Патент USA US2411748код для вставки
NOV. 26, 1946. ' C, 5_ KELLEY - CONTROL l 2,411,748 DEVICE Filed May 20, 1944 57 IN VENTOR ’ BY @im ' ATTORNEY Patented Nov. `26, 1946 21,411,748 ' UNITED STATES PATENT N 2,411,748 CONTROL DEVICE rCecil S. Kelley, Forest Hills, Pa., -asslgnor to The Westinghouse Air Brake Company, Wilmerdlng, Pa., a corporation` of Pennsylvania ' Application May 20, 1944, Serial No. 536,487 e claims. (ci. A12x-_41) A 1 ' 4 2 v This invention relates vto control devices and more particularly to the fluid pressure controlled clamped 'between the casln'g section 8 and cover .9. All of these diaphragms are arranged in coaxial ' relation with each other‘and with the power pis One object of the invention is to provide an im ' ton I0. The flexing portions of diaphragms Il. proved fluid pressure controlled and actuated de 5 I 2 and I3 are of the same areas. The flexing por vice for adjusting any desired means such as an tions of diaphragms I4 and I3 are each of a lesser and operated type. L ' engine governor to control the speed or powe output of the engine. ’ ’ area and their areas are equal to each other. A more speciiic` object of the invention is the Between the power piston I0 and non-pressure head 4 is a non-pressure chamber 20 which is open provlsion of such a device embodying a fluid pres sure controlled power piston and valve means ar ranged for control by fluid under pressure for controlling the pressure of fluid on the power tween said piston and pressure head 5 is a power pressure chamber 22 which is open to a fluid pres sure control passage 23. A rod 24 extending piston. ' r Still another object of the invention is the pro vision of a device of the above general type em bodying a power piston and a multiplicity of ilex ible diaphragms all of which are arranged in co axial relation providing aV relatively small com to atmosphere through a passage 2l, while be through piston I0 and secured thereto passes through pressure chamber 22 and a suitable bore in thel pressurehead 6 to beyond theouter sur face thereof. The pressure head 5 is provided with two recesses spaced from each other and encircl ing the piston rod 24, and in each of these recesses pact and efllcient structure. 20 there is disposed a sealing ring 25 providing a Other objects and advantages will be apparent sea1 between the pressure head and said rod to from the following more detailed description Yof prevent leakage of fluid under pressure Vfrom the invention. ” n chamber 22 along said rod to atmosphere. A lu In the accompanying drawing; Fig, 1 is a longi bricating fitting 23 is secured to the pressure head tudinal view, mainly in section, of the improved 3v and is open to a lubricating recess 21 provided device; Figs. 2 to 5 are sectional views taken on in said head around the piston rod whereby the portion of said rod which slides through said head lines 2-2, 3-3, 4-4 and 5_5', respectively, in Fig. 1, Figs. 2 and 3 being shown on an enlarged - may be lubricated as required. v. The piston rod 24 projects slightly beyond the scale; and Fig, 6 is a line diagram of a portion of the structure shown in Figs. 1, 4 and 5. 30 rear face of piston I0 into non-pressure chamber _ Description 20. wherein it is provided with a spherical like end 3| which fits in a recess provided at the center of one side of a spring seat or follower 28. A like As shown in the drawing, the improved device comprises a power cylinder I having mounting follower 29 is oppositely arranged adjacent the feet or lugs 2.` One end of the cylinder I is closed 35 non-pressure head 4 and extending between and by an integrally formed non-pressure head 4, having contact at its opposite ends with these two '_ while the opposite end is’closed by a removable followers is a coil control spring 30. This spring pressure head 5. A pile or stack of substantially is confined between the two followers under pres ring like casing sectionslö, 1 and 8 are secured to sure for urging said piston in the direction of the each other and to the non-pressure head 4 in co 40 left hand upon release of fluid under pressure axial relation to cylinder I. The casing section 3 from chamber 22 and for opposingumovement of at one end of the pile is mounted against the end said piston in the opposite direction >upon supply of the cylinder, while secured to casing section 8, of fluid under pressure to chamber 22. The ex disposed at the opposite end of the pile, is a treme left hand position of piston I0 is determined cover 9. v , by contact of said piston with a stop 32 provided A power piston I0 is slidably mounted in the cyl' on the pressure head 5. inder I. Cla'mped~ around its peripheral edge be Between non-pressure head 4 and diaphragm tween the end of cylinder I and one side of casing II is a chamber 35 which is openthrough a pas section 8 is a iiexible diaphragm II. Two op sage 33 `to non-pressure chamber 20. Between positely arranged flexible` diaphragms I2 and I3 50 the two diaphragms II and I2 is a chamber 31 ‘are clamped, around their edges, between, respec to which is connected passage 23 leading from tively, the adjacent faces of casing sections 6 and the pressure chamber 22.- A diaphragm follower 1, and 'I and 8. In the opposite face of casing sec 38 disposed in chamber 35 in coaxial relation tion 3 is a recess in which are disposed the peri with diaphragm II has one side in contact with pherlal edges of two ñexible diaphragms I4 and I5 the adjacent surface of said diaphragm and is and a spacer ring I8 separating said diaphragme provided on its opposite `side with a plurality from each other. The cover 9 has a ring »like ex of raised stops 39 for contact with the adjacent tension Il projecting into the recess and engaging side of the non-pressure head 4.` The non-pres the edge portion of the adjacent diaphragm I5, sure head 4 is provided centrally- with 'a' bore whereby the diaphragms I4 and I5> are securely 60 which is lined with" a bushing 40 and slidably 3. 