US2847020A - Control mechanism - Google Patents

Description

A I iorney.

Aug 12, A195.8 P. E. ANDERSON ET'AL CONTROL MECHANISM Filed Jan. 12, 1953 RE. ANDERS@ Em 2,847,020

l"-Aug.12,19.f;

I CONTROL MECHANISM 5 Sheets-Sheet 2 Filed Jam. 12; 195s INVENTORS STEPHEN SMM 2 BYPUL E /VDSCN zorney.

Aug.' 12, 1958 A P. E. ANDERSON ET' A: y 2,847,020

CONTROL MECHANISM 3 Sheets-Sheet 5 Filed Jan. 12, 1953 X INVENToRs.

l STEH'vE/V 5MM 8 l BYPUL E. ANDERSON.

` orney.

United States Patent O" CONTROL MECHANISM Paul E. Anderson, Los Angeles, and Stephen A. Stam, Glendale, Calif., assignors to Harvey Machine Co., Inc., Torrance, Calif., a corporation of 'California Application January 1'2, 1953, serial No. 330,822

7 Claims. rc1. 137-36) This invention has to do with a control mechanism and it is la general object of the invention to provide a simple, practical, improved control mechanism suitable for the handling or controlling of lluid and which is responsive to iluid pressure and also to speed.

It is a general object of this invention to provide a control mechanism providing for accurate or delicate control of llow and wherein thereis a primary control or regulating means in the nature of a sleeve type valve responsive to uid pressure and a second, or modifying, control responsive to speed.

It is another object of this invention to provide a valve mechanism which is of such form and construction as to be practical in various machines or under various working conditions. In a typical situation the valve mechanism of the present invention can be used to advantage in a power generator as where the speed of a driven part is to be governed and where the valve of the lcontrol mechanism is responsive to uid pressure While the linal governing action is gained by `means responsive to the speed of the driven element.

lt is another object of this invention to provide a valve mechanism of the general character referred to including not only the control responsive to uid pressure and the control responsive to speed but also having or including a prime mover, say for example an electric motor, by which the latter means is driven so that the speed factor is determined by the rate yat which the prime mover is operated.

It is a further object of this invention to provide a valve mechanism of the general character referred to including a combination and arrangement of parts which results in :a simple, compact, dependable mechanism which is elfective and accurate in operation.

It is a further object of this invention to provide a valve mechanism of the general character referred to wherein the metering means is characterized by a sleeve-type valve, while the speed responsive means is such as to include a pressure relief valve located within the sleeve valve.

Another object of the invention is to provide al valve mechanism of the general character referred to wherein f the sleeve valve of the meter incloses elements of the speed responsive means including a pressure relief Valve and a means or mechanism adapted to be operated by, or which is responsive to, centrifugal force.

The mechanism provided by the present invention is characterized by a meter, preferably formed by an annular seat, with fluid passing orifices therein and a sleeve valve cooperating with the seat. A member is provided to operate the sleeve valve and is actuated by, or is responsive to fluid pressure, say for example the pressure ofthe fluid being handled by the valve. A speed responsive means is provided to vary or control the action of the meter and in a typical construction includes primarily a propeller shaft, a pressure controlling valve, say for example a relief valve controlling the pressure acting upon the pressure responsive means of the meter. A drive or coupling oc-` curs between the propeller shaft and valve of the speed responsive means and includes an element adapted to be 2,847,020 Patented Aug. 12, 179.58

ICC

2 operated by centrifugal force and serving to Work the desired actuation of the valve of the speed responsive means. So far as the broader principles of the invention are concerned, the propeller shaft of the speed responsive means may be driven in any suitable manner and as an example in one situation it may be driven by structure actuated by or responsive to the fluid controlled by the throttle or, as is more specically set forth in this application, it may be driven by a prime mover which is under control so that its speed of operation can be varied at will. y'

The various objects and features of my invention will be fully understood from the following detailed description of typical preferred forms andapplications of the invention, throughout which description reference is made to the accompanying drawings, in which: l

