US1762120A - Operating mechanism - Google Patents

Description

June 3, 1930. H. E. GxN-rHER 1,752,120

OPE-RATING MECHANISM Filed Jan. 24, 1928 Patentedvlune 3,1193()Y f HOWARDEGINTHER, on LAPORTE, `rNnLsiNA, AssI'GNoB. To BAsTrANMonnnYoog-0F ALA PORTE; INDIANA; A- ooRfPoRATIoN on INDIANA` I Y i OERATNG M CHANisM i.

This invention relates toaniniprove'dfther;

niostatically controlled mechanism. for operating and controlling a valve@` One object of the invention an improved mechanism of this character 'havingv multiplying levers WhichV arefre la .tively simple in .f construction and which are anranged andV yrelaxed to swingV freely .to ac-l tuate or controlthe valve element 'at alltinies.

Another object of the inventionis to convstruct a. valve operating ymechanism having parts which may. be economically manufac-` turedandvreadily assembled. o

VAIlOtherobj ect of the'finvention is D C011- struct an improved mechanism ot this charac# ter in which the supporting pivotsjforvits levers are dis-posed out ofthepath of the corn-4 1 bustiblernediumpassing through the casing enclosing such mechanism, so that-the heavier ingredients andforeign matter in the con1 vbustible medium cannot collect on the pivots and' affect the free swingingof vthe levers. A further obj ect vofthe invention istorno.v :vide an improvedinechani'sin olithis character comprising a` minimum `numbervv Vof vparts ,soy arranged and constructd .that the casingy I `therefor may berelativelysmall and"s ,haped` iouperrnit unobstructed lOWfOf the combustible f mediurn through it', thus; avoiding Vthe 'danger' of foreign ina-tten anclgheavyingre` l clients in the combustible Inediiun acciunu'lat-V lingn thecasi-ng.`

G ther objectsV of thefinvention Will beap-f paren-t tothose Skilled in theart towvh'ich my; invention relates. fromthe .following descripf tion taken in.connectionwiththeaccornp'anying drawings, wherein.

Fig l' 'sia vlevv, partly'in Yelevation partly in section shovving'- a WaterheateI- of 'the storage type havinga burner and a'.ther

inostatically controlled rnechanisrn enibody1` shown 4in Fig. `2,

ment unseated;Vj

ing 'my invention for .operatingthe lvalve in Y the supply pipe connected 'tothe burner. f Y IFig.. 2 is .a longitudinal .sectionthrofugh the lcasing for .the valve operating. rnech'aisrn .showing thelatter, the valve andthe thermostat elements the `valve element being seated.

YFig.` 3 is. 'a fragmentary 'viefvv :of the.V partsV but; vshowingthe'valve elei is to construct lirnostat elements surrounded bythe medium Fig. Lis-a fragmentary elevation of I casing. y Figv isa section onthe line of Fig', 2.

In the drawing, l', 2, indicate suitable therto'be' heated,r such 'medium in theV present ap# pll'catlon ofmy invention being Water. The

tank 3', into Whichleadsasupplyfpipel connected to a suitable source of supply, the'tank i' serving as a reservoir r`orthe heated water and `hearing anoutlet `pipe leading from: its Q. lupper portion to one or more lpoints' for use.

Il lnithe formrof tank Sillustratedyits Aside 'Wall 3L ise'xt'ended dowvnvvardlyjoform'a skirt below thebotto'rn 3b 'of the tank, the