8,411,748 4 . mounted in this bushing are 'three sectors of a ' ' and the adjacent spring follower 29 are al1 mov - ring like projection 4I of the follower 38. said able as a unit. v Chamber 5| between diaphragms 'IÍ and I3 is connected to a pipe 65 adapted to be supplied- sectors being equally spaced from each other. A » strut member 42 mounted in the projection 4I is provided with a stop flange 43 which is sup ported by the end of said projection. Projecting with fluid under pressure from any suitable source. Chamber 60 between the diaphragms I3 from the opposite side of member 42 is a cylin drical like 4head 44 disposed in the recess in. ment modifying pipe or what may be called a and I4 is adapted to be connectedto an' adjust follower 28 for supporting said follower. It will Vernier control pipe 66. Between diaphragms I4 movement of the member in one direction. threads to the cover-9. Encircling the projection be noted that follower 38 and member 42 are 10 and I5 is a _chamber 81 which is in constant com munication with chamber 5I in a manner which capable of movement in either direction in bush ' will be later described. ing 40. The bushingv 48 is kprovided in the non The follower plate 58 has an axial projection pressure chamber 28 with an outturned collar 45 69 extending through control chamber 56 and which is disposed in contact with the inner' sur face of the non-pressure head. This collaris 15 with its end disposed toslide in a guide bore in a cap 10 removably secured by cooperating screw arranged for contact with member 42 to limit 69 is a coil balance spring 1I, one end of which The diaphragm follower 38 has a hollow pro bears against the plate 58. The opposite end of jection 48 extending centrally therefrom through an axial opening in diaphragm Il into chamber 31, and disposed in this chamber and mounted over said projection against the adjacent face of diaphragm I I is a follower plate 49. v A combined spacer and follower 50 is disposed in a chamber 5I formed between the two dia spring 1I is supported on one or more shims 12 carried in the cap 10. Within sleeve 59 is a chamber 15 which is open I through one or more radial bores 16 in said sleeve and aligned radial bores 11 in spacer means 25 84 to chamber 61. The boss 6I has an axial bore 18 open at one end to chamber115, while its op posite end is open through a seat, provided for engagement by a supply' valve 19, to a chamber phragms. »The follower 50 has a sleeve like mem 80 provided in member 52. At the end adjacent ber 52 projecting centrally from one side through anv axial opening in diaphragm I2 into chamber 30 the supply valve 19, the bore 18 is open through one or more radial bores 8| to the fluid pressure 31, and slidably mounted on this member in said phragms I2 and I3 and has its opposite faces in contact with the adjacent faces of said dia chamber is a sleeve 53 one end of which contacts supply chamber 5I. ` The supply valve 19 is provided on one end of the follower plate 49 which is in contact with a stem 82 extending through bore 18 into cham diaphragm II. At the opposite end of sleeve 53 ber 15 and said stem is provided with a plurality is a follower plate 54 which contacts the adjacent of longitudinally extending spaced ribs 83 having face of diaphragm I2. 'I‘he projection 48 of fol sliding contact with the wall of _said bore, said lower 38 is provided with external screw-threads, ribs terminating short of said valve a distance while the sleeve 52 encircling said projection has equal at least to the width of the radial port 8l. internal screw-threads cooperating with those on said projection. Turning of the follower 50 40 In chamber 15 the valve stem 82 is provided with an enlarged head 84 which is engaged by one end and sleeve 52 relative to and onto the projection of a coil spring 85. The opposite end of this 48 of follower 38 will therefore clamp the central spring seats on the end wall of said chamber, portions of the two diaphragms II and I2 be which spring is constantly effective to urge the tween their respective followers and secure such supply valve 19 toward its seat with a relatively parts together for movement in unison. light degree of force. Between the cover 9 and diaphragm I5 is a The projection 48 of follower 38 is provided pressure chamber 56 which is open to a control ‘ with an axial bore open at one end to chamber pipe 51, and which contains' a follower plate 58 80, and slidably mounted in this bore and extend engaging the adjacent side of said diaphragm. This plate constitutes a ñange provided at one 50 ing into said chamber is a plunger 81. The tral openings provided in the diaphragms I5 and plunger has a stem 88 extending through a bore provided in follower 38 into the space within the I4, and in ring like spacer means 64 interposed between and engaging adjacent faces of said dia projection 4I, is supported on a member 89 hav end of a sleeve 59 which extends through cen phragms, said sleeve extending into a chamber 50 formed between the two diaphragms I3 and I4. The follower 50 arranged between dia phragms I2 and I3 has a hollow boss 6I extend projection 4I.. .The end of stem 88, within the ing radiating fingers 90 extending through the spaces between the sectors of projection 4I and supported on a suitable annular shelf 9| provided on the non-pressure head 4. ~ The stem 88 is provided with an axial bore 92 ing through a central opening in diaphragm I3 into chamber 60 wherein said boss is provided 60 open at the end adjacent support member 89 to a plurality of radial bores 93 leading to the space with external screw-threads cooperating with in within the projection 4I which space is open to ternal screw-threads provided in sleeve 59. Slid atmosphere through the space between the sec ably mounted on sleeve 59 within chamber 60 is tors of said projection and thence by way of non contacting diaphragm I3 and having at the 0D 65 pressure chamber 20 and passage 2|. The oppo