever 98 is fulcrumed upon a horizontal shaft 99, carried by the frame 10 much in the manner of a walking beam", and said lever 98 is urged to rotate in a clockwise direction by means of a heavy inclined coil spring 100, one

end of which is attached to the rear extremity of said lever 98, and the other end is fastened to the bed 13 of the frame 10 lfy a screw hook 101 The lever 98 is limited in its clockwise rotation by means of a set screw 102 adjustably attached to the underside of the plunger housing 43, said screw being adapted to engage a hardened plug, 103, located in the upper edge of the stripper lever 98 at the forward end thereof. Obviously, as the plunger completes its upward stroke, the punch 70 will be drawn up through the thimble 96, causing the blank '41 to be stripped off from the punch 70. v

To" prevent the blank 41 from sticking in the die 82, provision is made of a knock-out plug 104 which is caused to rise through. the die 82 in synchronism with the movement of the ascending plunger 71 and force the blank 41 out of said die 82. To causethe plug 104 to be lifted at the proper moment, said plug is located in alinement with a vertical lifter rod 105, slidably fitted in a vertical hole 106111 the frame base 13. As shown in Fig. 3, the lifter rod 105 is held frictionally by means of a horizontal spring-pressed rod 107 pressing against a flattened surface 105a formed on said rod 105.

The lower end of the lifter rod 105 is adapted to abut against an elongated wiper lever 108, the forward arm of which is engaged by the face of cam shaft 110.- The lever 108 is fulcrumed at its rear end in a hanger bracket 111, attached to the underside of the base'13, and said lever 108 is counter-balanced by a weight 112, attached thereto near its fulcrum point as by screws 113,

' and extending rearwardly therefrom. The coun- Blank holding mechanism -;-Whenthe,blank 41 is transferred from its first station or blanking position to the second station or' first drawing position, it will generally, but

' dem, by means of a clamping bolt 94, having a not necessarily, be in the form of a circular disc.

For the purpose of preventing the formation of a wrinkled or puckered-up fiange during the first drawing'operation, the edge portion of the blank 41 is firmly helddown against the top surface of the die'116, while the blankis being cupped. This is accomplished by an apertured holding sleeve 115, surrounding the first drawing punch 70, said sleeve being adapted to firmly hold the outer edge of the disc blank 41 against the top annular surface of a cupping die 116, (see Fig. 7) The holding sleeve 115 is shouldered-and adapted to fit within a horizontal sleeve plate 117, the ends of which are detachably secured to the upper shouldered ends of a pair of connecting links 118 and 119.

As shown in Fig. 7, the links 118 and 119 are adapted to straddle the die-bed 27, and are pivotally connected at their lower ends to a pair of knuckle blocks 120 and 121. This construction permits the links 118 and 119 to be readily swung to the sides to provide access to the die blocks 58. The knuckle blocks in turn have threaded engagement with the upper ends of a pair of vertical connecting rods 122 and 123, which are 'rigidlyattached at their lower extremities to the outer. ends of a horizontal adjusting plate 124, similar to thesleeve plate 117.

It will be noted that the front knuckle block .120 has a sliding fit within a groove 125', vertically cut into the face of the frame base 13, and is held in said groove 125 by means of a cap member 126.

In order to provide the proper clamping pressure on the blank disc 41 between the adjacent faces of the holding sleeve 115 and cupping die 116, the adjusting plate 124 is connected, as by a pair of opposed nuts 127, to a short intermediate stud screw 128, depending from a horizontal vertically reciprocating slide 129. The slide 129 has a forwardly offset arm 130 to which are journaled a pair of opposed rolls 131, (see Figs. 7 and 8), which lie beneath and in contact with a pair way 133,- provided in the face ofa supporting bracket 134, attached to the underside of the base 13. The slide 129 is frictionally held in the guide-way 133 by means of a friction plate 135 forced inwardly against the side of said slide, by a pair of rectangular plates 136 pressed by a pair of helical springs 137 held in place by the heads of a pair of collar screws 138, (see Fig; 8). Each of the rectangular plates 136 is connected with the friction plate 135 by means of a pair of pins 139 slidably fitted in the sidewall of the guideway133. The pressure on the friction plate 135 may thus be readily varied by manipulation of the collar. screws 138.

