US1269689A - Carbureter. - Google Patents

Description

G. W. DONNING.

CARBURETERl APPLICATION FILED AuG,26.1915.

Patented June 18, 1918.

2 SHEETS-SHEET l.

e0/:ge W. Ummng G. W. DONNING.

CARBURETER.

APPLICATION FILED Aue.2l6. 1915.

Patented June' 18, 1918.

2 S H EETS- SHEET 2.

l l 2 a III Iwllfoz. George M4 00u/7i@ UNin "s GEORGE W. DONNING, 0F STANFORD, CONNECTICUT, ASSIGNOR TO DONNING CARBU- RETER CORPORATION, OF ESOPUS, NEW YORK, A CORPORATION OF NEW YORK.

CARBURETER.

Specification of Letters Patent.

Patented J une 18, i9i8.

Application led August 26, 1915. Serial No. 47,531.

broadest aspects, is to utilize air for heating the walls of a carbureter-and, in certain instances, the motor inlet-manifold-tempered to substantially the same degree asthe air which is used for making the gaseous mixture in the carbureter, there being novel means (such as an electric device) provided for controlling the temperature of the air automatically, the electric device being thermostatically controlled.

Still another object is to effect the automatic preheating operation in the event that the temperature of the air or of the gaseous mixture should, at any time, porarily, below a predetermined point.

Still anotherobject within the contemplation of the invention is to provide a ther mostatic device, preferably arranged in the path or effective zone of the heating fluid, and which will not only control the temperature of the air, but also render the air-preheater active or inactive and, moreover, effectan operation of valves which control various air ports; such device being adjustable so that different temperatures may be selected to accord with different grades of fuel that may be used, with consequent economy in the employment of the same.

A further object of the invention is to provide means for releasing, into the atmosphere, the heated air (or portions thereof) before it reaches the carbureter chamber, in accordance with the requirements of the motor. f

The invention in general seeks to provide a structure in which the various instrument-alities have a certainty of action to accomplish the required results, and which structure, from an operative standpoint, is effectual at all times and which structurally con= sidered, is simple and compact and, while fall, even tem-v funCtiOning, requires little if any regulatlng.

Other objects and advantages of the invention will be more or less apparent from the appended drawings and will be made entirely clear from the following description.

In order that the invention may be readily comprehended, drawings are hereto appended and which are illustrative of a preferred.

embodiment of the invention; it being understood, however, that the same is capable of a wide range of modification and is susceptible of utilizations different from that revealed.

In the drawings;

Figure l is a view in vertical section of a carbureter constructed in accordance with one embodiment of my invention;

Fig. laL is a similar View of a modified form of structure, the same being constructed in accordance with a somewhat different embodiment of the invention, and in which the heating-device in the air-conduit occupies adiflerent position than in Fig. 1;

Fig. 2 is avfragmentary view of a modilied form of air-intake structure;

Fig. 3 is a fragmentary view of a modified form of air and controlling device; and

Fig. 4 is a collective view in detail of parts of the air and controlling device.

.Referring to the drawings, it will be noted that the reference-character 1 designates the outline of a combustion motor, which may include one or a shown.

Connected with the motor, in any appropriate manner, as by'inlet-manifolds 2, is my improved carbureter designated, generally, by the reference-character 3. In this instance, the manifolds are surrounded by a jacket 4 which provides a channel 5 adapted to contain a heating iiuid'which, in this in.- stance, is air. The channel is supplied with heating fluid from a source and in a manner presently to beexplained.

Preferably and as shown, the carbureter includes a mixing chamber 6 and an airchamber 7.A These chambers are separated by a corrugated valve-member 8 which, being of thin resilient metal, is flexible and adapted to seat upon a circumferential ridge 9 extending inwardly from the walls of the carbureter. The plate 8 is provided with a plurality of. cylinders, not i seiies o epeitures i0, :is shown. @epenfiing from the piate is e uei-eontioiiing valve il oiining en extension of e stein i2 which carries e `ein 13 adapted to engage in e siot le oiined in e movable arm i5 piyote on a, slide member 16. l s shown, this slide mern ber extends through the wail ofthe @erbuietei, projects beyonfi the exterior sui'ieoe thereof, and eariies e, iinniied heaei 1?, By this slide, en adjustment oic the eini l5 may be effected.

