US2004427A - Grinding machine - Google Patents

Description

C. BOOTH GRINDING MACHINE Filed July 3, 1931 5 'skestsvsheet l Jmnentor Gttomeg June 11, 1935 l mm Pa 5 m -Sheet 2 c BOOTH GRINDING MACHINE Filed July 1931 June 11, 1935. c. BOOTH GRINDING mcnmm Filed July 3, 1931 5 heets-Sheet 3 m g m M J y W 7 j 4% d4 Snventor Giff/77%;?

(Ittomeg June 11, 1935. c. BOOTH GRINDING MACHINE Filed July 5, 1931 "5 Sheets-Sheet 5 ZSnventor IN I I.

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M W 1:.W x M a w. v 1 v, m w. 4 M i attorney Patented June 11, 1935 UNITED" STATES PATENT 2,004,427 cnmnmo MACHINE I Clement Booth, Cincinnati, Ohio, assignmto Cincinnati Grinders Incorporated, Cincinnati, Ohio, a corporation of Ohio Application July 3, 1931, Serial Nb. 548,010

26 Claims. (01. 51-403) This invention relates to improvements. in of Figure 7, certain parts being broken away to OFFICE object of the invention is the provision of grinding machines and especially to improvements in what'are commercially known as centerless grinders.

an improved substantially automatic grinding machine for grinding formed work pieces, such as grooved inner bearing races.

Another object of the invention is the provision of an improved automatic grinding machine 30 and it is to be understood that any modifications including automatic loading and ejecting mechalnism operated and controlled by hydraulic pressure.

A further object of the invention is the ,provision of improved means forloading formed work pieces, such as the bearing races above noted, into andremoving same from the throat of a centerless grinder. I

A still further object of the invention is the provision of improved individual means for inserting the work within the grinding throat and improved individual meanslfor removing same therefrom, each operating in a cyclic sequence, whereby lost time in actual production of the machine is greatly reduced. f

' Other objects and advantages of the present invention should be readily apparent by reference to the following specification considered in conjunction with the accompanying drawings may be made in the exact structural details there shown and described, within the scope of the appended claims, without departing from. or exceeding the spirit of the invention.

In the drawings: 1 Figure l is a front elevation of a centerless grinding machine embodying the improvements" of this invention.

Figure 2 is a view as seen from line 2-2 of Figure 1.

Figure 3 is a fragmentary illustration of the parts above the broken portion of Figure 2.

Figure 4 is a view transversely or that shown in Figure 2 and illustrating the relative position of the parts forming the grinding throat.

Figure 5 is a view as seen substantially from line 5-5 of Figure 2, and illustrating the insertion and positioning of the work within the grinding throat.

Figure 6 is a detail view of the pressure sleeve showing certain details of the invention.

Figure 7 is a sectional view taken substantially moreclearly illustrate the structure. Figure 9 is a sectional view taken on line 9- 9 )fFigure'l. g

Figure 10 is a diagrammatic view illustrating ,the hydraulic circuit employed in the performance of the invention and showing the several positions of the. valve for automatically effecting the different functions of the machine.

' Figure 11 is a sectional view illustrating a modification of certain parts of the invention.

Throughout the several views of the drawings similar reference characters are employed to denote the same or similar parts.

A device of this invention may comprise a bed III having rising therefrom a pedestal bearing ll supporting a spindle l2 on which is secured a pair of grinding wheels lit. The grinding wheels l3 are opposed to a pair of regulating wheels l4,- likewise mounted on a spindle I5 carried by, housing I6 secured to a slide IT. The slide l I is mounted on a second or lower slide l8 supported on ways l9 formed on the bed Ill. The slides I1 and I8 are adapted to be actuated relative to one another and relative to the bed III for which purpose clamps and 2! are provided, the' former for securing theupper slide I1 to the lower slide l8, whereby the slides are moved as a unit, and the latter for securing the lower slide I 8 to the bed I 0 whereby slide I l is moved relative to slide l8.

