US1880873A - Press - Google Patents

Description

l J. DERRY Oct. 4, 1932.

PRESS 5 Sheets-Sheet Filed Oct. 4, 1928 J. DERRY Oct. 4, 1932.

PRESS INvlN-Jrmv J. DERRY Oct. 4, 1932.

PRESS Filed 001;. 4. 1928 -Sheets-Sheet INvEN+nvz i T7 by MLQRCtZ-b .wul

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Patented Oct. 4, 1932 unirse sTA'rss PATENT, clerics JASPER DERBY, E MEDEOED, MASSACHUSETTS, AssnsfNoi-t To ANDREW TEEKELSEN,

0E NEWTON, MASSACHUSETTS PRESS Application filed October 4, 1928. Serial No. 310,340.

This invention has for its primary object to provide a mechanically operated press Whichis capable of performing operations for-which hydraulic presses have heretofore been required. The advantages of mechanical presses, as compared to hydraulic presses, from the standpoint of economy,` compactness, convenience, and Speed of operation, have long been recognized 'but their practical utility and availability have been limited to certain classes of work. For the ap-y plication of heavy pressure to other classes of work, as where it is necessary to exert a fixed predetermined pressure upon pieces of work of varying sizes or in molds of varying thickness, or where it is necessary to maintain a constant pressure upon the work under volumetric changes in the latter, or where it is necessary to exert a substantial pressure throughout a stroke of substantial length, or where it is necessary to hold the work under a relatively light pressure for a time and thereafter apply the full pres-v sure, practical considerations have hereto# fore necessitated the use of hydraulic presses.

Such presses, however, with their accumulators and other accessories, are expensive to install and operate, are troublesome to maintain in working order, and are cumbersome and require undue space for theirnaccommodation inthe plant.

The present invention has, therefore, for an object to provide a compact and wholly mechanical press wherein the closing movemovedmore slowly and with greater forcevr until the predetermined pressure has been reached whereupon their relative movement is automatically stopped andsaid pressure maintained, to provide mechanism for automatically stopping the opening movement of the press elements when they have been separated by a predetermined but variable amount, to provide means wherebyy the predetermined pressure'exerted upon the work can be conveniently adjusted and varied in accordance with the requirements, to provide. means for measuring and indicating the amounteof the pressure` exerted,to provide means whereby the operationof the press can be manually aswell as automatically controlled, and to provide meanswhereby a part only of the predetermined pressure may be applied to the work, the press automatically stopped, and the full amount of said pressure thereafter applied.

While, as above `pointed out, the invention, f considered in its more specific aspect, has for its primary objectv to adapt a mechanically operated press to the work of a hydraulic or other iluid pressure operated press, in its broader aspect the invention has for an 0bject to provide a press wherein the movements of the press elements are automatically and variably controlled as above mentioned irrespective ofthe particular means or motive power employed to move them. I

rlhe 'foregoing and other objects of the invention, together with means whereby the lat-k ter may be carried into effect, will best be understoodY from the following description of a preferred embodiment thereof Aillustrated in theaccompanying drawings. It will be recognized,y however, that the particular construction and adaptation described and shown have been chosen for purposes of exemplifica tion merely, and that the invention, as defined by l the claims hereunto appended,` may be otherwise embodied without ldeparting from the spirit and scope thereof.

In said drawings: Y Y g Fig. l is a front elevation of the press em. bodying the invention. I

Fig. 2 is a sidey elevation, partly broken away; I

Fig. 3 is a Vplan view, partly broken away, Y as viewed from the line 3 3, Fig. l.

Fig. l is a horizontal section, taken substantially on the line 1 4, Fig. l, of the variable power transmitting mechanism. f

Fig. 8 is an enlarged detail elevation of the..

pressure indicating mechanism.

The relatively movable press elements'com-l prise a bed 15 and a ram 16 which may carry suitable complementary dies `17 or other de.,-v vices in accordance with the nature' of the work to be performed by the press.

