US2407254A

US2407254A - Forming machine

Info

Publication number: US2407254A
Authority: US
Inventors: Guy O Conner
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-02-23
Filing date: 1945-02-23
Publication date: 1946-09-10
Anticipated expiration: 1963-09-10

Description

Sept. 10,1946. s. o. CONNER FORMING MACHINE Filed Feb. 23, 1945 5 Sheets-Sheet 1 INVENTOR Guy 0. Conn er Sept. 10, 1946. G. o. CONNER FORMING MACHINE Filed Feb. 23, 1945 5 Sfieets-Sheet 2 INVENTOR 27 Guy 0 Conner Sept. .10, 1946.

G. O. CONNER FORMING MACHINE Filed Feb. 25,1945 5S1xets-Sheet s V .rrllllllllll Guy 0. Cbnner' m am Sept. 10,194 QGQNNQR 2,407,254

- EbRMING MACHINE Fi'le'd Feb. 25, 1945 v I 5 sh eets sheet 5 .7, lllmiiiii INVENTOR Guy QConner" Patented Sept. 10, 1946 UNITED STATES PATENT OFFICE FORMING MACHINE Guy 0. ConneryClevelan d Heights, Ohio Application February 23, 1945, Serial No. 579,405

' 32 Claims. (Cl.16486) This invention relates to forming machines and particularly to forming machines for high speed operation. It relates more particularly to machines through which work is passed and which act on the work with rapid successive operations. The term forming machine is used herein as a term of definition and not of limitation; my invention is applicable to practically all operations which may be performed on work passed through the machine-examples are stamping, die forming, plastic molding, ceramic moldingrextrusion,

printing, etc. a 1

My invention is especially applicable to forming machines comprising opposed heads for operating onwork positioned therebetween and which relatively move toward and away from each other and when closest togethermo've laterally generally in the same direction. In my copending applicationSerial No. 497,792, filed August @1943, there is illustrated a forming machine comprising opposed sets of parallel shafts having eccentric means thereon and opposed head-s, one mounted on the shafts of each set and carried by eccentric means thereon so that upon rotation of the shafts the heads move toward and away from each other z and when closest together move laterally generally in the same direction. My invention is applicable to such machines but is' also applicable to other machines, as, for example, machines in which one head moves in a circular orbit and the cooperating head partakes simply of linear to and fro motion.

My invention has to do particularly with the counter-weighting of machines employing either one head or two heads movable toward and away from'the work and when acting on the work movable laterally or in the direction of feed of the work. The heads of such machines may beponderous. I operate them at speeds which, incomparisonwith the commercial speeds attained chines of the type above referred to which is of considerable advantage from the standpoints of construction, assembly and operation over the application of -individual counterweights to the various shafts. For example, I provide a forming machine comprising opposed heads for operating on work positioned therebetween and which relatively move toward and away from each other and when closest together move laterally generally in the same direction, a, plurality of parallel shafts on which one of the heads is mounted, eccentric means on the shafts carrying the head to impart the desired movement to the head upon rotation of the shafts, a counterweight also mounted on the same shafts and eccentric means on the shafts carrying the counterweight. Thus a single counterweight may serve for all of the shafts which operate each head. Desirably the counterweight is mounted on the shafts in the same way asthe head is mounted thereon so theforces imposed on the shafts by the counterweight are of the same character as those imposed by the head. The counterweight is preferably arranged on the shafts so that it is at all times approximately radially opposite the head so that the resultants of the forces exerted on the shafts by the head and counterweight are negligible. The counterweight is preferably adjustably carried by the shafts sothat its angular position relatively to the'head may be nicely controlled. It may be attached to the shafts at exactly 180 from the head or atan angle varying slightly one way or the other from 180", depending upon the particular conditions of operation. The adjustment will be such thatthe machine vibrateslittle or none inoperation. Machines counterweighted according to my present invention have operated on work at very'high speeds without even being bolted 'to a foundation and have not even exhibited a tendency to creep.

