US1767611A - Electrically-operated valve - Google Patents

Description

June 24, 1930 El. RoY PAYNE 1,767,611

I ELECTRICALLY OPERTED VALVE Filed March 26 1924 ZJSh'eets-Shet l June 24:, 1930.` v EL oY l.. PAYNE 1,767,611

ELECTRICALLY OPERATED VALVE Filed March 26, 1924 2 Sheets-Sheet 2 Patented June 24, 1930 umTco *fsra'ras Parser ortica EL ROY L. PAYNE, OF Los ANGELES, vcALrF'ornata., essIeNon 'ro-eas FURNAOE CONTROL OO., A CORPORATION OF CALIFORNIA y i -ELEOTRIOALLY-OPERATED VALVE' Application ined March ze, 1924. f serial' No; 702,018.

This inventionlrelatesto electrically op-y erated valves, ,and particularly to a valve actuating mechanism adapted to* bey operated or controlled from a point remote vfrom Aits location, to either turn on or oli' or to position to pass gas in a quantityor quanf ties less than its full capacity.

The present case covers improvements in my electrically operated valve mechanism shovvn and described inra co-pending application filed November 5, 1921, Serial No. 513,204. p

While the preferred specific embodiment ofA my invention-as herein shown and de#v '1% scribed-has been designed primarily for use in connection With gas heating applis ances, it, obviously, need not necessarily be confined to such a limited application, asits principles may be utilized to advantage un-V der. Emany and varied conditions .and circumstances `vvhere applicable.

Y' f My device is characterized by itscompactness,-durability, simplicity A.and 44"low cost of manufacture; .and alsoby the novel arrange mentV and :construction of the voperating' mechanism to effect this end. f In this connection, 1a notable feature of the mechanism .I employ lis vinzan arrangement for ,easily and, quickly ,adj Listing the valve opening to vary or regulate the quantityV of 'gaszpassing through'itl A further feature is the combination therewith of a practical arrangement of electrical contacts electrically connected to suitabley signal means, toy indicate the severalpositions of thevalve at la point `remote therefrom; i o

In the :following detailed description of `the: construction and operation. of f my valve vreference is `made. to-lthe accompanying drawings, Lin which the several liiguireszthereof may- `be briefly; described: as"1follo'Ws7:-f Figure 1 is a1 top plan/viewof' my .valve with thefcovernfits housing removed;=

Fig. 2 isa frontend velevation,.taken as indicated lby the line lof Fig. 1;

( F ig. 3 is a longitudinal4 vertical sectional l' vlevv taken as indicated by the line-3413 of n y Fig. 1, showing the case cover` in place;

A F ig.` 4 Aisvavievv similar to Fig. 3 taken online4--4ofFig-1,` f f Fig. 5 isa .transverse vertical sectional vievv taken on line 5-5 of Fig. 1;

Fig. 6 is a fragmentary detail view showing the parts, as in Fig. 4, in closedl position Figs. 7, 8 and 9 `are detail vievvs ofthe vswitch member carried by the camshaft;

Fig. 10 is a perspective vievv `of the valve lifting arm; Y

, y'Fig 1l is a perspective view of the cam pins carried by the cam shaft; and

Fig. 12 is a Wiring' diagram illustrating the electrical connections between the valve and signal lights. n

.'While inthe rpresent case Irinclude asthe essential elements of myvalve and its ac@v tuating mechanism,the valve itself, an electro-magnet operatively connected by a pavvl and ratchet mechanism Withgthe'valve member, to successively move it to its several positions to either turn it onor off or pass gas in different quantities; and .a system of electrical contacts-.electrically connected with signal lights, to indicate the position the valve is in,y vas in my aforementioned copending application; the particular valve, i

the lratchet .mechanism and electrical contacts'v are structurally different yfrom those included in that',:applic-atiom and in this combination and arrangement-r mayk be claimed `as improvements.4 .To thisA arrange# ment-I have added `my improvedv type of valve; lifting or actuatingvmechanism, tof gether With certain Aadjusting elements,

'whereby-'I can'eXactly regulate ,the valve openings yto :vary the passage vof gas in either full or intermediate quantities; as. vvill best suit-the particular case.

meral 12 designates the valve casing .and 13 acase or housing foranclosingf the actuating Referringv novv to. .the dravvingsithe Vnuay mechanism, to protect the latter from the elements and Vfrom dust and dirt.V

housingl is rigidly mounted upon the A'valve casing 12, as by means of screws 11;

and va cover is provided for it. The top kand front sides of the housing are thus leftl permit'easy access to the actuatingr open to' mechanism. Cover 15 maybe secured in V'place in any suitable manner. vThe opposite ends of the valve casing 12 v are internally screw-threaded for the recep- V tion of the externally screw-threaded ends respectively. Y

port-will be conical to form preferably cylindrical Y valveY member 21.

