US2085648A

US2085648A - Press

Info

Publication number: US2085648A
Application number: US25783A
Authority: US
Inventors: Rudolph W Glasner
Original assignee: Clearing Machine Corp
Current assignee: Clearing Machine Corp
Priority date: 1935-06-10
Filing date: 1935-06-10
Publication date: 1937-06-29
Anticipated expiration: 1954-06-29

Description

June 29, 1937. V

' R. w. GLASNER PRESS Filed June 10, 1935 5 Sheets-Sfieet 1 June 29, 1937.

"R. w. GLASNER 2,085,648

PRESS Filed June 10, 1935 5 Sheets-Sheet 2 June 29, 1937. R. w. GLASNER I ,648

PRESS Filed June 10, 1935 5 Sheets-Sheet 3 I \\m \\m June 29,1937. jw, LASN R 1 2,085,648

' I "PRESS Filed June 10, 1935 5 Sheets-*Sheet 4 June 29, 1937. w. GLASNER PRESS Filed June 10, 193 5 5 Sheets-Sheet 5 "Patented June 29, I 1937 UNITED STATES PATENT OFFICE 2.085.648 mess Rudolph W. Glasner, Chicago, Ill., assignor to Clearing Machine Corporatiom Chicago, 111., a corporation of Illinois Application June 10, 1935, Serial No. 25 ,783

a Claims. .(01. 113-38) This invention relates in general to power presses and more particularly to the type of press in which there is employed a plurality of reciprocable die carrying slides.

5 Heretofore in presses of this character the 10 the second slide would commence its movement,

and on the return stroke the movements of the slides with relation to each other are also fixed. Such movements, as well as the order of movement of the slides with respect to each other could not be changed or varied.

Itis one of the objects of the present invention to provide in a press of this character improved means whereby the movement of each slide may be controlled independently with respect to each other, and the time and order of operation of one slide with relation to the other may be selectively controlled or determined, according to the nature of the work being operated upon, and at the will of the operator.

It is also important thatmeans should be provided to arrest the movement of the slide or slides at any predetermined point in the cycle of its operation, and that this point of arrest in the movement of the slide be accurately repeated upon each stroke of the press, for any desired number of strokes without any appreciable variations in such point of arrest.

Heretofore in the operation of presses of this character, and by reason of inaccuracies. caused by the stopping mechanism, such as slippage of the braking means, overthrow of the driving mechanism for the slides, or for various reasons, it is not always possible to arrest the movement of the slide at the limit of its throw, with the resuit that there will be a slight movement of the slide away from the work, or the slide may be arrested before it reaches the limit of its stroke,

which conditions are undesirable, and in many instances disastrous with respect to the work being operated upon.

It is therefore another object of the present invention to provide in a press of this character improved means for minimizing the inaccuracies of the stopping or the arresting of the slide at the limit of the stroke, or at a predetermined point, by reason of the slippage of the braking means,

overthrow of the slide actuating means, or for various other reasons. This may be accomplished by means of linkage mechanism forming operative' connections between the slides and the respective slide driving or operating mechanism. These links are so designed and arranged, that if there should be a considerable. overthrow or underthrow of the operating or power, means, 5

. any motion of the slide by reason of such overthrow or underthrow at the desired stopping point. or limit or the stroke, will be only a small fraction in the up and down movement of the slide, as compared with the movement of the 10 driving means, and which fraction of movement will not be sumcient to appreciably affect the gripping or holding action upon the work, of the die carried by the slide.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features-of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and 20 claimed and shown in the accompanying drawings illustrating the invention in connection with a press in which there is provided a plurality of reciprocable die carrying slides, and in which drawings 25 Figure 1 is a view partly in elevation, partly in section, partly broken away, and with parts omitted, of a press of this character constructed in accordance with the principles of this invention, and as taken on line I--i, Figure 2. 3

Figure 2 is a vertical, sectional view as taken on line 2-2, Figm'e 1. 7

Figures 3, 4 and 5 are diagrammatic views showing one of the slides, the operating mechanism therefor, and the position the slide will as- 35 sume at different points in the cycle of operation of the same.

Figure 6 is an enlarged detail sectional view of a form of clutch mechanism.

