US1871272A

US1871272A - Material handling apparatus

Info

Publication number: US1871272A
Application number: US428663A
Authority: US
Inventors: Jongedyk Ralph
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1930-02-15
Filing date: 1930-02-15
Publication date: 1932-08-09
Anticipated expiration: 1949-08-09

Description

Aug. 9, 1932. R. JONGEDYK 3 9 MATERIAL HANDLINGAPPARATUS Filed Feb; 15. 1930 4 Sheets-Sheet l I Jim/@7775)" 5142272 JONyQJy/E Aug. 9, 1932. R. JONGEDYK 1,371,272

MATERIAL HANDLING APPARATUS I Filed Feb. 15. 1950 4 Sheets-Sheet 2 16o jgzyz 5 /58 5 0 I36 A /59 ms 3 A /39 I 172M922???" fiaipiz firzyeazijr 4 Sheets-Sheet 3 R. JONGEDYK MATERIAL HANDLING APPARATUS Filed Feb. 15, 1930 Aug. 9, 1932.

1 R. JONGEDYK- I 1,87%272 MATERIAL HANDLING APPARATUS Filed Feb. 15. 1930 4 Sheets-Shegt 4 Patented Aug. 9, 1932 UNITED STATES PATENT OFFICE RALPH J'QNGEDYK, 0F HINSDALE, ILLINOIS, ASSIGUOR TO WESTERN ELECTRIC COM- PANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK MATERIAL HANDLING APPARATUS Application filed February 15, 1930. Serial No. 428,663.

ated machine press having a reci rocatory tool carrying ram, there is provi ed a hydraulically actuated apparatus which includes a plurality of feed and co-operating idle pressure rolls for advancing material to be worked by the tool in timed relation with the working strokes of the ram, and a hy-, draulic transmission s stem including low andhigh pressure flui pumps with a valve control mechanism for the system. The actuation of a treadle and connected lever mechanism permits the low pressure fluid to actuate a main valve to cause the high pressure fluid to be directed either to the press alone, the press and material advancing apparatus together, or the latter apparatus alone; depending on the setting of a manually controlled high pressure directing valve to completean operating cycle. The holding ofthetreadle mechanism in an actuated position causesconl tmuous operating cycles'as determmedby the setting of the directingvalve, when a manual- 1y operable lever mechanism is predeterlninedly postioned with respect to thetreadle 'mechanism, and in another positionpf'the' manually operable lever mechanism it acts automatically to prevent a second operating cycle when not intended, even though the treadle mechanism is heldin an actuated position. The actuation of another manually- I operable lever mechanism permits the'ramto be stopped at any point in its operating stroke and if desired it may be returned to its normal postion without completing its operating stroke, or it may after being stopped be permitted to complete the stroke.

. Other objects and advantages of this invention will more fully appear from the following detailed description, taken in connection with the accompanying drawings,

wherein I Figs. 1 and 2 are diagrammatic fragmentary side views on different scales of a hydraulically actuated machine press and one embodiment of. the control mechanism of this invention for controlling the reciprocation of the press ram and the actuation of the material advancing'apparatus, the placing of Fig. 2 immediately to the right of Fig. 1 showing the complete control mechanism;

Fig. 3 is a fragmentary elevation of the machine press showmg a supporting frame for the material advancing apparatus hinged to a bracket vertically adjustable upon the frame of the press;

Fig. 4 is a longitudinal fragmentary section through one set of the feed and cooperating idle pressure rolls for advancing the material to be worked into working position, and v Fig 5 is a diagrammatic view of the motive fluid system illustrated in Figs. 1 and 2 showing certain of the valves in operative positions different than the positions shown in Figs. 1 and 2.

M achine press and fluid pumps Referring now to the drawings in detail wherein like reference numerals indicate similariparts, particularly Fig. 1, wherein .there is illustrated fragmentarily and in diagrammatic. form, a hydraulically actuated machine press having a hydraulic cylinder 10,: a vertically/ reciprocahle ram 11 carrying a punch 12 at its lower end and connected. to a piston 13 within the cylinder 10 at its upper end. The punch 12, in the operation ofthe press, cooperates with a die 14 f carried upon. the ,bed of the :press- (not shown) to form articles from a strip of material 17 ,Which is intermittently advanced in timed relation with the working strokes of the ram 11 by means to be described hereinafter. The piston 13 is actuated by motive-fluid, for instance oil, supplied alternately jto the cylinder at opposite ends of the piston 13, through

ports

18 and 19 formed :in the upper and lower ends of the cylinder and connected by

pipes

20 and 21 to a directing valve 24 and a main control valve 25 (Fig. 2), respectively. The

motive fluid for operating the ram 11 is suphas been found suitable for employment in the control mechanism of this invention is known as an oil gear and 'is disclosed and described in Patent 1,628,603, May 10, 1927. It is to be understood that suitable accumulators may be used instead of either or both of the

pumps

26 and 27 for supplying the motive fluid.

Material advancing apparatus The apparatus for intermittently advancing the strip material 17 between the punch 12- and the die 14 in timed relation with the working strokes of the ram 11 comprises motive fluid actuated rolls 30-30 (Figs. 1 and 4) arranged at opposite sides of the punch and die 12 and 14, respectively. Referring particularly to Fig. 4 the rolls 30 each comprise a hollow cylinder 31 held in place and normally free to rotate upon a hollow spindle 32 by means of ball bearing assemblies 33 arranged at opposite ends of the roll. The spindles 32 are each supported in suitable bearings (not shown) mounted in a frame 34 (Fig. 3), one upon each side of the press, each of the frames being hinged by

pins

35 and 36 fixed to a stationary bracket 37 adjustable vertically-upon one end of a frame 38 of the press by means of a Well known type of screw and nut device 39 for the purpose of aligning the upper peripheral surface of the rolls 30 with the upper surface of the die 14 so that the strip material 17 will be correctly guided. The frames 34 are hinged for the purpose of facilitating the mounting and removal of dies and punches from-the press when changes are necessary. Upon the removal of a holding screw 40 at the opposite side of the press and the release of a coupling indicated at 41 (Fig. 3), which serves to connect the spindle 32 to a continuing spindle ortion supported in the stationary bracket 3 the frame'34 may be swung forwardly upon its

hinges

35 and 36, thus giving access to the punch and die 12 and 14, res ectively. Cooperating with each of the fee 42, which is journaled upon one end of an arm 44 (Fig. 1) which is pivoted at 45 to the hinged frame 34. Each of the rolls 42 is arranged directly above its respective roll 30 and serves to hold the strip material 17 firmly against the periphery of the. roll, the necesrolls 30 is' an idle pressure roll sarypressure being provided by a compression spring 46 acting downwardly against the arm 44 carrying the roll 42.

