Патент USA US2404529код для вставки
July 23, 1945‘ V ' L. o. REICHELT ETAL ' I 2,404,529 VALVE Filed May l2,_ 1943 ' v 3 Sheets-Sheet l I I . \\' \\ Ali nvvsurons ‘ L.O. RE/CHELT 0. ll WA TERS BY ATTORNEY I July 23, 1946; L. 6. REICHELT ET AL‘ VALVE 2,404,529 I a Sheéts-Sheetyl s Filed May 12, 1943 FIG. 7 F I a. ' a . ,_L m5 PRESSURE ' UE, ‘E LI __/U/ TREADL E‘ TRA VEL . INVENTORS L.‘0. RE/CHELT vD.|/. WATERS I. BY ATTORNEY Patented July 23, 1946 2,404,529 ‘UNITED STATES PATENT OFFICE Lester 0. Reichelt, Cranf0rd, and Daniel Vaughn Waters, Flemington, N. J ., assignors to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application May 12, 1943, Serial No. 486,640 1 Claim. (01. 121‘_46.5) This invention relates to valves, and ‘more par ticularly controlling apparatus for ?uid operated machines. . During the operation of certain types of ma chines, it has been found desirable ofttimes to be able to apply varied forces to the .material work; ing parts of the machine and/or to cause their movement into operative positions at varied speeds. When the control of such machines lies in a manually actuable ?uid control apparatus, it 2 extending to and communicating with the opera tive and return portions of a cylinder I 5 below and above a piston [6. Although the apparatus has been designed to control air Lmder messure to the cylinder, it would function equally well with other ?uids such as oil, Water and the like. The cylinder and :piston are part of a‘schematically illustrated machine, indicated generally at H, which includes a die [8 movable with the piston relative to its companion die 19 which is sup has been found advantageous to equip the vap portedby suitable means 20. a paratus ‘with means so that, through it, these The apparatus In has a housing 22 threadedly variations may be brought about. apertured at 23, 24 and 25 for the connection of An ‘object of the invention is to provide a ?uid the supply line II and the ?uid lines l2 and I4 controlling apparatus which is simple in construc 15 respectively. By viewing Fig. 5, it will beapparent tion yet highly e?icient for actuation in control that the supply line H, or the threaded aperture ling the operation of a machine. , therefor, leads into a chamber 21, this chamber With this and other objects in view, the inven extending lengthwise of the housing as illustrated tion comprises a ?uid control apparatus having a in Fig. 2. Communicating with the chamber v2'! housing with ?uid :chambers therein, in one of 20 are two control valves 28 and 29 which may be which a pair of supply valves is disposed, an ex haust valve being disposed in' the other,‘ and means to control the supply and exhaust valves for alternately supplying a ?uid under pressure to opposite sides of an operating piston, one of. the supply valves having an associate control to ’ vary the pressure of the ?uid directed to its re respectively termed operating and return'valves, as they will control the?ow of the ?uid to move the die l8 through the action of the piston It‘ respectively into the Ioperating position and the returnor normal position. These valves are nor mally urged ‘downwardly into engagement with‘ their seats or apertures 30 and 3| by their respec tive springs 32 and 33. Threaded caps or covers Other objects and advantages will be apparent 34 and ‘35 are disposed in threaded apertures of from’ the following detailed-description whencon 30 the housing in alignnient'with their respective sidered in conjunction with the accompanying valves 28 and 29, to function as abutting supports drawings, wherein a a l r for their springs and to provide access to the \Fig. 1 is a side elevational view of the apparatus shown connected to a machine, the operation of The ‘valve '28 has a stem 38 projecting down-1 which the apparatus is to control; a‘ wardly through apertures 39 and fit in the hous Fig. 2 is a top plan view of the apparatus; ing to a- given position beneath the housing,_ as Fig. 3 is an end elevational view of the ap spective side of the piston. ’ ' “ valves. ' ‘ ‘ ' shown in Fig.1 5. Concentric with the valve stem 38 is a 'control element or metering valve 4!, Fig. 4 ‘is an enlarged vertical sectional view 46 which is cylindrical in general contour for slid able movement in the aperture 39 and has cir~ taken along the line 4—4 of Fig. 2; ' cumferentially spaced V-grooves 42 in its periph- ' Fig. 5 is an enlarged vertical sectional view taken along the line 5—5 of Fig. 2; ~ ery extending from, the upper, end thereof to ‘ positions at approximately the center of the ele Fig. 6 is a vertical sectional view of a part "of the ?uid control means of one of the supply .45 ment, at which positions the grooves vtaper out paratus. this view being taken along the line 3—3 of Fig. 2; ~ ' - . , valves ; wardly, .as indicated at 43., to the cylindrical pe Fig.7 is a top ,plan view of the structure shown in Fig. 6, and Fig. 8 is a, graph showing variations in pressure at opposite sides of the piston through the con trol of the apparatus. Referring now to the drawings, attention is ?rst directed to Fig. 1, which illustrates the apparatus, indicated generally at 10, connected to a ?uid supply line H and’ having ?uid lines I 2 and I4 55 riphery of the element at these points. The por tions of the element between the grooves 42 in the upper half of theelement are recessed, as ‘at 44, to allow for the free passage of the ?uid under pressure completely around the ‘element at this portion. The lower end of the element 4| has a shoulder .45 to receive the upper end of a spring 46; the lower end of which rests upon