upright posts or'rods 18 to which it is se? cured in any suitable manner, as bymeans of Ynuts 19. The post or rods 18 are guided for vertical longitudinal movement in suit- 'able bearings 2O in the frame 14 and normally rest attheir lower ends on'abutments 21 provided at the base of said frame. Surrounding the posts or rods 18 below the'bearings 20 are heavy coil springs 22' which are interposed between upper and lower collars, .23

and 24V respectively, loose on saidposts but, together with the springs 22,Xheld in a predetermined position `thereon by nuts 25. The

position of the spring and collar assembly Von each rod,`as`determined by the adjustment of the corresponding nuts .25, is such that,

when the posts rest upon the abutments 21, a

limited clearance, indicated at 26 in Fig. 1, is provided between the upper collars 23 and the lower faces of the bearings 20. -With this arrangement itwill be seen thatwhen the press elements approach one another, so as to engage the work therebetween at opposite sides,

continued movement of the ram toward the bed will cause the' latter, together withtheA y posts`118,to be lifted until the lost motion provided by the clearance 26 is taken up, and that thereafter the pressure of the ram against the work. and bed will be transmitted to the springs 22 -which will yield to permit further movementofthe bed and ydisplacement of the posts to an extent determined by the pressure applied andi consequent compression of the springs. n' r Y The ram 16 is carried by aV double rack 27 guided inthe lframe 14 and engaged Vat opposite sides by pinions 28 fast on parallel shafts 29 journalled in the frame and having also;V

fast thereon intermesh'ing gears30. 'One of i the gears 30 meshes with afpinion 31 l fast on a shaft 32 journalled in the' frame and having fast thereon a gear 33. The gear 33 meshes with a pinion 34 fast ona shaft 35 j ournalled A in the frame and having fast ythereon a gear 36. The-gear36meshes with a pinion 37yfast on ya shaft 38 which is journalled in a gear casing 39 carried ,by the frame.l Theshaft 38,`has 'fast'thereon a wormgearl 40` which y T meshes with a worin 41 on ar shaft 42' likewise journalled ingear casing 39.

The bed 15 is supportedV by four parallelY The mechanism last described constitutes a train of powerful and non-reversible speed reducing gearing by whichV is applied to the ram 16 the power of an electric or other motor 43 supported upon the base of the frame, the power of said motor being transmitted to saidgearing through variable-speed transmission mechanism which will now bejdescribed.y

Referring particularly to Figs. Briand 4, the

shaft 44 of the motor 43 has fast thereon a pinion 45 which meshes Vat one side with a gear 46 normally'loose on theworm shaft 42k and atthe other with a pinion 47 fast'on aV counter-shaft 48 journalled in a bearing on the frame and having fast thereon a gear 49 which meshes with a gear 50 also normally loose on the shaft 4,2. YFast on the worm shaft 42 Vis a pinion 51 which meshes with a gear 52 Y normally loose on a second counter-shaft 53 journalled in suitable bearings on the frame and having fast thereon a -pinion 54 which meshes with the gear 46.

VThe gears 46, 50 and 52 are adapted to be connected with their respective shafts for rotation ytherewith'by clutches which may be of any suitable type but which preferably are ofthe internal expanding type.` Said clutches,-asshown, are all substantially alike, and description of one, shown in detail in Fig. 5, will suiice for all. As shown in said figure andin Fig..4, each of said gears is,

formed in one Vfacewith an annular groove 55 in ywhich' islocatedaband 56 having spaced, inwardly-turned ends 59. The band 56 is retained within the groove 55 by a collar 57 keyed to the shaft and having an arcuate flange 58eXten`ding into the groove 55k within the band .56,"said flange having spaced ends between whichare receivedth'e inturned ends 59- ofthe band. Saidband normallyffloats. loosely within the groove 55 but may be ev-` panded into-close engagement with the outer' wall thereof by rmeans of a cam 60l operating between the ends 59 of the band, said cam being carried byY a shaft 61 journalled in the collar 57 and having at its outer end an arm 62 vcarrying a camfollower 63. Expansion ofthe band '56 serves to clutch the gear to the collar 57, and consequently to the shaft, by vfrictional engagement of its kouter surface with the outerwall of the groove 55 and by positive engagement of the ends 59 thereofwith the cam 60 andthe ends of the flange 58. The several clutchesA for connecting the gears 46, 50 and 52 'to their respective shafts.

are severally operated by annular. cam members mounted `to slidelongitudinally of the shafts and cooperating with the respective cam followers 63. The cam member 64 forVv ducedV hub portion 65 of the corresponding collar 57 ,"said ring having fbevelled edges separated by a short cylindrical peripheral surface, whereby when said ring is moved into the position shown in Fig. 4 the clutch will be closed, and when moved longitudinally out of said position the clutch will be released. Said cam member is moved longitudinally by a sliding key 66 guided in a slot 67 in. the shaft 53 and having an angular end 68 working in a slot 69 in the hub portion 65 and engag-ing an internal'annular groove 7 0 in the cam member. At its opposite end the -key 66 is secured, as by a screw 71, to a collar 72 slidably mounted on the shaft 53 and engaged by one arm of a double-armed clutch fork 73 (see also Figs. 1 and 2).