Figure '7 is a wiring diagram. 40 Figure 8 is a view partly in elevation, partly in section and partly broken away, of one of the controls for one of the clutches.

press frame is arranged a -bed I3 upon which latter a die I4 may be mounted.

Reciprocable upon suitable guides I5 carried by the uprights II is a slide I6, to which a die I1 is connected. The slide I6 is adapted to be given a reciprocatory movement preferably in the following manner. A shaft I8 is supported in suitable bearings I9 in the press frame, and which shaft may also extend through .bearings in intermediate partitions or uprights 29 in the crown.

Supported by the shaft I8 and preferably adjacent each end of the shaftare opposed eccentrics 2I-22, one pair of the eccentrics being provided for each end of the'slide I6. Eccentric straps 23-24 respectively co-operate with the eccentrics 2l22, and these straps are also respectively provided with arms 25-26 of any desired or suitable length.

Levers 21, preferably ofthe bell crank type, are pivotally mounted as at 28 on each side of the shaft I8, one arm 29 of the lever being piv-v otally connected as at 32 with one end of a link 33, of any desired or suitable length, and the other end of each of the links 33 is pivotally connected as at 34 to anchoring devices 35 which are adjustably connected to the ends of the slide I6.

Any suitable fastening means for the anchoring device may be provided, and to that end the anchoring device may be screw threaded to pass I through portions 36 of the slide, and nuts or collars 31 may be provided on the threaded portion of the anchoring device for securing the anchoring device and the slide adjustably together. One set of these eccentric and link con nections is arranged at each end of the slide I6.

The bell crank levers 21 are adapted to be I oscillated about their pivots 28, and to that end the pivots 28 may be formed by a shaft connecting the co-operating levers or .the levers may oscillate about the shaft.

Each of the eccentrics 22 at each end of the outer slide is connected with a gear 38 for rotation therewith, and these gears are mounted to rotate about the shaft I8.

Each of the eccentrics 2I at the end of the slides is connected for rotation with a gear 38',

and these gears also are supported by and are rotatable about the shaft I8.

The gears 38 rotate in one direction as indicated by'the arrow in Figure 2, and the gears 38- rotate in the opposite direction, causing the respective eccentrics 2I-22 to rotate in the directions indicated by the arrows in Figure 1. The gears 38 are rotated by means of pinions 38 meshing therewith and secured to a shaft 48 for rotation with the shaft, while the gears 38" are rotated by means of pinions 38 meshingtherewith and secured to a shaft 43 for rotation therewith.

All of the gears and the eccentrics thus-far described are preferably located withinthe hollow crown of the press.

The

shafts

49 and 43 are connected together by means of intermeshing gears44-45, and to one of the shafts 48-43 is secured a drive pulley 4| over which a driving belt 42 passes. The pulley constitutes the portion of a clutch mechanism to be hereinafter. described. The belt receives its motion from any suitable source of power so that, under certain conditions, to be hereinafter described, when the shafts 48-43 are rotated by the pulley M, the gears 38 and 38- together with the eccentrics connected thereto, will be rotated about the shaft I8, causing a reciprocation of the slide I8.

In the present form of the invention there is shown a second slide 46 (see Figure 2) which is reciprocable within the slide I6 and is adapted to carry a die 41 which is secured thereto.

This inner slide 46 is also reciprocable by means of eccentrics 48-49 arranged adjacent each end of the inner slide and preferably intermediate the innermost eccentrics 2l22, The eccentrics 48-49 adjacent each end of the inner slide are opposed to each other and are rotated about the shaft I8, eccentric straps 58-5I co-operating with the respective eccentrics. These straps are respectively provided with arms 52, similar to the arms 25-26, to each of which arms one end of a lever 53 is pivotally connected as at 54, the lever being mounted to oscillate about the pivot 28. The other end of each of the levers 53 is pivotally connected as at 55 to a link 56, and the other end of each of the links 56 is pivotally connected as at v51 to an anchor device 58, each of which is adjustably secured to the inner slide '46. To that end the anchor device may be The lever 53 may be provided with a tubular extension 69 Journaled upon the shaft I8, and carrying arms 6I to which one end of one of the links 56 is pivotally connected as at 62, and the other end of the link 56 is pivotally connected as at 63 to an anchoring device 64 that is adjustably secured to the slide 46. When the levers 53 are rocked about the pivot 28, the arms 6I will co-operate with the lever 53 to assist in reciprocating the slide 46.