site end of bore 92 is opened to the interior of . posite end a follower- plate 63 contacting dia the plunger 81 through a valve seat‘provided for phragm I4. By tightening sleeve 59 on boss 6|, engagement by a fluid pressure release valve 94. the central portion of diaphragm I3 will be a member having at one end a follower plate 62 clamped between followersv50 and 62, and the The release valve 94 is provided on one end of central portions of diaphragms I4 and I5 will 70 a pin 95 which is mounted to slide in a bore pro vided through a suitable guide 96 disposed in the be respectively clamped between follower 63 and plunger 81. This guide is provided with three spacer means 65, and said spacer means and plate spaced guide ribs 91 (Fig. 2) which engage the 58. With the parts assembled in the manner'so wall of the plunger, and between these guides far described-it will be noted that the central portions of all of the diaphragms, the stop 42 75 are spaces 98 for allowing flow of ñuid under 5 2,411,748 pressure from chamber 80 at one end of the guides decrease said distance >and lever arm. The ad Justments of the pivot pin IIE Ado not change to an -annular recess 99v at the opposite end, the release valve 94'being contained in said recess. The release valve pin 95 extends into chamber` 80 and therein is provided with a head |00, and between this head and the adjacent end of the connections between said pin and the lever 5 _ |09 or member ||3, but only the connection be tween the piston rod 24 and the pin II5. These> facts are believed to be clearlybrought out in the line diagram in Fig. 6 wherein the pivot pin is indicated by the portion IIB thereof and to plunger 81 is interposed a coil spring I0| which constantly tends to urge the release valve 94 away from its- seat. The supply valve 19 is pro the center of this portion are connected lines vided with a stem |02 loosely- extending through 10 indicating the lever |09 and member I|3. The the seat for said valve and engaging the head eccentric II8 is shown in the neutral position |00 which is at all times maintained in contact occupied with the adjustment of disc |20 as in with said stem by spring IOI, whereby the supply Fig. 1 and above described, and connected to the valve 19 and release valve 94 will move in unison. center of the eccentric is a line indicating the Projecting from' pressure head 5 is a bracket v piston rod 24. The purpose of this structure |05 and connected to said bracket by a pin |06 Including the eccentric II8 will be hereinafter is one end of a rockable link |01. The other end brought out. of link I 87 is disposed between outer ends of two Operation arms |08 of a lever |09 and is rockably connected thereto by a pin IIO. The two arms |08 are 20 In operation, let it be assumed that member integrally connected intermediate their ends by ||3 is connected to the device which it is desired a. bridge I I I. Disposed between the opposite ends to operate or adjust. Let it further be assumed of the two arms |08 are jaws I |2l provided onone that the fluid pressure supply pipe 851s connected end of a member |I3 which is provided for con- . to a suitable source of ñuid under pressure; that necting the device to the means to be operated, 25 the control pipe 51 is connected to a suitable op such as an engine governor. The piston rod 24 erator's control valve device, and that the vernier> has a tongue II4 disposed between the jaws II2. controlpipe 68 is connected to a suitable opera The Irlston rod 24 is connected to the member tor’s vernier controlvalve device. I|3 and the ends of the lever arms |08 by a pivot With pipe 65 supplied with fluid under pressure pin I|5 having an axial portion |_I5 at one end 30 from the source, fluid under pressure will equalize extending through and operatively connecting into chamber 5| between the two diaphragms I2 one of the lever arms I 08’to the’adjacent jaw and I3 and thence past the ribs 83 on the supply I I2. The pivot pin |I5 has another axial portion valve stem 82 into chamberv 15 and from chamber II1 extending through and operatively connect~ 15 through bores 16 and 11 into chamber 61 be ing the other lever arm |08 to the jaw, and the 35 tween the diaphragms I4 and I5. The pressure two axial portions ||6 and I|1 are connected by 'of fluid in chamber 5I acting on diaphragm I2 counteracts said pressure acting on diaphragm a part in the form ofan eccentric I|8 which extends through and operatively connects the I3, and vice versa, and the same is true with re piston rod 24 to the pivot pin I I5 and thereby spect to said pressure in chamber 81 acting on to member II3. The eccentric IIO bears in the 40 the diaphragms I4 and I5, so that such pressure tongue II4 of the pistonrod against a bushing will have no effect upon operation or positioning ' ofthe structure longitudinally of the device. The axial portion |I1 of the pivot pin ||5 is It is intended that by operation of the opera of greater diameter than the axial portion I I6 tor’s Vernier control valve device fluid at a chosen and bears at its inner end against the adjacent 45 nominal pressure, such as twenty-five pounds, will normally be provided through pipe 96 in face of the piston rod tongue II4. On the outer end of the axial portion |I1 is an adjusting disc chamber 60 between the two diaphragms I3 and ' |20 bearing against the adjacent Vlever arm |08. I4, and since the diaphragm I3 is of greater di ameter than diaphragm I4, this pressure will 'I'his disc is provided across its outer face with a screw driver slot |2I for turning the disc and create a force acting v,inthe direction of the left hand, asviewed in the drawing, equal to the pres pin I|5 relative to the piston rod 24 and other connected parts. The disc |20 also has a semi sure of such fluid times the difference in areas of the two diaphragms. ’ l , circular through slot |22 adjacent its peripherlal The minimum pressure normally provided edge through which extends a stud I 23 secured through control pipe 51 in chamber 58 to act in the adjacent lever arm |08. A nut |24'on stud on diaphragm I5 is preferably of a chosen low I 23 is provided for securing the disc |20 and thereby the pivot'pin- | I5 to the adjacent lever degree, such as five pounds, and in use, the oper II9 provided in said rod. ator’s control valve device is intended to vary the pressure of iluid in chamber 56 only between this arm |08 for movement therewith. Loosening of nut |24 providesfor adjustment of the pivot pin ||5 relative to the lever |09 and member ||3 and thereby angular adjustment of eccentric | I8 rela tive to the end ofthe piston rod 24. 