Within each of the hollow cylinders 31 comprising the rolls 30 is a thin walled expansible chamber 47 which surrounds and is suitably secured at opposite ends to the hollow spindle 32 between the ball hearing assemblies 33, the normal outside diameter of the chamber being slightly less than the inside of the cylinder 31 (Fig. 4). Motive fluid under suitable pressure at predetermined intervals in the operation of the press, as will be referred to hereinafter, serves to expand the chamber 47 against the interior wall of the cylinder 31, whereby upon rotary motion being imparted to the spindle 32 the feed roll 30 is similarly rotated. The motive fluid enters the chamber 47 from the hollow spindle 32 through a plurality of ports 48 formed in the wall of the spindle within the chamber, the hollow spindle being connected at one end to the motive fluid system through a pipe 51 by a suitable fluid tight slip coupling) 52 (Fig. 1) associated with the spindle earin'g (not shown) and arranged intermediate the end of the roll 30 and the coupling 41 (Fig. 3) previously mentioned which connects the spindle 32 to the continuing spindle portion carried by the stationary bracket 37. f

Secured to the outer end of each of the continuing spindle portions which are coupled, as hereinbefore mentioned, to the spindles 32 is a sprocket wheel 53, the sprocket wheels being interconnected'by a sprocket chain 54, the upper length of which extends continuously between the sprockets, with the lower length broken therebetween and the opposite ends of the chain connected to opposite ends of a lever 55 (Fig. 1). The lever 55 is pivoted at 58 to the upper end of a vertically arranged lever 59 pivoted at its lower end as shown at 60 to the stationary bracket 37 of the material advancingapparatus. Intermediate its endsthe lever 59 is ivotally connected by a link 61 to one end 0 a piston rod 62, the opposite end of the rod carrying a piston 65 operable in a motive fluid'cylinder 66 carried upon the bracket 37. Motive fluid.

is supplied to the right end of the piston 65 from the motive fluid system, through 8. cylinder port 67 and the fluid at the opposite end of the piston leaves the cylinder through a port 68.

Pipes

69 and 70 are connected to the ports 67 and 68, respectively, for this purpose. Attached at one end to the upper end of the lever 55 in line with its connection with one end of the chain 54 is a coiled tension spring 73, the opposite end of which is fixed to the stationary bracket 37. The movement of the lever 59 in either direction and thus the advancement of the stripmaterial 17 b the

cooperating rolls

30 and 42 is limited

adjustable stop screws

74 and 75 carried by the stationary bracket 37 and arranged in the path of the lever when the latter is moved by the piston 65 and returned by the action of the spring 73.

It will be apparent with the material advancing apparatus in the position shown in Fig. 1 that after the spindles 32 have been clutched to the feed roll cylinders 31 by the expansion of the chambers 47. secured to the spindles, as hereinbefore described, and thereafter'the piston 65 is moved toward the left by a predetermined increase in pressure of the motive fluid in the cylinder 66 at the right end of the piston, the lever 59 will be, rocked counterclockwise about its pivot 60. This movement of the lever 59 will cause the chain 54 to travel and through the cooperating sprocket wheels 53 attached to the spin-.

' dles 32 the latter will rotate and due'to their being clutched to the feed roll cylinders 31 the strip material 17 will be advanced toward the right a distance limited by the setting of the stop screw 74. During this feeding movement it will be apparent that the spring 73 will be expanded, thus storing energy therein, which serves to later rock the lever 59 back to its normal position against the stop screw 75. When the pressure of the motive fluid in the cylinder 66 at the right of the piston is reduced to normal, the fluid in the right end of the cylinder is returned to the motive fluid system through the port 67 and pipe 69. When the piston 65 is moved toward the left the fluid in the left end of the cylinder 66 is moved into the system through the port 68 and pipe 70. By using a roll feed for the material 17 and a motive fluid actuatedmechanism includin the lever 59 for operating the rolls with the

adjustable stop screws

74 and 75 lying in the path of the lever, it will be obvious that a very accurate, flexible, and positive feed of the material is effected.

The feed roll cylinders 31 are preventedfrom rotating with the spindles 32 when the latter are rotated during the return 'of the lever 59 to its normal position against the stop screw 75 by means of brakes 76 applied to the peripheries of the -cylinders'3l upon the termination of-the strip material advancin movement thereof and released therefrom at the beginning of a material advancing movement. Each of the brakes 7 6 is' released by the movement of a piston 77 mounted in a motive fluid cylinder 80 having ports 81 and 82 and cooperating

pipes

83 and 84, 'resp'ec tively, connected to the motive fluid system,

the pipes 83 being connected'tothe system through the pipes 51 used for directing the fluid to the chambers 47, the cylinders being supported upon the hinged frame 34,. The

l lower stationary hinge pin 36 is hollow and the pipe 51 is connected thereto within the movable frame 34 at a point below the con-. nection of the pipe 83 therewith, which is connected to the brake cylinder port 81, the pipe 51 continuing from the lower end of the stationary hinge pin 36 (Fig. 3). This, it will be apparent, permits the frame 34 to be swung forwardly, as hereinbefore mentioned, without disturbing the motive fluid connections to the vexpansible chambers 47 and the brake cylinders 80.