The operative faces of the wheels I3 and it are spaced from one another to provide a grinding throat in which the work 22 is positioned for operation thereon. The parts are so related as to simultaneously grind the'bearing grooves 23 of a pair of individual races or work pieces 22, or for grinding simultaneously the grooves of a double antifriction bearing which is frequently v employed in various industries. In order to properly support the work piece or pieces in simultaneous engagement with the grinding and regulating wheels, the lower slide l8'is provided on its inner end with a supportingblock 24 supporting a work rest blade 25 having a pair of contact or support portions 28 positioned while in operation within the grooves being ground; as seen in Figures 4 and 5. The said supporting portions 26 are positioned beyond the center of the throat and nearer the grinding wheel, being further provided with an inclined operative portion as at 21 inclining toward the regulating wheels and with the surface of said wheels forming a work receiving trough.

The work is initially positioned within a magazine or feed chute 28 extending along the forward portion of the machine and inclining. toward the entrant side of the grinding throat so that the work is brought to the said grinding throat by gravity. The magazine or trough 28 terminates in a platform 29 and the magazine has extending over the lower end thereof a guide strip 36 spaced sufiiciently from the top of the work piece to permit its free movement under the influence of gravity, but preventing any sidewise tilting of the work for a reason which will appear later.

The platform 29 is secured to a bracket or stand 3| secured as by bolts or other fastening means 32 to block 24 at the forward end of the lower slide l8. The bracket 3| is formed with a cylinder 33 into which is pressed a liner or bushing 33A encircling a sleeve 34 adapted to be slidably actuated therethrough. The sleeve 34 in turn encloses a plunger 35 having a guldeway 36 formed therein which'receives the end 31 of a screw 38 whereby relative oscillatory movement between the plunger 35 and sleeve 34 is'prohibited. The plunger and sleeve, when in a retracted position, are clear of the magazine or chute 28 so that the lowermost work pieces may position themselves on the platform 29. Further, the diameter of the plunger 35 is such as to freely enter the bore within the work pieces 22 in order to pick up the work pieces from the platform 29.

The sleeve 34 has extending from it a hollow piston rod 39 to which is secured or integrally formed therewith a piston 40 enclosed within an hydraulic cylinder 4|. The cylinder 4| is closed at its forward end by a cylinder head 42 which in turn forms a flange 43 through which cap screws, or the like, extend for fasteningthe cylinder 4| to the end of the cylinder 33. other end of the cylinder 4| is closed by a cylinder head 44 andhas secured thereto one end of a conduit 45. The piston 48 is provided with a hollow interior which is closed at one end by a cap 46 into which one terminus of a conduit 41 is secured. Enclosed within the piston 48 is a second piston 48 on the end of a piston rod 49 extending from the plunger 35 through the hollow piston rod 39. A port 59 is formed in the end of the piston 49 opposite to that to which the cap 46 is secured and the hydraulic cylinder 4| is provided with a conduit 5| at the end. adjacent the cylinder head 42.

The operation of the parts just described is as follows: A pair of bearing races 22 are positioned on the platform 29 whereupon the piston 48 is actuated relative to the piston 48 for inserting the end of plunger 35 within the bore in the races. Hydraulic pressure is then introduced through the conduit 45 for effecting a movement of pistons 48 and 48' to carry the work pieces from the position outside the grinding throat to a point within the grinding throat.

.The sleeve 34 has formed in its outer surface a cam slot 52 in which is positioned a pin 53 extending from the inner wall of the cylinder 33. The slot 52 is provided with a pair'of parallel portions 54 and 55, being connected at opposite ends by inclined portions 56 and 5'|. The slot extends through 90 degrees of the surface of the sleeve 34, as shown most clearly in Figure 6. The plunger 35, as seen in Figure 5, is provided with a cutaway portion terminating in the line 58 as shown therein.

When the sleeve and plungerare in a retracted position, the cut-away portion is positioned lat- The erally of the axial center of the plunger so that the work contacts with the outerperiphery of the plunger, as seen in full lines in Figure 5. At this time the pin 53 is in the lower parallel slot 55 as seen in Figure 6. As the parts are advanced, as above described, the pin advances to the inclined portion 51, whereupon continued formed therein. From this it will be seen that a during the actual grinding operations the work is supported only on the work rest blades as is customary centerless grinding practice. The position of the parts during the grinding operation is illustrated in dotted lines in Figure 5.