60 low pressure and a selected higher pressure such as fifty pounds. It will be noted that this pres sure effective on diaphragm I5 also creates a force urging the parts of the device in the direc The adjustingslot |22 is so arranged in the tion of the left hand. The pressure of spring 1| disc |20 that with the disc secured in a position with the stud |23 at the center of slot |22, a line 65 also acts on diaphragm I5 in the same direction. intersecting the axes of the pivot pin ||5 and eccentric |I3 rwill be vertical to a line intersecting the axes of the pivot pin and of-pin |I0 at the opposite end of lever |09. Adjustment of the pivot pin ||5 by turning disc |20 in a counter 70 clockwise direction,V as viewed in Fig. 1, willin ` crease the distance between theicent‘er of the eccentric and pin ||0 and thereby increase the length of the lever arm for the piston rod 24, The pressure of spring 1| is so adjusted by shims 12 that its force plus the minimum pres sure of fluid (five pounds) acting in chamber 56 on diaphragm I5, plus the force created by the normal pressure (twenty-five pounds) of fluid in chamber 60 acting on the differential areas of diaphragms I3 and I4 will, with the parts of the device in the positions shown in the drawing, just balance the opposing force of control spring 30 while adjustment in a clockwise direction will 75 applied through stop 42 to the followers, spacers, 2,411,749 sleeves, etc. connecting the central portions of ply of fluid under-.pressure to pressure chamber 22 will thus be cut of! when it is increased to a degree for sumcientiy increasing the pressure of of the device positioned as shown in the drawing, spring 3l to offset the increase in pressure of the stop flange 43 of the strut member 42 is fluid in the control chamber Il, andto thus 4re slightly spaced away from stop collar 45 carried store the balance of opposing forces, 'above men by the non-pressure head l of cylinder I, per mitting the plunger 81 to be positioned with re It will now be seen that the piston I0 will be spect to the member 89, which is fixed with re moved away from ~the stop 82 a distancev corre spect to the casing, S0 that the supply valve 19 will be closed by spring 85 and the release valve 10 spondingI to the pressure of fluid provided in chamber 22, and thus corresponding .to the in 94 will also be closed by said spring acting crease in pressure of fluid in control chamber 56, through the supply valve and the stem |02 pro and it will be further noted that the operated iecting therefrom and contacting the release - member ||3 and device being controlled will be valve. Under this condition pressure in chamber the several diaphragms together. With the parts tioned. -‘ 1 ' ` _ ' 31 and pressure chamber 22 will beat such a low 15 also adjusted to correspond. If the operator desires to cause the member degree, for reasons which will hereinafter be ||3 to move further in the direction of »the right brought out, that piston l0 will be in contact with hand, he will increase the pressure of fluid in stop 32 and the operated member ||3 will be occupying the position shown in the drawing. chamber 56 thereby again destroying the balance 20 of opposing forces, and the structure will then operate in the same manner as above described ated member ||3 in the direction of the right to cause a corresponding new adjustment of mem hand to 'effect an adjustment of the device being If the operator now desires to move the oper ber II3. Within the limits of :the device, the controlled, he will increase, through control pipememberl H3 can thus be caused to move from 51, the pressure of fluid in chamber 56 acting on the diaphragm i5. This increase in pressure of 25 the position shown in the drawing to any se lected position to the right -hand side thereof, fluid will destroy the balance of forces above and such movement may be effected in any de mentioned, and produce a force exceeding that of sired steps, by providing in the control chamber spring 30, as a result of which the central _portions 55 fluid at the proper selected pressures. of the several diaphragms and the connecting Withthe member H3 adjusted out of its nor sleeves, etc. will move in the direction of the left 30 mal position in the direction of the right hand, hand to a position limited by contact between stops 39 on follower 38 and the non-pressure head _ if the operator should desire to cause said mem ber to move back toward the position in which 4. This movement will be relative to the member it is shown in the drawing, he will reduce the 89 and plunger 81 which are supported by the casing against movement, and as a result the re 35 pressure of fluid in chamber~55, whereupon the force of spring 30 will exceed the opposing forces lease valve 94 will remain stationary and act and acting through strut member 42 will shift through pin 95 and its head |007 and stem |02 the diaphragms and supply valve 19 in the direc projecting from the supply valve 19 to hold said tion of the right hand from the positions shown supply valve against movement, so that the seat for the supply valve will move out of contact 40 in the drawing. _ Due to the yaction of spring |0|, the release valve 94 will move with the supply therewith. Fluid under pressure will then flow valve and thus be shifted out of seating