Vport 2O from` the A feed pipe 16 to of fuelA feed and discharge pipes 16 and 1'?,`

A central partition 155V divides I this partition having la the-valve casing 12; central, longitudinally disposed flat'portion 19 in `which a port 2O is cut. Preferably this a seat for a Fuel passes through the `casing 12. and tle t e Y discharge pipe VY17. Y

' A valve sleeve 22 extends through the' bottom 23, of the housingkl, and is rigidly mounted upon the valve casing 12 by its i externally screw-threaded llowery end seat-V sile spring 28 surrounds the valve stem 29V and is confined betweenfthe, collar 27 and a closure plate 3 0. on the top .of Kthe sleeve-22.

` The plate B0 may be secured in place" by screw-threads or have a Jforced lit inthe endY of the sleeve; The Vspring28 acts to nor# mally hold the valve member v21 seated inV the port 20.

y By' making the port 2O tapered or conical. and the valve member 21cylindrical, Awear on thelatter will be automatically VVtaken up and it will always forma Vgas tight iton itsseat.Y p v Y The valve stem 29 extends loosely'througli to a transversely entendingshatl 32, revolu' Y 'bly vjournaledin suitable i bearing bores inV axis of the valveimember21and its stem'29. Y

An aperture 34, slightly llargerV in diame- Y y ll Yand 41 operate fto kraiseA the valveA member 21! its iullfdistancefftoopen'fthe valve Y .Y to itsfftull capacity.".ShaftiY *isf-adapted; Y

fa, bore in the closure plate y30 and' Vcontinues VsomewhatY aboveth'e upper end ofthe sleeve 22. A cam,v lever'lfis secured 'at' one end the opposite side walls' 'of the housing 13. This mounting `permits vertical oscillationA of the lever 81', in :aV plane parallel to the ter tl'ianthesteni 29, iscutin the (lever 31 into which the sternV 29 may cXtendL`fAn ad-V justment .screw grrispcarried by .the :upper Eend of tlie^stem` 29, and a" vcollar 36 is carvrried thereon,VV intermediate its end andthe top face Voflthe lever to bridge the aper- TheY I the plane of the upper kThe object of this is so ture 311'. This provides a liitingV connection between the lever 371 and valve stem 29, yet allows the lever to be depressed below end of the stem 29.V that when the valvemember 21 is seated in the port 20,by` the action-ot the spring 28, it will not operate j to hold the lever 31 upwardly, but will per-r Vmit the latter to dropY itslfull distance, asV

shown in Fig. 6. `nother words, the connection betweenthe stem V29-and lever'l isl only a lifting connection, so that any wear upon the valve member 21 Vor port 2O will y i i y be compensated forV by thisloose connection andthe actionv ot spring 28, and will always seat properly, to make a gas tight connec-l Y tion, without any limitation imposed bya Y rigid connection'with the lever 31.

'l shaft 37 extends across the housing 13 and is revolubly journaled at each end in suitable bearngbor'es in jthe'sides VThis shaft carries a collar `38, rigidly mounted thereon, in which a plurality ot radially-disposed cam pins 39-39, 4101-410 and l1-Jil:l

are rigidly secured. Itermthese v'pins campins because they are, in effect, cams,

which successively engage the outer end ot the lever 81 to raise it and consequently litt the valve member r21 against the action of the spring 28.y Y llfhile I' have here shown l these cams to be inthe form ofpins, which is a simple and durable construction, any

Vsuitablev form of cam may be utilized for this purpose.

The pins 39 and 39, which aremounted in the collar 38 in circumferential alinement f Y and: diametrically opposed relation, are the,

shortest, and arepositioned to successively engage, upon rotationV of the shaft 37, the under'suriace of a ieXible contact plate42 on the underside ofthe lever 31. Y These of the same length-are adapted to Ylift-the valve member 21 from its seat, through the medium of'` the lever 31, one-third o'fjitsV full opening. `rilhe cam-pins Ll0 and 40a, which are likewise oi', the same length and of a flexible contact plate L13y alsosecured to theunder side offthelever PinsflO.-v l' and Ll0ab are adapted to raise thevalve mem-v ,ber two-thirds `of its lull distance, through the medium/ot the lever 31. Campins 41 and' 41%: arevV-also of equal length' and 'c mounted', in Ydiametr'ically opposed relation,