- At the other end of the grinding throat the block 24 at the forward end of the slide l8 has secured thereto a bracket 59 split as at 60 and receiving within a bore a stop block 6| against which the adjacent face of the work pieces is held by hydraulic pressure continuing against the piston 40 causing the end of the sleeve 34 to hold the work for rotation in a definite vertical plane. This is necessary to insure the rotation of the work in a plane parallel to the finished faces thereof to enable the grooves to be properly formed therein.

The work is fed into the grinding wheels" automatically by the mechanism particularly illustrated in Figures 1, 7 and 8. This mechanism includes a housing 62 having extending therefrom a bracket 63 whereby it is secured to an extended flange portion 64 of the bed Ill. The housing 62 has journaled therein the reduced end 65 of an adjusting screw 66 in threaded engagement with a nut 61 carried by the upper slide IT. The screw 66 has secured to its outer end a pilot or hand wheel 68 whereby it may be rotated for initially adjusting the parts and setting the grinding throat. The housing 62 is formed in- .teriorly thereof with a bearing 69 in which is "ill and are pivotally secured at their outer ends to lugs 14 of crank 15 pivoted as at 16 to the walls of the housing 62. The lower end of the arm 11 of the crank 15 carries an adjustable roller 18 received in a cam groove I9 of cam 80. This cam 80 is secured for movement with a cam shaft 8| journaled in bearing 82 of the housing 62 which is driven by a worm Wheel 83 secured thereto. The worm wheel in turn is driven through a worm 84 on'worm shaft 85 geared at 86 to a prime mover secured to the housing 62.

The cam groove 19 is provided with a portign 88 from which an outwardly abruptly flaring portion 89 continues for rapidly shifting the roller 18 from the center of the shaft 8| to thereby rapidly advance the regulating wheel unit to the grinding position. The groove then continues as at 99 at a uniform rate for effecting the relative feed between the work pieces and the grinding wheels and said portion terminates in is as follows. r by means to be described later, .1nto the upper "end of the cylinder I05 causing a descent of the piston I06, as seen in Figure 2, which carries with it the arms 109 and H0. As the arms descend lating wheel unit from agrinding position to a position to permit the withdrawal of the finished work pieces from the grinding throat and the insertion therein of unfinished work pieces.

Secured on the cam shaft ill for movement therewith is a second cam 93 having a cam slot 94 formed therein and receiving a'roll'er 95 secured to an arm 96 intermediatefits ends. One end of the 'arm 96 is pivoted at 91 to the housing 62 and the other end isprovided with an elongated slot 98 receiving a pin 99 extending from a valve stem I00. The valve stem" I is integral with a valve I IN axially shiftable through avalve bushing I02 pressed into housing or casing I03. The valve operating 'cam 93 by rotation with the cam80 effects a shifting of the valve in timed sequence with the movement of the regulating wheel toward and from thegrinding, wheel.

After the work has been reduced .to size and to eject the said work from the grinding throat the following mechanism-is resorted to. Secured to the block 24 at the rear end thereof, as by bolts I04, is a cylinder I containing piston I00 adapted to bereciprocated through the said cylinder. Extending from the piston I 00 is a piston rod I01 having. secured to its upper or free end a beam I08 from which depend ejector arms I09 and H0. The arms IIO have yieidably pivotally secured at-their free ends fingers III and II2. The said fingers have respectively extending therefrom tangs or lugs H3 and II 4 adapted to engage pins H5 and H6 to limit their movement under yielding pressure in a given direction. As seen in Figure 2, the said fingers extend toward one another and lie within the space defined by adjacent sides of the arms I09 and H0.

Secured to the regulating wheel housing I3 is a bracket II1 from which bracket II8 extends havingrising therefrom posts H9 and. I20. The posts I I9 and I are each provided with a holding finger I22 and I23,-similar-to the carrying fingers III and M2, the said fingers being normally yieldably rotated about their pivotal mountings to maintain their lugs I24 in engagement with studs I25-so that the operative portion of the fingers lie within the space between opposed faces of the posts H9 and I 20. Extending from the bracket is a chute I26 adapted to receive the work pieces when discharged from the grinding throat, the said work pieces being deflected into the chute I26 by a deflector plate I21 secured to and carried by the posts H9 and I20.