a shoulder .41 of a tubular member 48, the latter being dis-i‘ 2,404,529 3 its engagement with the element 10, is moved upwardly and with it is moved the spring 46 and posedin the aperture 49 concentric with the valve ‘ the control element 4|. This movement of the elements 48 and 4| and the connecting spring '45 continues to cause the solid lower portion of stem 38. At this time attention is directed to a hollow portion 59 of the housing which is ‘open to the ‘ atmosphere, the aperture 39 communicating with this open portion. The threadedaperture 24, to which the ?uid line I2 is connected, communi cates with the aperture 39 and through it with the element 4| to substantially close the aper ture 39 before the valve 28 is opened. When the element 10 is moved a su?icient distance to engage the lower ends of the valve stems 38 and the chamber 21 and the atmosphere at the open ,10’ 59, it is in a position to open the valves 28 and 55 portion 59, depending upon the control of the against the force of their springs 32 and 51. The valve 28 and the element 4|. opening, of the valve 55 provides an exhausting a of the aperture 39 an annular Also, recessat5|the ipsformeyd bottom : ‘ V in the housing about the element .4|.' ,7 Attention is now directed to'the valve means for the upper portion of the cylinder |>5 ' ' 29, through the line H, the chamber 53, and into e the atmosphere ‘through the aperture ‘56 opened as illustrated in Fig. 4, is disposed in the chamef ber 21 and controls the ?uid under pressure from the chamber 21 to a chamber 53. by the valve 55 at the hollow portion 50. How ever, prior to the opening of the exhaust valve The chamber I 55 the valve 29 will be'closed by the aforemen- ‘ tioned action of the treadle and lever. Y 53 extends longitudinally of the housing 22,, as . illustrated in Fig. 2, affording communication be The moment the valve 28 is moved into open tween the chamber 2'! at the valve 29 and the 20 position, fluid under a given pressure from the threaded aperture ‘25 to which the fluid‘ line I4 supply line H and in’ the chamber 21 may pass is connected. In the chamber 53 an exhaust into the aperture 39 and a portion of this ?uid valve 55 is disposed, normally'held on its seat or may be directed‘to the lower portion of thecyl aperture 56 by a spring 51 positioned in a cap 1-5, that is beneath the piston l6, through 58 threadedly disposed in an" aperture of the 25 inder the ?uid line l2. The ?uid under pressureenl housing as illustrated in Fig. 5. The valve 155 is tering the aperture 39 ‘and,?lling the ?uid line adapted to open the chamber 53 to the atmos- I |l2 and the portion of the cylinder beneath‘the. piston I6, will build upapressure' depending upon ' phere through the open portion 59 ofthe house ing. ’ A stem 59 for the valve 55 extends down wardly through ‘the housing to a'position, as illustrated in Fig. 5; vin a plane with the lower force of the element 4|. ,_ This force 30 theholdi'ng' will be applied against therforce of the'spring end of the valve stem 38., A Valve stem 60 for the valve v2'9 extends downwardly through. the housing to a position indicated at 6|, at a'differ that of the spring, theelement 4| will be moved downwardly until these'forces are balanced, at contact with their valve stems is illustrated in‘ Figs. 1, 3 and 5, and includes a‘ lever 63 pivotally supported'at 64 and actuable through a treadle parent that the position of the'treadle, and in a like manner the position of the lever“ 63, gov? erns the pressure of the ?uid applied to the pis 46 and if the force vof the ?uid is'greater than which time the grooves 42 in ‘the element 4| may ' ent level from that of the lower ends of the valve 35 extend out of the aperture 39 and allow a por stems 38 and 59. V ‘ V 1 tion of the ?uid to escape; Thus it will be ap- . The means for actuating the valves through ton l6. . The pressure at the piston may be in. creased or varied with increased pressure or var iation of pressure on the treadle 65. Thus’ a gradual downward movement of the treadle will ' in Fig. 4. and hold it in its open position shown In this position‘ the valves 28 and 55 remain closed 45 cause a gradual increase in, the force of the, spring and the valve 4| open as illustrated in'Fig. 5. ' 46 ‘through the continued, upwardv movement of . 65, pivoted at 66, against the force of a spring - 51, the latter normally urgingvthe lever into the position shown in Fig. 1,,to actuate the valve 29 the member 48, effecting an increase'in the force To assist‘the lever 63 in operating the valves 28 of the ?uid passing to the cylinder beneath the and 55, a cross piece orelement 19 has its cen piston. During this movement of the treadle tral portion lying ‘upon a rounded end ‘H of the lever ~63, its ends being provided with, hearing 60 and the member 48, the spring 46 tends to force the control element‘ 4| upwardly into the aper . portion 12 for movement on guide rods 13 which, ture 39, to decrease the size of the outlet por through the bearings, assure maintenance of the tions at the ‘grooves '42 'and thus decrease the element in a true horizontal position at all times amount of fluid allowed to escape. , Through during its movement. The element 10 isdisposed for engagement with the tubular member 48 and 55 continued movement of thetreadle '65, added force will be established in the spring 46 until the valve stems 3B and 59‘. -' " .. . ‘ .hisforce is greater than the line or supply pres, Upon ‘considering the operation of the‘ valve in sure of the ?uid, at which time the full force of conjunction with the apparatus |'|, let it be