. The heads and counterweights are, as above stated, applied to their shafts through eccentric framework continually reversing stresses of considerable magnitude which, unless effectively counteracted, set up serious vibrations'which not v,only tend .to deteriorate the machinebearings, and

other parts, as well as the foundation uponjwhich the machine is mounted, but also impose a limitameans on the shafts so that when the shafts ro- Rtate the heads. and counterweights partake of orr bital movement. [The eccentric'means may be any appropriate means accomplishing the function, such for example, as cranks, although I preferto employ eccentric sleeves on the shafts, and'desirably each eccentric sleeve comprises an inner eccentric bushing and an outer eccentric collar mounted on the eccentric bushing so that by appropriate angular adjustment of the bushing and collar the throw oramplitude .of movement of the head or counterweight, as the case may be, as well as the relative angular. positions of the head and counterweight on the shafts may be controlled. I I

. I prefer to arrange the working head means and the counterweight means in machines of the type under discussion so that the respective resultant forces exerted thereby on the shafts act thereon at the same points axially thereof. This may be accomplished in various ways, as, for example, by the provision of counterweights on opposite sides of a head, or the head may straddle the counterweight or the counterweight may straddle the head. Alternatively, the Working head and counterweight may be disposed immediately adjacent each other on the shafts. Various other arrangements of heads and counterweights may be employed, the best results being obtained by arranging the working head means and the counterweight means on the shafts so that the resultants of all the forces imposed on the shafts are as near zero as possible. The shafts are driven by power transmitting means and the working head means and counterweight means may be disposed in various relationships to the power transmitting means depending upon the conditions of operation, as will be explained.

Other details, objects and advantages of the invention will become apparent as the following description of certain present preferred embodiments thereof proceeds.

In the accompanying drawings I have shown certain present preferred embodiments of the invention, in which Figure 1 is a vertical cross-sectional View with a portion cut away of a forming machine, the view being taken on a plane perpendicular to the direction of feed;

Figure 2 is a vertical cross-sectional view taken on the line IIII of Figure 1;

Figure 3 is a fragmentary View similar to Figure 1, but to somewhat reduced scale, of a different structure, portions of the structure being shown in elevation;

, Figure 4 is an elevational view of the structure shown in Figure 3 as viewed from the right-hand side of that figure; v

Figure 5 is a view similar to Figures 1 and 3, but to further reduced scale, showing a further modified structure; and

Figure 6 is a View similar to Figure 2 of the structure shown in Figure 5.

Referring now more particularly to the drawings, there is shown in Figures 1 and 2 a forming machine having an upper working head 2 and.

a lower working head 3 eachoperable in a circular orbit, the working heads cooperating with each other to act upon work passed therebetween. ,The work is fed through the machine in the crosswise direction viewing Figure 2 or in the direction perpendicular to the paper viewing Figure 1. The feeding and guiding means for the work form no part of the present invention and hence are not shown. The work may be fed and guided by hand but I prefer to employ means for that purpose, the feeding and guiding means of my said copending application being recommended. I have shown on the upper head 2 a punch 4 adapted to cooperate with a die 5 on the lower head 3 for either stamping or die-forming work, which may, for example, be strip metal.

The

heads

2 and 3 are mounted upon parallel shafts. The head 2 is mounted upon shafts 6 and I and the head 3 is mounted upon shafts Band 9. The shafts 6 and I are disposed at the same elevation and are the same distance apart as are the shafts 8 and 9, the axes of the shafts 6 and 8 lying in a common vertical plane parallel to the Vertical plane containing thejaxes of the shafts and 9. r

shaft 8 for that purpose.

that head.

II in which the

shafts

6, 1, 8 and 9 are journaled. The uprights are joined by members l2 and by face portions forming a casing in which is disposed the gearing, presently to be described, for driving the shafts 6, I, 8 and 9. The shafts project from the casing, the two upper shafts 8 and I carrying at their projecting portions the upper head 2 and the two lower shafts 8 and 9 carrying at their projecting portions the lower head 3. The projecting shaft portions also carry the counterweights presently to be described. The outer ends of the shafts are journaled in outboard bearings carried by a pedestal [3.