A piston rod 87 attached to the piston 77 extends upwardlythrough the cylinder 80 and is pivotally attached to a short arm of a bell crank lever 88 pivoted at 89 to a bracket 90 fixed to the upper end of the cylinder. The long arm of the bell crank lever 88 is attached by a pin and slot connection 91 to one end of a rod 92 reciprocable in the bracket 90, the opposite end of the rod being fixed to the brake 76. A compression spring 93 is mounted in the cylinder 80 surrounding the piston rod 87 and engaging at opposite ends the upper end of the piston 77 and the inner end wall of the cylinder. The spring 93 serves to return the piston to its normal position, as shown in Fig. 1, when the pressure of the motive fluid returns to normal. This movement of the piston through the connec- ,the brake as hereinbefore described. When the piston 77 is moved upwardly or down: wardly the motive fluid at either end thereof g is moved into the motive fluid system through the ports 82 and 81 and cooperating

pipes

84 and 83, respectively.

In timed relation in the following order as the pressure of the motive fluid in the motive fluid system increases in a manner to be presently described, the expansible chambers 47 of the material advancing rolls 30- are eX- panded against the interior Wall of the c linders 31 to clutch the cylinders to the spindles 32, the pistons 77 are moved; upwardly in the cylinders 80 to. release the brakes 76,

g the piston 65 is moved in the cylinder66 to rock the lever 59 counterclockwise and -there-, .by advance the material 17, and finally the piston 13 connected to the press ram 11 ismoved downwardly in the cylinder 10 to form the advance material. v i

In some instancesit may be desirable to use only one or the other of the material advancing. rolls 30 and its associated brake 76, I

in which case by closing an individual valve 94 associated with the pipe 51 below the connection of the pipe 83 therewith. which pipe leads to the port 81 of the-brake cylinder 80,

the respective roll and brake will remain idle without interfering with the operation of v i the opposite roll and brake; the idle roll sure of the roll 42 against the material passing between the rolls occurs.

Main control cabve Referring to Fig. 2 wherein the main control valve 25 is illustrated somewhat in detail with a treadle mechanism and other manually operable lever mechanism for controlling the valve shown in diagrammatic form, a valve casing or body 95 is provided with

main chambers

96 and 97 having

balanced piston valves

98 and 99, respectively, reciprocably mounted therein. The piston valve 99 and chamber 97 serve as an accumulator during a certain period in the operating cycle of the control mechanism, the purpose of which will be described hereinafter. Dur ing an upward movement of the piston valve 99, which is cup-shaped, from its normal position shown in the drawings, a depending stop pin 101 fixed to the upper inner wall of the valve body 95 engages the inner surface of the lower wall of the piston valve and thus predeterminedly limits its upward travel.

The. piston valve 98 at its upper end is provided with an extension 102 which is of less cross-sectional area than the main portion of the valve and is provided with a collar portion 103 at its extreme upper end above the.

upper end of the valve body 95. The collar 103 engages different lever arms of the treadle mechanism and theoother manually operable lever mechanism, to be described hereinafter.

Directing valve In Fig. 1 is shown-the manually operable I directing valve. 24 for directing the motive lever 111 pivoted to a bracket 114 fixed to the upper end of the valve body 104. Three positions of the hand lever 111- are shown in the drawings,-the full line or upper position of the hand lever and the piston valve 108 directs the high pressure motive fluid to the motive fluid expansible chambers 47, brake cylinders 80,'and the cylinders 66, all in? cluded in the material advancing apparatus,

previously described. A movement of the hand lever 111 to the intermediate or upper dotted line position moves the piston valve 108 to a position, which in addition to direct- The valve 24;

ing the highpressure motive fluid to the elements mentioned in connection with the full line position of the hand lever directs the Difi'erentiaZ valve Also included in the motive fluid system is a differential valve 115 used primarily to direct the fluid as it builds up in pressure in a predetermined sequence to the expansible chambers 47 and the brake cylinders of the material advancing apparatus and lastly to the press cylinder 10 when the hand lever 111 of the directing valve 24 is in its intermediate position, as previously described. The valve comprises -a body 116 having main and auxiliary chambers 117-and 118, respectively, with a piston valve 119 a reciprocably mounted therein, an end portion 120 of less cross-sectional area than the main portion of the piston valve 119 being normally entered in the auxiliary chamber 118, which is formed in the right end of the body. Within the main chamber 117 between the left end of the piston valve 119 and the adj acent end wall of the chamber is a compression spring 122 which serves to hold the piston valve 119 in its normal position, as shown in Fig. 1, with an end surface 123 thereof abutting the adjacent end wall of the chamber. A stop surface 124 is provided on they left end wall of the main chamber 117 with which the adjacent end surface of the piston valve 119 is engaged to predeterminedly limit the movement of the later toward the left during the operationof the control mechanism.

Foot treadle and lover mechanism 9 A foot treadle 125 is pivotally positioned at a convenient point with respect to the front of the machine press, although in the diagrammatic illustration as shown in Fig. 2 it is shown for the sake of clearness and to save space, together with other manually operable levers, as-positioned adjacent the collar portion 103 of the piston valve 98 at the upper end of the main control valve 25 upon its right. side. Intermediate its ends the treadle 125 is pivotally connected to the lower end of a vertical link 129 which extends through an aperture provided in a pivotal trip lever 130, the link and the lever being operatively connected together by means of a shoulder 131 formed on one side of the link and engaging the upper edge of the aperture in the lever in its normal operative position, The trip lever 130 has a short trigger arm 132, the end of which engages the under surface of the collar 103 of the piston valve 98 in the normal position of the control apparatus for holding the valve in a neutral position in the chamber 96. On the same side of the llink 129 as the shoulder 131 is a cam surface Arranged above the trip lever 130 is a pivotal lever 136 provided with a short arm 137 having a cam surface 138 engaging the periphery of the collar 103 of the piston valve 98. The lever 136 at its right end has pivoted thereto, as indicated at 139, a bell crank lever 142, held in a predetermined operative position as shown in the drawing, with the end ofa horizontal arm143 thereof engaging the side of the link-129 above the cam surface 135 by means of a spring pressed pin 144 and a cooperating depression 145 carried by the arm 143 and formed in the lever 136, respectively. The purpose of the lever 136, a'rm 137 and bell crank lever 142 when in the position shown in the drawings is to automatically prevent continuous operating cycles if the treadle 125 is held unintentionally in an actuated position by the operator, or if it is desired to operate continuously the bell crank lever is moved to the dotted outline position, whereupon a second depression 146 in the lever 136 cooperates with the pin 144to hold the lever. The manner in which this is accomplished will be referred to in the description of operation of the control mechanism. Compression springs 147 and 148 are operatively associated with the treadle 125 and the trip lever 130, respectively, for normally ur ing them in a counterclockwise direction a out their pivots so that after a depression and a release of the treadle it will return to its normal position and likewise the short arm 132 of the trip lever will be moved into the path of the collar 103 of the piston valve 98, ready to latch thereunder when the valve moves upwardly after its downward movement. The link 129 and the lever 136 are normally. rotated in a counterclockwise direction about their pivots by tension springs 149 and 150, respectively, operatively connected therewith,so as to insure their return to their normal positions as shown in the drawings after a depression of the treadle 125.