The eccentrics 48 and 49 are'respectively secured to gears 65-66, and the eccentrics are disposed in opposite directions with respect to each other. The gears 46 are rotatable about the shaft I8, and to that end there is provided a shaft 61 journaled in-suitable bearings, and to which shaft is connected a pinion 68 which meshes with the gear 65.

A shaft 69 journaled in suitable bearings has secured to it a pinion 18 which meshes with the gear 66, and these two shafts 61-69 are connected together by intermeshing gears 1I-12, respectively secured thereto, and to one of which gears "-12, a clutch member 13, to be hereinafter more fully described, is secured. When the clutch 13 is rendered active in a manner to be described, the gears 65-66 will be rotated in the directions indicated by the arrows in Figure 2, and this will cause the inner slide to be reciprocated.

Beneath the bed I3 of the press is arranged a slide carrying a'die 15 which, in the present form of the invention operates through the bed of the press and also within the die I4, and cooperates with the die 41 on the inner slide 46, to shape the work 16, the die I1 on the outer slide I6 also co-operating with the die I4 to hold the work 16 while it is being operated upon.

This lower slide 14 is operated in a manner similar to the other slides of the press, and to,

that end there is provided a suitable shaft 11 mounted in suitable bearings below the bed of the press, and rotatable about the shaft 11 .are gears 18-19. To the gear 18 there is secured an eccentric 88 with which an eccentric strap 8I cooperates, and this strap is provided with an arm 82- to which one end 83 of a bell crank lever 84 is pivotally connected as at 85,. the lever 84 being oscillatable about a pivot 88. The other arm 81 of the bell crank lever is pivotally connected as at 88 to one end of a link 89, and the other end of the link 89 is pivotally connected as at 98 to a securing device 9I which is adjustably connected to the slide I4. To 321: gear 19 is se- 'The free end of the link is pivotally connected as at I82 to a fastening or anchoring device I83 adjustably secured to the slide I4.

The gears I8 and I9 are adapted to be rotated in the following manner.

A pinion gear I84 is secured to a shaft I85 for rotation therewith and which shaft is journaled in suitable bearings. Apinion I88 is secured to a shaft I8I for rotationtherewith, and the shafts I85 and I8I are connected together for simultaneous rotation by means of intermeshing ears I88--I8.9. One of the shafts I8 5-I8I is connected to the shaft of a clutch member II8 of the slides is the same at both ends of the slide,

There is shown in Figure 6 of the drawings a form of clutch mechanism, and as the mechanism is similar in the clutches 4|, I3 and I I8, 9. specific description of one will apply to each of the clutches. The particular clutch shown is de-' signated by the reference character I2 in Figure 2.

The clutch element III is secured to the shaft v8l for rotation therewith and is preferably connected to the shaft by means of a key connection II2 adapting the element to be moved lengthwise of the axis of the shaft. A spring II3 operates upon the clutch element and tends normally to move it in one direction with respect to the cooperating clutoh element I3.

A magnet or electro-responsive device H4 is provided for operating the clutch element III, and co-operating with the magnet is an armature or solenoid I I5, having connection by means of a suitable yoke II8 with the clutch element III.

When the magnet H4 is energized, the clutch element III willbe moved against the stress of the spring II3 to effect an operative connection between the clutch element III and the shaft 81 so as to cause the clutch element I3 to be rotated with the shaft. When the magnet H4 is' d'e-energized, the spring II 3 will move the clutch element III into an inactive position with re-. spect to the element I3, and the clutch element 513 will then be adapted to rotate independently with respect .to the clutch element III.