engage from chamber 5| past the supply valve 19 to ment with the plunger 81 which will be held by chamber 80 and thence to chamber 31 between spring |0| in contact with member 89 and thus the two diaphragms | I and I2 and from the latter against movement. When the release valve 94 chamber through passage 23 to pressure chamber 22. -Since the diaphragms || and l2 are of equal . is thus opened, fluid under pressure will then be released from pressure chamber 22 through pas areas, the pressure of fluid obtained in chamber sage 23, chambers 31 and 80, spaces '98, recess 99, 31 and acting on either diaphragm in one direc passages 92 and 93 in the plunger stem 88 -and tion is counterbalanced by its opposing effect on thence to atmosphere. the other diaphragm, as will be apparent. As the pressure of fluid in pressure chamber When the pressure of fiuid thus provided in 22 is thus reduced, the spring 30 will expand and pressure chamber 22 is increased sufl‘lciently to move the piston l0 back toward its normal posi overcome the opposing force of spring 30 on tion, and a reduction in the force of said spring piston I0, said piston will move away from stop 32 against the opposing pressure of spring 30 and L against the diaphragms will occur. Assuming that the pressure in control chamber 56~is not thereby act through the rod 24 to draw the mem reduced to its normal value (ñve pounds) then ber ||3 toward the right hand towards its new when the pressure of fluid in pressure chamber position. » 22, and consequently -the pressure of spring 30 The piston I0 as it is being moved under the pressure of fluid provided in chamber 22, will act 60 has become reduced to substantially the same degree as the opposing forces including the re to compress spring 30 and thus increase the duced pressure of fluid in chamber 56, said op spring force applied through follower 29 and stop posing forces will gradually shift the diaphragme 42 to the central portions of the diaphragms. and both the supply -and release valves toward When this force is increased to a degree sub stantially equaling the increase in the opposing 65 the left hand. and at the time the balance be tween opposing forces is obtained, the release force created by the increase in pressure of fluid valve 94 will engage its seat and thus prevent in diaphragm chamber 56, said spring will act further ' release of fluid under pressure from to move strut member 42, the central portions of chamber 22. Thus the reduction in pressure of the diaphragms and the connecting sleeves back in the direction of the right hand, This move 70 fluid in chamber 22 will be limited in proportion to the reduction in control pressure in chamber ment will be relative to plunger 81 and _to the 56, and the piston | 0 will therefore move the release valve 94 and supply valve 19 which are at this time supported by said plunger, and will ` member l|3 to a corresponding position. In case the operator effects a further reduc continue until the seat for the supply valve moves into contact with said supply valve. The sup 75 tion in the pressure of fluid in chamber 56 the ` 2,411,748 10 _*_mon operator’s control valve. By operating the control valve the operator could then accelerate structure will again operate as just described to eiïect a corresponding further reduction in pres sure in chamber 22 anda corresponding change or decelerate the engines in unison to any desired in position of piston 22 and of member II3. The degree. Then in case the speeds or outputs of member> I I3 m`ay be thus caused to return toward el power of the two engines were not identical, theoperator 'by ,proper adjustment of pressure of its normal position in’ any desired steps as se lected bythe degrees of reduction in pressure ofv fluid in chamber 56.' In case the pressure of iluid in chamber 56 is fluid in chamber 60 of one of the control devices' could change the speed or output of the respec tive engine to the same degree or value as that reduced to its normal minimum value of five 10 pounds, the structure will again operate in the -of the other engine. I same manner as above described to open the In such an installation, the vernier'control of one engine might be suillcient to match the two release valve 94 and permit further release of engines. At the other engine, pipe 66 would not therefore be required and chamber 60 could be tluid under pressure from piston chamber 22. Under the action of spring 30, the piston III will 15' open to atmosphere with a consequent loss oi' force for opposing spring 30. This loss of force then move back into contact with stop 32, per may however be compensated for by placing ad ditional shims ‘I2 under the spring ‘II so that the device will operate in harmony with the other thereby reduced, the normal pressure of fluid in chamber 56 plus the pressure of spring 'II will 20 device having ñuid pressure in chamber 60. In the manufacture of springs, such as spring return the diaphragms to their normal positions 30, it is substantially impossible to produce on a and seat the release valve 94 at substantially the commercial basis two springs having identical time the piston contacts stop 32, thereby bottling' characteristics. Springs are therefore 'usually the remaining ñuid in chamber 22, which pres mitting the pressure of said spring to reduce to its normal value.v As the force of spring 30 is sure may be near atmospheric pressure or of a 25 manufactured to certain limits, so that with re spect to spring pick-'up a greater degree of de i‘lection may be required to obtain a certain spring force withone spring than would be required with another spring, and as applied to spring 30, upon reducing the pressure of iiuid in the control pipe 51 to the normal value will cause return of 30 the one spring would allow greater movement of piston I0 away from stop 32 than would be per the member II3 to its normal position, as will greater degree, depending upon the coniined force of spring 