The mn 15 is sustained in e noiinaily horizontal position by being ettaeired to e link 18 pivotaliy connected to a 'tiiiotte- Valve i9 which in tuin, is piyoted et 20. The valve is positionsbie 1oy any pieeiieo, ineens? and which may be those usually eniliioyed in this type of stnetuie, By adineting the Min l5 thi'ongh the siide-ineinioe i6, tne fiile-inni oiq the anni is siiiieteoi towafd the iight o1' left, Wheieby the position the nicinm of 'the iini 'i8 may be eiiengesi and, thiis, the, extent oiE movement oit the ya-iyes 8 anti ll may be yeiie.

Mounted. in and npstending fiom the ioot toin-poition 2 o'f tiie eoiiouretei is e, nei nozzie 22 pmi/ideal with :i passage 23 which the Valve ii is adeptee to be seatefi to oontoi the seine, This nozzie is enooinn wie eoii l du ti g wires 24 iittei being es enelA vizeei oy pfesentiy to 'be desea/'foei ste'tiono. ez 2 may be matie integrof Wifi 'L nozzie. 22 anais snee insite "ice, tee "nw,

e eneoznpass :ceeeive inn tiie is- -lo v ye le, as e esoy ....7 i .L C onen Jee in t en steai mit se eioozed ehemeei:

against entifenee nino t 'o by 'die Valve S, since it will oe seete on m e 1M 51.2 the neige 9 ine wine-tion oi toe noies i@ yelyeplete 8 is of since tno 't' e Sile' L,

emi portions oi? *Siae pieta from the iiig'e 9, if the aiipessnfe against the folate caused by suction be suiieient.

The eiongete formation of the veive il and of the Weils of the passage 23 permit :in exact adjustment' thereof. As shown in i? ioi instance, the passage 23 is enlarged to oini e ehambe 28. Beiow this Chamber 28 is a passage 29 in Wiiieh e eyiindi'icai "poition 3G o the Veive "il is guided. The ohenibei 28 provides foi the stofege of a, small quantity of nel which may 1beileoteii by the electric heater 25. Leading into the chamber 28 ae Channels 28a through which uei flows thereinto fiom below Threaded into the nozzle 22 is e uf-Cou @ling 8i adapted to Toe oonneoted to sources M diqerent gedes of uei,` geinlits 'the use oi gasoiene or kerosene, oi both mixed. To this end, a. Veiye 31a is iisposeol in the eoneiing, its construction being such (es shown) that tiie uei may ow 'thougii its Ysiieped eiiennei from one arm oi the Y-eouyaiing, oi oni the othei eine7 ei' iiom both.,

@peiling :to the mixing-chamber 6 is en eniiiiaiiy siii-port 32 that is eontoiie ioy et spiing-press-e yaiye 33.

Monnteei in e lippe? poition the Geiiniete and pieeiebiy in the peti?. of i'iow of the gaseous inintnie fiom the mixing- AChania-ei* 6 the manifolds 3 is e easing eonteinin@ e ioieftiie iiquiol. The eesportion 3'3"., Bece oinjie of tiie enteioi" sniiaoe 'the is a space 38 in which easing se, and neing 'Meent with the poi- -Jngeif 3% may, es

nien, v @time of e sin. nete mi,

1ie Cep l may 'oe heid iete-f d feeding @et shown @heresy to pieyent ieeiiege., L e and eXoos-eoi 'gestion ef the @hingen is? es shown.i 'video with e seiies oi@ esses of iio es -29 @Responding teniloeif'atnegieuens and i o may insetee. 1pins 4:3 .fi poni-tei1 5 on tiie eine 36 iegtefs anetiie iie ziiioieinentenioeietnie-gedu@tiene es the moves ne oi {iov-.13,