In order to release the holding sleeve 115 from its clamping position and lift it to its uppermost position, provision is made of a lifter cam 140 mounted on the cam shaft 110 between the pair of cams 132. The earn 140 is adapted to contact with the underside of a wiper lever 141 which is pivoted at its rear end to a pair of lugs 142, forming an integral part of the slide 129. The forward end of the lever 1411s pivotally connected to the upper end of a depending adjustable tie rod 143 by means of a pivot pin 144. The lower end of the tie rod 143 has a loose fit in the forward end of the slide arm 130,- and said tie rod 143 is adjustably clamped to said forward end by means of a pair of opposed washers 146 and nuts 147. The washers 146 are adapted to bear against a pair of opposed cylindrical surfaces 145 on said arm 130, whereby a sufficient amount of rocking motion is provided to compensate for the angle through whichthe upperend of,the rod 143 is moved by reason of its connection with the oscillating end of the lever 141.

The upper side of the wiper lever 141 is provided with a convex section 141a for engagement with a lifter rod 148 which fits in a vertical hole 149 in the frame base 13. The upper end of the rod 148 is in alineme'nt with a short knock-out pin 150, slidably vfitted within the die block 58 and provided with an enlarged head 151 for fitting the lower end of the cupping die 116.

By means of this construction, it will be evident that after the holding sleeve 115 has been lowered by the cams 132 to clamp it against the blank 41 during the cupping operation, the cam 140 will immediately come intoaction to lift the wiper lever 141 upwardly. This motion will simultaneously raise the holding sleeve 115 and the knock-out pin 150 to lift the cupped blank 141 out of the die and into alinement with the transfer slide 42.

The lower horizontal cam shaft 110 is suitably journaled at its opposite ends in a pair of hanger bearings 152 and 153 connected'to the underside of the frame base 13, and said shaft is rotated by means of a pair of intermeshing bevel gears vertical side shaft 64, (see Fig. 1).

Operation with the die 30, pierce a blank 41 from the strip 24 during one of its stationary or rest periods. The blank 41 will then be pushed into a receiving pocket 42a. in the transfer slide 42. The stripper plate 29 will prevent the metal strip 24 from being pulled upwardly with the plunger 40 as the latter ascends.

After the blanking punch 39 has risen out of the way, the transfer slide 42 will be moved to the left, as shown in Fig. 1, carrying the blank 41 into alinement with the first drawing punch 70.

The holding sleeve 115 will then descend to clamp the edges of the blank 41 tightly against the top face of the cuppingdie 116, (see Fig. 7). The gate 49 will then descend, carrying the punch 70 downwardly into the cupping die 116 to form a smooth flanged cupped shell 156 from the original fiat blank 41. During this cupping operation the transfer slide 42 will automatically .be returned to its original right-hand position, as the gate 49 next ascends carrying the plunger 71 with it. During the succeeding movement of the transfer slide to the left, the cuppedshell 156 will be carried to the next or third station below the next punch 70 in the series, where said shellwill be subjected to another draw-ing operation.

These operationswill be continued until the shell has been formed into the completed article which is finally delivered from the machine Cycle of operations A complete cycle of operations of one of the plungers 71 will now be described, reference being hadto Figs. 9 to 12 inclusive. Beginning at the top of the stroke (see Fig. 11), and assuming that the work being done 'is not the maximum allowable,-in other words, that there is backlash between the pull-back mechanismand the gate, the operation would be as follows: The

first part of the down stroke of the gate 49 will merely take up the back-lash between the attached plunger bar 75 and the plunger 71, this 4 distance being represented by X in Fig. 11. During the last part of the down stroke, the plunger 71 will be pushed down by the plunger bar 75, acting through the adjustable nuts 81 on the threaded section of said plunger, (see Fig. 12) At the bottom of the stroke (see Fig. 9), there will the arms of the bell-crank 83 and the inclination of the cam surface is such that for all practical purposes, a definite rest period is obtained for the plungers 71, during each period of operation of the transfer slide '42. During the latter part of the upward stroke of the gate 49, the roll 91 will engage the second vertical section of the stationary cam 89, and the plunger 71 will again have the same upward motion as the gate 49. It will thus be seen that in all cases, the movement of the plunger will be less than that of the gate, while 'the two sets of adjustable nuts 81 and 88 will allow the same flexibility of operations as is obtained on any standard eyelet machine."