and are adapted to' engage the underiaceKV w of af contactnger on the'lever 31: vv,Pins

to be rotated Vinv the direction'indicatedby the arrows in the several figures, consequently theipins 41, 1Oand139'will engage their respective Contact surfaces on the lever 31 in inverse numerical order (although this order may be reversed) `so that the valve member 21 will be first Aopened. its full distance by the pin r41, to pass gas toits 'full capacity, and thenceyby the successive engagement kof the pins 40 and 39 with their respective contacty plates `on thel lever 31, the valve member will be closed, by the action of spring 28, first to two-thirds, and thence to one-third capacity, and thence entirely closed when the outer end orn the lever 31 rests upon the collar 38 intermediate thepins 39 and 41a or 39a and41, as shown in F ig. 6. As will be more. fully hereinafter described, the shaft 37 is to be intermittently rotated in steps of one-eighth of a revolution and consequently the valve will be open to its Vfull capacity, thence closed te two-thirds and one-third itsV capacity, thence entirely closed, twice during each revolution ol" theshaft 37.

The contact kplates 42 and 43 are preferably formed of a light spring metal and are rigidly secured at their inner ends, by any suitable means, to the under face of the lever 31. Normally these members will lie flat against the under aceof therlever and their outer ends are adapted to be adjustably held in spaced relation thereto by means of ad.- justing screws 42a and 43a, respectively. By this means the intermediate openings of the valve member 21 may be exactly adjusted to pass gas in desired quantities, without cha-nge or alteration-,of the length of the cam pins. While I have here shown the use of the contact plates 42 and 43 to adjust only the intermediate openingsoic the valve, it is nevertheless clear that such adjustable means may be easily used in connection with the cam pins 41. and 41a to also regulate the opening of the valve to its full capacity.

The shaft 37 isadapted to be intermittently rotated by'means of an electro-magnet 45, which is in the form ot a solenoid. This may"l be secured within the housing 1,3 by means of a screw46 extending" through the rearwall 47 thereof. This magnet has a core 48 ,slidably mounted therein, in the usual manner, tothe outer end cil which a hook pawl 49 is pivotally secured by means of a pivot pin 50. A ratchet wheel 51 is rigidly mounted yupon the shaft 37 in alinement with v,the core 48 andpawl 49. Specifically this ratchet wheel has an .annular channel .52 rout therein across which a plurality of wardly in position to rotate the shaft 37 one step upon energization of the magnet 45, (see Fig. 3). An arcuate' upper edge 58, just back of the shoulder 54, is adapted to engage the lower pins 53, as shown in Fig. 3, when the pawlV 49 is in itsnormal inopera-l tive position, leaving the shoulder 54 torward of the adjacent pin 53. The forward upper edge 59 of the pawl 49 isinclined downwardly to ride over the intermediate pins 53 during forward movement ofthe pawl, after it has rotated theshar't 37 one step by energization of the magnet 45. y

' The shaft 37 may be manually rotated by means of an actuating pin 60, secured at its inner end to the core 48 by means of the pivot pin and mounted longitudinally 'slidable in a bracket 6l secured to the adjacent side 33 ofthe housing 13. The outer end of the pin 60 extends through' the forward wall of the coverl5 in convenient position for manual actuation.v The outer end of the core 48 abutting against the inner end of the bracket 61 forms a stop to limit its forward movement and to stop the pawl 49 in position to engage the next successive pink 53, as shown'in Fig. `3.

1 In Fig.` 1 2 l have shown a wiring diagram including a system of electrical signals for indicating the position the valve is in, but before describing this system Iwill first describe the-arrangement of electrical contacts and connections in conjunction with the valve actuating mechanism.

A block 62 of any suitable insulating maf f terial,preferably cylindrical in configuration, is rigidly mounted upon the shaft 37. This block hasa plurality of'annular chanf nels, 63, 64 and 65 suitably spaced by intermediatewalls of the material; A plurality of resilient electrical Contact lingers 66, 67 and 68 are each rigidly secured at one end to the inner end extensions of complementary binding posts 69, 70' and 71; the latter all being suitably insulated from the housing 13 by extending througha block of insulating material 72, suitably mounted upon the said wall 33 of the housing 13. The free ends. of lingers 66, 67 and 63 are substantially conterminous and each yieldingly rides in its ren spectivech'annel 63, 64 and 65 ofthe block .62, as shown in Figs. 1 and 2. The block 62, which may be properly termed a switch block carriesa plurality et switch pins 73,

iis.

