US2293339A - Stencil machine - Google Patents

Description

Aug 18, 1942; H. w. HEMPEL ET AL STENCIL MACHINE File d June 3, 1939 6 Sheets-Sheet l w R N E A 0 M r /w r N C i MW W M w Aug. 18, 1942. H. w. HEMPEL ET AL 2,293,339

STENCIL MACHINE Filed June 3,1959 6 Sheets-Sheet 2 VTTORMEK Aug. 18,1942. H.W.HEMPEL m1. 7 2,293 339 STENCIL MACHINE Filed Julie 3, 1939 6 Sheets-Sheet 3 /A//-wro ?s." .r/s/vaeer W. f/EMPEL, WALTON a. wines/4 0210M Q.

Aug. 18, 1942. H. W.-HEMP EL ET-AL STENC IL MACHINE Filed June 3, 1939 6 Sheets-Sheet 4 QQ Q Q Q Q R VIII/Ill!!! xxx H. W. HEMPEL ETAL zgls, 1942.

STENCIL MACHINE Filed June 5, 1939 v m? 5 A E. t & M w x wrc m. 3Q s 57 a Z S m\ 1 a w 1 V 5 FI IIIE. I

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m/amen s- 18,194 H. w. HEMPEL ETAL 2,293,339

STENCIL MACHINE Filed June 3, 1939 6 Sheets-Sheet 6 Patented Aug. 18, 1942 OFFICE STENCIL MACHINE Herbert W. Hempel and Walton C. Marsh, Belleville, Ill.

Application June 3, 1939, Serial No. 277,151

10 Claims. (01. 197-6.7)

The present invention comprehends a stencil cutting machine. In machines of this kind, there is provided a series of punches and dies representing letters or other characters desired, and they are located on a carrier so that the ones used may be selectively brought into position of cutting. Locking mechanism, automatically operable, holds the carrier during cutting. A work feed, automatically operable with operation of the punches, advanced the work through the machine for successive cuttings. Presser means clamp the work during the cutting.

Objects of the present invention are to provide a stencil machine having a bed and a carrier rotatably mounted thereon, with a lubricating system requiring a minimum of attention and providing a maximum of efiiciency; and with punches operated eccentrically of the shaft but with a bed and hood designed to distribute the eccentric load to attain a minimum of strain there- Other objects include the provision of an operating handle and a linkage so arranged that several operations including centering and feeding are performed on the same stroke as is the cutting operation, to avoid partial spacing with consequent crowding or overlapping of letters; and the further provision for a greater power in the linkage during the cutting than during the other operations by the handle so that the movement of the handle may be short, and attendant greater speed during the other operations.

Other objects include the provision of readily accessible stop means cooperating with the handie to aid in spacing without cutting; and pro.- vision of a feed mechanism that may be conveniently adjusted for alignment, that distributes the clamping pressureon the work for maximum efficiency, and that may be adjusted as to pressure applied; and also the provision of a convenient latchable mechanism for withdrawing the presser rolls, and a release therefor.

In the drawings:

Fig. 1 is a plan view, partly broken away, of the machine;

Fig. 2 is a front elevation of the machine with the closure plate removed;

Fig. 3 is a bottom view;

Fig. 4 is a front-to-rear vertical section taken on the line 4-4 of Fig. 1;

Fig. 5 is a vertical transverse section taken on the line 55 of Fig. 3; v

Fig. 6 is a sectional view on the line 66 of Fig. 3 transverse to Fig. 5;

Fig. '7 is a horizontal section of the elevation adjustments for the roller supports taken on the line 1-1 of Fig. 5;

Fig. 8 is a transverse vertical section on the line 8-8 of Fig. 3;

Fig. 9 is a horizontal section showing a clip adjustment for one of the punch springs and taken on the line 99 at the extreme right of Fig. 4; p

. Fig. 10 is a partial View similar to Fig. 2 but with the punch depressed;

Fig. 11 is a vertical section through the punch pressing and feed mechanism taken on the line 'll|| of Fig.2; V Fig. 121s a section on the line I2- -l 2,.immedi-' ately left of the center, of Fig. 2 showing the feeder cam in section; Fig. 13 is a horizontal section on the line I3-l3 ofFig. 2 showing the punch pressing mechanism and the centering mechanism both in retracted position;