For operating the clutches for connecting the gears 46 and 50 with the shaft 42, there is provided a hub 74 slidably mounted on the abutting hub portions of the corresponding collars 57 and operated by the other arm of the clutch fork 73. Said hub 74 is provided with an annular projection 75 constituting a cam member similar in form to the cam member 64 and cooperating with the cam follower 63 which operates the clutch for controlling the gear 46, and with a second similar cam -projection 76 (which, however, has only one bevelled face) adapted to cooperate with the cam follower 63 which operates the clutch for controlling the gear 50.

The several cam members 64, 75 Vand 76 areoperated simultaneously, and in such manner as to produce the results hereinafter referredV to, through the clutch fork 73, by a shipper rod 77 slidably mounted lfor longitudinal movement in the frame and to which the hub 7 8 (Fig. 1) of said clutch fork is secured. The arrangement is such that when the shipper rod 77 is in its eXtreme position toward the left, as shown in Fig. 1, the parts will be in the position shown in Figs. 3 and ,4, and the gear 52 will be clutched to the shaft 53. When the shipper rod is moved toward the right from the position shown, the clutch controlling the gear 52 will be released and that controlling the gear 46 simultaneously closed, thereby releasing the gear 52 from the countershaft 53 and clutching the gear 46 to the worm shaft 42. Further movement of the shipper rod 7 7 toward the right first causes it to occupy a neutral position in which all of the clutches are disengaged, and thereafter causes the cam member7 6 to close its respec tive clutch to clutch the gear 50 to the worm shaft 42, this `being the extreme position of the shipper rod toward the right.

The shipper rod 77 vmay be manually operated as above described by a hand lever 79 pivoted at 80 to a bracket 81 secured to the frame and having at its end a ball and socket connection with a collar 82 secured to said shipper rod.

The shipper rod 77 isr also automatically operated by a vertically disposed controller rod 83 guided for longitudinal movementat its lower end in a bearing 84at the base of the frame and also slidably engaging. a bracket 85 carried by the ram16 and a similar bracket 86 secured, as by a set .screw 86a (Figs. 1 and 8) to one of the posts 18. At its lower end the controller rod 83 is formed with rack teeth 87 `which engage a pinion 88 rotatably mounted in the frame. The pini ion 88 has secured thereto'or formed integral therewith a gear segment 89 which meshes with a pinion 90 fast on a shaft 91 suitably journalled in the frame and extendingrear# wardly thereof. Adjacent" its rear endthel lar 4 is adjustably secured to said rodby a manuallyoperable clamping screw 7 and is varranged vbeneath the bracket 85 for engagement by the latter when the ram 16 descends.

The collar 5 is arranged above the bracket 86 for engagement thereby when theN corresponding post 18 moves upwardly under the yielding action of the springs 22. Said collar 5 is formed withan extended hub portion 8 (see Fig. 6) in adjustable threaded engagement with a second collar 9 secured to the rod 83 by a set 'screw 10. The collar 6 is secured tothe rod 83 by a setscrewv-lOl and is arranged forengagement by an arm `102 carried by the adjacent collar 23 when the bed moves upwardlyto take up the lost motion` afforded by the clearance-26.

The Voperation of a machine as thus far described is as follows: In Figs. 1 and 2 the ram 16 is shown in the lowest position provided for by the adjustments illustrated. ToV