74, 75 and 73a, 74a and 75a, each spaced apart adistance of one-eighthof a revolution of Y extend across'the annular' channelsg63 Aand 64 to close the circuit by engagement withthe Contact fingers 66 `and-67 the pins 74 and 74a extend aci- oss channels 64 and 65 to close vthe Vcircuit by engagement with the lingers 67 and 68; and the pins 75'and 7 5 extend Vacross all of thechannels 63, 64 and 65 to simultaneously engage all of the ContactV lingers 66, 67 and 68.

It is to'bev noted that the switchV pins extend continuously across the channels and 'through their several dividing walls, as

clearly shown inV Fig. 7, and constitute movable switches to eiiect circuit closures Y between the several contact lingers. It is also to be noted that theseV pins are set inwardly 'from tlieperinieter ofthe switch block 62 soV the yielding ends of rthe-contact fingers will always ride in their respective channels and be'kept in proper alinement.

' Referring now to the wiring diagram of Fig.: 12, each of the Contact fingers 66, 67 and 68 is connected to a binding post 69, 70 and 71, respectively, fby wires 76, 77 and 78.

A wire 79 leads from the binding post 7() to one side oit a battery B and a wire 8O leads from the opposite side of this battery to a binding post 81, and in which a manually operable closure switch 82 is interposed. 'A wire 83 connecting with wire 77, and a wire 84 leading from binding post 81 connect with opposite ends of the coil of magnet 45. Thus, upon closure of the switch 82 magnet 45 will be energized to effect rotation ot' the shaft 37, through the mediumof the pawl and ratchet mechanism hereinbei'iore described. A. wire 85 leads from binding post (S9-'t0 one side of an incandescent lamp 86 and a wire 87 connects the opposite side or this lamp with wire 80. .A wire 88 'leads from binding post 71 to one side yoi'ianothery incandescent lamp 89 and a wire 90 connects the opposite side of this lamp with wire l80. As will be more fully hereinafter explained, when bothv the lights r86 and 89 are deenergized it will indicate that the valve is closed, when the light 86 is energized it will indicate the valve is one-third open, when light 89 is energized it will indicate that the valve is two-thirds open, and when both of these lights are energized it will indicate that the valve is open to its full capacity.

The mode of operation of the device is as follows:

1When the mechanism is in its normal in operative position, with the valve21 seated to close the port 20, the several parts aie in the position illustrated in Fig. 6; the latter i'igure illustrating thelever 31 in its rlowerniost position with its Vouter end rest- 74 and 7 4a in axialv alinement with cani pinsv 40 and 40aand switch pins 73 and'73 in axial alincinent with cam pins` 39 and 39a; so that when cach of v,the respective cam pins is in engagement with its complen'ien-- to y actuate tary end ot the leverV 31 n Y the vvalve member 21, the coriespending` switch pin will bein position to engage and 'connect the tree ends of the proper switch lingers 66, 67 and 68, toindi'cate, through the'medi'uin of the signal lamps` 86v and 89, the position the valve is in.

Assumingr the several parts to be in the positions above stated, when Vther valve isclosed,-closure of the switch 82 will effect energization of the magnet 45, causing its core 48 to be drawn inwardly andthe shatt 37 rotated one-eighth of a revolution, through engagement of the pawl 49 with the adj aceiit pin As soon as the magnet 45- is `deenergized by again opening the switch 82, or by any other means, the spring will re- Y turn the pawl 49 and core 48 forward to the position shown in Fig. 3, the inclined surltace 59 riding over the next forward pin.

This energization of the magnet will rotate the'shaft 37 to the position illustrated in F ig. 4, where the cam pin 41 has engaged its complementary end of the lever l31 and raised the valve 21 to its'ullopen position, against the action of' spring '28. Thisoperation electsmovement rof the complementary switchvpin 75 to position tol engage the 'reeends of all of the'contact fingers 66,767 and 68, and which, through the medium'of the coiinecting'contacts illuminates both of tlie'lamps 86 and 89, thereby indicating that the valve is in full open position. Vffit is desired to close the valve to two-thirds its full capacity the switch 82 is again closed,

effecting enei'gization of 'magnet 45 and .rotating shalt 37 another one-eighth 'of a llO revolution, through the medium ofV the.

aforesaid pawl and ratchet mechanism, to a point where the cani pin' 40 will be in engagement with its complementary contact 1:.