Fig. 1 is a longitudinal, central, detailed sectional View ofl a mechanism as provided by the present invention. Fig. 2 is a transverse sectional view takenas indicated by line 2-2 on Fig. l. Fig. 3 is a view of a portion of the structure shown' in Fig. l-showingthe parts in a different rotative position. Fig. 4 is a transverse sectional View of the parts shown in Fig. 3 being a view taken as indicated by line 4-4 on Fig. 3.` Fig. 5 is al somewhat diagrammatic view or lay out of-the peripheral portion of the plate element included'in the throttle construction. Fig. 6 is a view of the type illustrated in Fig. 5, illustrating the seat element of the throttle. Fig.y 7 is a reduced sectionaly view taken substantially as indicated by line 7-7 on Fig. l. Fig. 8 is a perspective .view illustrating a part of the mechanism and particularly the plate ofthe meter mechanism, the lay out of which is shown in Fig. 5 and showing this portion of the structure separate from the other parts. Fig. 9 is a reduced view including structure as illustrated in Fig. l -and .showing additional mechanism that `may be incorporated in acarrying out of the invention'where the speed responsive means is responsive to or driven by .structure propelled by theuid controlled by the meter and Fig. 10 is a view illustrating an embodiment of the invention wherein the speed of responsive means is responsive to orwdriven `by a variable speed prime mover having nootherV connection with or relationship to the other parts of the structure.

Referring to the form of the invention illustrated in Figs. l tor 9, it will be observed that the valve or control mechanism, as provided by the present invention, is incorporated in a machine which is essentially a power generating unit. This particular machine or generating unit ismore specifically set forth, and is claimed in our copending application entitled Fluid Driven Power Unit, led on even date herewith Serial No. 330,821.

The mechanism embodying the present invention is shown as including generally a body A characterized by a middle or central section X, a forward or front end section Y and a rear end or shaft carrying section Z. vA rotor B is mounted in the body A with its axis concentric with the longitudinal axis' of the body. Bearings 10 and 11 support theurotor in the body A. The body section Y is at what will be termed the front or forward end of the structure and serves as a conductor ofthe fluid being handled. r

The present invention provides a meter C adapted to control the iluid handledvby the body and in the particular case under consideration the control C controls the llow of huid to a flow directing or nozzle means D which serves todirectthe fluid onto the rotor B to effect driving thereof. The meter C in the form illustrated is characterized by an annular seat 12 and by a sleeve valve 13 that cooperates with the seat. A uid pressure actuated element, preferably a piston 14, is related to the valve 13 and is preferably carried by and located Within the valve 13 and the pressure of the lluid handled'by the body 3 section Y acts upon the piston 14. A spring is provided to normally yieldingly hold the valve 13 in an open position.

The Ypresent .invention .provides a .speed responsive means E :tocontroltor regulate Vtheaction of the :meter and in vtheform ofQtheinvention under consideration the 4 means QE- iucludesapropeller shaft 20, a lluid handling valve, 21 .in `the nature of a pressure releasing valve and acoupling or Yoperatingvnleans between the shaft and theavalve 21 characterized byl one Vor more velements 22 .adaptedto be actuated bycentrifugal force to effect operation Vof the valveg21.

In the ,.particulai--formof the invention under consideration the propeller shaft 20 of the4 structure as .provi'declgby` the present .invention is driven by or with the rotor-.B, factuatedi bythe fluid; controlled by the meter C. .Inthe particular arrangementillustrated there is a driven shaft F supported'fby'bodysection Cv through kan antiyfriction 'bearinggz .andi there is a drive. means G connecting the rotor Byand the, shaft F. In the arrangement 1i1lustrated;the :propeller shaft .20V of the means D is conneetedzor coupledto art-element of the drive G so that the shaft 20-.isdrivenin synchronism .with the rotor B and the` shaft'Y F with the. result that the speed .of operation Voftheseparts serves as or effects control of the meter C.

`In the .preferred construction the several sections X, Y 'and'Z of body. A are made separable to facilitate manufacture. and assembly and they are shown as joined by suitable fasteners 30.

:The main or/-mddle section X of body A is provided with or includes a central tubular core 31 that carries the bearings 10'and 11- supportingthe rotor B. The rotor Bis located-in the main orgcenter section X Iof body. A and-ischaracterizedby a tubular shaft 32 and av-Wheel v3ft-(mythe shaft.y and provided at its periphery lwith blades' 34.