Modified forms In the'modified form of the invention shown in Fig./ 13, the construction is substantially the same as that illustrated in the previous figures, except that the rest period in the upward stroke of the plunger 71 is effected by a rotating earn 157 instead of a stationary cam. The roll 91 on the lower end of the bell-crank 83 runs in a vertical slot 158 formed in a horizontally reciprocating guide member 159. The. guide member 159 is slidably supported in a stationary bracket or.

hearing 160, having suitable connection to the machine frame 10. The opposite end of the guide member 159 is provided with a follower roll 161 engaging in agroove 162 out in the face of a rotating face card 157. The cam motion is such that at the proper time, the guide member 159 will be reciprocated rearwardly to cause the bellcrank 83' to swing about its fulcrum and produce the necessary "dwell period for the plunger '71v without interrupting the upward stroke of the gate 49. f

. In Fig. 14, a still further modified form of mechanism for producing a rest; or-dwell in the motion of the plunger 71 is illustrated.. In this form, provision is made of a cam shaft 164, journaled in a bearing bracket 165, forming an integral part of the vertically reciprocating gate 49, and said shaft 164 carries with it a rotating cam 166 adapted to engagea follower roll 18% journaled to one "end of a bell-crank lever 168. The bell-crank lever 168 is likewise connected to the gate 49 by a bracket 170 and is adapted to travel with it. The shape of the cam 166 is such that a continuous rotary motion given to the cam 166 will produce the proper rest period in the movement of the plunger 71 during the upward stroke of the gate 49. 7 v

It will be understood that it is within the scope of this present invention to employ various other mechanisms for producing proper rest" or dwell periods in the upward movement of the plunger, beside those forms herein illustrated,

While there have been disclosed in this specification three forms in which the invention may be embodied, it is to be understood that these forms arev shown for the'purpose of illustration only, and that the invention is not to be limited to the specific disclosures, but may, be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following'claims. Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent is:

1. In an eyelet machine, a frame, a die-carrying bed supported by said frame, ,a gate mounted to reciprocate in said frame, a plurality of plungers slidable in said frame, a crank shaft for driv ing said gate, means for causing said gate to engage said plungers in its down stroke, and means ing said gate, means for causing said gate to en gage said plungers in its down stroke, and camoperated means connected to said gate for causing said gate to raise said plungers during the up stroke ofsaid gate .with a delayed action.

3. In-an eyelet machine, a frame, a plurality of plungers slidably supported in said frame, a reciprocating gate slidable in said frame, a powerdriven crank shaft, pitman links connecting said crank shaft with said gate, means on said gate for'engaging said plungers in their down stroke, a plurality of bell-cranks fulcrumed on said gate, and means to cause said bell-cranks to raise said plungers with a different motion from that of said gate.

4. In an eyelet machine, a frame, a plurality of plungers frictionally mounted in said frame, a gate adapted to reciprocate in said frame, a power driven crank-shaft, pitman links connected to said crank-shaft for operating said gate, a plunger bar connected to said gate and slidably fitted upon said plungers, said plunger bar engaging said plungers for forcing them downwardly with the down stroke of said gate, a plurality of bell-crank levers fulcrumed to said gate, one arm of each bell-crank lever being adjustably connected with said plungers, the otherarm of said lever being engaged by a cam for raising said plunger independently of the motion of-said gate to permit a dwell period in theupstroke of said plungers. 1

5. In an eyelet machine, a frame, a plurality of plungers frictionally mounted in said frame, a

gate adapted to reciprocate in said frame, a power driven crank-shaft," pitman links connected to said crank-"shaft for operating said gate, a

plunger connected to said gate and slidably fitted upon said plungers, said plunger bar engaging said plungers for forcing them downwardly with the down stroke of said'sate, a plurali y of bell-crank levers fulcrumed to said gate, one arm of each bell-crank lever being connected with said plungers, the other arm of said lever being engaged by a cam for raising said plungers independently of the motion of said gate 'to permit a dwell" period in the upstroke of said plungers.

6. In an eyelet machine, a frame, a plurality of plungers frictionally mounted in said frame, a gate adapted to reciprocate in said frame, a power driven crank-shaft, pitman links connected to said crank-shaft for operating said gate, a plunger bar connected to said gate and 'slidably fitted upon said plungers, said plunger bar engaging said plungers for forcing them downwardly with the down stroke of said gate, a plurality of bell-crank levers fulcrumed to said gate, one arm of each bell-crank leverbeing adjustably connected with said plungers, the other arm of said lever being'engaged' by a cam for raising said plunger independently of the motion of said gate to permit a delayed action in the upstroke of said plungers.