start the press, after the insertion of the work between the dies 17, the hand lever 79 is moved into its extreme position toward the right, Fig. 1, thereby moving the shipper rod 77 into its extreme position toward the left. rlhis causes the gear 52 to be clutched to the shaft 53, as above explained, 'whereupon the worm shaft 42 will be driven from the motor 43 at relatively high speed throughthe pinion 45, gear 46 (which at this time is loosef on the shaft '42), pinion 54, gear 52, and pinion 51. The ram ywill thereupon be moved upwardly at relatively high speed through the reduction gearing above `described until the dies 17 close upon the work. Thereupon the movementof the ram willbe'transmitted through the work to the bed 15, and the latter will be lifted slightly, carrying with it the posts 18, until the lost motion provided by the clearance 26 has been taken up. This movement of the bed and posts causes the arm 102 to engage the collar l6,'lifting 'the controller rodi-83 whichpthrough the connections described, moves the shipper -rod 77 intoits rst positionV toward the right, causing lthe gear 52 to be 4unclutched from the countershaft 53 and the gear 46 to be clutched tothe worm shaft y42. The latterl shaft is thereupon driven from the motor 43, in the same direction but at a relatively low speed, through the pinion and gear 46. The ram 16 is thereupon given a furtherupward movement at relatively low' speed to exert upon thework a gradually increasingpressure as the springs 22 yield and are compressed, this Vbeing accompanied by a further upward movement'of the bed 15 and posts 18, as heretofore explained, When the predetermined limit of. this pressure has been reached, the bracket 86 engages the'collar 5, resulting in a further movement of the shipper 77 toward the right into neutral position, thereby stopping the press. The work is `thereupon resiliently held under the predetermined pressure Vby the springs 22 which, in case of any shrinkage of the work, can expand slightly to 'exert a followup pressure thereon.A ToV` ,release the pressure and separate the press elements, the hand lever 7 9 `is moved toward,

' -bracket`85`engages the collar 4, whereupon the controller rod 83 is moved downwardly, the shipper rod 77 moved toward the left into neutral position, and the` press again stopped.

It will be observed that in the foregoing operations the upward movement of the ram is controlled entirely bythe engagement of the press elements with the work, being rapid- `ly closed upon the work and thereafter moved .toward one another at slower speed kwith greater force until the predetermined pressure has been exerted, whereupon their move- 4 ment is automatically stopped and the pressure maintained irrespective vof any subsequent volumetric changes in the work. It will Atherefore be seen that the press automatically adapts itself to work of varying sizes and exerts the predetermined pressure thereon irrespective of its size or character.`

- The amount of this pressure can-be varied Vaccordingto the requirements by adjustment of the collar 5, which determines the extent to which the springs 22 are compressed,

and the consequent amount of vertical displacement ofthe posts 18, before the press is stopped; It willv also be seen that theamount of'separation of the press elements is automatically determinedby engagement ofthe braketjv85 with thexcollar4 and may there-,

fore be varied in'accordance with the requirements by adjustment of i said-collar on the rod 83.. v i i In certain classesof work it is sometimes necessary or desirable-to exert upon the work a part only of the predetermined pressure for which the machine is adjusted, to stop the machine for a periodto let the work set, and

thereafter to apply the full predeterminedr tion, the press will be automatically stopped before exerting the full predetermined pressure upon the work, after/which said stop may be manually withdrawn and the press again started, by operation of lthe hand lever 79, to exert its full pressure, 'being again a utomatically stopped byfengagement vof the bracket 86 with the collar 5 when said pressure is'reached.

vIn accordance with onefeature of the invention, means are provided for indica-ting the pressure 'exerted by the press upon the work., As shown most clearly in Fig. 8, the indicating means comprises a dial plate 107 secured to the bracket 86 and having a scale which may be'graduated in tons, thousands of pounds, or other convenient units. Journalled in the dial plate 107 is an arbor 108 carrying at one end a pointer 109l movable over the scale on said dial plate. Secured to the opposite end of the arbor 108 is a. pinion 110 which cooperates with a rack bar-111 guided in an opening in the bracket 86. Thelower endof therack bar 111 is slidably received in yan openingin a boss 112 on the frame 14and is provided beneath said boss.

with an adjustable stop nut 113 whereby the indicator may be calibrated, as hereinafter] sion of the springs 22 'and consequent upward movement of the bed A15 and posts 18, may be indicated on the dial 107 by the pointer V109 due to the movement of the bracket 86 relative to the frame 14. lVhen the press ele-A ments are fully separated,- as shown in Figs. 1 and 2, the rack bar 111 isi-held by the spring '114 in the position shown'in Fig. 8, the stop nut .113 being so adjusted that when the bed' has been moved upwardly to ay suiiicient eX- tent to take up the lostmotion provided by the clearance26, a pressure corresponding to the weight of the bed and its connected posts will be indicated by the pointer 109 on the dial 107. Thereafter, the pressure :due to the yielding of the springs 22and accompanied by a further upward movement oi the bed, will cause a further movement oi the pointer over the dial to indicate such additional pressure.