Skirt. farming a are box @and thegboeomfsb l T70 having a ring thereinFforining'a mountingis 'formed (cDCentra'lly with an opening?? for thenec'kportion of a spreaderl. and b) Sand its top Wall to carry off Vthe products of combustion; 10 indicates a suitable drai n .jtherrnostat elements 15 2i are, for illustrative Y. l

purposes,f sliovvnprojecting rinto a'suitable'fgo "open yend'fof a flue v9 leading through thetank Y'. 75

pipe preferably, leading fronithe lower porltion'ofth'elspreader 85 its outer portioncarrys" 7 `iin g.ava1ve'10.l VThe spreader isprovided- `8` Q vvaten into ariser tube Slfleading tothe'up-f Y perg'portion o'ftheitankl llindicates'asuit- With c leilecting.;r Wall 8*1- which directs the able burner; prefefabiyadapted fof n'lifting`k plied apipe`12.

naturalor 'artificial gas', the'=gas lbeingjsup'- .13 indicates acasing enclosing aA valvefl: and kan',opi-rating.niechanisrn, indicated asian ventirety at 15; thel casingisinterposedin the rpipe '12, so thatgthe combustible .3 inediunn-i ovvsthrough the casing, suoli flow being con- 9o Y` l trolledfbyf the valvel. The casing v13 .Coin-1 prises niainfineniber' V13? and a removable Y The ineinberflf is, shapednto torna chainben 13? for the valve Velement lar and'A Vtamaos@to*which,referencewill meenemen' i i n zharnberl 13b Y. for; theroperating'. inechanisni f,

15, these, chambers. being, vseparated by fan. A' internalv flange Onriln 1 3@ the openin'gthrough .Whichforrnsthejvalve' openingand" the cir-Q cuniierential Vedge thereof-preferably "the l pendnscellar te vhh the nine Section 12a upper edge-being shaped form a true circle to constitute the valve seat for the valveV element 14a. The valve element preferably comprises a relatively heavy ball (for example, a steel ball) and is impelled lcoward its seat by gravity and the pressure of the gas suppliedby the pipe 12. The annular rim 13c serves to collect foreign matter and heavier ingredients in the gas. The side wall of the chamber 13El is preferably of annular shape and isv restricted in its V diameter so that the ball cannot become so dislocated from its seat that it will not gravitate onto its seat when the casingis positioned as shown in the drawings and the parts of the operating mechanism 15 are in normal positien. At one side A'the side wallof the chamber 13a is formed with a collar. which forms a suitable connection for the end` of the supply pipe V12; and its top wall ,is formed with an opening 16, whichv is closed by a removable plug 17. The side walls of the chamber lb'are vertical and have planular inner surfacesv and their inner faces are spaced apart a distance substantially equal to the external diameter Yof the supply pipe section 12EL leading from the casing 13XV to 'the burner 11; accordingly, the casing is not only of minimum width to reduce its size and amount of metal required for its walls, but such construction eliminates unnecessary interiorjledges or other portions thatwould' aect the free flow of the gas or form collecting walls for ingredients and foreign matter contained in it. `The lower portion of the casing is shaped to form a deis suitably connected, At one end the casing 13 is provided with a hollow boss 18 eX- V' teriorlythreaded toA removably fit a suitable 'ring mounted the wall of, the tank 3. rlhe thermo-element 1 (which preferably consists of copper. or othernietal having a relatively Acoeiiicientof expansion) comprises a tube mounted at its outer end 1n a liquid tight manner in the boss 18,7whereas the thermo 1 @lement 2' (which Preferably Consists of in,-

vvar metal or qther material having amrelafiibf., W @efficient 0f expansie@ com# Vprises al rod and extends through the tube 5.o

1, its outer end operatively Ven,gaging the operating mechanism 15 in themanner to be later set forth. The inner end of the tube liissealedv by a hollow plug 19. The inner f wall of the plug' is threaded'and the inner end ofthe rod 2 is threaded therein, such jconnection serving to adjustably connect the ner. e, kerf (not shown). ,so Y

' wall of the casing opposite to the boss 18..

element-s together, for which4 purpose the indiof the rod` 2 may beV formed. With a 2On indicates an opening formed in that end Theopening closediby theremovable A leasing member (already referred to)` which comprisesga cap or hood' 21, arranged to co- .;perate with the walls of the casing member 13K to support the operating mechanism 15. The cap 21 is provided with a iange 21a which is removably secured to the end wall of the casing 13X in a liquid tight manner, for which purpose a gasket (not shown) may be used. rllhe cap 21 may be formed from sheet metal.