Fig. 14. is a View similar to apart of Fig. 13 with the centering mechanism in active position;

Fig. 15 is a vertical longitudinal section similar to the left hand portion of Fig. 4 but with the punch depressed; I

Fig. 16 is a transverse section of the front of the mechanism taken on the line l6lii of Fig. 13, showing the punch press linkage in retracted position; v Fig. 17 is a View similar to Fig. 16 but with the mechanism in active position;

Fig. 18 is an edge view of the centering mechanism actuating cam;

Fig. 19 is an edge view of a stripper plate and guard;

Fig. 20 is a horizontal section of the stripper plate and guard taken on the line 20-20 of Fig. 19;

Fig. 21 is a sideelevation of the punch plunger assembly; I

.Fig; 22 is a rear view thereof; and, Fig. 23 is a view of the stencil sheet with cuts therein, such as are made by this machine.

The machine includes a base or bed 30 that has a portion 3| extending out of the front thereof and a rear circular portion 32. Centrally ofthe circular portion there is a journal box 33 supported by beams from the outer ring 32. The beams include two, 34 and 35, the direction of which followslines drawn from the outer ring 32 at the center of the front to two points spaced approximately apart at the rear. The two beams 34 and 35 terminate at a transverse beam 36 toward the front of the mechanism; and from the junctions therewith of the beams 34 and 35 extend outwardly beams 31 and 38 that terminate at the outer ring 32. The ring is flattened at 39 across the front. At the front and rear of the journal box 32 transverse beams 49 and 4| connect the two beams 34 and 35. From the opposite junctions of the beam M with the beams 34 and 35 there extend the beams 42 and 43 terminating approximately diametrically opposite on the ring 32. The foregoing arrangement of beams and their shapes, as indicated, are such as to give a proper distribution of forces, since it will be realized that the punchpressure is off center and takes place within the area between the beams 35, 31, 38 and 39. The first three of the last named beams have integrally formed therewith a web 44 that has an abutment screw 45 threaded therein for a purpose to be described.

The front portion of the base is suitably webbed as will appear. About the base there are provided a number of feet 46 on which the machine rests, and a number of bosses 41 to receive hood screws to be described.

The journal box 33 is drilled to receive a central shaft 59. It also has an annular pocket 5! surrounding the shaft in which is mounted a felt oil pad 52, and surrounding the pocket 5I is an annular bearing surface 53. The center shaft 59 is pressed into the journal box 33 and is not rotatable with respect thereto.

A die carrier 56 has a long central tubular column 5! journaled on the center shaft 59, and bearing at its bottom on the annular surface 53. A plurality of radial arms 59 extend outwardly from the bottom of the center column to a die supporting ring 69 (Fig. 3). About the ring are a series of spaced screw-receiving openings BI receiving screws 62 that hold dies 63 in place on the ring at a radial distance suflicient to permit them to be brought over the punch area of the bed 30. the uniformity of the screw holes.

Emanating from the central column 57 is a, table 66 to which is bolted an annular punch carrier 61. At its outer edge this punch carrier rises upwardly to provide an upper flange 68 opposite a lower flange 69 which flanges provide for the guiding of the punches.

Each punch includes a punch shank I slidably mounted in spaced openings in the flanges 68 and 69. At its upper part, each shank has a plunger-receiving neck II, and between the two flanges an additional neck I2 to receive a spring clip 13 of the shape shown in Fig. 9. About the shank there is also a coil spring 14 of the compressions type acting between the flange 99 and the clip I2, urging the punch upwardly.

On each shank I0, beneath the flange 69, there is a punch-supporting plate I having a vertically bent tongue I6 guided within a hole TI in the punch carrier. This latter action prevents rocking of the punch during the pressing action. Each punch I8 is mounted on a punch plate I9 secured to the plate I5.

As is evident, there are a series of punches and dies corresponding to the desired letters, numbers, and the like. Each punch has its corresponding die mounted beneath it on the ring 60 and, as will be shown, any pair may be selectively located in cutting position.