30. This is however immaterial, since the return of piston I 0 to its normal position be apparent. mitted by the other spring with piston I0 subject It will now be seen that the mem to fluid at the same degrees of pressure. Stated in another way, with the maximum control pres ber II3 may be adjusted out of normal position to any selected position or in the reverse direc tion to any selected position, or may be returned 35 sure provided in >diaphragm chamber 56, and in pressure chamber 22, a spring 30 with greater pick up would permit less total movement of proper selected pressure or pressures in chambel! piston I0 away from stop 32 than wouldl occur 56. with a spring with less pick up. Consequently If the member II3 cannot be adjusted with a suiiicient degree of accuracy by varying the pres 40 the total stroke of piston I Il will depend upon the pick up of the particular spring 30 employed, sure in chamber 56, then after, what may be and in different devices or in the saine device in termed a rough adjustment in response to a se case spring 30 is changed; may therefore be either , lected pressure change in said chamber, the oper greater or less than the normal chosen stroke. ator may eil'ect s, fine adjustment of said member by effecting through pipe 66 a change in pres 45 If the member II3 is connected to a member for controlling an engine governor which latter sure in the vemier control chamber 60. An in member has a ñxed range of movement to pro crease in pressure of ñuid in chamber 60 Will in vide for varying of engine speed from minimum crease the force opposing spring 30, while a re to maximum, lthen it is necessary to provide for duction in pressure of fluid in chamber 60 will reduce the force opposing spring 30, and the 50 adjustment of the connection between the mem ber II3 and the piston rod 24 according to the device will operate in response to such increase pick up characteristic of the spring 30 so as to or decrease in pressure of fluid in chamber 60 to' limit the range of movement of member II3 to eiïect a proportional change in position of mem the i'lxed .degree in case the stroke of piston III ber II3 in either one direction or in the opposite _ direction in the same manner as before described. 55 as permitted by said spring is greater or less than said ñxed degree. This adjustment is accom It is desired to point out that for a certain change plished by the means including the eccentric I I8. in pressure of fluid in chamber 60 the change With the eccentric I I8 and adjusting disc I2II in force is only a fraction of that resulting from adjusted as shown in Figs. 6 and 1, respectively, a like change in pressure of fluid in the main control chamber 56, due to the diaphragm I5 60 the axis of the connection between the piston rod 24 and said eccentric will merely move from the being of greater area than the difference in areas position shown in Fig. 6 above the axis of the of diaphragms I3 and I4. Hence a iiner change connection between member> II3 and the pivot 4 in force and adjustment of member II3 may be to normal position by _providing fluid at the effected by varying pressure of fluidL in chamber vpin II5 o-r portion IIS thereof, to a correspond 65 ing position below, so that the movement of mem ber I I3 will be the same 'as that of piston rod 24. `This iine or vemier control> of adjustment of 60. - This adjustment of the eccentric will be employed in case the pick-up of spring 3u is normal. Now if the adjusting plate |20 is turned coun trol in unison from a master controller and it is 70 terclockwise from normal position to the extent limited by contact with stud I 23, the axis o1' the desirable to match the output of the engines. In connection between the piston rod 24 and eccen an installation embodying say two engines, both tric IIB will be moved. to and remain below the would be provided with a control devicesuch as shown in the drawing and the pressure chamber connections between member II3 and the pivot 56 in both devices would be connected to a com 75 pin II5 thereby providing for a maximum move member I I3 is of particular value in for instance multiple engine installations where the speed or power output of all engines is arranged for con . Q I v 2,41 1,748 12 11 2. A fluid pressure control device comprising a ment of pi-ston l0 in excess of the required move casing, a control spring, a powerpiston in said ment/ of member ||3. Lesser degrees of move-` casing subject to opposing pressures of said spring ment of piston I0 in excess of the required move and of fluid in a power chamber and adjustable ment of member | I3 may be obtained by suitable to different positions corresponding to different adjustments of disc |20 between normal position pressures of fluid in said power chamber, valve and the position above mentioned defined by stud means operable to supply and to release fluid un |23. Thus if the pick-up of spring 30 is less than der pressure to and from said power chamber, normal, the proper adjustment of di-sc |20 coun said spring acting on said valve means to actuate terclockwise from its normal position will match the movement of piston |0 to the fixed range of 1.0 same relative to said piston for releasing fluid under pressure from said power chamber, a con movement of member H3. trol movable member in said casing connected to On the other hand, if the pick-up of spring 30 is greater than normal which would result in said valve means and operable upon an increase less movement of piston l0 than required of mem in pressure of fluid in a control chamber above ber ||3 the disc |20 may be turned from its nor 15 a normal degree to actuate said valve means against said spring to supply fluid under pressure -mal position in a clockwise direction which will raise the axis of the connection between the pis to said power chamber, movable means in said casing connected to said valve means and subject ton rod 24 and eccentric to a point above the axis of the connection between member ||3 and to pressure of fluid in a third chamber which the pivot pin I I5, so that the lever |09 will act to 20 pressure in said third chamber coacts with pres increase the movement of .member ||3 with re sure of ñuid in said control chamber acting on spect to that of the piston rod. By suitable ad said control movable member, -and spring means justment of disc |20 to the spring 30 the fixed cooperabie with pressure of fluid effective on said degree of movement of member ||3 can therefore control movable member 'and on said movable be obtained. 