In operation the two upper shafts 6 and 1 turn at the same speed in the same direction and the two lower shafts 8 and 9 turn at the same speed as that of the shafts 6 and l but in the opposite direction. For example, if the work is to move from right to left, viewing Figure 2, the upper shafts 6 and l rotate clockwise and the lower shafts 8 and 9 rotate counterclockwise. To drive the four shafts in the directions indicated and at the same speed gearing is provided in the easing above referred to. Four pinions l4, 15, I6 and l! of equal diameter are keyed to the respective shafts 6, I, 8 and 9, those pinions lying in the same plane indicated by the letter A in Figure 1. A shaft l8 parallel to the shafts 6 and l and disposed therebetween equidistant therefrom is journaled in the uprights l0 and H and has keyed thereto a gear I9 meshing with the two pinions M and 15. A shaft 2% parallel to the shafts 8 and 9 and disposed therebetween equidistant therefrom is journaled in the uprights Ii! and H and has keyed thereto a gear 2| meshing with the two pinions l6 and IT. Two

other shafts

22 and 23 parallel to the shafts which have been described are also journaled in the uprights Ill and H.

In the plane indicated by the letter B in Figure 1 there is keyed to the shaft 1 a pinion 24 of the same diameter as the pinion Hi, there is keyed to the shaft 28 a gear 25 of the same diameter as the gear 21 and the intermediate shaft 23 carries a gear 26 meshing with the gear-

s

24 and 25. In the plane indicated by the letter C in Figure 1 there is keyed to the shaft 8 a pinion 27 of the same diameter as the pinion Hi, there is keyed to the shaft 18 a gear 28 of the same diameter as the gear 19 and the intermediate shaft 22 carries agear 29 meshing with the

gears

21 and 28.

The gearing just described constitutes power transmitting mean for rotating in unison the

shafts

6, 1, 8 and 9 in the directions indicated. Power may be applied through any of the shafts, a driving pinion 33 being shown keyed to the Power for driving the pinion 38 may be derived from any suitable source such as an electric motor.

The projecting portions of the shafts 6, l, 8 and 9, carry eccentric sleeves upon which the

heads

2 and 3 and the counterweight/s to be described are mounted. Each eccentric sleeve comprises an inner eccentric bushing and an outer eccentric collar so that by appropriate angular adjustment of the bushing and collar the throw or amplitude of the head or counterweight, as the case may be, as Well as the relative angular positions of the head and counterweight on the shafts may be controlled. In the form shown in Figure 1 each head straddles the counterweight which is carried by the shafts which carry Each shaft carries two eccentric sleeves upon which'one of the heads is mounted and intermediate such two sleeves another ecthe sleeve is altered.

sleeves 35. "construction so that the corresponding counter- Tcentric sleeve on which one ofthe counterweights mounted. Each of the four shafts carries'two eccentric sleeves 3| each comprising an inner eccentric bushing 32 and an outer eccentric collar 33. Each bushing is normally fast on its shaft but can be turnedthereonfor adjustment and each collar is normally disposed in fixed position on its bushing but can be turned thereon for adjustment; When the sleeve 3| as a whole 'is turned (Without relative turning of the bushing 32 and collar 33) the throw of thesleeve is not altered but the angular position of the head -is' altered. When either the bushing or the collar is turned relatively to the other the throw of .Eachbushing 32 has a radial flange. at its inner end, and between the flanges 34 on each 'of the four shafts 6,1; 3 and 9 is disposedan eccentric sleeve .35 for mounting a counterweight.