Secured to the top of the column 5'! there is a depending portion 82 of a circular operating hand wheel 83. The operating hand wheel has an index pointer 84 attached thereto and which cooperates with a dial plate 85 mounted on a hub The dies are interchangeable because of 86, which hub is adjustably secured as at 81 to the center shaft 59. The dial is so arranged that when the pointer 94 is brought to any character on the dial, the punch and die of that character will be located in cutting position.

The dial has an oil hole therein immediately above an oil groove 9! in the center shaft. This groove extends down to a point well below the top of the center column 51. When oil is dropped through the hole 99 and into the groove 9I it will lubricate the entire bearing and finally the surplus Will descend to reach the felt pad 5| wherein it is stored to provide lubrication for an indefinite period, of the bearing 53.

Over the entire top of the machine is a hood or cover 94 through which the hand wheel hub passes. There are suitable bosses 95 on the side edges of the cover to receive screws 95 by means of which the cover is secured to the fastening lugs 41 of the base.

On the front of the machine is the punch centering and actuating means and a paper feeding means which will now be described. The cover 94 has a housing 8'5 on the front thereof, in which a large part of the said mechanism is mounted. This housing includes a main wall 98 and a front wall 99, the latter having an opening I00 normally closed by a closure plate (not shown).

The wall 99 carries the load applied to the handle, and hence the reaction of which the punching force is the action. The shape of the hood, including its heavy side walls, and the front-to-back ridge extending along its top, make it substantially rigid so as to minimize deflections by said reactions.

In the wall 98 there is an opening I02 shaped something like a dumbbell with enlargements at the top and the bottom joined by a narrower connecting portion. This connecting portion has opposed vertical grooves I93 in its edges that receive guides I94 on the opposite sides of a punch actuating plunger, generally indicated at I05. This plunger has a notch I96, somewhat wider than the vertical thickness of the head of the punch shanks, providing a surface I9! for depressing the punches and an edge I98 for ensuring their withdrawal. As is evident from Fig. 4, when any punch is brought to actuating position, its head engages in the notch I06 of the plunger.

The plunger has at its top a pivot pin H9 including a spacing shoulder III, the latter being sufficient to carry the pivot to the front of the wall 98 as appears in Fig. 15.

A limiting screw II2 having a lock nut II3 thereon is adjustable to determine the upper limit of movement of the plunger I95, to insure that the plunger will be in proper position to en gage over the punch shank heads.

A link plate II5 of the bell crank type has a slot IIG engaging over the pivot III]. The plate in turn is pivotally mounted to the wall 98 on a bushing I I I held by a screw I I8.

On the other angle of the link plate I I5, there is pivoted at II9 a link I29, the other end of which is pivoted at I2I to a combination link and cam plate I22. This latter plate I22 is pinned at I23 to rotate to the hub I24 of a handle member I25.

The pivot IZI receives one end of a return coil spring I29, the other end of which is attached at I27 to the wall 98. This is a tension spring that normally pulls the link I29 to the right in Figs. 2, l0, l6 and 17, and with it the associated mechanism, such movement returning the punch to its retracted position.

The plate I22 also has a cam edge I28 engageable with a roller I29 located in the middle-of a link I39 pivoted at its upper end to the wall 98 on a screw I3I. This link is shown separately in Fig. 18. Its lower end engages a screw I32-adjustably projecting from the outer end of a horizontal lever I33 :pivoted at I34 to a boss I35 projecting from the back of the wall 98. The inner end of the lever I33 has a roller I35 engageable between adjacent punch shanks to center and hold immovable the punch carriage in such position that the actuated punch is in exact alignment at the cutting portion of the machine. A coil spring I31 is fastened between the inner end of the lever and the front wall 99 to maintain the centering lever normally in inactive position.

The handle I 25 and the plate I 22 are mounted on a shaft I38 passing through the wall 98 and secured thereto by a nut (Fig. 11). A washer I 99 secured to the shaft by a screw prevents the hub I24 from coming off of the shaft.

It is quite evident that during the first and 'major part of the movement of the handle I25,

the punch, although moving down, is above the work and consequently is not cutting. However, as will be shown, the work feed mechanism is in operation during such interval. This work feed mechanism is operated off the pivot II9 between the link plate I I 5 and the link I29. Fig. 12 shows this pivot H9 in detail. On its outer end it has a roller I40 held by a nut I4I, the nut engaging on a shoulder to allow free rotation of the roller.