25 means to counterbalance pressure of said control Thus regardless of the pick-up characteristic Spring. of the particular spring 30 used in the device, 3. A fluid pressure control device comprising a within the permissible limits of variations of said casing, a control spring, a power piston in said spring, adjustment of the eccentric ||8 to the casing subject to opposing pressures of said spring particular spring will limit the range of move 30 and of fluid in a power chamber and adjustable ment of member ||3 to the desired fixed degree, to different positions corresponding to different or will provide for obtaining such fixed degree pressures of fluid in said power chamber, valve of movement, as the case may be. means operable to supply and to release fluid After adjusting the eccentric it must be locked under pressure to and from said power chamber, to lever |09 in the adjusted condition by tighten 35 said spring _acting on said valve means to actuate ing nut |24 against disc |20. samerelative to said piston for releasing fluid Summaïy A under pressure from said power chamber, a con trol diaphragm in said casing connected to said It will now be seen that Iv have provided a valve means and operable upon an increase in relatively simple, , compact and eilîcient device 40 pressure of fluid in a control chamber above a embodying a fluid motor and fluid pressure con normal degree to actuate said valve means trolled means for controlling said motor. The against said spring to supply fluid under pressure structure is particularly applicable for control to said power chamber, diaphragm means in said casing connected to said valve means and subject and accurate adjustments of a device to be con 45 to pressure of fluid in a third'chamber which trolled, and where the adjustments are within pressure in said third chamber coacts with pres a given range, the operation of the structure may sure of fluid in said control chamber acting on be regulated to meet the range regardless of per said control diaphragm, and spring means coop missible variations in the control spring. erable with pressure of ñuid effective on said con Having now described by invention, what I trol diaphragm, and on said diaphragm means to claìinii as new and desire to secure by Letters Pat counterbalance pressure of said control spring, en , s: said valve means comprising a poppet type supply l. A fluid pressure control device comprising valve and a poppet type release valve, and said a casing, a control spring, a power piston in said power piston, said springs, and said control dia casing subject to opposing pressures of said con 65 phragm and diaphragm means being all arranged trol spring and of fluid in a power chamber and in coaxial relation with said supply and release from a remote control station to provide prompt adjustable to different positions corresponding to valves. - ’ diiîerent pressures of fluid in said power cham 4. A fluid pressure control device comprising a ber, valve means operable to supply and release casing, a control spring, a power piston in said fluid under pressure to and from said power 60 casing subject to opposing pressures of said chamber and subject to pressure of said control spring and of fluid in a power chamber and ad spring which is eiïective to actuate said valve justable to different positions corresponding to means to release fluid under pressure rfrom said different pressures of fluid in said power cham ber. valve means in said casing operable to supply power chamber, a movable member in said cas ing connected to said valve means and subject to and to release fluid under pressure to and from pressure of fluid in a control chamber which op said power chamber, said valve means comprising poses pressure oi' said control spring on said valve a poppet type supply valve, a poppet type release means and operable upon an increase in pressure valve, means providing for movement of said of ñuid in said control chamber to actuate said valves in unison, a seat for said release valve fixed by said casing, a movable seat for said supply valve means to supply fluid under pressure to said power chamber, and movable power means valve operable upon movement in one direction insaid casing connected to said valve means and to first seat said release valve and then move out of seating engagement with said supply valve and subject to pressure of fluid in a third chamber operable upon movement in the opposite direction which opposes pressure of said spring on said u into seating engagement with said supply valve, valve means. «2,411,748 13 control chamber in which pressure of ñuid ía# adapted to be varied, 'and a balance spring in said control chamber acting on the adjacent dia meansioperable upon 'further movement of said I movable seat in _said opposite direction to open said release valve, means for conducting ñuid under pressure to said supply valve for supply to said power chamber, said spring acting on 4said phragm with a force which, cooperating with V iluid in a control chamber and operable upon an pressure of fluid in said control chamber acting on the adjacent diaphragm plus pressure of »ñuid in said bias chamber effective on the difference in areas of the respective diaphragms forming said bias chamber, counterbalances the pressure ing=to provide a' bias chamber normally charged ta casing, a control spring, a power piston