US2409968A - Machine for operating on materials - Google Patents

Description

4 v L. A.- WELSCH 2 8 MACHINE FOR OPERATING ON MATERIALS Filed Aug. 24, 1945 s Sheets-Sheet 1 INVENTOR. LOUIS A. WELSCH ATTORNEY Oct; 22, 1946'. A. wELscH MACHINE FOR OPERATING ON MATERIALS Filed Aug. '24, 1945 Sheets-Sheet 3 FIQG 38 32 35H 39 I 45 26 42 Fl 0'4 a F -HL I451 IS INVENTOR.

LOUIS A.WE.LSC.H

/QHW ATTORNEY Patented Oct. 22, 1946 MACHINE FOR OPERATING N MATERIALS Louis A. Welsch, StJPaul, Minn., assignor to American Hoist & Derrick 00., St. a corporation of Delaware Paul, Minn.,

Application August 24, 1945, Serial No. 612,510

- Claims. 1 I

This invention has relation to a machine for operating on materials. As herein illustrated and described, the machine has been devised to be especially useful to the purpose of trimming and'punching metal blanks, but it is to be under- StQOd that the principles of the invention also are applicable to machines for performing various types of operations, such as forming, bending and shaping operations, etc., upon metals or other materials. That is to say, although the disclosed embodiment of the invention presents a machine for trimming and punching metal blanks, a machine including features and characteristics of the invention may be equipped to perform various different types of operations upon metals and other materials.

An object of the invention is to provide a machine for operating upon materials which will be of novel and improved construction.

A further object is to provide a machine of the character here presented wherein will be incorporated various improved features and characteristics of construction which will be novel both as individual entities of the machine and in combination with each other.

A further object is to provide a machine for operatingon materials which will include a novel and improved construction and arrangement for accomplishing feed of the materials from station to station in the machine, as well as feed of the materials out of said machine.

A further object is to provide in a machine of the character here presented, novel and improved mechanism including cylinders, each having a piston, arranged atright angular relation to each other for accomplishing feed of an article or articles to be operated upon in the machine from station to station of said machine.

And a further object is to provide a machine for operating on materials which will include features and characteristics of construction as hereinafter set forth.

With the above objects in view, as well as others which will appear as the specification proceeds, the invention comprises the construction, arrangement and combination of parts as now to be fully described and as hereinafter to be specifically claimed, it being understood that the disclosure herein is merely illustrative and intended in no way in a limiting sense, changes in details of construction and arrangement of parts being permissible so. long as withinthe spirit of the in vention and the scope of the claims which follow.

In the accompanying drawings forming a part of this specification,

Fig. 1 is a longitudinal sectional view, partially in side elevation and partially broken away, of a machine for operating on materials made according to the invention I n Fig. 2 is a fragmentary longitudinal sectional view,partially in side elevation and partially broken away, substantially agreeing with the'disclosure of Fig. 1, butshowing'operative parts of themachine in different positions;

Fig. 3 is a sectional View, taken on line 3-3 in Fig. 2, disclosing a lower stationary die and horizontal and vertical cylinders of the machine in plan;

Fig. 4 is a fragmentaryside'elevational view of the lower stationary die of the machine; Fig. ,5 isfa fragmentary side elevational view of an upper movable die of the machine;

Fig. 6 is a fragmentary bottom plan view of the disclosure of Fig, 5;

Fig.7 ,is a plan view, on an enlarged scale, of a piece of metal prepared tohave or include blanks intended to be first trimmed or struck from said metal and later punched out; n

Fig. 8 is a plan view of a blank as when removed from the piece of metal disclosed in. Fig. 7;

Fig. 9 is an end elevational view of the blank ofFig.8;and s Fig. 10 is a side elevational view of the blank of Figs. 8 and 9. s 1

With respect to the drawings and the numerals of reference thereon, l5 denotes a frame of the machine adapted to be supported in any suitable andconvenient manner, It indicates :a lower piece l8 of metal including or having separate blanks, each denoted l9, ready to be trimmed or struckfromsaid piece of metal, and in Figs. 8 to IO there is disclosed one of the blanks [9 as when struck from the piece l8 of metal. a

In the disclosure as made, each blank I!) 'isior providing a so-call'ed clamping block or shoe to be constituted as a part of a rope or cable clamp. Conveniently, the clamping blocks orsho es" can be constituted as drop iorgings, of steel, and in 7 of the drawings the blanks IS in the piece [8 of metal are drop" forgings intended first or be trimmed or struck from said piece l8 of metal and afterwards to be punched out, at 2|], 20, thus to provide clamping blocks or shoes, such as the clamping block or shoe, or blank l9, disclosed in Figs. 8, 9 and 10, adapted to constitute parts of rope or cable clamps.