The operation of the discharging mechanism Hydraulic pressure is introduced,

the fingers III and H2 engage'the outer opposite peripheries of the work pieces causing same to be deflected or actuated in an outward direction until the bore of the work piece is reached whereupon the yielding means inserts the operative portion of the fingers within the interior of the work. Hydraulic pressure is now introduced into the bottom of the cylinder I 05 for effecting a raising of the piston I 06 in said cylinder whereupon the said work pieces are carried out of the grinding throat by the said carrying fingers III and I I2. The work pieces continue in an upward 3 direction between the posts 9 and I20 where the work pieces effect a similar actuation of the holding fingers I22 and I23. The next downward a suitable receptacle, not shown, placed in proper position toreceive same.

The hydraulic circuit for "operating the loading and ejecting mechanisms is diagrammatically iilustrated in Figure 10, as are the several operative positions of the valve. The valve body I0'I is provided with cannelures I28, I29, I30 and I3I foreffecting the several operative positions. The several positions are indicated in Figure 10 at I32, I33, I34, I and I36. The valve is adjusted to this position by the cam groove 94 which has a concentric portion I31 of a considerable part of the cycle whichrepresents the time of the grinding anddwell at which time there is no relative movement of the valve and hydraulically actuated parts; The portion I31 of the cam groove 94 terminates in the portion I 38 which effects the shifting of the valve IOI to the second position I33'.'.Portions I39, I40 and MI likewise effect the remaining positions of the valve for properly cyclically operating the loading and ejecting mechanisms.

"A hydraulic medium contained withina tank or sump I42 is circulated through the system by a pump I43 being discharged from the pump into pressure line I44 from which branch lines I45, I46-and I41 extend. As shown in Figure 10, with the valve in the position A the hydraulic pressure from branch conduits I45 and I41 is blocked bythe valve IOI', while the pressure from branch I46 passes through the cannelure I30 the conduit I40 to the intake conduit 5|, port for retracting the'inner piston. 48 and withdrawing the plunger 35 from the interior of the work.

The hydraulic medium in the piston cylinder 4I ahead of piston," is exhausted through pipe 41 to' conduit I49 .to the valve I00 which directs it to the branch exhaust line I50 connecting with the main exhaust I 5I to return the medium to the tank or sump I42.

when the grinding. has been about completed the portion I H of the groove 94 shifts the valve to the position shown at .B, at which time the hydraulic pressure in branch lines I46 and I41 is blocked while the pressure in branch line I45 passes through cannelure I29 into the conduit I52 which terminatesvat the upper end of the cylinder I05 for effecting the descent of the piston I06 therein. The exhaust from the cylinder I05 is directed through conduit I 53 to the valve where the cannelure I29 connects the said conduit I53 with exhaust branch conduit I54 in turn connected with the main exhaust conduit ISI for returning the hydraulic medium to the sump or tank I42. i 7,

Further continued rotationof the cam 93 effects a shifting of the valve IN to the position C" through the portion I40 of the cam groove 94. In this position the hydraulic medium in branch pressure line I41 is blocked while the pressures in branches I45 and I46 are connected respectively for raising the piston I06 in the cylinder I05 and with the conduit I48 for, at this time, retracting both the inner piston 48 andthe outer piston cylinder 40 to the position shown in Figure-2. The exhaust ahead of the piston I06 in the cylinder I05 is by way of conduit I52 to the valve IOI where it is connected with branch exhaust conduit I55 in turn connected with the main exhaust conduit I5I. The exhaust behind the piston cylinder 40 is directed through pipe 45 to the conduit I56 which terminates at the valve WI and is connected thereby with the branch exhaust conduit I50.

The cam portion I39 next adjusts the valve to the position indicated as I35 which is the position indicated at D in the Figure 1. The pressure at this time in branch pressure line I46 is blocked, while the pressures in branch lines I41 and I45 are respectively connected through cannelure I3I with conduit I49 and pipe I50 for actuating the piston 48 relative to the piston cylinder 40 and the conduit I53 for maintaining the piston I06 in a raised position. This shifting of the piston 48 to the left, as seen in Figure 2, causes plunger 35 to pick up the next pair of work pieces to he placed within the grinding throat.