-The-wheel33 yis located'on the forward end portion ofvrotorA shaftz to be adjacent or immediately rearward of thenozzle means D which is carried' by'or located in the -f'orward `endportion'of body section X. The nozzle means Dis characterized by a plate. 40 Vfixed in the forward'end portion of body section X. Theplate 40 has a*supporting.ilange 41 arranged between opposed portions 'ofthe'bo'cly sectionsX and Y and fasteners 30 join or connect these parts. The plate 40is providedwith va forwardly 'opening annular recess 43 Aand .it has a plurality of., radially "disposed, ports'444'outw`ard of the recess. A plurality ofnotch like V`openingsj45 are vprovided in the outer'or peripheral portion fof' the plate -40 and. these openings connect with the ports 44 andopen at .the rear side ofrplate40. .The 0pnings45 are shaped or formed so that they establish `nozzles th'atl handle the fluid passed from the recess43 to the ports 44, and,as will be noted fromliggS ofthe-drawingstheymay,y in practice, be shaped andproportione'd toA be highly eliicient or effective in directing the' Huid to vthe bladesY 3.4. of. 'the rotor so .that the rotor is ,efliciently driven" by the uid.. In. theparticularjconstruction 'illustrated an annular member or linerf46 is carried in thejforwardend portion of the bodyl 'sectionX so that itisurroufndsithe. peripheral. portion of theplate'tll'V having the'prts 44 and nozzle. openings Aetherein. The liner, in effect, closes the outer ends of the ports and forms an outer.,.wallffor the nozzle openingSjllfS. In the arrangementillustrated: there is a single nozzlieopening 45 inv communication with each radial pQrt=44andatthelrear side of theplate40 there are drag relieving recesses.f47..between adjacent `openings 45 as clearlyillustrated-inlig-S of the drawings.

, Thelmeter. or. metering means .as provided; by thepresent invention.mayinjpracticevary widely/in; form and Gonstruction. .In they case under consideration the. means .ischaracterized- ,by asleeve-typeislide valvethat is not afectedby .varyingwuid-pressure and. the mechanism includes the annular seat 12 which is shown carried by the plate 40 so that it occurs between the recess 43 in the plate and the port 44 in the plate. In the particular case illustrated the seat 12 has orifices provided in or through it, one opening into each port 44, and the orifices vary in size or capacity. In the preferred form of construction each orifice has a forward Wall 52 which is straight and disposed in a plane normal to the longitudinal axis of the structure, a rear wall 54 which is straight, but pitched or inclined relative to the plane just referred to'and it has side walls 53 which are straight and parallel and which extend longitudinally or axially of the structure. The several front or forward walls 52 `of the orifices 51 are in a single or common plane normal to the axis of the structure while the rear Walls 54 of the orices are spaced varying distances rearward of the walls 52 so that the orifices 51 are of different extents axially of the structure. In the particular case illustrated the sidewalls 53 of; the several orifices are spaced equal distancesapart so that all of the orifices are of vthe samesize orextent circumferentially of the valve seat.

The valve 13 is a balanced valve and in the formunder consideration is arsl'eeve rvalve and its rear end portion, which 'is its `flow controlling portion, is slidably engaged in the annular valve seat 12. The rear end 55 of` the valve 13 is straight or in a plane normal to the longitudinal axis of `the stmcture and when the valve is open the end 55 thereof is in line with the front walls 52.1of the orifices 51 in the seat. The valve 13V is supported. to slide or reciprocate and as it is operated or moved yrearwardly the end 55 will move rearward in the seat.12 to cut-down the effective size lof the orifices 51 and will. completely cut out or close the orifices one after another. When the valve v'has moved to an extreme rearward position it will have closed'all of the orifices. In the form ofthe .invention illustrated the valve 13 is supported by or.frorn a forward extention of the plate 40. The extention 60 is illustrated asl a separate or detachable part joined to the plate by threaded connection 61 and .it is located centrally of the structure and extends into the valve 13 with substantial clearance. A rear radial flange 62 projects from the extension 60, supporting the rear portion of valve13 and a forward radial flange 63 projects from the extension 60 and supports the forward portion of thevalve 13. In the particular case illustrated the forward flange 63 is carried on a head 64 which is applied to the'forw'ard or terminal end portion lof extension 60 where it is vthreaded onto the extension and set or locked by means of a retainer 65 threaded onto the extension 60 isa tubular element and theretainer 65 is in the nature of a cap closing the forward or terminal end of the extension. The head 64 is provided with a stop llange 66 which serves as a stop limiting forward movement of valve 13 and stops the valve in the open positionas shown in Figure 1l of the drawing.