It will be seen that th blank ill, or clamping block or shoe, as disclosed has dimension in crosswise direction substantially equal to the dimension of said blank, or clamping block or shoe, in lengthwise direction, although the crosswise dimension of the blank, or clamping block or shoe, could in instances be greater. or less than the block or shoe, The straight marginal edges 21,

2! of each blank I9 are considered to be the ends of the blank, and the curvedmarginal edges 22, 22 of each blank are considered to be the sides, simply because the clamping blocks or shoes are adapted tobe applied to a rope or cable so that the ,inargihal edgesZl, 21 are disposed transverse'ly 'of the rope or cable. When the correspo'nding'cla'mping block or shoe'is applied to a rope .or cable, its holes or: openings or punched out portions" 25, 2B, for receiving aU-bolt, will be atrdppo'site sides of said ,rope. or cable and in alinedlrfel'ajtiontoeach other in direction transversely of the rope orcable. Stated otherwise, the bolt holes or openings 2B, 20 are in a plane alined-with and-equally spaced from the opposite ends 21, 2f er the corresponding clamping block or shoe l9. Also, the bolt holes or openings 20, 2B are ina plane perpendicular to the corresponding clamping, block or shoe at its lateral aXisJ The clamping blocks or shoes are duplicates. Each has lengthiconside'rably greater than a measuremen-t representing the diameterof either bolt hole or opening 20, and each include'sanf intermediate portion 23, thereof disposed betweenjlthe bolt holes r openings 20 20 and "oppositeend portions 24,

' 24 2fi, 28 of theclampin'g block or shoe disposed at opposite sides of the lateralaxis of the clamping block or shoe, as well asat oppositesides of the-,ali-nedbolt holes or openings 20, The end portion's'z-l, 24f, 2d,2 4'integrally support lugs 'or prongs 25, '15, 25,25 disposed at the rope or .cable engagingside of the clamping block or shoe, and said lugs or prongsconstitute separate pairs of lugser prongs upon the opposit sideportions of the elampingblockor shoe. The lugs or prongs 25, 25, 25, 2,5 of each pair will belin spaced, alined relation transversely of a rope or cable upon which a rope, or cable clamp having the clamping block 7 en shoe;,,is fastened, and lugs' or prongs of each set-will be in spaced, alinedrelation longitudinally of the rope or cable. As disclosed, the lugs or prongs; are situated in equally spaced relation to the lateral axis of the corresponding clamping blockor shoe l9; and at opposite sides of and adjacenttothe bolt holes 0! openings 20, 20. As shown, the lugs or prongs are adjacent what may be; termedthe four corners of the corresponding clamping block or shoe and are set a trifle inshape and overall; size of each blank or clamping bl d? Q 9 53- {H t a s the O n l ta -Pa e ten tsen of Shapev d size snugly to permit passage of each of the dupliwhen trimmed or struck from, the

piece lit-oi metal throughsaid opening fll. Said element or female-die. entity 26 is sup- I ported, as at 28, uponthe 'lower stationary die it so that the opening 21 is situated above a longitudinal guideway 29 of the machine extending longitudinally of said lower stationary die i6. More explicitly, the longitudinal guideway 29 is defined atits base by a horizontal surface Bil, provided by the lower stationary die I6 and, situated beneath and in spaced relation to the workingieleinentjor femaleentity a6, and at its opposite sides by spaced apart, parallel, vertically and longitudinally extending surfaces 3|, 3|, also provided by said lower stationary die I6. The

vertical, longitudinalsurfaces 3|, 3| are spaced from each other a distance substantially equal to, or slightly greater than, a measurement representing ie'length, or distance between the ends 2!,25, of each of the duplicate blanks l9, and the working element or female die entity 2B is parallel with the horizontal surface 30 and spaced from said horizontal surface a distance somewhat greater than a measurement representing the thickness of each of said blanks l9.