The portion I38 immediately shifts the valve to the position indicated at I34 illustrated'at E in the figure, whereupon the pressure from branch lines I45 and I4! is blocked while the pressure from branch line I46 is directed by the cannelure I30 to the conduit I56 and pipe 45 for actuating the piston cylinder 4| together with the contained piston 48 to the left, as seen in Figure 2, thereby placing the work pieces within the grinding throat.

The next adjustment of the cam 93 again brings into play the portion I31 whereupon a repetition of the cycle above described follows.

It should be noted that the above operation passes continuously through the several parts of the cycle so that the loading and ejecting mechanisms are operating substantially simultaneously thereby reducing the idle time of the machine to an absolute minimum.

It will be noted that the work pieces are held between the sleeve 34 and the block 6| during the descent of the arms I09 and III]. In order to accommodate the said arms so that the carrying fingers III and H2 are positioned within 'the bore before the pressure is released there- I6I beingheld from inadvertent d-isassociation by a nut I62 secured on the end of the sleeve extension I60. Interposed between the cup and sleeve is a coiled spring I63 abutting on opposite ends with the shoulder I64 of the sleeve and the base l65 of the cup. A key I66 may be prov-ided to maintain definite relation between the sleeve and cup so that the slots for the carrying arms and fingers will not be misaligned during operation.

What is claimed is:

1. In a grinding machine the combination of a work support, a grinding wheel adjacent the support, hydraulically actuated means for positioning a work piece on the support, and additional hydraulically actuated means for removing the work piece from the support at the conclusion of the grinding operation thereon.

2. In a grinding machine the combination of a work support, a grinding wheel adjacent the support, means for loading a work piece on the support, means for ejecting the work piece from the support at the conclusion of the grinding operation thereon, means for substantially simultaneously actuating the work loading and ejecting means, and means for synchronizing the actuation of said loading and ejecting means.

3. In a grinding machine'the combination of a work support, a grinding wheel adjacent the support, means for loading a work piece on the support, means for ejecting the work piece from the support at the conclusion of the grinding operation thereon, means for substantially simultaneously actuating the work loading and ejecting means, means for synchronizing the actuation of said loading and ejecting means, and a regulating member adjacent the work support and opposed to the grinding wheel for controlling the rotation of the work during the grinding operation thereon.

4. In a grinding machine the combination of a work support, a grinding wheel adjacent the support, means for loading a work piece on the support, means for ejecting the work piece from the support at the conclusion of the grinding operation thereon, means for substantially simultaneously actuating the work loading and ejecting means, means for synchronizing the actuation of said loading and ejecting means, a regulating member adjacent the work support and opposed to the grinding wheel for controlling the rotation of the work during the grinding operation thereon, and means for efiecting a relative feed between the work and grinding wheel.

5. In a centerless grinder for grinding the exterior surfaces of hollow work pieces the combination of a pair of opposed grinding and regulating wheels forming a grinding throat therebetween, means within the throat for supporting a work piece in simultaneous engagement with the grinding and regulating wheels, means adapted to enter the bore in the work for loading same on the support froma point outside the grinding throat, and additional means received within the bore for ejecting the work from the grinding throat. I

6. In a grinding machine the combination of a grinding wheel, a work-support adjacent the grinding wheel, means for shifting the work laterally of the grinding wheel to place same on the work support, and means for shifting the work in an angularly related direction to the loading movement for ejecting the work from the support.

7 In a grinding machine the combination of a grinding wheel, a work support adjacent the grinding wheel, means for shifting the work laterally of the grinding wheel -to place same on the work support, means for shifting the work in an angularly related direction to the loading movement for ejecting-the work from the support, and means synchronizing the actuation of the loading and ejecting means whereby the unfinished work may be mounted on the support substantially simultaneously with the removal of the finished work therefrom.

grinding wheel, a work support adjacent the grinding wheel, means for shifting the work laterally of the grinding wheelto place same on the work support, means for shifting the work in an angularly related direction to the loading movement for ejecting the work from the support, means synchronizing the actuation of the loading'and ejecting means whereby the unfinished work may be mounted on the support substantially simultaneously with the removal of the finished work therefrom, means for effecting a relative feed between the work and'grinding wheel while on the support, and means synchronizing the actuation of the feeding means and the loading and ejecting means.