The lluid pressure actuated element of the meter C, which in this case is the piston 14, is located inthe valve 13Y and is located between the valve supporting flanges 62 and 63. The piston is rigid or fixed `relative to the valve 13 and projects radially -inward therefrom to slidably fit around the extension 60.

The spring- 15 provided to normally yieldingly hold the valve 13` open is preferably-a helical spring surrounding extension 60 and located within the valve'13 between the flange 62v and the piston-14. In the preferred construction a cushioning spring 68 is provided within the valve and around the extension -60 between the piston 14 and the flange 63.

In accordance with the-present invention iluid handled by the structure is admitted into body section Y as for instance through an inlet port 70 provided in the forward end of section Y. The fluid may -be supplied to the struc ture from any suitable source lasfor instance by means of. a suitable supply. duct.

In accordance with the invention the uid admitted into the body section Y is conducted through the body section and around the valve 13 to the gear end portion thereof where it is passed by ports 71 in the valve to enter into the rear end portion of the valve and to flow therefrom into the recess 43.

In accordance with the invention the uid being handled by body section Y is employed to actuate or operate the meter C so that the meter is responsive to lluid pressure and more specifically is responsive to the pressure of the fluid being handled by the meter. In the case illustrated the uid being handled by the body section Y to be controlled by the valve 13 is admitted to the piston 14 to act thereon. In the case illustrated notch like ports 75 are provided in the stop llange 66 so that the fluid under pressure is admitted into the rear end portion of valve 13 and one or more ports 76 occur in the forward flange 63 so that the fluid under pressure is admitted between the flange 63 and the piston 14 to act on the piston and' rearwardly against the resistance of spring to closev down or possibly completely close off one or more of the orifices 51 in the valve 12.

The speed responsive means D provided by the present invention is such as to control or regulate the action of the meter C and in the form illustrated is characterized by a uid controlling valve 21, by a rotating element or propeller shaft and a coupling or operating means between the shaft and valve characterized by one or more elements adapted to be actuated by centrifugal force and serving to operate the valve.

In the form 0f the invention under consideration the shaft 20 of the means D is located centrally of the structure and the valve 21 is located centrally of the structure and within the valve 13 of the throttle C. In fact, the valve 21 is located within the extension 60 which is the support for the valve 13.

In the particular case illustrated the valve 21 is characterized by a seat member 80 located in the extension 60 and a reciprocating valve element 81 operating in the central opening or bore 82 extending through the seat element 80 longitudinally of the structure. The seat element is shown threaded into the extension 60 and the opening 82 provided in the seat element to carry the valve element 81 is in communication with the space or fluid carrying chamber 83 that occurs between the flange 63 and the piston 14. In the case illustrated a lateral port 85 is provided in the extension communicating with the space between ange 63 and piston 14 and an annular recess 86provided in the exterior of the valve member 80. Radial ports 87 in the valve member connect the external recess 86 with an internal recess 87 which communicates with the opening 82.

The valve element 81 has a stem portion slidable in the opening 82 and longitudinal fluid handling passages v90 in the exterior of the stem portion of the .valve ele- `ment are maintained in communication with the recess 87. The passage 90 extends longitudinally of the valve element 81 to terminate so that when the valve is in a forward position the rear end of the passages occur within the opening 82 so that flow through the passages is stopped or cut off whereas when the valve element 81 is moved rearwardly the passages 90 will gradually uncover and consequently allow ow or escape of fluid from the passages at the rear of the valve element 81.

. .A spring 91 is provided to normally yieldingly urge the valve element 81 rearwardly or to a full open position and in the case illustrated spring 91 is located between the forward to terminal end of the valve stem and a plug 92 threaded into the forward or terminal end of the extension 60. From the foregoing description it will be apparent that the valve 21 is a lead or pressure release valve that is normally open. The valve 21 controls the ow or escape of fluid from the space or chamber occuring between flange 63 and piston 14 and as the fluid is passed by the valve 21 it flows forward through the extension 60 to discharge through ports 90a in the forward end portion of the extension 60 to enter a chamber 101 in the main section X of the body A which chamber is in communication with an exhaust port 102.