Theguideway 29' isopen at each of its opposite ends, c s v s A working element 'of the upper movable die it .is constituted as a male die entity 32' having a working surface 33 0f substantially the shape.

and'overall size of each blankorclarnpingblock orshoe l9. That is to say, the working element or male die entity 32 includes a working surface 33 of shape and size to cause each blank, mama ing block orshoe when situated over the opening 2? in the working element-orjfemale die entity 25 to be trimmed or struckfrom the piece GS of metal when said working element or male die entity 32' islowered to sufficient extentand to be deposited in the guideway 28, upon its horizontal surface 353, when the working element or male otherwise, the working element or male die entity .is of shape and size to cause each blank l9 to'f be sheared from the piece l8 of metal, and, desirably, said ivorking, element or male die entity 3.2 will be of shape andsize to enter the opening 2? in about the manner as disclosed in Fig. l of the drawings, thus to cause the sheared off blanks' positively to be pushed downwardly through the opening Zl in the working element or female die entity 25, with. downward movement o'fxthe upper movable "die, llto position beneath that adapted to cause a'blank ill to, be trimmed, struck or sheared'from the. piece 18 of metal. Each blank l9, whenremoved from said piece l8 o'fTrnetal will, naturally, have tendency to;-fa l l bygravity to the horizontal surface 3!), between thfiside'surfaces 3!, 3i, of'the guideway as. The

male die entity 32 desirably will be made to enter the female die entity 26 during the final stage of yide s, apart of the horizontal surface 39 of the guideway'zil), having spaced apartopenings 36 3itherethr0ugh each of substantially the shape and size of each of'the boltholes or openings 2t, 20. The spaced apart openings-t5,- Stare in alinement in direction longitudinally of the guideway2 9, said openings 36, 36 are spaced'apart the same distance as are the bolt holes or openings 29,2!) of each blank, and each of the openings 36,36 through the female die entity 34 is of shape and size to permit passage of metal struck from a blank Hi to provide a bolt hole or opening 29 through the corresponding opening 36. Continuing portions of the openings 36, 36, extending downwardly through the lowerstationary die 55, are denoted 31, 31. i

A second working element of the .upper movable die I1 is constituted as a male die entity 38 including spaced apart punches 39, 39 each of substantially the shape and size of each of the spaced apart openings 35, 3.6 through the. female die entity .34. The spaced apart punches 39, 39 are in alinement in direction lon itudinally of the guideway 29,-said punchesare spaced apart the same distance as are said spaced apart openings 36, 36, and the punches 39, 39 are of shape and size to be capable of causing metal to be struck from the blanks, l9 and deposited into theopenings 36, 36 through the female die entity 34, whence the metal can passfrom the machine by gravity, with lowering of said punches 39, 3.9 to sufficient extent. Stated otherwise, the punches 39,. 39 are of shape and size to be capable of causing metal intended to be removed from the blanks l9 thus to provide the bolt holes or openings 29, 2-9 to besheared from said blanks and deposited into the outlet openings 36, 3'! leading away from the machine. Desirably, the punches 39 will be caused to enter upper reduced portions of said openings 36 in about the manner as disclosed in Fig. 1 of the drawings thus toinsure that the. metal struck from the blanks to cause the bolt holes or openings to be produced will not become struck in the female die entity 34.