Upon a depression of the treadle 125 with the control mechanism in the position as shown in the drawings the material advancing apparatus, which includes the expansible chambers 47, the brake cylinder 80, and the lever advancing cylinder 66, will be operated through an operating cycle and during this operation the press'ram 11 will be stationary at the upper end of .its stroke with a surface 151 thereof bearing against a stop surface 152'provided upon the frame 39 of the press. With the ram 11 in its upper position a vertical rod 153 (Fig. 2) connected to and movable with the ram engages at its upper end an arm 1'56 fixed to a horizontal shaft 157 journaled in the valve body 95 at its upper end and at the left of the piston valve extension 102, the rod 153-and the arm 156 being shown in dotted outline. Fixed to the shaft 157 is a vertical trigger 158 which when the ram 11 is in its upperposition is held out of the path of the collar 103 of the piston valve 98. During anoperation of the press and upon the ram 11 moving downwardly the rod 153 will likewise move and the arm 156 will follow, permitting the trigger 158 to rock clockwise, insured by the action of a compression spring 159 operatively-associated therewith, and thereby rest against the upper surface of the collar 103 of the valve extension 102, which at this period in the operating cycle will be in a lowered position in the valve, chamber 96. When the valve extension 102 later moves upwardly the trigger 158 will be rocked counterclockwise and upon the lower surface of the collar 103 passing the free or upper end of the trigger, the trigger will move into latching position under the collar and there its upper end and at the left of the piston valve extension is a manually operable lever 160 having a bifurcated right end 161 arranged to engage the under surface of the collar 103 for the purpose of raising the piston valve 98 to different positions, the purpose of which will be referred to hereinafter in the description of operation of the control mechanism. The lever 160 is held in its normal position, shown in full lines in the drawings, against a suitable stop surface 163 by a tension spring 164 operatively connected thereto. In an intermediate position of the lever 160, shown in dottedoutline, a lug 165 provided thereon engages an .end surface of a short arm of a manually operable bell crank lever 166 normally held against a suitable stationary stop surface 167 b a compression spring 168 operatively associated therewith.

To move the lever 160 to its lowermost dotted outline position the operator rocks the lever 166 counterclockwise, thus withdrawing the arm thereof out of the path of the lug 165 and permitting a further downward movement of the lever 160.

It is to be understood that at all times the I motive fluid system comprisin all cylinders, chambers, passages, pdrts an pipes hereinbefore mentioned, or which may be hereinafter -desoribed,.are filled with the motive fluid. The fluid from the high pressure pump 26 normally is not under any appreciable degree of pressure, until resistance is encounpump reservoir thereof and directing it tered, while the fluid from the low pressure through a port 189 of the valve body 95 nto a pump 27 is at all times under a predetermined pipe 190 connected to a port 191 ofthe directpressure,'the purpose of which will be made ing valve 24 (Fig. 1). With the piston valve apparent presently. The action of each of 108 in the position shown the pressure of the the

pumps

26 and 27 is. independent of the fluid is directed into a chamber 192 and I other, although preferably included in a sinthrough a port 195 into the pipe69, which, is

' gle structure, as previously mentioned.

connected to the port 67 of the cylinder 66. The'pipe 69 is also connected to the auxiliary chamber 118 of the difl'erential valve 115 by a pipe 196, thereby directing the pressure With the elements of the control mecha-of the fluid-against the relatively small area nism in the position shown in Figs. 1 and 2, .of the piston portion 120, the latter pipe the balanced piston valve 98 beingin then'eualso being connected to an inlet port 197 of tral position, fluid from the high pressure the valve 115 by a pipe 198. From the port pump 26 Will merely be by-passed through 197 the pressure of the fluid is directed into a the valve 25, returning to a suitable fluid chamber 199 of the valve 115 and through a reservoir associated with the pump, and no port 200 thereof into a pipe 203 which is movement of the press ram 11 or the material connected to both of the pipes 51 serving the feeding apparatus will occur. Under these expansible chambers 47 of the material adconditions the fluid passes, as indicated by vancing rolls 30, the pipes 51, as hereinbefore the arrows, from the pump 26 through a pipe described, being also connected to the brake ratios 171 and into a passage 172 (dotted outline) cylinders 80 by the pipes 83. It will b f- B V e body nd in a h mb r 7 parent thatthe fluid contained in the system surrounding the piston '98 within the piston will immediately be subjected to pressure and chamber 96, returning successively by means as the ressure builds up the expansible