Having thus described my invention, I claim: A i Y 1. In a press, the combination with relatively movable press elements, of, an element subjected to thepressure exerted between said press elements and displaceable thereby amounts varying with the amount of said pressure, means for relatively moving said elements toward one another comprising a rack carried by one of. sai-d elements, a train of speed reducing gearing, asource of power, and variable-speed transmission mechanism for transmitting said power'for moving said elements, and means actuated by acpredetermined movement of said displaceable element for controlling said moving means and stopping the relative movement of said press elements thereby, said parts having provision for varyingthe movement of said displaceable element required to actuate said stopping means. v

2. In a press, thecombination with rela; tively movable press elements, of means for. resiliently supporting one osaid elements against the pressure exerted between them, oit means for relatively moving' said elements toward one another at variable speed and with inversely varying power, comprising4 a train of yspeed reducing gearing,- a source of power andptransmission mechanism for transmitting said vpower, through said gearing to said elements and means, automatically controlled by the positions of said elementsk with respect to work therebetween, for controlling'said moving means to cause theA latter to move said elements toward one another atrelatively high speed and low power until theylengage the work at opposite sides and `thereafter `at reduced speed and increased power.

3.` Ina press, the combination with relatively movable press elements, of means for resiliently supporting one of said elements against the pressure exerted between them, of power mechanism including a raclr carried by vone of said elements and changespeed gearingfor relatively moving said elements toward one another at variable speed and` with inversely varying power, and means, automatically controlled by the positions of said elements with respect to work therebetween, for controlling Vsaid mechanism to cause the latter to movesaid elements toward one anotherA at relatively high speed and low power. until they en:- gage the work at opposite sides land thereafter at reduced speed and increased power.

4. In a press, the combination with relatively movable press elements'one'oic which is arranged tohave a limited llost motionv undertheinluence of pressure exerted between them, `ofr means for relatively moving said elements toward one anotherrat variablev speed and with inversely varying power, and means, automatically controlled by the taking up of said lost motion when said elements are brought together upon the work, for controlling said moving means to cause Jche latter to move said elements toward one another at relatively high speed and low power until they engage the work at opposite sides and thereafter at reduced speed and increased power.

5,. In a press, the combination with relatively movable press elements, of means for resiliently supporting one of said elements against the pressure exerted between them, said last named element and its .supporting means having provision for a limited'. lost motion, means for relatively moving said elements toward one another at variable, speed and with inversely varying power, and means operatively connected with' said resiliently supported element 'for controlling said moving means, said controlling means being actuated by said element when said lost motion is taken up to reduce the speed of operation of said moving means, and being further actuated by said element when said supporting means yields to stop said moving means.

c 6. In a press, in combination, a bed, a ram, mechanism for moving said ram toward said bed, springs for supporting said bed against the 'pressure of said ram, said parts beingV larranged to permit a limited lost motion of said bed, a source of power, variable speed transmission mechanism for connecting said first named mechanism with said source otV power, a controller for said transmission mechanism having high and low speed positions .anda neutral position wherein said mechanism is inoperative to transmit power, and operative connections betweensaid bed and controller for moving the latter from high to low speed position when said lost motion is taken up and for moving the same into neutral position when said springs yield.

7. In a press, in combination, a bed, a ram, springs for supporting'said bed againstthe pressure of said ram, mechanism for moving said ram toward and away from said bed, comprising a raclr'carried by said ram, a train of speed reducing gearing, a source ot' power, y mechanism for transmitting said power through said gearing to move said ram, a controller movable Vto disengage said trans- `mission mechanism and thereby stop the movement of said ram', and cooperating stops and variable-speed transmission` supported bed, a ram, means for moving said ram toward and from-saidbed, comprising a rack carriedv by said ram, a train of speed reducing gearing, a sourceot power and variable speed transmission mechanism for transmitting said power through said gearing to move said ram and a controller operatively connected with both said ram and said bed for controlling said moving means and stopping the movement of said ram upon 'a predetermined movement of either of said elements. 9. In a. press, in combination,a bed, 'a ram, springs for supporting said bed against the pressure of-said ram, mechanisml for operating said. ram, comprising a rack carried by said ram,-a train of speed reducing gearing, aV source of power, andvariable-speed transmission mechanism for transmitting said power through said gearing to movesaidram, al controller for said mechanism having a neutral position wherein said mechanismV is inoperative to move said ram and positions on opposite sides of said neutral position wherein said. mechanism is operative to move said ram toward and away from said bed, a connection between said bed and controller for moving the latter from-one of its operative positions into its neutralposition when said springs and Vbed yield under the pressure exerted thereagainst by said ram, and a connection between said ram and controller for moving the latter VfromV the other of its operative positions into its neutral position when said ram has been moved a predetermined position away from said bed. Y l 10,. In a press, incombination,relatively movable press elements, means for relatively moving said elements toward and away from one another, comprising a train ot speed-reducing gearing, a source of power, and variable speed transmission mechanism transmitting said power for relatively moving said elements, and a movable controller for said means yoperatively connected with both of said elements.