The shaft 2li in the form of the invention under consideration is located centrally of the structure and extends through the tubular shaft 32 of the rotor B. The shaft 20 projects forward from the rotor and its forward end portion is supported in an anti-friction `bea-ring located in the rear end portion of extension 60.

The coupling or means connecting shaft 20 and valve 21 is located within the extension 60 so that it is likewise within the Valve 13 and it is located rearward of the valve 21 so that it is between the valve 21 and the forward end of shaft 20.

In the form of construction illustrated in the drawing the coupling between shaft 20 and valve 21 includes opposed plates and 111 delining a chamber 112 in which one or more members 113 are located and are so carried as to be subject to or operated by centrifugal force. The plate 110 is carried on or fixed to the forward end of shaft 20 while the plate 111 is mounted on an extension or stem portion 115 of valve element 81 through an antifriction bearing 116. The plates 110 and 111 have opposed and spaced faces and in accordance with the present invention at least one of these faces is pitched or conical in form. In the case illustrated both of the opposed faces of the plates 110 and 111 are conical or pitched so that they define a chamber 112 which is outwardly convergent as clearly illustrated in Figs. l and 3 of the drawings.

The elements or members 113 adapted to be actuated by centrifugal force are preferably balls arranged in an annular series between the plates 110 and 111. The balls are engaged with or `confined between the opposed faces of the plates. The construction includes a drive means between the plates 110 and 111 and in the case illustrated this means includes drive arms projecting forward from plate 110 to enter openings 121 provided in the plate 111. This construction provides a drive between the plates so that the plates operate together or in synchronism and it allows for axial movement of the plate 111 relative to the plate 110.

As the shaft 20 is rotated the plate 110 on the shaft 20 is likewise rotated and the plate 111 turns with the plate 110 because of the construction just described. As the structure rotates the balls 113 are acted upon by centrifugal force and move, or tend to move, outwardly. As this action occurs there is a wedging action tending to force the plate 111 forward relative to plate 110 and this forwardly acting force is opposed by the action of lthe spring 91 that normally tends to hold the valve 21 open. When the forward force created by centrifugal force is suflicient to overcome action of the spring 91 the Valve element 81 is moved forward and if the centrifugal force is great enough the valve 81 may be moved forward to a position where the passages 90 are closed so that there is no flow or escape of uid through the valve 21.

In the construction illustrated a core of a lubricant carrying material is located centrally in the mechanism just described and in practice the core 130 may be a body of felt or the like carrying a suitable lubricant and it may be carried by and between the plates 110 and 111 centrally of the mechanism as clearly illustrated in the drawings.

With 'the speed responsive means related to the throttle in the manner hereinabove described there is normally bleeding or escape of pressure that would tend to operate piston 14; however, as the speed of the shaft 20 increases the bleeding or escape of pressure is retarded with the rea sult`that -thepressure-increases on piston 14V causing valve 13 tormoverearwardlyV and thusV cut down thegow occuring through the orifices of seat 12., When the speed` of th'e-shaft20 reaches a predetermined value there will be suchioperation of the structure as to cause choking of the fluidthrough valve 21 sufficient so that there is pressure on piston 14 Venough to operate valve 13 so that the' flow through the orifices of seat 12 is cut down to a predetermined value. In the particular case under consideration the shaft 2l] of the speed responsive means is coupled tothe rotor so that the action of the speed responsive meansis such as ltogovern the throttle so that the rotor operates at a predetermined speed.

The bearing 25, carried by section Z of body A, is an anti-friction-bearing and rotatably supports the driven shaft F so that `it is concentricwith the longitudinal axis of themechanisrn that Vis with the rotor and with the propellershaft 20 ofmeans E. The shaft F is shown projecting rearwardly from the bodyy and into a'housing 120 vattached vto the body Al and projecting rearwardly therefrom.

'The drive G provided for driving shaftFzfrom the rotor B is shown as including a counter shaft 131 supported in the body A by anti-friction bearings 132 and 133. The counter shaft 131 carries a gear 134 that meshes with a drive pinion formed by teeth 135 provided on the rotor shaft between bearings and 11. The gear 134 is substantially larger than the pinion formed by the teeth 135. A pinion 136' is provided on the counter shaft 131 and meshes with and drives a driven gear 137 which is concentric Awith the shafts 2t), 32 and F. The gear 137 has a forwardly projecting annular ange 138 receiving an anti-friction bearing 139 carried on the rear end of the rotor shaftY 32. An extension 140 in the form of a sleeve projects rearwardly from gear 137 ,and eX- tends -between the bearing 25 and the forward end of shaftfF. A driving connection is established vbetween the gear part 140 and the shaft F bymeans of splines 150 on the engaged or overlapping parts.