, This roller rides on a cam link I42 that is pivoted -at I43 to the wall 98, but spaced therefrom by a spacer member I44. This cam link I42 has a bell crank I45 pivoted at I46 to its other end. A tension spring I41 acts on one end of the bell crank lever I45 and is also attached to a pin I48 (Fig. 15) extending from the wall 99. The spring I41 keeps the bell crank lever I45 in a clockwise direction, viewed from the front of the machine.

The other end of the bell crank lever has a ratchet dog I50 (Fig. 15) engaging with the teeth of a ratchet wheel I5I that is mounted to rotate with a serrated feed roller I52 that is attached to the lowest end of the wall 98. A light leaf spring I53 (Fig. 17 is secured to the wall 98 and ,bears against the back surface of the feed roller I52 to prevent its coasting.

The cam link I42 has a cam edge I54 thereon that is engaged by the roller I49. By this means when the crank I25 is depressed the link I20 moves to the left and with it the roller I49; and the latter acting upon the cam edge I54 pivots the cam lever I42 clockwise moving the bell crank lever I45 downwardly so that its dog I50, maintained in engagement with the teeth of the ratchet I5I by means of the spring I41, rotates the ratchet wheel a given angular distance clockwise, and with it rotates the feed wheel I52. This angular distance is equal to the distance between the characters.

After the cam roller I40 is moved over the hump of the cam edge I54, addition-a1 movement of the link I20 and the roller I49 about the pivot I'I1 produces no additional movement of the feed roll. The cam is designed so that all of the feeding takes place during the first approximately of the lowering of the punch and before the actual cutting operation takes place.

Where it is desired to limit the action merely to feeding and not to punching, this can be attained by pressing inwardly a button I58 on the handle I25, which button is attached to a pin I51 having a head I58. A spring I59 normally maintains the pin and the head I55 in their outward positions. When the button is pressed, however, the pin I58 moves out back of the handle I28 in position to engage a knob I60 that is formed as a boss on the front wall 99 of the hood. By the simple expedient'of pressing the button I55, the operator can move the handle to feed the work forward, and will not have to concern himself with stopping the handle before cutting, because such is automatically accomplished by engagement of the pin with the knob I89.

The total downward movement of the handle I25 is limited .by engagement of a prom; I6I projecting from the hub I24, and in the path of which a screw IE2 is adjustably threaded into the top of the housing 91, and maintained in adjusted position by a look nut.

Spaced fro-m the feed roll I52 is a second follower roll I also mounted on the lower part of the wall 98, it being secured by a screw I66 (Fig. 11)

The upper part of the front section 3| of the frame forms a table I61 upon which the work rests. The hood 94 is spaced upwardly at its lower edges in the front from the die member 59 and the bed'39 so that the work may be slipped under the hood and under the punches. The two feed rolls I52 and I55 are located above the table I51 and at the rear edge thereof immediately in front of the die member 59.

There are presser rollers I58 and IE9 projecting upwardly through the back part of the table I51 for cooperation respectively with the feed. rolls I 52 and I 85. Both of the rollers I98 and I89 are mounted for rotation on a bar I10 that is restrictedly fioatingly mounted in slots HI and I12 in webs I13 and I14, respectively, in the lower part of the front section 3| of the base. Screws IE5 and I'IIi greater in diameter than the slots are wide are threaded into adjacent walls of the slots and held by lock nuts I11 to restrict downward movement of the ends of the bar I10.

The bar has a link I89 pivoted to a point slightly off-center thereof, and extending downwardly therefrom. This plate is engaged by a pin I8I eccentrically formed on the end of the shaft I82, which shaft is journaled in a bearing I83 in a middle web of the front portion 3i of the device and a bearing I84 in a front web of wall I85 that is indented from the main part of the front wall of the machine, as shown at I86. The shaft I82 projects through the wall I85 and outside the same has an operating arm I81 located in the indentation I88 and by means of which the shaft may be rocked. It will be seen that rocking the shaft will lower the bar I10 and With it the two rolls I88 and I59.