The operating mechanism 15 comprises a main lever 23 pivoted at its upper portion on a transverse shaft or pin 211, which is mounted at its opposite ends in the side Walls of the casing, a second lever 25 pivotally connected at its upper end to the lower portion of the main lever 23, by a pivot 23a and operatively connected at its lower end to the casing 13v (preferably an adjustable abutment 26) a third or intermediate lever 27 pivoted on aV transverse shaft 28 mounted at its opposite ends in the side walls of the cap 21 and pivotally connected tothe main lever element 14a to control its unseating and seatingt The abutment 26 preferably consists of a rod threaded at its outer portion in an opening 262L formed in the front end wall of the casing 13X and extends through the opening, whereby its outer end maybe engagedy by a suitable tool.` The main lever 23 is stamped or otherwise formed from a vsheet metal blank having portions 23% folded on afmedian line into face to face relation and legs 23h which have off-sets 23e. to dispose their outer portions in parallel relation upon opposite sides of the intermediate lever 27.V This form of construction has several advantages, which permit the lever to be made from relatively thin. sheet metal without sacrificing. its strength; namely the fold along the bottom reinforces the folded portionsV longitudinally, it provides two thicknesses of metal substantially in line with the direction of thrust incident to the movement of the thermo-rod 2 and it transmits kthis-thrust to the opposite sides of the pivot 28@7 which in turn swings the intermediate lever 27 without tendency 'to distort the shaft or--pin 28 for the latter. By insuring' a free swinging of the'lever 27, the Vcombined thrust and snap acting means 29 actuate and control the valve' 14 ina posi- Vto form relatively wide thrust walls 25a, 25a

forthe Vrods 2 and 2G, respectively, which walls are reinforced along their vertical sides by flanges 25", the upper ends of which serve as bifurcations to straddle the lever 23 and the lower ends of which straddle the free end ofthe adjusting rod 26 so that the latter maintains 'the levers iny position and against dislocation once the parts are as- 'transverse lines, such curvature serving: to -prevent the rod2 yfrom dropping l'downj and n' ,Y engaging the inner wall of the tube Vl.v n

= The rod -2 maybe'a'rrangedto engage either *Y insegno c semblediiAs shwn, the wall'25ais curved on lever 23 or 25'-, sincetheyare pivoted together fat a point intermediate 'their operative con y nectionsv with the'casingl7- butin thep'referred Y construction, thej-rod'l 2 engages the lever 25, as above set'forth." i e i 'ff' "lhelpivot or supporting shaft 2l1nay2com-.f prise two `parts 243524210'facilitate 4thev mounting kofthe1leverl23"in the vcasing 13'.'r Eachpart hasv athreaded portion removably` "litting a threaded'opevning in ene V'side wall of the casing.k Thepart '24h is -t'orrned'with an axial opening 24a leading` inwardly from its'finner end and the part 24hEL is reduced at its inner end,` such reduced portion extending through aligned openings formed inthefol'd- Yed-portions/ 23a of the lever 2 3 andinto'the opening 24a -(see Figr) glthe inner end off the 'part 2&1 engagingone side face ofthe lever:23 andtheshoulderformed bythe r'e-v duced portion'ot'the vpart 242l engaging,` the other side face ofthe lever to position itcenf.-