The body `section vX is provided with walls 141 Awhich define a chamberr 142 housing parts such asy the counter shaft and the gears and serving to carry a lubricant. In carrying out the invention it is preferred to provide a paeking'means or seal 155 between the retainer 156 that holds bearing 25 and the shaft F so that there is noleakage from the rear of the body around the shaft F. Itis also preferred to Vprovide a packing means 156 between the forward end of the tubulary core 31 and the shaft `32 of the rotor. Further, a packing -means 157 is provided between the gear 137 and the rear end of the rotor shaft. They means 157 seals the end ofthe tubular rotor shaft.

vWith a construction of the character `justY described it is advantageous to couple the propeller shaft of means E toa -partsuch as the gear 137 so that the shaft 20 rotates at the same Vspeed as the driven shaft F. In the case illustrated the rear end'of the propeller shaft 20 is engaged with4 the gear 137 andra driving connection i'sestablished between these'parts bymeans of splines 160.

From the foregoing description it will be apparent that the valve mechanism providedY by the present invention, which mechanism is characterized by the means C and E, operates so that it isresponsive to the'pressure of uid handled by the body and also the speedV of rotation of the shaft which, in this case, is driven by the element operated by the uid controlled by the valve mechanism. It will be apparent that the pressure on the fluid handled by the body ywill act on piston 14 of means 'C normally tendingto'close the valve 13 and as the speed of the propeller shaftA increases the bleed valve 21 is closed so that by the time the shaft 21 reaches a predetermined speed the structure is set or regulated so that thegright amount of iiuid is passed by the valve 13 through the seat 12 -to effect driving of the rotor B at the desired speed.

In the form 'of the invention illustrated'fin ul0 the meter C-'and the means D maybesubstantiallythe same ashereinabove described. It is tobe observed, however, that the shaft 20-A of the speed responsive means is, in this case, in no way related to action resulting from the passage of liuid by the valve 13. Invfthis case the valve 13 passes the uid directly -into a chamber 101-A provided in the body A there being no rotor in the structure and no nozzle meansl D such as is present'in the form of the invention firstv described.

In the form of the invention under consideration the propeller shaft 20-A projects from the rear of the body A and is adapted to be driven by a prime mover. In the drawings a motor M is shown directly applied` to or coupled with thepropeller-,shaft 20-A and theI motor is shown co-upled in a control circuit carried by lines 180. The circuit is shown as energized by a generator 184 and is shown as including a variable resistance or control 182. The motor is a variable speed motor responsive to the control 182. As a result of this arrangement and relationship of parts it will be apparent that the speed of the propeller shaft 20-A may be varied as desiredl by actuating the control 182 and the action of the means lD is thereby governed or subject to control to regulatefor vary the manner in which the means D con'- trols or varys the action of the .meter vC.

Having described only typical preferred forms of construction and typical manners of carrying out the method of our invention, we do not wish to be limited or-restricted to the specific details herein set forth,but wish to reserve to our selves, variations or modications that may appear to those skilled in the art andfalljwithin the scope of the following claims.

Having described our invention, we claim:

l. A throttle valve mechanism for controlling the'rotative speedof turbines and the like, including, a` valve body adapted to receive the ow of uid underepressure at one end thereof, a balanced sleeve type valve element shiftably carried in the body and urged toward a closed position in response to thel pressure of thel said uid and-adapted to deliver the-ow of said uid from the other end of the body, means normally yieldinglynrgi'ng the valve element toward an openposition, and a control adapted to vary the position of the valve element including, a pressure bleed valve adaptedto vary the pressure of uid acting'on said valve element, a shaft adapted to be rotated by said turbine, and means connecting the shaft and the pressure bleed valve, including a member rotated by the shaft and adapted to be operated by centrifugal force to operate the pressure bleed valve.