Each eccentric sleeve 35 comprises'an inner reccentric bushing36 and an outer eccentric collar '31. Each bushing 36 is normally fast on its shaft but can be turned thereon for adjustment and each collar 31 is normally disp'osed'in fixed position on its bushing but can-be turned-thereon .for adjustment. When the sleeve 35..as awho1e is turned (without relative turning of the bushing 35 and collar 31) the throw of the sleeve is not altered but the angular position of the counterweight is altered. When either the bushing or the collar is turned relatively to the other the throw of the sleeve is altered.

As shown in Figure 1 each of the heads 2 and -3 is mounted on two of the sleeves 3| and a counterweight 38 is disposed generally within each head and is mounted on the corresponding As shown, each head is of hollow eight lies substantially within the head but is free to partake of 'movement relatively to the head which it must do since it is mounted on the shafts atan angle of in the neighborhood of 180 from the corresponding head. In other words, the mounting of, for example, the upper head relativelyto the upper counterweight is suchthat when the head is in its lowermost position and -;moving from right to left, viewing Figure 2, the

counterweight is approximately in its uppermost .position and moving from left to right. .By this arrangement the counterweight effectively counteracts the stresses imposed on the shafts bythe head since the stresses imposed on the shafts by the counterweight are at alltimes substantially opposite in direction to those imposed by the head. The mass of the counterweight is made approximately the same as the mass of the head and attached die so that the respective forces exerted on the shafts by the head and counterweight will not only be opposite in direction but approximately equal in magnitude. The mass of the counterweight may differ somewhat from the mass of the head depending on conditions of operation, but generally speaking the mass of the head and the mass of the counterweight are so related that the forces imposed thereby upon the shafts in operation of the machine will be of approximately equal magnitude.

The positioning of the counterweights within the heads as shown in Figures 1 and 2 results in the bringing to bear upon the shafts of the. forces exerted by the head and counterweight at the same points axially -;of the shafts. 'In other words, the resultant of the forces imposed on a shaft by a head intersects the shaft axis at the same-pomt a that ,at ,whichthe resulta t f the to cause the nickels to fall over.

' force's imposed on the same shaft by the counterweight intersects the shaft axis. Hence if the forces imposed-on the shaft by the head and counterweight respectively are equal and opposite the resultant of all is zero.: The practicaleffect of this is a remarkably smooth-running vibrationless machine which can be operated at speeds until recently believed unattainable. My counterweighting arrangement so effectively neutralizes the'forces exerted on the shafts bythe heads that I have been able actually tooperate a machin upon work at high speedwithout even betting the machine to the foundation. The machine remained in place and exhibited no sub- I was. able to' stantial' tendency to creep. stand nickels on edge on the machine while in operation and there was not sufficient vibration It is. possible to employ individual counterweights on the respective shafts 6, I, 8 and Sin place of the counterweights 38. Individual counterweightsare disclosed in my said copending application. The eccentric sleeves 35 may themselves constitute counterwei hts and may. if desired beenlarged for that purpose. If the eccentric collars-31 are left off the eccentric bushings 36 alonemay serve as counterweightsjand they may be enlarged if desired. When the counterweights 38 are employed the eccentric members 36 and/or 31 may be considered as parts of the counterweights. I believe it to be new to employ heads and counterweights which exert their respective forces on the shafts at the same 'points axially of the shafts regardless of whether individual counterweights on the respective shafts or counterweights spanning the space between cooperating shafts are employed.

. To insure proper orientation of the headsduring operation of the machine I provide on the upper head a vertically downwardly extending guide pin 39 and on the lower head a sleeve 4|] receiving the pin .39 in guiding engagement. The pin 39 and sleeve 40 insure that during operation of the machine the heads will be mainbearing 44 is applied to the ends of the shafts as in the structure of Figures 1 and 2. While there are various specific differences in design between the structure of Figures 1 and 2 and. that of Figures 3 and/l, these are not of importance for present purposes since Figures 3 and 4 are intended simply to illustrate the positioning of the counterweights beside the heads instead of within the heads. The gearing. for operating the shafts inthe structure shown in Figures 3 and 4 may be the same as that of Figures 1 and 2 or it may be of different design. It will be appreciated .that the shafts may be driven in the manner above explained by variousgdifferent gear. arrangements. I Figures 5 and 6 show a further modified construction in which the shafts project from both sides of the casing 45, the heads 46 being carried on the ends of the shafts which project in one direction and counterweights 41 being carried on the ends of the shafts which project in the opposite direction. Also additional counterweights 48 are positioned within the casing 45. Outboard bearings 49 are provided for both ends of the shafts. The arrangement of Figures 4 and 5 is of advantage under certain circumstances depending npon the conditions of operation. Whatever the conditions, it'is desirable to position the heads and counterweights in relation to each other so that the :resultant effects of all the heads and all the counterweights upon all the shafts is as near zero as possible.