ci gaseous mixture, it passes yCont/ents Witii a een wiiiV-n "nes eA Also pivoted on the standard 47 isa lever 54 adapted to be engaged by the pin 43 in the plunger 39, and'which is held against the pin 43 by a spring 55, the tension of which may be controlled by" a vtensioningdevice 56. Pivoted to the lever 54 is an actuating rod 57 which, at its other end, is connected to a valve-member 58.

4 Formed in the carbureter and in juxtapo' sition to the mixing-chamber 6, the thermostat-casing 34 and the air-chamber 7 are channels 61, and 63 referably communicating with the channe s 5 formed in the walls of the intake-manifolds, and into these channels air from an air-conduit (presently to be described) is introduced and the temperature of which is influenced-raised, for instanccgby the tempered air passing into the chamber from said air-conduit.

To protect these channels from extreme heat or cold, I may incase the carbureterwalls, etc., with a covering 64 of asbestos or the like. To protect the asbestos from injury, a metallic casing 654 (Fig. l) may be utilized.

The lower, angular portion 66 of the carbureter, forming a part of the air-chamber 7, is provided with a' plurality of air- ports 67, 68 and 69, which are controlled, respectively, by the valve-member 58, formed of a plurality of cover-elements 71 and 72 and controlled by the actuating rod 57. The air-port 68, as shown, is formed by an air intake extension of the portion 66 and is adapted to introduce into the carbureter air drawn fromthe atmosphere.

Connected with the air-port 69 'is an airconduit (Fig. 1) which may be protected, as by a metallic and asbestos casing 74 as shown, Afragmentary, at the right-hand end of the conduit.

The lower portion of the carbureter is provided with an opening 7 A5 to receive heated air which is'adapted to circulate into the channels aforementioned.

Suspended in the air-conduit is aheatingcoil 76 and to thisA are connected, as by wires 77 and 78, the terminals 79 and 80. Connecting the terminals 79 with the switchdevice 51 is a conducting wire 81. Connecting the terminal 80 and the battery 5 3 is a.

conducting wire 83. Between the switchdevice 51 and the terminal 49, on the confunctions.

yheating coil will become .For instance,

ducting wire 50, is a signal light 84. The aforementioned conducting wire` 26 is connected with the wire 81, while the wire 27 is connected with the wire 83. Between the ends of the heating-coil 76 is inte osed a terminal 82. When the wire 81a is etached from the terminal 79 and attached to the terminal 82, only a portion of the coil will be energized when the current is on, thus enabling one to vary the heating capacity of the.airconduit. l

Mounted at the end of the air-conduit 73, and extendin in alinement with or below the plane of ghe air-chamber 7, is an airheater 85 provided with an air-inlet 86 and encompasslng a portion of the exhaustmanifold 87, whereby the'contained air may be heated.