plate 43; In this movement the action of Y spring 28 closes the valve to two-thirds its capacity andthe proper switch pin 7 4 moves to Yposition to connect the free ends of switch fingers G7 and 68, thereby energizing the yopen.

cam pin 39 engages its complementary conf tact plate 42, permitting/the springy28 to4k move the valvemember 2l. downwardly to one-third its capacity. This'zoperation effects movement of the switch-pin 73 to position to engage and vconnect the ends of switch f fingers. 66 and 67 thereby energizing lamp 86 and indicating that the valve isone-third The next closure of the switch 82 rotates the shaft-37 one-eighthbf a revolution to a point where the vlever lrests upon the collar 38 intermediate the campins, as illustrated. in .Fig 6, at which time the spring 28 effect-s' seating oft-he valve member 21.5 This operation also. rotates the switch block 62 to a point -where all ofthe Contact fingers 66, 67 and 68 are restingy upon the block intermediate the switch pins,.as illustrated in Fig. l. n f

llVliile I have shown and. described the preferred specific embodiment offmy invention, I nevertheless reserve the right to make such changes or modifications inv structureas will properly comewithin the scope of the appended claims. For instance, my mechanism need not be limited to an arrangement to effect any particular `,number of intermediate openings of the valve, asit may. be arranged .to open the valvey tov any number of intermediate peints fromf'a single one to several, ywithout departing vfrom the spirit of my invention. v=Also, while I have arranged this mechanism to effect the short movements by making j eight intermittent' movements to each revolution of the shaft 37, I may either increaseoi' diminish'lthe` laetuate said valve .from closed position sucnumber of itsv intermittent movementsA as will best suit rthe particular conditions; as well as reversel the orderin which'the valveA is epenedfand closed. J s C Having. described' myf invention, I claim l; Inicombination, a valve having a stem, yielding means tovhold' .said Avalve normally closed, a cam` lever pivotallymounted adj acent said valve,.zay loose, adjustable lifting` connection between said valve'stem and lever for raising the valve against Vthe :action ci its holding means, acaml wheel adapted to vengage said lever to intermittently openthe valve or move it to .intermediate positions tov pass .gas in quantity less than its kfull capacity, andv adjusting means to individually vary the extent of eachl valve movement.

2. In combination, a valvehaving astem, yielding means to hold said valve normally closed, acamlever pivotally mounted adjacent said valve, a loose, adjustablelifting connection between said valve stem and lever for raising the valve againstv they action of its holdingv means, a cam wheel adaptedto engage said lever to intermittently open the Upon the next closure :of thek Valve or move it to intermediate positions to pass. gas in quantity less than its full capacity, adjusting means in connection with said lever to individually vary the extent of each valve movement, an electro-magnet,

and a ratchet mechanism operatively con'-y necting said magnet and camvwheel for intermittently actuating the valve.

3. In combination, a valve having a stem, spring means in connection with the valve stem to hold the valve normally closed, a cam lever adapted to engage thev valvestem to only actuate it against the .action of said spring, camr means adapted to actuate said lever to open the valve to full capacity or to an intermediate position to pass gas in quantity less than its full capacity, and adjusting means in connection with said cam klever to individually adjustably vary the extent of each valve movement.k 1

4. In combination, a poppet valve'V having a stem, yielding means to hold said valve normally closed, a cam lever pivotally mounted adjacent the valve, a loose, adjustable lifting connection between said valve stem and lever for raising'the valve against the action of' its spring, said connection being arranged to'permit downward movement of the lever after the valve is seated, a cam wheell adapted to engagesaid lever tov intermittently open the valve or move itV to intermediate position tov pass gas in quantity less than its full capacity, adjusting'means in" connection with said lever to individually varyr the extent of the several valve movements, an electro-magnet and a ratchet mechanism operatively connecting said magnet and cam. wheel for intermittently actuating the valve. 5. In combination, a valve, means to cessively to several definite, lpredetermined Hopen positions, to pass fluid in different quantities, the movement being from closed position successively toits several open positions andthen back to closed position, and adjusting means in connection 4with the actuating means whereby the extent of the f different valve openings may be separately varied. y

6.*In combination, a valve, velectro-magnetically operated. means to intermittently vactuatesaid valve from closed position successively to several different, predetermined -open positions, to pass" fluid in 'different ice , several definite,.predetermined open -posi-k G0 tion successively to several delinilo,.predetermined open positions, to passV fluid in difei'ent quantities, the movement being from closedp'osition successively to its several open positions and-then'backto'closed position, and adjustingnieans in connection with the actuating means whereby thee'iitent of the different valveropenings may. be separately rvaried. Y