The structure of and means for mounting the counterweights of Figure 3, 4, 5 and 6 may be the same as the structure of and means for mounting the counterweights of Figures 1 and 2.

The gear drive in Figures 5 and 6 is specifically different from that of Figures 1 and 2 but the specific gear drive forms no part of the present invention. The gear drive of Figure 1 and 2 or any other drive having the desired effect may be employed.

In Figure 5 the eccentric bushings and collars are shown as provided with indicia facilitating relative adjustment therebetween.

While I have shown and described certain present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto but may be otherwise var- 'iously embodied within the scope of the following claims.

I claim:

1. A forming machine comprising opposed heads for operating on work positioned there- 'between and which relatively move toward and away from each other and when closest together move laterally generally in the same direction, a plurality of parallel shafts -on which one of the heads is mounted, eccentric means on said shafts carrying said head to impart the desired movement to said head upon rotation of said shafts, a counterweight also mounted on said shafts and eccentric means on said shafts carrying said counterweight.

2. A forming machine comprising opposed sets of parallel shafts, eccentric means on said shafts, I

opposed heads, one mounted on the shafts of each set and carried 'by certain of the eccentric means thereon so that upon rotation of said shafts said heads move toward and away from each other and when closest together move laterally generally in the same direction, and opposed counterweights, one mounted on the shafts of each set and carried by other of the eccentric means thereon. 3. A forming machine comprising oppose heads for operating on work positioned therebetween and which relatively move toward and away from each other and when closest together move laterally generally in the same direction, a plurality of parallel shafts on which one of the heads is mounted, eccentric means on said shafts carrying said head to impart the desired movement to said head upon rotation of said shafts, a counterweight also mounted on aid shafts and eccentric means on said .shafts carry- 'ing said counterweight, said eccentric means carrying said .head and said eccentric means carrying said counterweight being relatively turnable on said shafts to alter the relative rotative positions of the head and counterweight.

4. A forming machine comprising opposed heads for operating on work positioned therebetween and which relatively move toward and away from each other :and when closest together move laterally generall-yin the same direction,

a plurality of parallel shafts on which one of the heads is mounted, eccentric means on said shafts carrying said head to impart the desired movement to said head upon rotation of said shafts, a counterweight also mounted on said shafts, eccentric means on said shafts carrying said counterweight and means for varying the throw of said eccentric means.

.5. A .forming machine comprising opposed heads for operating on work positioned therebetween and which relatively move toward and away from each other and when closest together move laterally generally in the same direction, a plurality of parallel shafts on which one of the heads is mounted, eccentric means on said shafts carrying said head to impart the desired movement to said head upon rotation of .said shafts, a counterweight also mounted on said shafts, eccentric means on said shafts carrying said counterweight, said eccentric means carrying said head and said eccentric means carrying said counterweight being relatively turnableon said shafts to alter the relative rotative positions of the head and counterweight, and means for varying the throw of said eccentric means.

6. In a forming machine, a plurality of parallel shafts, two sets of eccentric bushings on said shafts, an eccentric collar on each bushing, a working head mounted on said shafts, said head being carried by one set of bushings and collars, and a counterweight mounted on said shafts, said counterweight being carried by the other set of bushings and collars, the bushings and collars being turnable relatively to the shafts and to each other to alter the relative rotative positions of the head and counterweight and vary the amplitudes of movement thereof about the axes of said shafts upon rotation of the shafts, and said bushings and collars being fastenable to the shafts and to each other in desired positions so as to rotate with the shafts.