Connected to the clutch element I3 for rotation therewith are gears III-I I8--I-I-9', and over the gear III a sprocket chain I28passes, and this sprocket chain also passes over a sprocket wheel I2I connected with the clutch element 4| which is mounted upon the shaft 43 for rotation thereabout, so that when the clutch element H is I rotated, its motion will be transmitted through the v 7 sprocket chain I28 to the clutch element I3 which rotates freely upon the shaft 81. The clutch element H is mounted loosely upon its supporting shaft so as to continuously rotate but when the clutch element H is secured to the cooperating clutch element, the shafts 43 and 48 will be rotated. Passing over the sprocket wheel II8 which is secured to the freely rotatable element of the clutch, is a sprocket chain I22 whichalso passes over a sprocket wheel I23 on the freely rotatable element I24 of the clutch device II8 that controls the movement of the lower slide 14, the clutch device I3 controlling the rotation of the

shafts

81 and 89 that rotate the

gears

85 and 88 that control the operation of the inner upper slide 48. I i

It will thus be seen that there is provided a clutch device for. controlling the operation of the outer upper slide I8, a clutch device for controlling the operation of the inner upper slide 48,.

and a clutch device for controlling the operationof the lower slide I4, all of which are operatively connected and which devices are adapted to be selectively controlled in a manner to be described so as to vary or alter not only the time of operation of the respective slides in the cycle of operation of the machine, but to vary or alter the relative time of operation of these slides one with respect to the other.

It will therefore be manifest that in order to selectively control the operation of the slides, it is onlynecessary to selectively control the clutch devices on the respective operating shafts for the slides.

Any suitable means may beprovided for that purpose, but in the present exemplification of the invention there is shown a control mechanism similar to that disclosed in my copending application, Serial Number 738,555, filed August 4, 1934, andin such control there is provided a cir cult control box indicated diagrammatically by the reference numeral I25 (see particularly Figure 1), to which current is supplied by feed lines I26I2I. This box may be of any desired construction and is provided with circuit control detrol the clutch for the lower slide designated by the letter L in Figure 'I. H

The numeral I3I in Figure '7, indicates dia grammatically a motor for controlling the operation of the press and which is connected to the feed lines by means of conductors I32--I33, a switch or cut out device I34 k eing provided in one of the connections for the purpose of rendering the motor active or inactive at will.

Secured to a shaft I35 (see particularly Figure 1) which is mounted preferably in bearings in a bracket I38 are discs or rotatable elements I3I-- I38--I39, one for each of the control devices, and as the construction and operation of each of these devices I 31--I38-I 39 is the same, the description of one will apply to them all..

The element I3I is provided on opposite faces with grooves or channels I48opening-through the faces thereof having enlarged portions I4 I. Slides I42 fit within the grooves or channels and are provided with extensions I43 which are preferably threaded. These extensions each pass through a finger I44 preferably provided with a is adapted to be moved from the position shown in full lines to the position shown in dotted lines in Figure 8, by loosening another collar I45.

With this arrangement it will be manifest that when the fingers are moved to the position shown 5 in full lines in Figure 8, and secured in that position, they will be in an active position to project beyond the periphery of the element I31, but when it is desired to render the fingers inactive; the fastening nut I45 is loosened and the finger I44 turned to the dotted line position and then secured in this position.

Co-operating with the respective elements I31- I34I35 are tappet wheels I41 rotatably supported by a shaft I48 journaled in suitable bearings I45. One of these tappet wheels I41 is provided for each of the elements I3'I-I 38--I 39, and.

each is provided with fingers I44 arranged on opposite faces of the respective elements I31 Ill-I59. when these tappet wheels I41 are rotated by engagement of the tappets or fingers I44, a step by step movement will be imparted to the element I41, and the rotation of these elements will cause the switches (not shown) to be actuated to establish or interrupt the circuit or current through the switch box to the respective electroresponsive devices II4.

This operation will be caused by the fingers of one faceof the elements I31-I35I39, and the elements I41 will be operated by the fingers on the other face of such element to re-establish or interrupt the circuit through the electro-responsive devices, so that during the operation of the elements I'31-I55-II5, one set of fingers will open the circuit, and one set of fingers will close it.

Obviously, therefore, by arranging the tappets or fingers I44 with respect to each other, the circuits to the various electro-responsive devices may be readily controlled.

It will also be manifest that by setting the 40 fingers I44, the slides I5, 45 and 14 may be controlled in their operation so as to render any one or more of the slides inactive to cause them to operate upon the work simultaneously, to cause them to operate upon the work successively, or to 45 cause some of the slides to be rendered active, while others remain inactive, or to change the relative operation of one with respect to the other, all according to a predetermined selection by the operator.