8; In combination, agate valve,;yielding means to normally hold said valve closed, electro-magnetically actuated meansto actuate` said valve4 from closed position succes*- sively to several definite, predetermined open positions, to pass duid in diilerent l quantities, the movement-being from closed position successively to its severalopenpositions and then back to closed position, and adjusting means in connection with the actuating means whereby the extent ofthe different valve openings'may be separately varied.k Y

9. In combination, a gate valve, a cam actuated mechanism to move said valve from closed position successivelyto several definite, predetermined open positions,to Vpass iiuid in different quantities, said mechanism being arranged to el'ect movement from closed position Ysuccessively to its several open positions and then back to closed position, an electro-magnet, a pawl and ratchet mechanism operatively connecting said electro-magnet and cam mechanism to intermittently move the valve to its several positions, and adjusting means in connectionwith the actuating means whereby theexte'nt oitV the dilierent valve openings may be separately varied.l f i y Y l0. In combination, a gate valve, a cam Vactuatf-:d mechanism to move said valve from closed position `successively to 'several' tro-magent and-cam mechanism to intermittentlyV move the valve to its several positions, and adjusting means in connection -with the actuatingmeans.whereby thee:-`

tent of the different valveonenings may be separately varied.=` f* A. Y

ll.y In combination, agate valve, vyielding means to` hold said vvalveV normally closed, a cam actuated mechanism to move said valve from closed position successivelyV Vto tions, to pass iiuid in dilerent quantitieaa cam actuatedmechanism to open said valve or move it to its several openipositions, said vmechanism being adapted to movethe valve from closed positionsuccessively toits severalopen positionsl and then 'back to closed position,l an electro-magnet, a pawl` and ratchet mechanism operatively connecting said: electro-magnet and cam mechanism to intermittently"actuate the valve, Vand adjusting means in connection with the actuating `means-whereby the extent of the diierent valve openings may be separately varied. l2. In combination, a gate valve, yielding means to normally hold said valve closed, a cam actuated mechanism to moveV said valve from closed position successively to several definite, predetermined open positions, to pass fluid in different quantities, said mechanism being adapted to move the valve from closed position successively to its several open positions and then Aback to closed position, an electro-magnet, a pawl and ratchet mechanism operatively connecting said electro-magnet and cam mechanism to intermittently actuate the .-valve, andv adjusting means in'connection with the actuating means whereby the extent of the didonent valve openings may be separatelyrvaried. 13. In; combination, a' gate valve, a cam lever pivot-ally'mounted adj acent said V,valve and operatively connected therewith, cam means adapted to engage said lever to move said valve from closed position successively to several definite, predeterminedopen positions, topass fluid in different quantities, said means being adapted to move the valve from closed positionsufccessively to its several open positions and 'then back to closed position, an electro-magnet,"means operatively connecting saidelectro-magnet and cam means to ,intermittently lactuate` the valve, and adjusting `means in connection with the actuating means whereby the extent of the differentvalve openings Vmay be separately varied. n Y

llhln combination, a gate valve, yielding means tolhold said valve normally closed, a Acam lever pivotally mounted adjacent said valve and operatively connected therewith, a plurality of' cam elements adapted to successively engage said lever to move the valve from closed position successively to several diierent open positions, to pass fluid in different quantities, said elements being arn ranged to move :the'valve-from'closedposij tion successively to its several open positions and then back to closedposition, an electromagnet, a pawl and .ratchet means opera- 'tive'ly connecting said Vmagnet and cam means to intermittently actuate the valve,

ico

'and adjusting Ameans in connection with the actuating means whereby the extent of the different valve varied. f

means to hold said valve normally closed, a cam lever pivotally mounted adjacent said valve andy operatively 'connected therewith,

.openings vmay be Aseparately y a plurality of cam elements adapted to suci cessively engage saidlever tomove the valve '15. In. combination, a gate valve, yielding '-1525y from closed position successively to its several different open positions, to pass Huid in different quantities, the movement in each v case being from closed position successively 5 to its several open positions and back tov closed position, an, electro-magnet, a paWl and ratchet mechanism loperatively connecting said magnetand cam elements to intermittently actuate the valve, and adjusting l0 means in connectionv With the actuating means whereby the extent of the different valve openings may be separately varied. Y In Witness that I claim the foregoing I have hereunto subscribed my name this 28th day of February, 1924.

EL ROY L. PAYNE.

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