VVtr'ally of the casing. o

member -pivotallyconnected at its` lower end tothe inner end'Y of the lever 27 so as to be actuated 'thereby to lift kor unseat the valve elementA A14:@ or ypermit the seating thereof Awhen the 'lever27 -is operated inra manner to be later described-i rlhe tree endet the lever 2'( is. preferably biturcatech fasshown in Fig. .6 and the lower end of the plunger()v isfreduced to fit between these bifurcations. Thev plunger or' thrustlnember 301 extends up- Y -peratureof thewaterinthetank 3,will swing Y lthe adjacentr ends of the levers 23 and 2T upc lwardly and the latter will m-ovelthe plunger Y A element .2 moves toward the left, dueto rise *in temperature of the water lin the VVtank-3 ttheseparts will grnove .inY theA yopposite direction. 31' indicates a spring carried by the upperlendA of fthep'lunger l30 `and interposed r between thefp'lunger andvalve element 142' v'being.,connected to 'andsupperted Vby the" plunger 80 so as toirnve upwardly anddow-n-fp. fw'ardlytherewith; :The .Spling 31 flprefer-Y ably consists of a"coiledfseetion'fofwir@ the.' coil beingV yof "conical shape' to'f formi lat "its, *upper end'ia pocket,V which' supports' thevalve f' u y'element 14? whenfitllis jun'se'ated"fllheupper lend of'thejspringlislof a size-te fitwithin the valve f seat and to 'engage the' valve fele' .war-olly andiis arranged to'lneve inan endwise direction substantially axially ef thervalve seat asit operates upwardly and* downwardtowardl theright due to fall ordropin ternsubstznxntially, .en'dw'isel upwardly; whenffthe The sprino' 3l is preferably"l connected tdif For. this purpose, they upper end of the lthrust Y l `rneinber is formed withav screw :threaded Ofjthe combined Vthrust and` snap y'actionV Nmeans 29, 80 indicates [a plunger or thrust the scr'ewis Vprovided withacollar.gfwhich vCop-op',er-ates with .a washerfc held on the up fment atl pointsrsubstantially concentric fito l' the axis of thev -valveseati y The valve elementjlllELK is held te itsseat by v l its weight andalso .by thepressure ofthe fuel 70 liowing inthe pip'efl2. FAS vthelthrust rnern-.Vl Vber *30 moves upwardly,,itircompresses the- /springl against th'ejoolnbined re'snstanceof. y

the weightot the valveelern'ent Aand pressure `supply out' the Y fuel to pass .l the valve .to the A burner. Thisjoperationwill insure proper; j

and immediate ignitiony of the burner freine-807' `its pilotA lll Vand, alsofprevent waste.ot-fuel.

ln themovement of theplunger or thrust member'SOV downwardly',h the tension'lof'the spring 31 willholdor support the valvejelenient until its weightsupplementedV by the seat withas napactivonA 3 the thrust member SDin a1 detachable manner openingto receive a screw 32;v rIzhe headgo'f.-

per end of the thrust mernberO-by'the of the 'screw tordeta'chably engage the lower* end convolutionfothe s'sprng.P31"andd-husy j Y 'i AVsecureit in position. `The'head of the screw. Y

y' *The abutment26'isfadjustabletoiditerentv i i positions so that the temperature of thewaterr,

ijn the tank l canV bekeptatany desiredtemf '05 A perature within certain flimits.' Y "In otherl wordsy bymoving the inner end of thea'but-j' y" 'f Y i L' or L "I'nent26 toward` orvfrom the lever 25, the-lat-.-

- With the partsconstructed and arranged as '.fclescribed; operatibn of fthe lelement 2 ter lbecaused to engage the abutinentvat Y any desired .time in the movement ofthe lcv-L ers 235 25,1and thus regulate'tlie'epeningand closing Vofthe valve 14. c It willbenoted that 'in' `my construction'l 5between the vlevers y'123 and r25' 'arediSpos'ed-f disposedout o thel path yof'flirvivrof theffuel tagesiineident to this form" oi .o ff' y gas pressure overcomes the spring tension, -p whereupon the valvefeleinentwlll engagelts be relatively small,V the pivots for' the levers 23, 27, are Widely separated so that their swingingv portions mayy be ,made relatively longtoV insure the desired leverage; the levers 'are' not intended to be in any sense limiting 23 and 27 are so related that the pivot connection between them can be readily changed y.Without aecting their lengths or any of the other parts of the mechanism; and greater Yaccess to the levers results.