'7. In a formingmachine, a plurality of parallel shafts, means for rotating said shafts in unison, two sets of eccentric means on said shafts, a working head mounted on said shafts and carr'iedby one set of eccentric means and a counterweight mounted on said shafts and carried by the other set of eccentric means.

8.111 a forming machine, a plurality of parallel shafts, means for rotating said shafts in unison, a plurality of sets of eccentric means on said shafts, working head means comprising at least .one member spanning the space between said shafts and mounted on said shafts collectively and carried by at least one set of eccentric means and counterweight means comprising at least one member spanning the space between said shafts and mounted on said shafts collectively and carried by at least one other set of eccentric means.

'9. Inc. forming machine, a plurality of parallel shafts, means for rotating said shafts in unison,

a plurality of sets of eccentric means .on said shafts, working head means comprising at least 1 one member spanning the space between said shafts and mounted on said shafts collectively and carried by atleast .one set of eccentric means and counterweightmeans comprising atleastone member spanning the space between said shafts and mounted-on saidshafts collectively and carried by at least one other set of eccentric means, said working head means and said counterweight means being arranged on the shafts so that their respective resultant forces act on the shafts at substantially the same points axially thereof.

In a forming machine, a plurality of parallel shafts, means for rotating said shafts in unison, a plurality of sets of eccentric means on said shafts, working head means comprising at least one member spanning the space between said shafts and mounted on said shafts collectively and carried by at least one setof eccentric means and counterweight means comprising at least one member spanning the space between said shafts and mounted on said shafts collectively and car ried by at least one other set of eccentric means, said working head means and said counterweight means being arranged on the shafts so that'their respective resultant forces act on the shafts at substantially the same points axially thereof and are substantially opposite in direction. .1

11. In a -forming machine, a plurality of parallel shafts, means for rotating said shaftsin-unison, a plurality of sets-of eccentric means'on. said shafts, working head means comprising at least one member spanning the space between said shafts and mounted on said. shafts collectively and carried by at least one .set of eccentric means and counterweight means comprisingat least one member spanning the space between said shafts and mounted on said shafts collectively and car.-v ried by at least one other set of eccentric means, said wo'rkinghead means and said counterweight means being of such mass and so arranged on the shafts that their respective resultant forces'act on the ,shaftsfat substantially the same points axially thereof and are substantially: equal" in magnitude and opposite in direction. i

12. In a forming machine, aplurality of'para1. lel shafts, means for rotating said shafts in unison, eccentric means on said shafts, working head meanscomprising at least one member spanning the space between said shafts and mounted on said. shafts collectively and carried by certaineof. said eccentric means and counterweight means comprising at least one member spanning the spacebetween saidshafts and mounted on said shafts collectively and carriedby other of said-"eccentric means, the eccentric means carrying one.

of the working head means and counterweight means being disposed on the shafts on both sides of the eccentric means carrying the other thereof.

'13. Ina forming machine, aplurality of paral;

lel shafts, means for rotating said shafts in uni-1- son,eccentric means on said shafts, working head means comprising at least one member spanning the space between said shafts and mounted on said shafts collectively and carried by certain of said, eccentric means and counterweight means comprising at least one member spanning the space between saidshaft and mounted on saidshafts collectively and carried byother of said eccentric means, one of the working head means and counterweight means straddling the other thereof axially of theshafts. f ;j l

14. In a forming machine, a plurality ofparallel shafts, means for rotating said shafts in unison, eccentric means on said shafts, working head means comprising at least one member spanning the space between saidshafts and mounted on said shafts collectively and carried by certain of said eccentric means and counterweight means com-- prising at least one member spanning the space between said shafts and mounted on said shafts collectively andcarried'by other of said eccentric means, one of theworking head means and counE terweight means stiaddling the other thereof axially of. the shafts and saidworking head means and said counterweight means being arranged on the shafts so that their respective resultant forces .10 act on the shafts at substantially the same points axially thereof.