chamof chambers

174 and 175, also surrounding h r 47 due to aininimum resistance ofl'ered the piston, passages 176 and 177 and a pipe to the pressure of the fluid, the chambers will 178 to the reservoir of the pump. At th bethe first to respond and will expand against same time, under suitable pressure, and in the inner peripheral surface of the cylinders the direction indicated by the arrows, fluid 3110f the rolls 30, thereby clutching the from the low pressure pump 27 is being concylinders to the spindles 32. The resistance stantly directed by means of a pipe 180, port of the springs 93 acting against the pistons 77 181 of the valve body 95 into the piston chamof the brake cylinder 80 is next overcome by her 97 against-the piston valve 99, thereby the pressure of the fluid and the pistons move holding it in its lower position, as shown, and upwardly and release the brakes 76 from also y a Passage 182 and through a Check the peripheries of the cylinders 31. Finalvalve 183 into a chamber 184 connected to the ly the built up pressure of the fluid against piston chamber 96 and against a surface 18 the piston 65 of the cylinder '66 overcomes the of the valve piston 98 adjacent its connection force of the sprin 73 and the lever 59 is with the extension 102 thereof. The low rocked countercloc wise and into engagepressure fluid thus exerts suflicient pressure m nt with the end of the stop screw 74, there against the piston valve 98, which will insure by advancing the material 17, as hereinbefore that it will move downwardly itsfull stroke described, a predetermined accurate distance when the trlgger arm 132 of the trip lever 130 as determined. by the setting of the stop is wlthdrawn from engagement with the unscrews 74 'and 75.

der surface of the collar 103 by a depression After this movement of the piston 65 the of the treadle 125. It is to be understood that pressure of the fluid increases until the pres-j suitable spring actuated means could be used surethereof against the relatively small area .for moving downwardly the pistonvalves 98 of portion of the piston valve 119 within and 99 instead of the flu1d delivered byithe the chamber 118 of the valve 115 is sufiicient to I overcome the resistance of the spring 122 at.

low pressure pump27 as herein described. I

A depression of-the treadle ashereinthe opposite end of the piston. The piston before described trips the trigger arm 132 valve-119 is then moved and when the piston from under the collar portion 103 of the'pisportion 120 is entirely out of the auxiliary ton valve 98 and the latter immediately moves chamber 118 the fluid will act on the entire downwardly, due to the low pressure fluld cross-sectional area of the piston valve and.

acting against its surface. 185 and it stops positively hold the valve in its actuated posiagalnst the lower end wall of the chamber tion, with the left end surface thereof against 96, as shown in dotted outline in Fig. 2. and the stop surface 124 of the valve chamber 117, 11115111]. hnes in Fig. 5. In this position of the even though the pressure of the fluid drops piston valve 98 an enlargement 188 thereof considerably before the normal cycle of the cuts off the chamber 174 from the chamber fluid system is completed. This last men- 175, preventing the by-passing of the fluid tioned position of the piston valve 119 is from the high pressure pump26 back to the shown in Fig.5. In this last described position of the piston valve 119 an enlargement 204 thereof cuts off the port 200 from the port 197 and opens a passage from the latter by way of the chamber 199 into an outlet port 205 due to .a second enlargement 206 on the piston valve being positioned at the right of the port 205. The outlet port 205 is connected to an inlet port 207 of the directing valve 24 by a pipe 210, but in the particular position of the piston valve 108, as shown in Fig. 1, an enlargement 208 thereof cuts off the port 207 and consequently the pressure of the fluid con; tinues to build up and is relieved by means of a relief valve 211 having a predetermined resistance (Fig. 2), included in a pipe 212 connected at opposite ends to the pipe 190 and a port 213 of the valve 25. The piston valve 98 of the valve 25 at this time is still in its lowermost position, being held there by the low pressure fluid acting against the surface 185 thereof.

The pressure of the fluid directed into the port 213 is thus directed into and around an annular chamber 214 formed in the chamber 96 and into a passage 217 leading to the lOWer end of the chamber 97 and against the under surface of the piston valve 99 carried therein, which is moved upwardly against the resistance of the low pressure fluid acting against its upper surface. The valve 99 continues to move upwardly until a port 218 connected to an annular chamber 219 surrounding the piston valve 99 is opened to the fluid below the under surface of the piston valve. A port 220 formed in the lower end of the chamber 96 is connected to the port 218 by a passage 221 (dotted outline Fig. 2), whereby the pressure of the fluid directed into the port 218 is transmitted to the under surface of the valve piston 98, still in its lowermost position. The pressure of the fluid under the piston valve 98 raises it upwardly against the resistance of the low pressure fluid acting on the upper surface 185 thereof. When the valve piston 98 has moved far enough so that an edge 224 thereof passes a point 225 of the valve body 95, the high pressure fluid will begin to act directly under the piston valve 98 instead of first through the chamber 214, passage 217 to the under surface of the piston valve 99, through the port 218, passage 221 and the port 220 to the under surface of the piston valve 98. j The continued upward movement of the piston valve 98 positions the enlargement 188 thereof so that it does not cut off the chamber 174 from "the chamber 175 and this immediately reduces the pressure of the high pressure fluid to normal and the fluid is then by-passed through the valve 25 and back to the reservoir of the high pressure pump 26, the relief valve 211 immediately closing.

The low pressure oil continuing to act against the upper surface of the piston valve 99 moves it downwardly again to its lowermost position, as shown in full lines in the drawings, and the fluid accumulated under the piston valve is displaced and directed to the under surface of the piston valve 98, thereby raising it until the edge 224 thereof is' during the downward movement of the piston valve 99 when a point 227 thereof is below a point 228 of the valve body 95, the fluid then being directed through passage-221, port 218, annular chamber 219, chamber 97 and through a port 229 into-a pipe 230, through a resistance valve 231 and thence into the pipe 178 to the pump reservoir.

The piston valve 98 is raised above the upper end of the trigger 158 and when the pressure of the fluid acting upwardly against its lower end surface ceases it immediately moves downwardly, due to the low pressure fluid acting against the surface 185 thereof, but since in this particular cycle of operation being described the press ram 11 is stationary and in its upper position with the trigger 158 held out of the path of the collar 103 of the piston valve by-the rod 153 connected to the ram, the collar will not be stopped by the In the continued downward trigger 158. movement of the piston valve 98 the lower surface of the collar-203 will engage the upper end of the trigger arm 132 carried by the trip lever 130 and be held in its neutral inoperative position, ready for the next cycle of operation. As hereinbefore described the trip lever 130 and the trigger arm 132 are returned to their normal position after a depression I and release of the treadle 125 by the springs 147 and 148 and during the upward movement of the piston valve 98 the collar 103 thereof engages the trigger arm 132 and idly rocks the trip lever 130 about its pivot.