9. In a centerless grinder the combination of a pair of opposed grinding and regulating wheels forming a grinding throat therebetween, a work support subtending the grinding throat, the

grinding throat having an entrant side, a magazine for conveying work pieces'to the entrant side of the grinding throat, means for moving work pieces from the entrant side of the throat onto the work rest blade within the throat, a discharge chute, and additional means for conveying work pieces from the work support to the discharge chute and automatically discharging the work from the machine. I

10. In a centerless grinder the combination of a pair of opposed grinding and regulating wheels forming a grinding throat therebetween, a work support subtending the grinding throat," the grinding throat having an entrant side, a magazine for conveying work pieces to the entrant side of the grinding throat, means for moving work pieces from the entrant side of the throat onto the work rest blade within the throat, a discharge chute, means for conveying work pieces from the work support to the discharge chute and automatically discharging the work from the machine, means for effecting an enlargement and contraction of the grinding throat to permit the insertion and removal of work therefrom,- and means synchronizing the operation of said throat actuating means with the operation of the loading and ejecting means.

11. A loading mechanism for placing work pieces on a work support the combination of a magazine, a work pick up and shifting mechanism at the base of the magazine comprising a bracket, a sleeve therein, a plunger within the sleeve adapted to enter a; bore in the work, and means for independently andsuccessively actuating the plunger and sleeve for first picking up the work and subsequently moving same from the maga-- zine to the work support.

12. A loading mechanism for 'placing workpieces on a work support the combination of a.

magazine, a work pick up and shifting mechanism at the base of the magazine comprising a bracket, a sleeve therein, a plunger within the sleeve adapted to enter a bore in the work, means for independently and successively actuating the plunger and sleeve for first picking up the work and subsequently moving same from the magazine to the work support, said means including an individual piston for the sleeve and plunger, a

' cylinder for each piston, and a hydraulic circuit,

for actuat ng the pistons relative to their'cylinders.

13. A loading mechanism for hollow cylindrical work pieces for placing same within the throat of a centerless grinder comprising a brack-. et in alignment with the grinding throat, a work rest blade within the grinding throat adapted to enter an under-cut formed portion of the work,

and sleeve successively for first picking up the work from the magazine and subsequently moving same into'the grinding throat, and means for automatically effecting a drop of the work from its'line of movement to position the work rest blade within the under-cut formed portion of the work.

14. A loading mechanism for hollow cylindrical work pieces for placing same within the throat of a centerless grinder comprising a bracket in alignment with the grinding throat, a work rest blade within the grinding throat adapted to enter an under-cut formed portion of the work, a sleeve within the bracket and operable relative thereto, a plunger adapted to enter the bore in the work,'means for actuating the plunger and sleeve successively for first picking up the work from the magazine and subsequently moving same into the grinding'throat, means for automatically effecting a drop of the work from its line of movement to position the work rest blade within the under-cut formed portion of the work, said means comprising a cam track formed in the sleeve member, and a follower carried by the bracket cooperating with the cam track.

15; In a centerless grinder for grinding formed portions of revolution in work pieces of greater dimensions than the portion to be ground the combination of opposed grinding and regulating wheels forming a grinding throat between them, the grinding throat having one end open to permit introduction of work therein, a work rest blade within the throat for engaging the work at the portion being operated upon, arblock at the other end of the grinding throat and opposed to the entrant portion thereof, means transferring the work from a point outside of the grinding throat to the work rest blade, and means holding the work against the'throat closing block to insure rotation of the work concentric with its axis.

16. In a centerless grinder the combination of a bed, a pair of opposed grinding and regulating wheels forming a. grinding throat therebetween, means for shifting one of the wheels toward and from the other including a cam, a work restblade within the grinding throat, means for loading a work piece on the blade, means for ejecting the work piece from the blade, a hydraulic circuit for actuating the said loading and ejecting means, a valve for controlling the, hydraulic circuit to efiect synchronized timed actuation of the loading and ejecting means, and a cam member for-actuating the valve.