The construction and arrangement of course will be such that the opening 2i. of the female die entity26 and the working surface 33 of the male die entity 3?. will be in vertical alinement, as will also the openings 36, 36 of the female die entity 34 and the punches 39, 39 of the male die entity 39. In practical operation of the machine, a piece, suchas 18, of metal having blanks, such as l9, to be trimmed or struck, or otherwise removed, therefrom will be placed upon the female die entity 26 so that a blank to be removed will be over and alined with the opening 21 through said female die entity 26. Then the upper movable die I! will be depressed thus to cause a blank to be removed from the piece of metal and de posited to the portion of the guideway 29 directly beneath said opening 21 in the manner as before made plain. During the succeeding upward movement of said upper movable die ll, the blank will be fed ahead, in a manner to be set forth, to the location of the female and male die entities 34 and 38 and so that portions of the blank intended'to be removed to the provision of the bolt holes or openings, such as 29, 20, will be alined, with the openings and punches 36, 39 and 36, 39, respectively. Then another of the duplicate blanks to be removed from a piece, such as [8, of metal will be placed upon the female die entity 26. Withthe next downward movement of the upper movable die I! said last mentioned blank will be trimmed or struck from the piece of metal and depositedin the guideway'29, and, also, bolt holes or openings, such as .20, 29, will be produced in the blank then at the location of the female and male die entities 34"and .38." Duringthe next upward movement of said upper movable die 11, the blank thenidirectly beneath the opening 21 will be fed ahead to the location of the female and male die entities 34 and 38, and feeding of this mentioned blank to position where it is to :be provided with bolt holes or openings, such as 29, 29, will cause the blank which was provided with bolt holes or open ings during the immediately preceding downstroke of the upper movable dial! to be pushed clear of the punches 39, 39 and the openings 36, 36. Eventually, the blanks will be pushed, one by another,clear of the inner end of the guideway 29, whence said blanks will be free to fall on by one out of the machine. i

The disclosure includes mechanism now to be described for accomplishing feed of the blanks from station to station in the machine, and eventually clear of the machine.

Each blank i9 is deposited in the guideway 29 so that its straight end edges 2|, 2| are parallel with and adjacent to the vertical side surfaces 3i, 3| of said guideway 29 and its curvilinear side edges 22, 22 are situated forwardly and rearwardly and disposed transversely of the guideway.

A feed member 49, situated within the guideway 29 adjacent to or contiguouswith its lower horizontal surface .339 and adapted to be reciprocated Within and longitudinally of said guide: way, includes a forward curvilinear working surface 4| thereof adapted to be engaged against a rearward curvilinear surface 22 of each blank l9 while at the first station in the machine, beneath the female and male die entities 26 and 32, when said feed member is moved inwardly, thus to cause the blank to be fed to the second station 'in the machine, over the openings 36, 36 of thefernale die entity 34 and under the punches 39, 39 of the male die entity 38. A yoke for the feed member 49 includes an outer base portion 42, adjacent an end of the lower stationary die l6, and. spaced apart, parallel arms, denoted 43, 43, perpendicular to and rigid with said outer base portion 42 and extending longitudinally inwardly .of said lower stationary die at opposite sides of the die entities 26, 32, 34, 38. A central part of the feed member 40 is rigidly connected to the midlength of the outer base portion 42 through the instrumentality of a bar 44 between said feed member and outer base portion, and the spaced apart, parallel arms 43, 43 of the yoke are mounted in guides 45, 45, 4 5, 45 upon the lower stationary die l6 for slidable movement in direction longitudinally of said lower stationary die. It will be apparent that the feed member 49 will be moved inwardly with movement of the yoke toward the left in the drawings and will be moved outwardly with movement of said yoke toward the right.

The frame l5 of the machine suitably and conveniently rigidly supports a horizontal cylinder 46 and a vertical cylinder 41. As disclosed, said horizontal and vertical cylinders are constituted as a more or less unitary structure. The horizontal cylinder 46 includes closure heads, indicated 48 and 49, respectively, and the vertical cylinder 47 includes a closure head 59. A piston 5| within the horizontal cylinder 46 is rigid, with a connecting rod 52 slidably situated in the closure head 49 and extending outwardly away from said horizontal cylinder 46 in horizontal direction toward the lower stationary die l6 and the feed member 40. As disclosed, the horizontal corinecting rod 52 is in longitudinal alinement with the bar 44 and in a vertical plane passed through the midwidth of the guideway 29 as well as con,-

7 trally through the feed member 40. The outer end portion of'said horizontal connecting rod 52 is rigidly connected, as at 53, t the midlength of an'i'nner base portion 54%, parallel with the 62 and 63,'and the outlet connection "leads into said connection 8! at location between the mantical connecting rod 56 is situated at a side of the upper movable die l1 and is rigidly connected to said upper movable die as indicated at 51.