The low pressure fluid displaced from the chamber 96 above the surface 185 of the piston valve 98 during the upward movement thereof by the high pressure fluid is directed back to the low pressure pump reservoir by way of the passage 184, a choke aperture 232. passage 182, chamber 97, port 181, pipe 180 and through a resistance valve 233 connecting the pipe 180 and a pipe 234 connected at one end to the pump reservoir. An opposite end of the pipe 234 is connected to a port 235 opening into the chamber 96 of the valve 25. It will be ap arent that the port 235 and the pipe 234 will carry back to the'pump reservoir any fluid which might leak from the valve 25 at its upper end.

When the piston valve 98 is in its neutral.

position and the low crating, fillld under a is directed against the surface 185 of the pressure pump 27 is 0p- 1 predetermined pressure valve 98 according to the setting ofthe resistance valve 233 and when the pressure is exceeded the valve 233 opens and the fluid is ,by-passed therethrough to the associated resf ervoir, thus maintaining the desired pressure against the valve surface 185. The oil displaced from the

chambers

96 and 97 when the

piston valves

98 and 99, respectively, therein 3 are moved upwardly also escapes to the resm ervoir of the low pressure pump 27 through the valve 233.

After the movement of the lever 59 (Fig. 1) against the stop screw 74 by the piston 65, which causes the advance of the material 17, 1 the piston portion 120 of the valve 115 is moved out of the auxiliary chamber 118 thereof, as hereinbefore described, and the piston valve enlargement 204 is positioned at 'the left of the port 200. This opens a path 29 for the fluid displaced from the expansible chambers 47 which at this period immediately contract and also from the brake cylinders 80 as the s rings 93 carried therein expand, the fluid discharging through the

pipes

51, 83 and 203 through the port 200 of the valve 115 and into a chamber 236 thereof, through a port 237 into a pipe 238 and to a pipe v239 connected to the fluid return pipe 178 and thence to the reservoir-of the pump 26. The 0 contraction and expansion of the chambers 47 and springs 93, respectively, it will be obvious, releases the rolls 30 from the drive spindles 32-and applies the brakes 76 thereto previous to the return to normal position of 35 the drive actuating piston 65 and the operatively associated mechanism, the lever 59 being positioned against the stop screw 73. The pipes 84 connected to the upper ports 82 of the brake cylinders 80 and the pipe 70 connected to the port 68 of the cylinder 66 through which the fluid is expelled during the brake releasing and material advancing operations previously described are also connected to the pipe 239. Also to return to the reservoir any fluid which has leaked past the piston valve 108, opposite ends of the valve 24 are connected-through

ports

240 and 241 and

pipes

242 and 243, respectively, with the pipe 239 and likewise the left end of the I 9 valve 115 by means of a pipe 244.

The right end of the valve 115 is provided with a port 245 which is connected to each of the

pipes

196 and 239 and included in these connections are

check valves

246 and 247. The arrangement of the

check valves

246 and 247 is such that during the advance of the piston valve 119 by the pressure of the. fluid against the portion 120 thereof, fluid is sucked through the port 245into the chambe? 117 by way of the check valve 247, thus permitting free movement of the piston valve, which would otherwise be prevented by the format-ion of a partial vacuum in themight end of the chamber 117. Also, when the piston valve 119 is returned to itsnormal position by the spring 122 an exit for the fluid previously sucked into the right end of the chamber 117 is provided through the port 245 and to the pipe 196 by means of the check valve 246.

This completes an operating cycle of the control mechanism with the lever 111 of the directing valve 24 in the upper full line position wherein the material advancing apparatus alone is caused to'actuate and as a result the material 17 has been advanced one step and held there by the brakes 76 while the material advancing apparatus returned to its starting position.

Operation of the material advancing appamtus and the press To operate the material advancing apparatus and the press together, which will be the more general method, the lever 111, of the directing valve 24 will be manually adjusted to the intermediate or upper dotted line position (Fig. 1), which results in the piston the same, as previously described, after a depression of the treadle 125 up to the point Where the pressure ofthe fluid directed from the port 205 of the valve 115 into the pipe 210 is blocked at the port 207 of the directing valve 24 by the enlargement 208 of the piston valve 108. The

piston valves

98 and 119 at this point in the operation of the system will occupy the positions shown in Fig. 5. With the lever in its intermediate position the enlargement 208 will have been moved downwardly sufliciently to open the port 207 to a valve chamber 248, whereby the fluid pressure is directed through a port 249 and into the pipe 20 connected at its opposite end to the, port 18 of the press cylinder 10 and against the upper end surface of the piston '13. The press ram 11 will thus be moved downwardly until sufficient resistance is met to cause the fluid pressure to build up to a point which will result in the relief valve 211 eing opened. Generally this will occur after the punch 12 has completed its work for instance, by blanking a part out of the material 17. Upon completion of the blanking operation the ram 11 moves downwardly a' short distance, determined by the construction of the die 14 or auxiliary stops commonly employed in press construction (not shown) which prevents further movement of the ramand the before mentioned fluid pressure increase and relief thereof occurs. The

fluid pressure increase will also take place during an embossing or forming operation, in which case'no further movement of the ram takes place after the work .is completed, the relief valve 211 being adjusted to open when a predetermined embossing or forming pressure is reached. During a downward movement of the ram 11 the fluid under the piston 13 is directed through the port 19,'pipe 21, a resistance valve 250 included in the pipe 21, a port 251 of the valve 25,

valve chambers

96, 252 and 253, the upper end of the passage 176, passage 17 7 andthe pipe 17 8 to the reservoir of the high pressure pump 26.