A collar I89 is fastened adjustably about the shaft I82 by a set screw I90. The collar supports a pin I9I receiving one end of a coil tension spring I92, the other end of which is engaged in a pin I93 in the web I13. This spring normally maintains the handle I81 upwardly, in which position the presser rollers I58 and I69 are urged upwardly against the feed rolls I 52 and I65 so as to press the work against the last two named rollers and thereby to clamp it in position. As is evident, the tension of the spring I92 may be varied by adjusting the collar I89.

A latch is provided for holding the rolls I68 and IE9 in downward or inoperative position. This latch includes a latch link I95 pivoted at I96 to a lower web of the front section 3!. A notch I91 is engageable with a pin I98 on the shaft I82 when the shaft is rotated by the handle I81 to inactive position, a rotation of about degrees. The pin I98 engages in the notch I9! and is thereby prevented from returning to active position.

To release the latch, there is provided a plunger I99 forked at one end over the latch I5 and pivoted thereto at 255. The plunger passes through the wall I and has a push button ZiII on the outer end thereof within the indentation I35. A coil spring 252 engages between the pivot 255 and the pin 2533 within the wall I85. This spring normally urges the plunger and with it the latch I95 into position to be engaged by the pin I95. Hence, normally, upon pressing down of the handle id? to lower the presser rolls I and I55, the latch I25 will become effective to hold the rolls in lower position. Pressing the button 2M, however, releases the latch and permits the spring I52 to return the shaft I82 and, by means of it, the presser rolls I58 and I59 to operating position.

There is also provided a work guide and stripper plate 2 H3. The stripper plate portion 25 I has a front part 2I2 turned up at right angles and having slots 253 engageable by the pivots upon which the rolls I52 and 555 are mounted on the wall 98. The slots permit vertical adjustment of the plate. The plate has a central opening 2I4 through which the die passes in the cutting operation. The work, however, is maintained on the bottom side of the plate 2H so that, upon withdrawal of the punch, the work is stripped therefrom. A wire guide 215 extends, as shown in Fig. 20, to guide the work and keep it from irregularities while passing laterally through the machine.

For aligning the direction of the feed rolls, and hence the direction imparted to the work passing through the machine, the rolls I58 and I59 are mounted on the bar I55; and this bar, somewhat flexible, is attached to an angle iron 225. The connection at one end is by means of a screw HI and a suitable spacer collar. There is a similar connection 22I at the middle. At the other end, however, there is a screw 223 threaded through the bar I?!) and passing through the angle iron 225. Look nuts 222 determine the spacing between the bar I15 and the angle iron 220 and, of

course, permit a variation of this distance;

Since the angle iron 220 is substantially inflexible, adjustment of the nuts 222 will, by flexing of the bar IIti, vary the position of the roller I68 slightly forward or backward relative to the roller i 59 and, therefore, will vary the direction of travel of the stencil through the machine.

On the top of the table I51 are provided a series of guide lines 225 and an inner guide line 226. The guide lines 225 give the proper positions for the bottom of a stencil card for cutting one or more lines of characters therein. The line 225 indicates a point to which the card must be inserted to insure thatthe' characters will be completely contained within its'borders. A line I28 determines the distance leftward to which the card must be moved to obtain proper cutting within the lateral limits thereof. There is also provided a smallsquare index 221 indicating the size and alignment of the characters.

The operation of the device is as follows:

A suitable card C, on which it is desired to cut characters, is placed upon the table I61. The handle I8? is depressed, withdrawing-the presser rolls I68 and I59 from the rollers I52 and I55 so that the card may be fed to the left until its left edge at least reaches the line 228, and inwardly at least to a point where its upper edge is as far in as the line 226, and with its lower edge on a line 225. The button 2M is then pressed, unlatching the shaft I82 and permitting the presser rolls I68 and I5!) to move upwardly and press the card against the rolls I52 and I65. By rotation of the hand wheel 83, the desired character is brought beneath the index 84. The operating handle I25 is then pressed downward- 1y. During the first approximately twenty percent. of this downward movement, the cam I22 acts quickly upon the roller I29, causing the link I30 to pivot about its center I3I and, by contact with the adjustable screw I32, move one end of the horizontal centering lever I33 which pivots about its center I34 to cause the rollers I36 on the other end to engage adjacent punch shanks, and thereby to fix the rotating punch carriers against rotation and with the proper one centered in cutting positon. The extra height of the notch I56 in the punch plunger I55 permits at least a part of this centering action to take place before displacement of the punch begins.