in said ` chamber is effective to provide a force opposing sponding to the pressure of such fluid, valve movable seat to urge same in-said opposite direc tion, a movable wmember in said casing‘connected to said movable seat and subject to pressure of increase in such pressure to move said seat in said 10 of said control spring on said power piston with both said release valve and supply valve closed. one direction, a pair of flexible diaphragms in 6. A fluid pressure control device comprising said casing connected to said seat >and cooperat- , casing subject to pressure of said_ spring and to with ñuid under pressure, one of said diaphragms being o_i' greater area than the other and so ar 15 the opposing pressure of fluid in a power cham ber and adjustable to different positions corre ranged that the pressure of fluid-_in said bias means in said casing .for controlling pressure of iluid in said chamber and comprising a supply acting on said movable member in opposition to pressure of said control spring with a force which 20 valve, a release valve and a movable member op erable upon movement inone direction to‘ñrst combined with pressure of fluid in said -control close said release valveV and then open said sup- i 'chamber acting on said movable member and ply valve to supply fluid under pressureto said pressure of fluid in- said bias chamber _effective >chamber and operable upon movement in the ‘on 4the difference in areas of said diaphragms -opposite direction to first close said supply valve ' counterbalances the pressure of said control pressure of said control spring, and spring means spring with4 said power chamber supplied with . iluid 'at a pressure corresponding to pressure of ' iluid in said control chamber. e and to then eiîect opening of said release valve ¿ for releasing iiuid under pressure from said chamber, said spring acting on said movable 5. A nuid pressure control device comprising a _ casing, a control spring, a power piston in said soA casing subject to pressure of said spring and to 'the opposing pressure of fluid in a power cham ber and adjustable to diil‘erent positions corre sponding to the pressure of such fluid, valve means in said-casing for controlling pressure of 35 ` fluid in said chamber and comprising a supply` valve, a release valve, and a movable member op «erable upon movement in one direction to ?rst close said release valve and then open said supply member urging same in said opposite direction, a‘pair of flexible diaphragms in said casing of the same areas and arranged in coaxial relation and connected to said -movable member and co operating to ~form a -ñuid pressure supply cham ber open to said supply valve and supplied with fluid under pressure, a third iiexible diaphragm 'in said casing of the same area as said-pair and , arranged ~in coaxial relation therewith and con- ' ' nected to said movable member, said third dia phragm and the adjacent one of said pair co ' valve to supply fluid under pressure to said power 40 operating to form a chamber open to said power chamber and operable upon movement in‘ the . chamber and containing said release valve and opposite direction to first close said supply valve and to -then eiïect opening oi’ said release valve for- releasing ñuid under pressure from said power chamber, said spring acting on said movable memberurging same in said opposite direction, a pair of flexible diaphragmsof the same areas and arranged in coaxial relation and connected to said movable member and cooperating to form a iluid pressure supply chamber open to said supply valve and supplied with iluid under pres sure, a third ilexible diaphragm o1 the same area as said pair 'and arranged in coaxialV relation» thereyvith, and connected to said movable mem arranged tore'ceive fluid under pressure supplied by said supply valve, another pair ofilexible dla phragms in said casing arranged at the side of , the nrst named pair of diaphragms opposite said third diaphragm and also connected to said mov able member, the -other pair of diaphragms being ` of smaller areas than the first named diaphragms> and arranged in coaxial relation therewith and cooperating to form a chamber open to said iluid. pressure supply chamber, the adjacent two of theflrst and last named pairs oi' diaphragms co operating to form a bias pressure chamber, and thev outermostof the last `named pair of dia-v ben-said'third diaphragm and theadjacent one 55 phragms having at its outer face a control cham ber in which pressure of iluld is> adapted to be ' of said pair'cooperating to form a chamber open ` varied, and a balance spring in said control to said power chamber and containin said re chamber acting on the adjacent diaphragm with lease valve and arranged to` receive uid under la force which cooperating with pressureof ñuid pressure supplied by said supply valve, _another in said control chamber acting on the adjacent pair oi’ ñexible diaphragms arranged at -the side diaphragm plus «pressureof fluid. in said bias y oi' the‘nrst named pair of diaphragms opposite chamber en'ective on> the difference in areas ofv said third'diaphragm and also connected to said movable member, the other pair of diaphragms :the respective diaphragms forming said bias being of smaller areas than the nrst named dia chamber counterbalances -the pressure of said phragms and> arranged in coaxial relation there with and cooperating to form a chamber open to control spring on said power piston with both . -said fluid pressure supply chamber, the adja said'vrelease valve and í.supply valveclosed, said lvalves being of the popnet type and said springs cent two of the nrst and last named pairs of being of the coil type, and said valves. springs and ' diaphragms cooperating to iorm a bias pressure ' power piston being all arranged in coaxial rela-~ chamber, and the outermost of the last named patriot diaphragms having at it! outer im -ß 70 tion with saidv diaphragms. y , . ' _ Om 8. KELLEY. .