A passageway 58 for oil, or other fluid, extends between the upper end portion of the vertical cylinder 41 and the inner end portion of the horizontal cylinder 46. A port between the passageway'58 and the vertical cylinder 41 is denoted 59, and a port between said passageway 58 and the horizontal cylinder it is indicated 60, Also, a passageway 6| extends between the lower end portion of said vertical cylinder 41 and the outer end portion of said horizontal cylinder 45. A port between thepassageway 6| and the vertical cylinder 41 is denoted 52, and a port between said passageways 8| and the horizontal cylinder H5 is indicated 53. The passageway 58 affords communication between a space 64 of the vertical cylinder 41 above the piston 55 and a space 55 of the horizontal cylinder 46 at the side of the piston 5| adjacent the stationary and movable dies l6 and H. The passageway 6i aifords communication between a space 55 of said vertical cylinder 41 below said piston 55 anda space 61 of said horizontal cylinder 35 at the side of said piston 51 opposite said'station-ary and movable dies It and l1. 7

The frame of the machine rigidly supports, as at 68, an anchor plate having extension portions 59, 69 alined with the arms #3, '43 of the yoke and situated at the side of the inner base portion 54 of said yoke opposite the feedmember 46. An attachment plate rigidly supported, as at 10, upon the inner ba-se portion :55 includes extension portions 1i, H which project beyond the opposite ends of said inner base portion. Tension coil springs 12, 12, including a tension coil spring at the outer side of each yoke arm 43, have'their inner ends connected, as at13, 13, to the extension portions 1!, H of the attachment plate upon the inner baseportion 5d andtheir outer-ends'connected, as at 14, 1t, tothe extension portions 65, 69 of the anchor plate upon the frame l5. The tension coil springs 12, 12 are assembled with the frame and the yokeso as to exert resiliency upon said yoke tending to urge the feed member to inwardly,

A pump 15 is for forcing oil or other fluid into the spaces 84, 65, 5 6, 61 of the horizontal and vertical cylinders 45 and 41 and for causing pres'-. sure of hydraulic fluid in said spaces to be equalized. An outlet connection from the pump 15, controlled by a manually actuable valve 16, is'denoted 11, andan inlet connection to said pump, controlled by a manually .actuable valve 18, is indicated 19. Theinlet connection it to the pump 15 leads, as represented at 89, from an upper portion of the space 54 of thevertical'cylinder 41. A connection 8|, controlled by a manually actuable valve 82, leads from a part of the! inlet connection 19 between the manually .actuable valve 18 and the space t4 and enters the passage-' way 61 atlocation, denoted 83, between the ports ually actuable valve 82 and said passageway 6| Assuming that the horizontal and vertical cylinders 46 and 41 contain hydraulic fluid, it will be evident that with downward movement of the upper movable die l1 the connecting rod 56 and the piston 55 Will be forced downwardly in the vertical cylinder 41, thus to cause hydraulic fluid to be forced out of the space 66 of said vertical cylinder 41 through the passageway 5| into the space'fi'l of the horizontal cylinder 46, and that hydraulic fluid forced into said space 61 of said horizontal cylinder 55 will cause the piston 5| r and the connecting rod 52 to be moved in direction toward the lower stationary die l6, thus to cause the yoke and the feed member 49 to be moved outwardly against resilient action of the tension coil springs 12, 12. In Fig. l of the drawings, the piston 55 is disclosed at the lower limit of its stroke, the piston 5| is disclosedat the outer limit of its stroke, and the feed member 40 is disclosed at the outer sideof the opening, 21 through the female die entity 25. During downward movement of the piston 55 and resultant outward movement of the piston 5!, which, naturally, causes the spacesst and 65 in the ver tical and horizontal cylinders 41 and 46 to be decreased and the spaces 64 andfiT in said vertical and horizontal cylinders to be increased, hydraulic fluid also will be forcedfromi-the space 5 in the horizontal cylinder it through the passageway 58 into the space -64 in the vertical cylinder 41. With upward movement of said upper movable die llthe connecting rod 56 and the piston 55 will-be moved upwardly in the vertical cylinder il thus to cause hydraulic fluid to be forced out of the space 64 of said vertical cylinder 41 through the passageway 58 into the space 650i the horizontal cylinder 46. The hydraulic fluid forced into said space55 of said horizontal cylinder A5 will cause the piston 5| and the connecting rod 52 to be moved inwardly, away from the lower stationary die 16, and the tension coil r springs 12, 12 will assist saidpiston 5| andconnecting rod 52 in their action to force the feed member to be movedinwardly. In Fig. 2 of the drawings, the piston 5| is disclosed at the inner limit of its stroke, the piston 55 is disclosed at the upper limit of its stroke, the outer base portion 42 of the yoke is disclosed against an adjacent surface of the lower stationary die l6 thus to'limit inward movement of the feed member 40, and said feed member is disclosed at po-f sition situating a blank l9 atlocation between the openings 35, 36 inthe female, clie entity 34 and the punches 39, 39 of the male die' entity38. During upward movement of said piston 55 and inward movement of said piston 5! which causes the spaces 6 and 61 in the vertical and horizontal cylinders 41 and to bedecrea'sed and the spaces 56 :and 65 in saidvertical and horizontal cylinders to be increased, hydraulic fluid also will be forcedfrom'the space 61 in thehorizontal cylinder v45 through the passageway 6| into the space 65 in the vertical cylinder 41.