Operation: Assuming that the switch-de vice 5l is on and that the carbureter is cold, the plunger 39 of the thermostatic` device will be in itslowermost position; hence the arm 48 will be in contact with the terminal 49, completing the circuit through the wires and 52, the battery, heating coil, etc., whereupon said heating coil will be energized and generate heat in the air-conduit. Incidentally, also, the signal light will be lighted and this will indicate to the driver that the parts are performing their proper air-conduit and the channels communicating therewith, the mixing-chamber, etc., and the mixture have become suiiiciently heated, the plunger 39 will be raised by the expansion of the volatile fluid 35. This will permit the arm 48 to be rocked out of contact with the terminal 49 by its spring, breaking the circuit, whereupon the signal or light and the inactive. At the same time, the lever 54 will be raised by the plunger and this will cause the actuating rod 57 to operate the valve deviceto open both orts 67 and 68, thereby partially or comp etely checking the iow of air passing through the conduit 69. While the lever 54 may at times be operated manually, it gen-v erally is under the control4 of the thermostat plunger. The time and extent of operation, with relation to the temperature of the contents of the carbureter, may be predeter- The moment that the air,- in the mined by the driver according to which of the holes 42 contains vthe pins 43 and 44.V if thepin 43 is inserted in that hole 42 which is below the one in which it is now shown, obviously, the plunger 39 will have a longer movement before it positions the pin against the lever 54; hence, the rod 57 and the valve 58 will not be operated as quickly, wherefore, the temperature of the air passing through the airconduit will increase and influence the contents of the casing 34 and cause the plunger 39 to have the longer movement just referred to. When these are once adjustedl by the driver for any o' e 'piiiieiity oi iueis, they mey ipe?-s meneiitiy te eiit ajiisteei se tiiet, Wiiitei oi' summe?, oi during sudden changes oi the atmosphere, thei'e is no need. foi eti-justiiieiits to meet such etmospiieiio changes.

iii e @pending eppiieetion, Serial No. 863,369, @ed Sept, 2%, i934, toy me and others, valve mechanism is .shown peitiy or eompieteiy cutting o tile het of eoiti eil1 iiom either ef two poets. "in the pient struetiiie, emi' es iiiustiste it. liig', l, thiee ports sie disclosed. The advantage oiE the this@ port is that when it is opened, some of the eil heeteci in the eii= eoiduit Wiii escape thiough the port 37 into the atmospiiei'e. Moieovei, the ieoming eii tends to Gooi the iieeted siiu iii the conduit. The eooie, out sifle air would, in the streets-1e ef said eopendiiig application, tenti te eeoi the ee.- iouietei, itself; or, iii one oi the posts is pertiy open, oi the metei oi the eebuietei 'becomes too iiot, eii of 'toe High tempeiefture :may be edmittefi te the mixing-ehembei 'with e consequent overheating oi tile mixtute.

ii Fig. 2, have shows e somewhat medi fied tomi oi ooiistiuetion: in this insteiiee,

the veiveeotuetiiig ioci 57 is pivote@ e two-membeied Weise-devise 88, one 'pei-t si which eoiitiois the pet-L89 While the etiiei eoiitiois the poet 1%. TMViieii the @relive-de- -fit-e is iii the position it assumes, Wiles tiited, the poise S9 eed 19@ "Wii ioe oigeiieci, Whiie passage ei ei? vtiiiioug1 o the een-duit et the iight heeft?. side ei tile Weise devise 88 wiii thereby te est of? to eif to fiow into the eendiiit thiougie the 80.,

Ee Figsa 3 emi li, tieve shown e mediiied -eiiii of sii emi iiei-eoiitieiiiiig device disooseei between the miiiin-efiemiiei ti the eis-elsemosi 7. 'This iiieiiides e 9i adapted to 1oe seated upon e eiiietiiA eieiitiei rif ge oi seat The disk 9i is eoeiieeteii to tot Toes e, movement iiiepeiitieiit e 'piste 93 is meiieteiiied iii yieitles ieietioii thefete by e, these-sinned ieemeei* 9e @i resilient meteiiei which is, itseii, eeffiied by] e Vaise-stem 95 seg, este? iay en eim 96 which is oi eoiistiiietioii ties the opetetioii eseii'be with Teieeiiee to the ione of device shown ie L Tiri-e disk 9i is provided with disk 9i is formed Wi Gentse-i op 98 eiietis iiormeiiy heim i iiigiy iii seat by iesiiieiit aries o tiiet ev passage is iet es meieteiiiing e speeed fein iiiom membei Se, ieweied, the disk 9i es@ pemitted to come into enge-gerne however, the aim 96' is ieiseti,

may have e slight moi/ement este); from the disk 9i., Then, consi eieeie see tion ei the meter Wiii ieise dis 9i iet-o el gegemeiit with 'the meilioei 9%,

gs oi posts ,07, The' igeeeee 'Here-in, it iegeifti the eieetiie eis-heater, oiq the eieetiie fuel-heater, oiq beth, es fprimeiy oi init-iai heaters, While 'the exhaustoperative due to the operation oi" the tilesmostetio device which, becoming eooi, Wiil ectuste the poits end will ooiitroi the fictivity .of the heating coil in the air-conduit.