7; Inan eyelet machine, a frame, a reciproeating plunger carrying a drawing punch, a die carried by said frame for cupping a blank disc, a holding sleeve surrounding said punch, a sleeve holding member connected to said sleeve for movingsaid sleeve down toward said cupping die and clamping the edges of said disc against the top face of said cupping die.

8. In an eyelet machine, a frame, a reciprocating plunger carrying a drawing punch,'a die 1 carried by said frame for cupping a blank disc, a

holding sleeve f 1' said disc having its axis in axial' alinement wi ing said sleeve tightly against said blank disc during the cupping operation, means to cause said sleeve to bereleased after the cupping operation, and means subsequently forcing said cupped disc out of said die. 9. In an eyelet machine, a frame, a recipro cating punch carrying plunger slidable in said frame, a blank cupping die carried by said frame, a holding sleeve surrounding said punch, a sleeve holding member, and cam-operated means for pulling said holding sleevedownwardly for clamp ing said blank against said cupping die prior to ing sleeve slidable onfsaid punch, a transverse,

sleeve plate having shouldered engagement with said sleeve, a pair of connecting links depending said punch, means for clamplift from-saidIsleeve-plate and slidable in said frame,

and cam-operated means connected withthe lower ends of said'li'nks for urging said holding sleeve downwardly to clamp the blank disc against said die during thecupping operation.

11. In an eyelet machine, a frame, a reciproeating plunger carrying a drawing punch, a. die

carried by said frame for cooperating with said connected to their lower portions and detachably connected to said sleeve plate, said upper portions. being capable of being swung downwardly out of the way to permit the removal of said die. 12. In an eyelet machine, a frame, a power driven crank-shaft mounted in said frame, a punch-carrying plunger slidable in said frame, a reciprocating gate slidable in said frame and driven by said crankshaft, a bell-crank lever fulcrumed on said gate, one am of said lever adapted to contact with a cam, and the other arm of said lever being adapted to engage said plunger and raise it with a different motion from that of said gate.

13. In an eyelet machine, a frame, a power driven crank-shaft mounted in said frame, a punch-carrying plunger slidable in-said frame, a reciprocating gate slidable in said frame and driven by said crank shaft, a bell-crank lever fulcrumed on said gate, one arm of said lever engaging with said plunger, a cam actuated slide for controlling the other arm of said lever to cause said plunger to lag in its upstroke behind said gate to permit the proper operation of the transfer mechanism.

14. In an eyelet machine, a frame, a power driven crank-shaftjournaled in saidirame, a blanking plunger slidable in said frame and having cam-connection with said crank shaft fer both its upstroke and its downstroke, a draw plunger slidable in said frame, a gate connected to a crank on said crank shaft, means to cause said gate to engage said draw plunger on its downstroke to operate a draw" punch, and power driven means for raising said draw-plunger independently of said gate.

15. In an eyelet machine, a frame,- a power.

having cam-connection with said crank-shaft for both its upstroke and its downstroke, a draw plunger slidable in said frame, a gate connected to a crank on said crank-shaft, means to cause said gate to engage said draw plunger on its downstroke to operate a draw punch and cam-controlled power driven means for causing said gate to raise said draw plunger independent of said gate.

driven crank-shaft mounted in said frame, a punch carrying plunger slidable in said frame, a reciprocating gate slidable in said frame and driven by said crank-shaft, and power driven means for raising said plunger independently of said gate, a

17.; In an eyelet machine, a frame, a power driven crank-shaft mounted in said frame, a punch carrying plunger slidable in said frame, a reciprocating gate slidable in said frame and driven by said crank-shaft," an adjustable stationary cam, a bell-crank lever i'ulcrumecl on said gate, one arm of said lever engaging said cam, and the other arm of said lever serving to raise said plunger with a delayed action during the upstroke of said gate,

1am an eyelet machine, a frame a power driven crank-shaft mounted in said frame, a punch carrying plunger slidable in said frame, a reciprocating gate slidable in said frame and driven by said crank-shaft, a rotating cam jourlt In an eyelet machine, a frame, a power naled on said gate, a bell-crank lever fulcrumed on said gate, one arm 01' said lever engaging said cam, and the other arm or said lever serving te raise said plunger with a delayed action during the upstroke of said gate.

ZENAS P. CANDEE,

q JESSE B. BURTON.

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