15. In a forming machine, a plurality of parallel shafts, means for rotating said shafts in unison, eccentric means on said shafts, a working head mounted on said shafts and carried by certain of said eccentric means and a counterweight mounted on said shafts and carried by other of said eccentric means, the working head straddling the counterweight axially of the shafts.

16. In a forming machine, a plurality of parallel shafts, means for rotating said shafts inunison, eccentric .means on said shafts, a working head mounted on said shafts and carried by certain of said'eccentric meansand a counterweight mounted on saidshafts and carried byiother of said eccentric means, the working head straddling the counterweight axially. of. the shafts and also covering, and concealing the counterweight.

v17. In a forming machine, a. plurality of paral-,

" lelshafts, means for rotating said shaftsin-uni son, eccentric means on said shafts, a working head mounted on said shafts and carried by certain of said eccentric means and a counterweight mounted on said shafts and carried by other of said eccentric means, the working head and counterweight being disposed immediately adjacent eachother on the shafts.

18. Ina-forming machine, a plurality'of parallel shafts, driving means for rotatingsaid shafts in unison, eccentric means on said shafts, a working head mounted on saidshafts and carried by certain of said eccentric means and a counterweight mountedon said shafts between the driving meansand theworking head and carried by other of said eccentric means.

19. In a forming machine, a plurality of parallelshafts, driving means for rotating said shafts in unison, eccentric means on said shafts, a working headmounted on said shafts and carried by certain of said eccentric means and a counterweight mounted on said shafts between the driving means and the working head and disposed immediately adjacent the working head and carried by other of said eccentric means.

20. Inc, forming machine, a plurality of parallel shafts; power transmitting means for; rotating said shafts in unison, a casing about said power. transmitting means, said shafts projecting through a wall of the casing and being journaled. therein, outboard bearing means for the outer ends of said shafts, eccentric means on said shafts between said casing wall and said outboard hear ing means, a working head mounted on said shafts and carried by certain of said eccentric.

'means and a counterweight mounted on saidshafts and carried by other of said eccentric.

means.

1 21. In a forming machine, a plurality of parallel shafts, power transmitting means for rotatingsaid shafts in unison, bearing means for said shafts adjacent the power transmitting means, said shafts projecting therefrom, bearing means for the projecting portions of saidshafts, eccentrio means on said shafts between said firstmentioned bearing means and said second mentioned bearing means, a working head mounted on sa d shafts and carried by certain of said eccentric means and a counterweight mounted on said shaftsand carried by other of said eccentric means. 1 22. In a forming machine, a plurality of parallel shafts, power transmitting means forrotating said shafts in unison,gbearing means for said shafts adjacent the power transmitting means,

I said shafts projecting therefrom, bearing means for the projecting portions of said" shafts, eccentric means on said shafts between said first mentioned bearing means and said second mentioned bearing means, a working head mounted on said shafts and carried by certain of said eccentric means and a counterweight mounted on said shafts and carried by other of said eccentric means, said working head and said counterweight being. arranged on the shafts so that their respective resultant forces act on the shafts at substantially the same points axially thereof.

23. Ina forming machine, a plurality of parallel shafts, power transmitting means for rotating said shafts in unison, bearing means for said shafts adjacent the power transmitting means, said shafts projecting therefrom, bearing means for the projecting. portions of. said shafts, eccentric means on said shafts between said first mentioned bearing means and said second mentioned bearing means, a working head mounted on said shafts and carried by certain of said eccentric means and a counterweight mounted on said shafts and carried by other of said eccentric means, said working head and said counterweight being disposed immediately adjacent each other on the shafts.