50 Any suitable means may be provided for rotating the elements I31, I35 and I39, but a simple and efllcient means embodies a sprocket chain I55 (see Figure 1) which passes over a sprocket wheel I25 on the shaft I35 and also over a 5g sprocket wheel I II connected to a shaft I52 of a speed reducing mechanism indicated diagrammatically by the reference numeral I53.

Another sprocket I54 constitutes a portion of the speed reducing mechanism (not shown but .0 which may be of the ordinary well known construction), and over, this sprocket I54 a sprocket chain I55 passes. This sprocket chain I55 also passes over the sprocket H5 (see also Figure 6) carried by the clutch element 13, (and which as clutch element is freely rotatable about the shaft 51, when the co-operating clutch element is rendered inactive, in a manner to be set forth) so that when the shaft 51 is rotated, motion will be imparted to the sprocket chains I55-I50 to rotate 70 the shaft I35 and with it the elements I31- It is thought that the operation of this portion of the mechanism will be clearly understood from the foregoing, but briefly stated it is as follows. 15 The respective slides I5, 45 and 14 are actuated by means of their respective operating mechanisms, and the operation of the actuating mechanisms is controlled by the respective clutch devices, so that by controlling the clutch devices it will be possible to control or selectively render active or inactive predetermined ones of the slides, thereby placing in the control of the operator a means whereby any one or more of the slides may be rendered active. As before stated, the slides may be caused to operate either simultaneously upon the work, on opposite sides thereof, successively, or some of the slides may be rendered inactive, and the relative operation of the slides upon the work with respect to each other may also be controlled or varied.

At the same time the period of dwell of the dies upon the work may be controlled or varied, and the length or period of dwell of the dies carried by the respective slides upon the work and with relation to each other may also be varied. This is accomplished by setting the fingers or tappets I 44 upon the respective elements I31-I38I39, according to the desire of the operator and of the work to be performed.

The mechanism, after the fingers or tappets have been set, is automatic in operation, and the operation. of each of the slides may be automatically commenced and stopped at any time in the cycle 'of operation of the press or at any point within the 360 of rotation of the driving or actuating eccentrics of the respective slides.

After the tappet fingers I44 have been set and the switch I34 closed, the circuit will fiow through the respective electro-responsive devices 0, I and L in Figure 4. For controlling the outer slide, the current will flow from the conductor I25, through the conductor I51, electro-responsive device II40, conductor I58, switch device I59, conductor I50 back to the conductor I21. Similarly, when the inner slide is to be rendered active, current will flow from the conductor I25, through the conductor I5I, electro-res'ponsive device I I, conductor I52, through the switch box I 53, out of the switch box, through the conductor I54, back to the conductor I21, and likewise, when the lower slide is to be rendered active, the current will flow from the conductor I25, through the conductor I55, electro-responsive device II4L, conductor I55, switch box I51, out through conductor I 58,back to the conductor I21.

Thus, it will be manifest that the current may be caused to flow through either one or more of the electro-responsive devices 0, I and L, and by the control of fiow of the current through these devices, the operation of the slides I5, 45 and 14 may be correspondingly controlled. Inasmuch as the operating mechanism for the upper slide is disposed within the upper crown, and the operating mechanism for the lower slide is disposed in the lower crown of the press, which latter is also hollow, and as'these crowns constitute lubricant receptacles, the operating mechanism will be immersed or submerged in the lubricant, thereby obviating the necessity of providing special lubricating ducts or channels leading to the respective parts of the operating mechanism.

In theform of press shown in Figure 10, the lower slide 14 is operated by means of eccentrics I59I15 connected to shafts I1II12. Eccentric straps I13-I14 respectiyely cooperate with the eccentrics I58I1l and are connected by means of arms I15I15 to members I11-I18, which are adjustably connected as at I19-I55 to the slide 14. These members I11-I15' respectively slide through guides I5II52 to maintain the slide 14.

in proper position and to relieve the slide of lateral stress so asto prevent binding of the slide upon its upright guides.

One set of these eccentrics 169-410 are arranged at each side of the slide.