Toy those skilled in the art to Which my inventi'on relates many changes in construction land Widely differing embodiments and applicationsof the invention will suggest themselves Without departing fromthe spirit and scope thereof; The descriptions and disclosuresV herein are purely illustrative and for; actuating the-,valve element of' said Vvalve-a second' lever operatively connected to theother lever and said casing, and means Veii'gaging said second lever and operating through it and said pair of levers to operate Y said valve element actuating means.

. 2.' In mechanism of the class described, the

. combination With a casing having inlet and outlet connections for fuel and a valve in said casing, of a pair of levers pivotally connectedtogether at their inner Vportions and pivotally mountedat their outer ends in said casing, the pivot mountings being disposed out of the path of flow of thefuel through said casing, means carried by one of said vlevers for actuating the Vvalve element of -said valve, a second lever operatively connected to the otherlever and said casing, andmeans engaging said second lever and operating through it and said pair of levers to operate said valve element actuating means. o Y

8;, In mechanism of the class descri ed,

:the combination of a casing having inlet and outlet connections for fuel and VVshaped to form chambers at opposite sides of the path i of. flowi of the fuel through the casing, a

tions, theouter portions of said levers eX` valve in said casing,a pair of levers pivotally connected together at vtheir inner portending in opposite directions intot-he outer portions of said chambers, pivots for the outer ends of. said levers supported by the.

Walls of said chamber-@whereby said pivots are disposed outof1 the path of flow of the fuel through said casing,

l element of saidvvalve, la *second` leveroopermeans carried byV n oneofsaid leversafor actuating the valveV casing, and meansV engaging saidl second lever and operating through it and. said pair .of levers to operate said valve element actuating means.

4. ln mechanism of the class described,` the combination of a casing having inlet and outlet connections for fuel and comprising a main member and a Vremovable member, a valve in said casing, a pair of levers pivotally connected together at theirl inner portions and pivotally mounted at their outer endsl in said main member and said removable member, respectively, means carried by one of said.` levers for actuating the valve element of said valve, Va second lever operatively @connected to the other lever and said casing, and means engaging said secondlever and operating through it and said pair of levers to operate said valve f element actuating means. y

5. In mechanism of the class described, the combination of a casing having; inlet outlet, connections for fuel and comprisa main member and a removable member, a valve in said casing, a pair of levers pivotallyV connected together at their inner portions and pivotally mountedet. their outer ends in `said main member and sai-d removable member, respectively, the pivot mount- Vings for the outer ends of said levers being disposed out of the path of flow of the fuel, means carried by one of. said levers for actuating the valve element of said valve, a. second lever operativelyv connected to the other lever and said casing, and means engaging said second lever and operating through it and said pair of levers to operate said valve element actuating means.

6.v In mechanism of the class described, he combination of a casing comprising a main member and a removable member, an inlet'and an outlet for fuel at one end of said Vmain member, a valve in said casing between the inlet and outlet, the end Wallof said casing adjacent said valve being formed with an opening Which is closed by said removable membeiga pair of levers having portionsextending through said opening, pivotal connections between said levers, the outer end of one lever being mounted on a pivot supported in said main casing member adjacent the end thereof remote from said opening and the outer end ofthe other lever being mounted on a pivot supported in'said removable casing member, means carried by the last mentioned lever for actuating the valve element 4of said valve, and means for swinging the rst mentionedlever. .o i