17. In a centerless grinder the combination of a bed, a pair of opposed grinding and regulating wheels forming a. grinding throat therebetween, means for shiftingone of the wheels toward and from, the other including. a cam, a work rest blade within the grinding throat, means for loading a work piece on the blade, means for ejecting the work piece from the blade, a hydraulic circuit for actuating the said loading and ejecting-means,

a valve for controlling the hydraulic circuit to effect synchronized timed actuation of the loadtioning hollow work pieces within the throat of the centerless grinder and for ejecting same therefrom comprising a plunger adapted to enter the bore of the work piece, a piston for shifting the work piece from a point exterior of the throat to a point within the throat, means adapted to enter the bore in the work piece for ejecting the work from the throat, a second piston for operating said ejecting means, a hydraulic circuit for actuating the plunger and the two pistons, a valve controlling the circuit,'and means for shifting the valve to a plurality of positions for subsequently operating the plunger and two pistons.

. a work piece adjacent the tool, hydraulically actuated means for picking up a work piece and placing same on the work support, hydraulically" actuated means for removing the work from the support at the conclusion of the tooling operation, a single source of hydraulic pressure for operating said hydraulically controlled means, and a single valve distributing the pressure to the several hydraulic means.

21. In a machine tool organization the combination of a tool, a work support for supporting a work piece adjacent the tool, hydraulically actuated means for picking up a work piece and placing same on the work support, hydraulically actuated means for removing the work from the support at the conclusion of the tooling operation, a single source of hydraulic pressure'for operating said hydraulically controlled means, a single valve distributing the pressure to the several hydraulic means, and means for automatically shifting the valve for changing the distribution of the pressure.

22. In a machine tool organization the combination of a tool, a work support for supporting a work piece adjacent the tool, hydraulically actuated meansfor picking up a work piece and placing same on the work support, hydraulically actuated means for removing the work from the support at the conclusion of the tooling operation, a single source of, hydraulic pressure for operating said hydraulically controlled means, a single valve distributing the pressure to the several hydraulic means, and means for automatically shifting the valve for changing the distri bution of the pressure including a cam, and a pivoted lever associated with the cam having a connection with the valve. 7

23. In a machine tool organization the combination of a tool, means for supporting a work piece adjacent the tool, and hydraulically actuated means for picking up a work piece, positioning same on the supporting means, releasing it, and ejecting same from the supporting means at the conclusion of the tooling operation and including a valve having a position for each function of the hydraulic means, and automatically operated means for positioning the valve to cyclically actuate the hydraulically controlled mechanism.

24. In a machine tool organization the combination of a tool, means for supporting a work piece adjacent the tool, and hydraulically actuated means for picking up a work piece; positioning same on the supporting means, releasing it, and ejecting same from the supporting means at the conclusion of the tooling operation and in cluding a valve having a position for each function of the hydraulic means, and automatically operated means for positioning the valve to cyclically actuate the hydraulically controlled mechanism including a rotatable cam, and a pivoted lever having an operative connection with the cam and valve.

25. In a machine tool organization the combination of a tool, means for supporting a work piece adjacent the tool, and hydraulically aotuated means for picking up a work piece, positioning same on the supporting means, releasing it, and ejecting same from the supporting means at the conclusion of the tooling operation and including a valve having a position for each function of the hydraulic means, and automatically operated means for positioning the valve to cyclically actuate the hydraulically controlled mechanism including a rotatable cam, a pivoted lever having an operative connection with the cam and valve, and a magazine for supplying workpieces to the hydraulic pick up mechanism.

26. In a-machine tool organization the combination of a tool, means for supporting a work piece adjacent the tool, and hydraulically actuated means for picking up a work piece, positioning same on the supporting means, releasing it, and ejecting same from the supporting means at the conclusion of the tooling operation and including a valve having a position for each function of the hydraulic means, and automatically operated means for positioning the valve to cyclically actuate the hydraulically controlled mechanism including a rotatable cam, a pivoted lever having an operative connection with the cam and valve, a magazine for supplying work pieces to the hydraulic pick up mechanism, means for effecting a-relative feed between the tool and work while supported, and means synchronizing the feed of the tool and the cyclic operation of the work positioning and ejecting mechanism.

CLEMENT BOOTH.

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