During the next part of the movement of the handle I25, the roller I40 operating on the cam edge I54 of the link I42 moves that link downwardly and, through the ratchet mechanism, advances the feed roll I52 a predetermined space proper for the distance between successive characters. The roller I43 is over the hump of the cam prior to the time that the actual cutting by the punch begins.

In the foregoing, it will be seen that the leverage of the handle through the toggle linkage is such that, during the movement so far described, a relatively small amount of movement of the handle produces a comparatively large amount of movement of the punch shank. During this time, the toggle links have been approaching a continuous line with the pivot I2I between the pivot H9 and the hub I24, increasing the leverage of the handle I25 and reducing the amount of movement of the plate H5 and the plunger I05 for a given displacement of the handle I25. When the lever I25 is in its lower position after it has completed the centering and feed operations and when the punch is about ready to pass through the material, its leverage is at its maximum. This gives the obvious advantage that where very little power is required only a small amount is used, but where more is necessar it is provided. This also effects a conservation of handle movement in that, for the most part, little actual displacement of the handle is required. When the handle forces the punch through the work, any deflection of the carrier 56 causes it to strike the screw 45 and thereby be prevented from further deflection. The rigid construction of the bed substantially prevents it from deflecting, it being designed to receive force at this point, as heretofore described.

Upon release of the handle, the springs I26 and I41, acting on the linkages, return it to its starting positon. The centering mechanism by its spring I31 is also returned to starting position and the bell crank ratchet arm I45 moves backward to another tooth on the ratchet wheel to be ready for the new feed.

Should there occur a point for spacing between words, the button I56 is pressed and the handle I25 depressed until the pin I58 strikes the knob I65. In this operation, the handle will have gone down far enough to advance the feed mechanism one notch but insufiiciently to have operated the punch in the work.

At the end of the line, the work is moved in toward the machine to a successive line 225 and the operation is repeated. Should it be necessary to replace the work in the machine after withdrawal, location of a character of a given line over the square 22'! gauges the location of that line relative to the punches.

As noted, the feed mechanism can be adjusted by the nuts 222 to insure that the work will be fed in a proper line through the machine. It will be seen by reference to Figs. and 8 that v the force applied by the eccentric lug I8 I. through the member I80 is nearer the presser roller I68 than the roller I69. As a consequence, there is more pressure applied to the feed roller I52 than to the follower roller I65. Approximately sixty percent. of the total pressure is applied to the feed roller i52 and forty percent. to the trailing uide roller I65. The fact that the bar no floats over the screws I15 and lit insures that the pressure will be divided between the two rollers.

Feeding the stencil board on the downward stroke reduces the possibility of cutting one letter into another by error. There will always be a feed after the work is inserted before the cutting takes place. There will also be a full space,

or none at all, before a cut because of the action of the centering and locking mechanism. It therefore, cooperates with the mechanism for feeding on the down stroke to insure the full spacing. The return spring of the handle mere- 1y acts for that purpose and not to cause the feeding. Hence, the handle effort is reduced because it is necessary to overcome only a slight spring.

Only a short movement of the handle is required for the cutting, which is made possible because of the great leverage of the toggle mechanism.

What is claimed is:

1. In a machine of the kind described, a bed, a carrier, means rotatably mounting the carrier on the bed, means on the carrier to be forced against the bed, said means being eccentric relative to the carrier mounting means, means on the bed to receive said means on the carrier, and a plurality of beams extending generally radially in all directions from said receiving means to distribute the force and reduce deflection of the bed.

2. In a machine of the kind described, a bed of generally circular shape, a support centrally of the bed to receive mechanism on the bed, a pressure receiving means eccentric relative to the support, and a plurality of beams extending from the pressure receiving means to the edge of the bed to distribute the pressure, said beams extending substantially in all diretcions from the pressure receiving means.

3. In a machine of the kind described, a carriage, a pair of shafts, a link shorter than the distance between them, means extending from each shaft to which the link is attached, an operating lever connected to the first shaft, a plurality of cutting devices on the carriage, a carriage centering means, means to operate the car.- riage centering means attached to the first shaft, and adapted to be operated by said shaft durin the first part of its movement, and means changing angular movement of the second shaft to linear movement, said means connecting the second shaft to a cutting device.