During normal operation of the machine; all of the manually actuable valves 16, 18, 82 will be closed. Clearly, the positions of the pistons 5|: and in the horizontal and Vertical cylinders 46 and 4.1 can be adjusted insimple and easy man her while the manually actuable valve 82 is in open position. Stated otherwise, should itbe desiredto adjustthe piston 55 in the 'verticalicylin-f der41, or to adjust the position of the piston 51 in the horizontal cylinder 46, adjustment can be readily and easily accomplished with the manually actuable valve 82 open obviously to cause the cylinder spaces Ed, 65, 66, 61 to be in open relation to each other.

, Inasmuch as outward movements of the piston :i and the feed member 40 are accomplished solely by pressure of fluid within the spaces 66 and B1 of the vertical and horizontal cylinders 41 and 46, against resilient action of the tension coil springs 12, 12, while inward movements of said piston and said feed member are accomplished by cooperative action of pressure of fluid in the cient and satisfactory operation. Should pressure within the spaces 66 and 67 become diminished to extent affecting proper operation of the machine, hydraulic fluid can be forced into said spaces 66 and 6'! simply by opening the manually actuable valves 16 and I8 and operating the pump 15. Operation of said pump will cause hydraulicfluid to'travel under pressure through the outlet connection H, the connection 8! and the passageway 6| into the spaces 66 and 61. Should the piston ,5! be moved outwardly by pressure of hydraulic fluid pumped into said spaces 66 and 61, the tension coil springs l2, '52 will cause said piston 5| to be returned to its intended and proper position after operation of the pump is completed and before the valves Iii and 18 are moved to closed position. Operation of said pump l5 while the manually actuable valves Hi and 18 are in open position and the manually actuable valve 82 is in closed position can cause pressure of hydraulic fluid in the system to be equalized. That is to say, hydraulic fluid forced into the spaces 65 and El by the pump also can be forced past the pistons 5i and 55 into the spaces 65 and 64. Operation of the pump 15 after said spaces 65 and 64 become full of hydraulic fluid merely will cause overflow of hydraulic fluid from the space 64 through-the inlet connection 19 back to the pump.

It will be seen that the new and improved machine is equipped to cause inward movement of the feed member 40 to be accomplished at uniform rate of speed thus to cause the blanks to be fed ahead, from station to station, in the machine in regular, steady and even manner. Although the tension coil springs l2, 72 have potential normally to draw or pull the feed member inwardly, inward movement of said feed member obviously will be accomplished in synchronism with upward movement of the upper movable die 11.

What is claimed is:

1. In combination, a structure including a first and a second cylinder arranged at angular relation to each other, a first piston in said first cylinder, a. second piston in said second cylinder, a first space in said first cylinder at one side of said first piston, a first space in said second cylinder at one side of said second piston, a first connecting passageway between said first spaces of said first and second cylinders, a second space in said first cylinder at the opposite side of said first piston, a second space in said second cylinder at the opposite side of said second piston, a second con necting passageway between said second spaces of said first and second cylinders, a pump for delivering hydraulic fluid to all of said spaces and connecting passageways, an inlet to said pump leading from said first space in said first cylinder, a first valve in said inlet a connection from said second space of said second cylinder lea-ding to a portion of said inlet between said first space in said first cylinder and said firstvalve, a second valve in said connection, an outlet from said pump leading to a portion of said connection between said second valve and said second space in said second cylinder, and a third valve in said outlet.