24. In a forming machine, a plurality of parallel shafts, power transmitting means for rotating. said shafts in unison, bearing means for said shafts adjacent the 'power transmitting means, said shafts projecting therefrom in both directions, eccentric means on both projecting portions of said shafts, a working head mounted on said shafts on one side of said power transmitting means and carried by certain of said eccentric means and a counterweight mounted on said shafts on the opposite side of said power transmitting means and carried by other of said eccentric means.

25. In a forming machine, a plurality of parallel shafts, power transmitting means for rotating said shafts in unison, bearing means for said shafts at opposite sides of said power transmitting means, said shafts projecting beyond both of said bearing means, eccentric means on at least one projecting portion of said shafts, a working head mounted on said eccentric means, other eccentric means on said shafts between said respective bearing means and a counterweight mounted on said other eccentric means.

26. In a forming machine, a plurality of parallel shafts, power transmitting means for rotating said shafts in unison, bearing means for said shafts atopposite sides of said power transmitting means, said shafts projecting beyond both of said bearing means, three sets of eccentric means on said shafts, one set on each of the projecting portions of said shafts and one set between said respective bearing means, a working head mounted on at least one of said sets of eccentric means and a counterweight mounted on at least one of said sets of eccentric means, each of said three sets of eccentric means having mounted thereon a working head or a counterweight.

2'7. In a forming machine, a plurality of parallel shafts, power transmittingmeans for rotating said shafts in unison, bearing means for said shafts at opposite sides of said power transmitting means, said shafts projecting beyond both of said bearing means, three sets of eccentric means on said shafts, one set on each of the projecting portions of said shafts and one set between said respective bearing means, a work- '12 mg head mounted on one of said sets of eccentric means and counterweights mounted respectively on each of the other sets of eccentric means.

28'. In a forming machine, a plurality of parallel shafts, power transmitting means for rotating said shafts in unison, inner bearing means for said, shafts at opposite sides of said power transmitting mean, said shafts projecting, beyond both of said inner bearing means, outer bearing means for the respective projecting ends of said shafts, three sets of eccentric means on said shafts, one set between the respective inner bearing means and one set between each of the outer bearing means and the nearer inner bearing means, a working head mounted. on one of said sets of eccentric means. and coimterweights mounted respectively on each of the other two sets of eccentric means.

29. In a forming machine, aplurality of parallel shafts, power transmitting means for rotating said shafts in unison, inner bearing means for said shafts at opposite sides of said power transmitting means, said shafts. projecting beyond both of said inner bearing means, outer bearing means for the respective projecting ends of said shafts, three sets of eccentric means on said shafts, one set between the respective inner bearing means and one set between each of the outer bearing means and the nearer inner bearing means, a working head mounted on the set of eccentric means between one of the outer bearing means and'the nearer inner bearing means and counterweights mounted respectively on each of the other two sets of eccentric means.

30. In a forming machine, a plurality of parallel shafts, means for rotating said shafts in unison, eccentric means on said shafts, working head means comprising at least one member spanning the space between said shafts and mounted on said shafts collectively and carried by said eccentric means and counterweight means mounted on said shafts, said working head means and said counterweight means being arranged on the shafts so that their respective resultant forces act on the shafts at substantially the same points axially thereof.

31. A forming machine comprising opposed heads for operating on work positioned therebetween and which relatively move toward and away from each other and when closest together move laterally generally in the same direction, a plurality of parallel'shafts on which one of the heads is mounted, eccentric means on said shafts carrying said head to impart the desired movement to said head upon rotation of said shafts and counterweight means also mounted on said shafts, said heads and said counterweight means being arranged on said shafts so that their respective resultant forces act on said shafts at substantially the same points axially thereof.

32. A forming machine comprising opposed sets of parallel shafts, eccentric means on said shafts, opposed heads, one mounted on the shafts of each set and carried by eccentric means thereon so that upon rotation of said shafts said heads move toward and away from each other and when closest together move laterally generally in the same direction, and counterweight means also mounted on said shafts, said heads and said counterweight means being arranged on said shafts so that their respective resultant forces act on said shafts at substantially the same points a ially thereof.

GUY O. CONNER.