Upon the relief 211 opening, the

piston valves

99 and 98 of the main control valve will function, as previously described, but since the ram at this period in the operating the chamber 96 and out the port 251 into the pipe 21', through a check valve 254 included in the pipe, the press cylinder port'19 and to the lower end of the piston 13 in the cylinder 10. The ram 11 will then move upwardly, carrying the connection 153 into engagement withthearm 156 and moving the trigger 158 out from under the collar 103, whereupon the low pressure fluid directed against the surface 185 of the piston valve 98 moves it down wardly until the collar 203 is arrested by the trigger arm 132, thus returning the piston valve to its neutral position.

Operation of the press alone When it is desired to operate the press alone, the lever 111 of the directing valve 24 will be manually adjusted to the lower dotted line position. In this position the piston valve 108 directs the high pressure fluid-only to the upper end of the press cylinder 10.-

Upon a depression of the treadle 125 with the directing valve lever 111 rocked to its lowest position the fluid will be directed, as hereinbefore described in connection with the other operating cycles, through the port 191 of the directing valve 24 and into the chamber 248. With the piston valve 108 in its lower position an enlargement 257 thereof will be positioned so that the port 191 will be cut off from the port 195 leading to the material advancing apparatus, thereby causing the fluid to be directed only through the port 249 and pipe 20 to the port 18 of the press cylinder 10 and against the upper end of the piston 13, and thereby moving it downwardly. When the fluid pressure is built up at the completion of the working stroke of the ram 11, the relief valve 211 will open and in the manner hcreinbefore described return the ram 11 and the control mechanism to their normal and neutral positions, respectively.

Operation of lever mechanism to prevent or cause continuous operating cycles and the stopping of the press ram during its operating stroke When the bell crank lever 142 is in the operative position upon the lever 136, as shown in the drawings, continuous operating cycles of the apparatus will be prevented, even though the treadle 125 is held unintentionally in an actuated position by the operator, in the following manner: As the piston valve 98 moves upwardly near the end of an oper-' ating cycle, the treadle still being depressed by the operator, the collar portion 103 of the valve 98 engages the-cam surface 138 of the arm 137 of the pivotal lever 136 carrying the bell crank lever 142 and rocks the lever 136 clockwise and through the engagement of the arm 143 of the lever 142 with the cam surface 135 of the link 129, the shoulder 131' of the latter is withdrawn from engagement with the trip lever 130, which immediately rocks counterclockwise, due to the compression of the spring 148, thereby moving the end of the trigger arm 132 under the collar 103 of the piston valve 98, which upon next descending will be stopped in its neutral position.

In case it is desired to operate with continuous cycles the bell crank lever 142 is swung into its dotted line position wherein the arm 143 thereof is disengaged from the side of the link 129 having the cam surface 135. With this arrangement it will be apparent that with the treadle 125 held in an actuated position by the operator the collar 203 in moving upwardly and engaging the arm 137 of the lever 136, which carries the bell crank lever 142, will idly rock the lever 136 and no release of the shoulder 131 of the link 129 will occur. Thus when the collar 203 next descends it will not be stopped in the neutral position and another cycle of operation will consequently be effected.

" While the press ram 11 is descending and at any point in its operating stroke the operator in an emergency, for one reason or an: other, may find it necessary to stop the ram. Thereafter the ram 11 may be caused to complete its operating stroke or it may be im- .1125

When the ram 11 is descending the piston,

valve collar 103 will be in the lowermost dotted line position and the upper'surface of the bifurcated end 161 of the lever 160 will be adjacently positioned therebelow, the lever 160 being held in this position against the stop surface 163 of the spring 164:. To stop the ram 11 the operator rocks the lever 160counterclockwise, engaging the lug 165 with the end surface of the short arm of the lever 166, as shown in the upper dotted line position, which movement by means of the bifurcated end 161 of the lever engaging the collar 103 raises the valve piston 98 to its neutral fluid by-passing position and the trigger arm 132 immediately latches under the collar 103 and holds it, the ram immediately stopping. The operator may then either release his hold on the leverl60, allowing it to return to its normal position and then again trip. the treadle 125, thereby causing the ram 11 toresume its operating stroke, or he can rock the lever 166 counterclockwise, thereby removing the end of the short arm thereof out of the path of the lug 165 on the lever 160, which is still in its first actuated position. Thereafter by rocking the lever 160 to the lower dotted line position the bifurcated end 161 is raised and with it the piston valve collar 103, the piston valve 98 will be immediately directed to the lower end of the press piston 13, the ram moving upwardly to its normal posit' on.

Although the invention has been herein illustrated and described in connection with one embodiment thereof as applied to a particular material handling and working apparatus, it is to be understood that the novel features thereof are capable of various other applications limited only by'the spirit and scope of the appended claims.

What is claimed is:

1. In a material handling apparatus, a motive fluid responsive material handling means, a motive fluid transmission system connected thereto, including means for controlling the action of the system, means for maintaining the control means in a neutral position, means for releasing the last means, means responsive thereafter for actuating the control means to renderthe system effective to cause an actuation of the flu d responsive material handling means.

. 2. In a material working apparatus, a motive fluid responsive material working means, a motive fluid transmission system connected thereto, including a'motive fluid responsive valve, means for maintaining the valve in a neutral motive fluid by-passing position,

means for releasing the last means, and a second motive fluid transmission system constantly directing a relatively low pressure fluid against the valve andetfective to cause an actuation of the valve upon its release for rendering the first system effective to cause an actuation of the fluid responsive material working means.

3. In a material working apparatus, a motive fluid responsive material working means, a motive fluid transmission system connected thereto, including a .motive fluid responsive valve, means for maintaining the valve in a neutral motive fluid by-passing position, means for releasing the last means, means effective thereafter to actuate the valve for rendering the system effective to cause an actuation of the fluid responsive. material working means, and means in the system for directing the pressure of the fluid to the valve subsequent to an actuation of thematerial 1 working means and a predetermined increase in the pressure of the fluid in the system for shifting the valve to a point where the pressure of the fluid in the system is relieved.