2.. A throttle valve mechanism for controlling the ow of fluid under pressure to turbines and `the like, including, an annular seat with a series of ori'ces therein, a balanced sleeve valve cooperatively .related to the seat and adapted to progressively open and close said orifices and varying ow of ud under pressure through the seat, means urging the sleeve valve toward an open position, a .pressure responsive element actuated by theysaid uid pressure and operating the sleeve valve toward a 'closed position, and a speed responsive means driven by the turbine and varying the pressure of uid acting upon said element including a fluid controlling valve located within the sleeve valve.

3. A throttle valve mechanism for controlling the ow of uid under pressure to turbines and the like, including, an annular seat with a series of orifices therein, a balanced sleeve valve cooperatively related to the seat and adapted to progressively open and close said orifices, and varying ow of fluid under pressure Vthrough the seat, means urgingl the sleeve Valve toward an open position, a pressure responsive element actuated by the said fluid pressure and operating the sleeve valve toward a closed position, and a speed responsive means driven by the turbine and varying the pressure of fluid actingl upon said element including, a fluid controlling valve located within 9 the sleeve valve, and a means responsive to speed of rotation and operating the controlling valve and located within the sleeve valve.

4. A throttle valve mechanism for controlling the ow of fluid under pressure to turbines and the like, including, an annular seat with a series of orices therein, a balanced sleeve valve cooperatively related to the seat and adapted to progressively open and close said orices and varying ow of uid under pressure through the seat, means urging the sleeve valve toward an open position, a member carrying the seat and extending into and supporting the sleeve valve, a pressure responsive element on the sleeve valve and actuated by the said uid pressure and operating the sleeve valve toward a closed position, and a speed responsive means driven by the turbine and varying the pressure of uid upon said element and including a pressure controlling valve within said member.

5. A throttle valve mechanism for controlling the flow v of fluid under pressure to turbines and the like, including, an annular seat with a series of orices therein, a balanced sleeve valve cooperatively related to the seat and adapted to progressively open and close said orifices and varying ow of uid under pressure through the seat, a member carrying the seat and extending into and supporting the sleeve valve, a pressure responsive element on the sleeve valve and actuated by the said lluid pressure and operating the sleeve valve toward a closed position, and a speed responsive means driven by the turbine and varying the pressure of fluid upon said element and including, a pressure controlling valve within said member, and a speed responsive mechanism located within said member and operating the controlling valve.

6. A throttle valve mechanism adapted to control the ow of uid under pressure from a single stream of iluid to individual fluid handling ports delivering separate streams of fluid to a turbine, including, an annular seat with a series of orifices therein and each orifice being related to and in communication with one of the said ports, an annular sleeve valve cooperatively related to the seat and adapted to open and close said orifices and controlling ow through the seat, a pressure responsive element on the sleeve actuated by the said uid pressure to operate the sleeve valve toward a closed position, means urging the sleeve valve toward an open position, and speed responsive means driven by the turbine and varying the pressure vof the actuating fluid against the element on the sleeve, the orifices being varied whereby they are opened and closed progressively as the sleeve valve is operated.

7. A throttle valve mechanism adapted to control the ow of duid under pressure from a single stream of fluid to individual iluid handling ports delivering separate streams of uid to a turbine, including, an annular seat with a series of orifices therein and each orice being related to and in communication with one of the said ports, the orices being in an annular series extending around the seat, an annular sleeve valve cooperatively related to the seat and movable axially of the seat and adapted to open and close said orifices to control ow of uid through said orifices, a pressure responsive element on the sleeve actuated by the said uid pressure to operate the sleeve valve toward a closed position, means urging the sleeve valve toward an open position, and speed responsive means driven by the turbine and varying the pressure of the actuating uid against the element on the sleeve, the orices being varied in extent axially of the seat whereby they are opened and closed separately and progressively as the sleeve valve is operated.

References Cited in the le of this patent UNITED STATES PATENTS 463,623 Eichbaum Nov. 24, 1891 817,153 Barr Apr. l0, 1906 822,887 Emmet June 5, 1906 1,284,845 Wiberg Nov. 12, 1918 1,662,858 Hume Mar. 20, 1928 2,145,117 Keller Ian. 24, 1939 2,177,063 Gottlieb Oct. 24, 1939 2,500,618 Pugh et al Mar. 14, 1950 FOREIGN PATENTS 112,466 Switzerland Nov. 2, 1925

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