7; ln mechanism ofthe clas'srdescribed, the

combination of acasing comprising a main Vmember 'and Va removable member, an inlet and an vout-let for fuelat one end o'f'said main member, a valve in said vcasing between ythe inlet and outlet, the side VWalls of the casing betvveen said valve and said foutletvbengt paralleland their inner surfaces being planu-l larg'the end wall of saidcasing adjacent said valvelbeing formed' with .ian` opening f which l isclosed .bysaid removable member, a pair` ofjlevers having portions extending through'V *meanscarried bythe last mentioned'lever for actuatingthevalve element vof said valve`,and means forlswinging theirst mentioned lever. 8.' In mechanism of theclassfdescribed, the

combination'w'ith a casing having inlet and c th'eirouter ends in saidfcasingaiidpivotally outlet connections for fuel and a valve in saidcasing, of apair of leverslnorinally disposed inthe same plane` and pivotally mounted at connected together at their inner'V portions, meanscarried by one ofsaid levers for actu` ating the valve' elementof said valve,'asecond lever operatively connected to the other lever,

an 'abutment carriedby said casingarranged to be engaged by said second lever, nieans carried bysaid secondflever vand engaging said c abutment to preventlatera'l swinging of, said second lever and the .lever to which it is conl nected, and means engaging said'second lever y and operating through itV and said pair of leversto operate said valve 4element actuating means.v Y v 9. InLmechanismoftheclass described, the

' combination of. a 'casing havingan inlet and an outlet for fuel and a valve in' said casing,

and an operating mechanism for said'f'valve, j said mechanism comp'risinga main lever pivn otally mounted in saidv casing and having a:V

body portion at one end and spaced legs extending therefrom, a second lever pivotally connected to said body portion and operative-r ly connected to saidV casing, an intermediate lever pivotally mounted atits outer end inA said casing, theinner portion of said'intermediate lever being disposed-between said legs, pivot connections between said legs` and the inner portion of said intermediate. lever, means carried by said intermediate lever for actuating the valve element ofy Lsaid valve and means arranged to engage said second lever and through it and said main and ,vin-k termediate levers to operate said valve element actuating means.

10. In mechanism of thev class described,

the combination of a casing'having an inletv and an outlet for fuel and a valve in said casing, and an operating mechanism .Y forV said valve, ksaid mechanism comprising a main Y, lever pivotally ,mounted in said casing and c having a body portion at oneend and spaced legs extending therefrom, a second leverpiv-' `otally connectedtoV said bodj)7 portion and operatively connected to said casing, an` intermediate` lever pivotally`mountedy at its outer end in said casing, the inner portion'of saidY lintermediate ilever being disposed be` Y tween said legs, pivot connections-between said legs and theinnerportion' of said intermediatelever, means carriediby therfreegend Y valve element ofv said iy valve and meansrarof. saidv intermediate lever'for actuatingfthe 1 rangedA to engage-,said second'lever and,

through itand saidpmain and intermediatey levers tov operate salidrvalve element actuating.

Y11. ln mechanism ofthe class described," f l the combination with a casing, a `valve therein and thermostat elements associated with saidk 1 casing,V the movable one. thereof extending into said` casing, of a set ofjmultiplying levers between the movable .thermostat element and the valve element of said valve, saidset of 'levers comprising a pair of levers pivotally f mounted at their outer ends in said casing andi,V v pivotally connected together at their inner v p portions and a leverarranged to be engaged' bythe movable thermostat element and operatively connected' to one of''said. first-men tione'dlevers, vanda devicecarried by the other lever of` said rst-ineiitioned levers for1 operating thevalve element-ef said valve. Y 12.In mechanismy ofthe class described, j

the combination witha casing',fa valve there'- in and thermostat elements associated with said casing, the movable one thereofl extending into said casing, of aV4 setof multiplying; l

' levers between-the ymovable thermostat :element andthe valve 'element of said valve, and an abutment insaid casing, said levers com;

prising a main lever pivotally lmounted insaid casing, a second lever pivotally connected' tol said inain lever and engaging said abut-' ment,an intermediate lever pivotally mountW said main leverV and means carried by the in-V iin Y.