4. In a material handling apparatus, a motive fluid responsive material handling means, a motive fluid transmission system connected thereto, including motive fluid responsive means for controlling the action of the system, a second motive fluid transmission system constantly directing a relatively low pressure fluid against the control means I when either in a neutral or actuated position, means for rendering the control means responsive to the action of the low pressure fluid for rendering the first system effective to cause an actuationof the fluid responsive material handling means, and manual means operatively associated with the control means operable during the actuation of the fluid responsive material handling means ,for permitting the control means to return to its neu tral position and therebystopping the materi a1 handling means.

5. In a material handling apparatus, a motive fluid responsive material handling means, a motive fluid transmission system connected thereto, including means for controlling the action of the system, means for maintaining the control means in a neutralposition, manually operable mechanism for releasing the lastvmeans, means responsive upon a release of the control means for actuating the same to render the system effective to cause an operatin cycle of the material handling means and manual means operas tively connected to the control means and movable to a plurality of positions in operative association with the manually, operable mechanism for causing when in a predetermined position successive operating cycles of the material handling means'when the said mechanism is maintained in an actuated. position, the manually operable means when in another position effective to automatically cause a single operating cycle of the material handling means with the manually operable mechanism held in its actuated position.

6. In a material handling and working apparatus, individual motive fluid responsive material handling and working means, a motive fluid transmission system connected thereto, including a valve for selectively directing the motive fluid pressure from the system either to the working means alone, the working means and the handling means together, or the latter means alone, a motive fluid responsive valve for rendering the system effective by way of the first valve to cause an actuation of the fluid responsive means, a second motive. fluid transmission system constantly directing a relatively low pressure fluid against the second valve when either in a neutral or actuated position, and means for rendering the said valve responsive to the action of the low pressure fluid for rendering the first system eflective.

7. In an apparatus for advancing material, means for engaging material to be advanced, a driving element, a motive fluid responsive means having a flexible portion effective when flexed for operatively connecting the element'and the material engaging means, and means including a motive fluid transmission system for flexing the flexible portion. is

8. In an apparatus for advancing material, means for engaging material to be advanced, a driving element, a motive fluid expansible chambered means having a flexible portion effective when flexed for operatively connecting the element an the material engaging means, and means in luding a motive fluid trasmission system for flexing the flexible portion. v

9. In an apparatus for advancing material, means for engaging material to be advanced, a driving element, a motive fluid expansible chambered means carried by the element and having a flexible wall effective when flexed for operatively connecting the element and'the material engaging means, and means including a motive fluid transmission system for flexing the wall.

"-10. In an apparatus for advancing material, chambered means for engaging material to be advanced, a hollow perforated driving element positioned therein providing a path for a motive fluid, a motive fluid expansible chambered means surrounding the hollow element and operatively engageable with the interior surface of the material engaging chambered means, and means including a motive fluid transmission system for controlling the action of the expansible chambered means.

11. In an apparatus for advancing material, chambered means for engaging material to be advanced, a hollow perforated driving eratively connecting chambered means and apath for a'motive fluid, a motive fluid expansible chambered means intermediate the outer and inner surfaces of the element and the material engaging chambered means, respectively, for opthe same, and means including a motive uid transmission system for controlling the actuation of the expansible chambered means,

12. In an apparatus for advancing material, a chambered rotatable roll for engaging material to be advanced, a hollow perforated driving shaft extendingthereinto and providing a path for a motive fluid. a motive fluid expansible chambered means carried by the shaft receiving motive fluid through the shaft and operatively, engageable with the interior surface of the chambered roll, and means including a motive fluid transmission system connected to the hollow perforated shaft for controlling the actuation of the expansible chambered means.

13. In anapparatus for advancing material, means for engaging material to beadvanced, a driving element, a motive fluid responsive means for operatively connecting the element and the material engaging means, a motive fluid responsive brakefor the material engaging means, and means inclucling a motive fluid transmission system for controlling theaction of the motive fluid responsive means, the brake and the driving element in timed relation.

14. In an apparatus for advancing material, meansfor engaging material to be advanced, driving means for the material advancing means including an element movable. in reverse directions, motive fluid responsive means for moving the element to cause an advance of the material, means for retracting the element, a motive fluid'responsive means for operatively connecting the element and the material engaging means, a brake for the material advancing means, motive fluid responsive means for withdrawing the brake from the material advancing means, and means including a motive fluid transmission system connected to the several motive fluid responsive loo cally relieving the pressure of the fluid after I h the advance of the material, and means operatively connected to the element for retracting the same preparatory to another advance of the material.

16. In a material handling apparatus, a motive fluid responsive material handling means, a motive fluid transmission system connected thereto, including a valve casing having main and auxiliary chambers provided with interconnecting fluid passages at opposite ends, a piston valve in the main chamberfor controllingthe action of the system, means for maintaining the valve in a motive fluid by-passing position, means for releasing the last means, a piston valve in the auxiliary chamber, means for directing a constant pressure against one end of each of the valves effective to cause an actuation of the main valve'upon its release for rendering the system effective to cause an actuation of the fluid responsive material handling means, the constant pressure means acting A against the auxiliary valve for maintaining it in a neutral position during the actuation ofthe material handling means, means in the system for directing the pressure of the fluid therein into the auxiliary chamber and against the opposite end of .the auxiliary valve to shift it and direct it therefrom to the corresponding end of the main valve subsequent to an actuation of the material handling means and a predetermined increase in the pressure of the fluid in the system for shifting the main valve to a point where the pressure of the fluid in the system is relieved, whereupon the auxiliary valve under the influence of the constant pressure means is effective to cause a continuation of the movement of the main valve to a point where .the system is rendered effective to cause a reverse actuation of the material handling means, means for permitting the auxiliary valve to l return to its neutral position, and means actuated by the material handling means during its reverse. movement for permitting the return of the main valve to its motive fluid bypassing position under the influence of the constant pressure means. f

In witness whereof, I hereunto subscribe my name this 31st day of January, D.

1930. a RALPH JONGEDYK.

Cilf