Connectedrespectively to the shafts I'll-I12 are gears l83-I84, and with which gears pinion gears [85-486 respectively mesh. These pinion gea'rsare secured respectively to shafts Nil-488, and to these shafts are respectively secured gears I89l90. The gears l89l90 intermesh so that when one of the gears l89l90 is rotated, the other gear will be simultaneously rotated, and these gears will in turn, through the medium of the gears l85-l86 respectively rotate the eccentrics I69-l'lll. v

The gear I89 is preferably rotated by means of the belt or chain I22, which passes over a pulley [9| secured to the shaft I81. The lower slide is controlled in its movement by means of the electro-responsive devices IL, in the same manner as the slide I4 in the form of the invention shown in Figure 1 is controlled.

It will therefore be manifest that with the present invention each of the work forming or shaping slides is adapted to be controlled in its operation independently with respect to the operation of the others. It will also be manifest that there is provided controlling means with mechanism adapted to be set soas to cause the operation of the slides to be varied with respect to each other at will. This will render it posssible for the operator to cause any two or more of the slides to operate simultaneously or independently with respect to each other, and it is also possible to selectively control the .operation of each slide so that the period of dwell or time of operation with respect to the other slides may be altered or varied so that the operator may have absolute control of the operation of the slides It is even possible in the present invention to keep one or more of the slides inactive while the other slides remain active, without the necessity of changing any of the mechanisms of the press or dismantling any of the parts, 'The'structure as disclosed in this application permits adjustment by the operator for the action or inaction of any of the slides at will, simultaneously, individually or selectively.

It is also important that the respective slides be arrested at the limit of their stroke at predetermined points'in the cycle of operation of the press and to maintain this point of arrest or'stopping of the slides the same in repeated operations of the slides. 1

By reason of inaccuracies which are caused by the stopping mechanism, such as slippage of the braking means, the overthrow of the driving eccentrics,'or by reason of many. other conditions, it has not been possible heretofore to accomplish this ,result, that is the accurate stopping of the slide at a predetermined point.

It sometimes happens that the stopping or braking mechanism will operate upon the slide to arrest its movement before it reaches the limit of its stroke or' the overthrow of the eccentrics, or the momentum of. the eccentrics or driving shafts and gears will cause the slide to be retracted or moved away from the work before'its movement is arrested, with the result that sometimes this will be disastrous to the work.

With the present invention and by the provision of the link connecting means between the slides and the eccentrics and gears which operates the slides, the inaccuracies of the stopping or of the arresting of the slide at the limit of its stroke is minimized, and-any movement of the slide due to such overthrow of the operating mechanism or for other reasons will only be a small fraction of the up and down movement of the slide as compared with the movement of the driving means, and this small fraction of movement will not be sufllcient to appreciably affect the gripping or holding action of the dies carried by the slide, upon the work- This is clearly shown in Figures 3 to 5 of the drawings, which illustrate only one slide, but the operation is the same with all of the slides.

In Figure 3 the slide I6 is shown at the limit of its throw with the

pivots

28, 32 and 34 between the link 33 and the slide and crank arms substantially in alinement, illustrating that the slide has been arrested at the limit ofits movement and the stopping of the slide has been accurate.

In Figure 4, however, the position of the parts is shown in the event that there has been a slight overthrow of the eccentrics or the driving mechanisms. In this position it will be seen that the

pivots

28, 32 and 34 are slightly out of alinement. This movement has not appreciably affected the up and down movement of the slide l6 at the limit of its stroke because when there is an overthrow, the bell'crank levers will be rocked about their pivots 28 and the links 33 by reason of their pivotal connections 32 with the bell crank lever and pivot 34 with the slide,

will swing about the pivots 34 as well as about the pivots 32 for a sufiicient distance to compensate such overthrow and this will not affect the up and down movement of the slide to any appreciable extent, such movement under such conditions which may occur, being only a small fraction of its up and down movement, which is not sufficient to affect the gripping or holding action of the die I I carried by the slide, upon the work.

In Figure 5 the parts are shown in the position they will assume when the slide is being raised out of engagement with the work.