as the ?uid will be applied to the piston. ‘ It will, sumed that the valve and apparatus are in the normal position shown in Fig. 1. In this posi 60 therefore, be apparent that the apparatus may be moved into closed position under variablepres tion’ the valve '29 is open and ?uid'under pres-v sures or under a constantly increasing pressure, sure is free, to pass from line H through cham ber 21,.aperture 3| opened by the valve29, cham ber 53, and ?uid line l4, to the upper portion of the cylinder I5. This fluid pressure causes 65 downward movement of thepiston IE, to move the die l8 away‘from its companion die l9. ‘ To move the dies into closed position, that ‘is the die l8 relative to the die ‘19, the treadle or control element 65 is moved about its'pivot B6, and‘ as a result lever 63 is'moved about its pivot 64 against the force of the spring 61. During the movement of the‘lever 63, the valve 29 is re leased .and allowed-to be closed by its spring 33'; At'the same time the tubular member 48‘, through such being under thecomplete control "of. the treadle' ' _ t v _ The action of the piston l?'under thisnforce may be illustrated‘by the ,‘graph‘shown injFig. "8. The (left) vertical line ‘represents vpressure in the cylinder, the lower horizontal line represents the treadle position'or the positionrofthelever 53 relative ‘to its valve stems andv the upper dotted line represents line pressure‘orthe 'full‘pressure of the fluid. from the supply line ,| |. ' ,Thus start: ing at‘ zero with the treadle in its nermalljposie tion, theline 'ymarked (LI), lower intake, indie oates the‘. effect “of a gradual depression of the 5 2,404,529 treadle the full distance. In other words, after a short movement'of the treadle the ?uid pres sure -beneath the piston will gradually increase over a given period of time, that determined by the travel of the treadle until the pressure be neath the piston has increased from zero to the v full line zero. The line marked UE, upper exhaust, indicates the pressure in the cylinder above the piston. It will, therefore, be apparent, by this line UE, 10 that the upper cylinder end has full line pressure of the ?uid therein prior to the actuation of the treadle or during the normal position thereof. After a given movement of the treadle, as indi-‘ 6 controlled through the speed of ‘ travel of the treadle or its associated lever. It should be un derstood, also, that the stopping of the move ment of the treadle at varied positions will re sult in the application of varied pressures oper ating the apparatus. It may not be necessary, in certain instances, to apply full line pressure to the piston. In such instances the desired pres sure may be applied by limiting the position of the treadle. v Although speci?c improvements of the inven tion have been shown and described, it will be understood that they are but illustrative and that various modi?cations may be made therein cated by the horizontal portion of this line, the 15 without departing from the scope and spirit of valve 55 will be opened, the valve 29 being closed, this invention as de?ned by the appended claim. allowing escapement of the ?uid from the upper What is claimed is: ‘ cylinder end into the atmosphere. The time in A ?uid control apparatus comprising a hous terval for exhausting the upper cylinder end is ing having an inlet port and an outlet port with short, as indicated by the said line UE. 20 a connecting passageway therebetween having an The lines UI and LE represent the upper intake outlet end opening to the atmosphere adjacent and lower exhaust under the control of the valve. the outlet port, a valve normally closing the pas The return movement of the piston I6 is more sageway between the ports and having a stem ex rapid than its feeding movement, as illustrated tending through the said outlet end of the pas by the lower exhaust line LE coupled with the 25 sageway, a supply line for a ?uid under pressure intake line LI and comparable with the upper connected to the inlet port, a ?uid line connected intake UI for the upper cylinder end. In each to the outlet port, a member movable under varied instance there is free uninterrupted passage for forces to engage the stem and open the valve to the ?uid entering the upper end of the cylinder v open the passageway between the ports, an ele through the opening of the valve 29 and the ex 30 ment movably disposed in the passageway concen hausting of the ?uid from lower end of the cyl tric with the stem and formed to close the out inder through the closing of the valve 28, effecting let end of the passageway when in one position opening of the aperture 0r passageway 39 for the to cause the ?uid under its full pressure to pass exhausting of the ?uid into the atmosphere into the ?uid line and to provide an opening through the grooves 42 in the element 4|. In varying in size with variations in the position of this manner the element 4|, through its grooves, "the element in the passageway to cause varied serves as an exhausting means during this por quantities of the ?uid to escape through the said tion of the operation of the valve structure and ('exit end and thereby vary the force of the ?uid serves as a pressure control means during the in the ?uid line, and resilient means to apply opening of its valve 28. ,As a result of the valve varied forces to the element to vary the position structure, the operating portions of the apparatus may be returned as rapidly as desired, their move ment into operating positions, however, being thereof in the passageway. ' LESTER O. REICHELT. DANIEL VAUGHN WATERS.