' ed in saidcasing and pivotally connectedto. l A

termediate leverv for actuating vthe valve ele-V "l ment'ofsaidvalvesaid second lever having thrust-walls oneto be engaged bythe movable saidabutment.V .K t

'13. In'mechani'sm ofjthe classdescribed,

the combination wit-ha casing, avalve therey in and thermostat elements associated with: said casing, the ymovable 'one thereof extendmentarid the 'valves element of said valve, and an abutment in saidV casing, vsaid levers Vcomprising a main lever pivotally mounted in said casing, a second' lever pivotally con! nected to said mainv leverV and engaging -said abutment, any intermediate lever :pivotally mounted'in said casing and vpivotally .conc nected to `said main lever 'and means carriedA f vby the intermediate lever foilcact-uating the thermostat element and theother to'engage ing linto said casing, of asetfof multiplying levers betweenv the movable y thermostat .ele-

valve element of said valve, said second lever t" having thrust'wallsone to be engaged bythen movable thermostat element .and the other to aiV engage said. abutment, `the thrust wall.engaged by said theromstat element being shapedgto: support the Vengaging end thereof.

14..; In mechanism of the class described,

i bhe combination with a. casing, a valve therein and thermostaty elements associated with said casing, the movable one thereof eXtending into said casing, of a set of multiplying levers between the movable thermostat element and the valve element of said valve, and an abutment in said casing, said levers comprising a main lever pivotally mounted in said Casing, -a second lever pivotally con- Vas posed at the opposite sides of said abutment whereby the Vlatter maintains said levers in operative relation.

l5. In mechanism of the class described, the combination with a casing having an inlet andan outlet for fuel, a valve in said casing, and thermostat elements associated with said casing, one thereof being movable and extendinginto said casing, of levers operatively engaging said casing at points at opposite sides of saidvmovable thermostat element and pivotally connected together, a portion of one of said levers being disposed in line with the movable thermostat element, whereby the movement of said element will operate said levers one of said levers having a long arm terminating in spaced legs, la separate lever pivotally mounted at its outer end in said casing and having its inner portion disposed between said legs, pivot connections between said legs and the inner portion of said separate lever, and means carried by the inner' end of said separate lever for actuating the valve element of said valve.

16.V In mechanism of the classl described, the combination with a casing having an 1nlet andi an outlet for fuel, a valve in said casing 'and thermostat elements associated with said casing, one thereof being movable and extending into said casing, of levers oper-Y atively engaging said casing at points at op-y posite sides of Vsaid movable thermostat element and pivotally connected together, a portion of one of said levers being. disposed in lline with the movable thermostat element,

whereby the movement of said element will operate said levers, one of said levers having a longv arm terminating in spaced legs, a separate lever pivotally mounted at its outer end in said casing and having its inner por- Ytion disposedbetween said legs, pivot connections between said legs and the inner por-` tionrof said separate' lever, and meanscarried by the inner end of said separateflever for actuating the valve element of said valve, said means comprising a plunger and a compression spring co-acting with the valve elementV Y ment and pivotally connected together, a portion of one of said leversbeing disposed in line with the movable thermostat element, whereby the movement of said element will operate said levers, one of saidlevers having a long arm terminating in spaced legs, a separate one thereof being Vmovable, and

lever pivotally mounted alt-,its outer end in said casing and having its inner portion disposed between said legs, pivotv connections between said legs and the inner portion of said separate lever, and means carried by the inner end'of said separate lever for actuating the valve element of said valve, said means comprising a plunger and a vcompression spring co-acting with the valve element due to itsjweight and pressure of fuel supplied through said inlet to unseat and seat said valve with a snap action, and said valve element acting through said spring to maintain the latter and said plunger in position to move upwardly and downwardly as said separate lever is operated.

In testimony whereof, I have hereunto subscribed my name.

HOWARD E. GINTHER.

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