4. In a machine of the kind described, a reciprocable cutting device, a shaft, radially extending means on the shaft, means connecting the radially extendin means with the cutting device to move the same to and then through the cutting zone, including means to change the arcuate movement of the radially extending means to linear movement withoutdisplacing the cutting device out of its line of travel, work shifting means, the connecting means being adapted to operate the work shifting means while moving the cutting device prior to the cutting zone, and thereafter to move the cutting device through the cutting zone.

5. In a machine of the kind described, a reciprocable cutting device, a shaft, radially extending means on the shaft, means connecting the radially extending means with the cutting device to displace the same, and including means to change arcuate movement of the radially extending.means to linear movement of the cutting device without displacing the cutting device out of its line of travel, work shifting means, a cam and cam actuator between the shifting means and the connecting means, the cam being shaped to operate the work shifting means during the first part of rotation of the shaft and then to cease, and the connecting means being thereafter adapted to move the cutting device through its cutting positions.

6. In a machine ofthe kind described, a driving shaft, a driven shaft, radially extending means on each shaft, a link pivotally connected between the radially extending means shorter than the distance between the shafts, a cam roller on the radially extending means of one shaft concentric with the link pivot thereof, an actuatable element having an edge adapted to be contacted by the roller and displaced through actuating range during the first part of the movement of said one shaft, a cutting means, and mechanism connecting the cutting means to the driven shaft to cause said cutting means to be displaced through its cutting zone during the latter part of rotation of the driven shaft.

7. In a mechanism of the kind described, a plurality of cutting devices, a first shaft, power means to rotate the first shaft, centering means for the cutting devices, means on the first shaft for operating the centering means during the early part of movement of the power means, a second shaft, means for transmitting movement of the first shaft to the second shaft with increased mechanical advantage, during the latter part of the movement of the power means, and

means to. transmit said latter movement to one of the cutting devices to cause it to perform its cutting action.

8. In a mechanism of the kind described, a plurality of cutting devices, a first shaft, power means to rotate the first shaft, centering means for the cutting devices, means on the first shaft for operatin the centering means during the early part of movement of the power means, a second shaft, means for transmitting movement of the first shaft to the second shaft with increased mechanical advantage, during the latter part of the movement of the power means, means to transmit said latter movement to one of the cutting devices to cause it to perform its outing acion, a work feed mechanism, and means connected with the second shaft for operating the work feed mechanism.

9. In a mechanism of the kind described, a base, a rotary carriage on the base, a plurality of cutters on the carriage, a centering means for fixing, the cutter positions, an oscillatable power means, a first shaft operable thereby, a radially extending means on the first shaft having a cam, a follower therefor, on the centering means, for operation of the centering means upon initial oscillation of the power means, a second shaft, a linkage between the shafts for causing displacement of the second shaft upon displacement of the first and causing greater angular displacement of the second shaft than the first, work shifting means, mechanism connected with the second shaft to cause operation of the work shifting means during the early movement of the second shaft, and mechanism operable by the second shaft to engage a predetermined cutter and to cause the same to engage the work during the latter movement of the second shaft.

10.. In a mechanism of the kind described, a base, a carriage mounted thereon for rotation about a vertical axis, a plurality of cutters on the carriage, a centering means for fixing the cutter positions, first and second parallel horizontal shafts, an operating arm on one shaft for oscillating the same, a plate on the first shaft having a cam surface, a cam follower on the centering means engageable with the cam surface for caus ing operation of the centering means during the early part of the movement of the first shaft, a plate on the second shaft, a link pivoted to'the plates on the twq shafts and shorter than the distance between the shafts, a cam roller on the second shaft plate, work shifting means, a cam follower thereon operable by said cam roller on the second plate, the cam follower being shaped to operate the work shifting means during the early part of the displacement of the second shaft, a linearly displaceable means adapted to engage a predetermined cutter, and means on the second shaft plate to displace the linearly displaceable means upon movement of the second shaft.

HERBERT W. HEMPEL. WALTON C. MARSH.

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