With this invention it will be manifest that there is not only provided means for selectively controlling the operation of the slides one with respect to the other, and of the variation of the movement of the slides with respect to each ,other, but there is alsodisclosed a means whereby the operator can control the operation of the slides, and the movement of the slides will be arrested at a predetermined point even at the appreciably affect the slide. That is, the slide after it has reached the limit of its throw will substantially remain at such point, even though the operating mechanism, the eccentrics, gears,

, etc., continue to operate by momentum, causing an overthrow after it has been attempted to stop the mechanism, regardless of such overthrow.

This same result will be accomplished in the event that the slide is arrested in its movement before it reaches the limit of its throw, that is in case of an underthrow of the operating mechanism with respect to the slide. and the work. 'jWhile the preferred forms of the invention have been herein shown and described, it is to be understood that variouschanges may be made in the details of construction and in the combination and arrangement of the several parts,

within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:-

1. In a press, a. plurality of slides on one side of the bed, an eccentric supporting shaft, a plurality 'of sets of eccentrics rotatable about said 10 shaft, a pair of shafts parallel to and on opposite sides of the first said shaft, a plurality of sets of rocking members mounted to move upon the said pair of shafts, link connections between one of said slides and one of said sets of rocking members, link connections between the other of said slides and the other of said sets of rocking members, eccentric strap connections between one set of said eccentrics and one set of said rocking members, eccentric strap connections between 2 the other set of eccentrics and the other set of said rocking members, and means for rotating said eccentrics about the eccentric supportin shaft.

2. In a press, a plurality of slides on one side 25 of the bed, an eccentric supporting shaft, a plurality of sets of eccentrics rotatable about said shaft, a pair ofshafts parallel toand on opposite sides of the first said shaft, a plurality of sets of rocking members mounted to move upon the said 30 pair of shafts, link connections'between one of said slides and one of said sets of rocking menibers, link connections between the other of said slides and the other of said sets of rocking members, eccentric strap connections'between one set 35 of said eccentrics and one set of said rocking members,'eccentric strap connections between the other set of eccentrics and the other set of said rocking members, means for, rotating said eccentrics about the eccentric supporting shaft,

' and means for selectively and variably controlling the rotation of said eccentrics.

3. In a press, a pluralityof slides on one side of the bed, an eccentric supporting shaft, a plurality of sets of eccentrics rotatable about said shift, a pair of shafts parallel to and on opposite sides of the first said shaft, a plurality of sets of rocking members mounted to move upon the said pair of shafts, link connections between one of 'of said eccentrics and one set of said rocking members, eccentric strap connections between the other set of eccentrics and the other set of said rocking members, means for rotating said eccentrics about the eccentric supportingshaft, 5 a slide on the other side of the bed, and means for reciprocating the last said slide.

4. In a press, a plurality of slides on one side of the bed, an eccentric supporting shaft, a plurality of sets of eccentrics rotatable about said 0 shaft, a pair of shafts parallel to and on opposite sides of the first said shaft, a plurality of sets of rocking members mounted to move upon the said pair of shafts, link connections between one of said slides and one of said sets of rocking 15 members, link connections between the other of said slides and the other of said sets of rocking members, eccentric strap connections between one set of said eccentrics and one set of said rocking members, eccentric strap connections between the other set of eccentrics and the other [set of said rocking members, means for rotating said eccentrics about the eccentric supporting shaft, a slide on the other side of the bed, means -for reciprocating the last said slide, and means for selectively and variably controlling the operation of all of said slides. v

5. In a. press, a plurality of slides on one side of the bed, an eccentric supporting shaft, a plurality of sets of eccentrics rotatable about said shaft, a pair of shafts parallel to and on opposite sides of the first said shaft, a plurality of sets of rocking members mounted to move upon the said pair of shafts, link connections between one of said slides and one of said sets of rocking members, link connections between the other of said slides and the other of said sets of rocking member's, eccentric strap connections between one set of said eccentrics and one set of said rocking members, eccentric strap connections between the 40 other set of eccentrics and the other set of said rocking members, means for rotating said eccentrics about the eccentric supporting shaft, a slide on the other side of the bed, means for reciproeating the last said slide, and means for selectively and variably controlling the operation of all of said slides, the reciprocating means for said slides embodying. a common prime mover, and operative connections between said prime mover and each of the slide reciprocating means.

RUDOLPH w. GLASNER.