`1l. In a press, in combination, relatively movable press elements, mechanism tor relatively moving said elements toward and -away from one another, comprising a rack carried by one of said elements,ra train ot speed reducing gearing, and a source otpower, variable transmission mechanism for connecting said first named mechanism with said source of power and disconnecting'the same therefrom, and a movable controller'member for said transmission mechanism operatively connected with both of` said elements. k12. In a press, in combination, relatively movable press elements,lmeans for relatively movingsaid elements toward and away from one another comprising a rack carriedby `one of saidelements, a'train of speed reducing gearing, a vsource of power, and yvariablespeed Vtransmission mechanism for transmitting said'ipower through said gearing'to'movev ducing gearing, a source of power, and variable transmission mechanism for connecting said first named mechanism with said source of power and dlsconnectmg' the same there- `from, a shipperrod for controlling said transmission mechanismyand a controller, rod operatively connected with both of said press elements for operating said shipper rod.

14. .In a press, inf combination, relatively movable press elements, means 'for relatively moving -said elements toward and away from one another comprising a rack carried by one lotjfsaid elements, a train of speed reducing gearing, a. source of power, and variablespeed transmission mechanism forV transmitting said power for moving said elements, manually operable Ameans Ltor-controlling said moving means, and identical means operatively 4connected withboth of said press elements for automatically-operating said controlling means. l f A l Y 15.In a press, in combinatiom relatively movable'press elements, means for relatively moving said elements ktoward one another comprising a rack carried vby one of saidelements,a train of speed reducing gearing, a

Vsource of power, and variable-speed transmission mechanism for transmitting said power `for moving said elements, automatic means controlled by the pressure exerted betweenV said elements for. stopping their relative movement, VandfmeansV associated with said. automatic Vmeans for rendering the latter operative to stopsaidv movement at any one of a plurality of' predetermined pressures.

16. In'a2press,'in combination, relatively movable press elements, means for relatively moving said elements toward one another, an element subjected to the pressure exerted between said press'v elementsjand displaceable thereby amounts varying with the amount of said pressure, a controller member movable to stop the movement of said elements, a stop carried by said controller member, Va stop associated with'said displaceable elementpand cooperating with said rst named stop to move said controller memberwhen saiddis- Y placeable member `has been displaced a ypredetermined amount, and a third manually operated stop associated with one of said aforementioned stops and operable to vary their position of operative engagement and the consequent displacement of said displaceable member required to move said controller member.

17. In a press, the combination of a bed, a ram, springs for supporting said bed against the pressure of said ram, mechanism for moving said ram toward and away from said bed, comprising a rack carried by said ram, a train of speed reducing gearing, a source ol power, and variable speed-transmission mechanism for transmitting said power through said gearing to move said ram, a shipper rod for manually controlling said transmission mechanism movable into high and low forward speed positions, neutral, and reverse speed position, and a hand lever for moving said shipper rod into said positions.

18. In a press, the combination of a bed, a ram, springs for supporting said bed against the pressure of said ram, mechanism for moving said ram toward and away from said bed, comprising a rack carried by said ram, a train or' speed reducing gearing, a source of power, and variable speed-transmission mechanism for transmitting said power through said gearing to move said ram, a shipper rod for manually controlling said transmission mechanism movable into high and low forward speed positions, neutral, and reverse speed position, a hand lever Jfor moving said shipper rod into said positions, and al controller rod for automatically moving said shipper rod into said respective` positions.

19. In a press, the combination of a bed, a ram, springs for supporting said bed against the pressure of saidram, mechanism for moving said ram toward and away from said bed, comprising a rack carried by said ram, a train of speed reducing gearing, a source of power, and variable speed-transmission mechanism for transmitting said power through said gearing to move said ram, a shipper rod for manually controlling said transmission mechanism movable into high and low forward speed positions, neutral, and reverse speed position, a hand lever for moving said shipper rod into said positions, a controller rod for automatically moving said shipper rod into said respective positions and having operative connections with said bed for moving said controller rod romhigh to low speed position, and for moving the same into neutral position when said springs yield, and having operative connections with said ram for moving the controller rod from reverse to neutral position. Y

In testimony whereof I aiiX my signature.

JASPER DERBY.

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