2. In combination, a stationary die, a movable die adapted to be reciprocated toward and away from said stationary die, a feed member adapted to be reciprocated along a line at angular relation to the line of reciprocation of the movable die in response to reciprocation of said movable die, a unitary structure providing a first and a second cylinder arranged at angular relation to each other, a first piston in the first cylinder connected to said movable die, a second piston in the second cylinder connected to said feed member, a first connecting passageway in said unitary structure between a first space of the first cylinder at a side of the first piston adjacent the movable die and a first space of the second cylinder at a side of the second piston adjacent the feed member, hydraulic fluid, in said first connecting passageway and first spaces of the first and second cylinders, a second connecting passageway in the unitary structure between a second space of said first cylinder at a side of said first piston opposite said movable die and a second space of said second cylinder at a side of said second piston opposite said feed member, and hydraulic fluid in said second connecting passageway and second spaces in the first and second cylinders.

3. In combination, a stationary die, a movable die adapted to be reciprocated toward and away from said stationary die, a feed member adapted to be reciprocated along a line at angular relation to the line of reciprocation of the movable die in response to reciprocation of said movable die, a unitary structure providing a first and a second cylinder arranged at angular relation to each other, a first piston in the first cylinder connected to said movable die, a second piston in the second cylinder connected to said feed memher, a first connecting passageway in said unitary structure between a first space of the first cylinder at a side of the first piston adjacent the movable die and a first space of the second cylinder at a side of the second piston adjacent the feed member, hydraulic fluid in said first connecting passageway and first spaces of the first and second cylinders, a second connecting passageway in the unitary structure between a second space of said first cylinder at a side of said first piston opposite said movable die and a second space of said second cylinder at a side of said second piston opposite said feed member, hydraulic fluid in said second connecting passageway and second spaces in the first and second cylinders, and means for resiliently urging said feed member to be actuated in a single direction along its line of reciprocal movement.

a. In combination, a feed member and mechanism for accomplishing reciprocation of said feed member, comprising a unitary structure, a first cylinder in said unitary structure arranged at angular relation to the line of reciprocation of said feed member, a, first piston in the first cylinder, a first connecting rod secured to said first 11 piston at a side thereof adapted to be actuated to accomplish reciprocation. of said first piston, a second cylinder in the unitary structure arranged parallelly of the line of reciprocation of said feed member, a second piston in the second cylinder, a second connecting rod secured to said second piston at a side thereof, means securing said second connecting rod to said feed member, a first space in said first cylinder at the side of said first piston having said first connecting rod, a first space in said second cylinder at the side of said second piston having said second connecting rod, a first connecting passageway in said unitary structure between said first spaces in the first and second cylinders, hydraulic fluid in said first spaces of said first and second cylinders and in said first connecting passageway, a second space in said first cylinder at the side of said first piston opposite said first connecting rod, a second space in said second cylinder at the side of said second piston opposite said second connecting rod, a second connecting passageway in the unitary structure between said second spaces in the first and second cylinders, and hydraulic fluid in said second spaces of said first and second cylinders and in said second passageway.

5. In combination, a feed member and mechanism for accomplishing reciprocation of said feed member, comprising a unitary structure, a first cylinder in said unitary structure arranged at angular relation to the line of reciprocation of said feed member, a first piston in the first cylinder, a first connecting rod secured to said first piston at a side-thereof adapted to be actuated to accomplish reciprocation of said first piston,

a second cylinder in the unitary structure arranged parallelly of the line of reciprocation of said feed member, asecond piston in the second cylinder, a second connecting rod secured to said second piston at a side thereof, means securing said second connecting rod to said feed member, a first space in said first cylinder at the side of said first piston having said first connecting rod, a first space in said second cylinder'at the side of said second piston having said second connecting rod, a first connecting passageway in said unitary structure between-said first spaces inthe first and second cylinders, hydraulic fluid in said first spaces of said first and second cylinders and in said first connecting passageway, a second space in said first cylinder at the side of said first piston opposite said first connecting rod, a second space in said second cylinder at the 'side of said second piston opposite said second connecting rod, a second connecting passageway in the unitary structure between said second spaces in the first and second cylinders, hydraulic fluid in said second spaces of said first and second cylinders and in said second connecting passageway, and means for resiliently urging said feed member to be actuated in a single direction along its line of reciprocal movement.

LOUIS A. WELSCI-I.

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