By this invention, the eoit has been mede to deveep a eerbuietei which emtodies, es permanent parte, certain 'heating end cooling instrumenteiities heietoi-oi'e regereisd. es seesonei attachments; and., thereby, e, ceroureter is produces? which is not Variatie, due te the Vsriabiiity ei atmospiieiie end. otiie conditions.

My sti'uotui aie Deeuiieiiy etiepted to sefiuce, to e minimum, the possibility of iiies. the event that the essieuKeteiq shouid be iired, it is only necessary to reieese the throttie-eeiitioi and permit the iiiei-ve-ive (enti the pests eemtioiled` thereby) te engage its seat emi theieby eut 0E the How ei :tuei into the eeiiiuietei, Wioeieuioee the fiume would Tte seii'ed out.

Fieie the ieregoieg, it wiii be seen that ii iieve devised e oariousetei which is Weii etielitee to eeiiieve the objeets emi ens in View, The stiiiotuie is exoeediiigiy simple ments oi the iiii'eiitien een be mede Without tem the spiit tiieieei, is intended that eli mettei eoiiteiieci iii the foregoing deseii15ieii emi shoe-Iii L the eeoomfoeiiyieg dewiiigs shell be iiitepiete. es iiiiistietive es' "t met iii e iimiting seese ez;- eept es Emi-tations eije expieesseti il'i the oieims wiet eis-Jim is:

i, fi eeiioiiietei including piovioieti with en eieiiiiet enti e miXtue-outiet, mee-ns independent-oi the oeibiiietef-ehem bei ioi1 beating sii peing into eeibu feter, ene-i e jacket suiiiouiiding the eiiemsei to leiovicie e eiieiiiei 'between the ehe-miler the gasket eeo. dosed. the ehemioeiu housing; e ioofiy oi sie iii-eiepeiifieet of the eii1 iiitioiieeei into the ehembei' emi 'ineens Within. the eiismioei" ieiieiice-:l

its contents oi eeifitioiiiiig the tempeietiiie n 1 e eilq enteiiig the oLeiiiie' 'Wiieieby eating of the ehembei bythe ieete; sie ie e eiiemiei ,is pi'efveiiteci.

fi eeibui'eteif ineiudieg e et Witi ee. air-miei: enti e means independent of the carbureter-chamber for heating air passing into the carbureter, a jacket surrounding the chamber to provide a channel between the chamber and the jacket and closed against the chamber for housing a body of air independent of the air introduced into the chamber, means within the chamber and influenced by its contents for controlling the temperature of the air entering the channel whereby overheating of the chamber by the heated air in the channel is prevented, and an intakemanifold provided with channeled walls, the channel thereof communicating with the channel surrounding the carbureter-chamber.

3. A carbureter including a chamber pro- .vided with an air-inlet and a mixture-outlet, and means independent of the carbureterchamber for heating air passing into the carbureter, a jacket surrounding the chamber to provide a channel between the chamber and the jacket for containing a bodyof air-independent of the air introduced into the chamber, a temperature controlling means within the chamber and influenced by the contents thereof to govern the temperature oi' the air passin into the carbureter, and an intake-mani old provided with a channel in its walls which communicates with the channel surrounding the carbureterchamber.

4. A carbureter including a plurality of chambers, an air-jacket surrounding one of the chambers, valve-mechanism for controlling the iiow of air between the chambers, an air-conduit communicating with one of the chambers and with the jacket, and a plurality of independently operable heating means within the air-conduit for heating air at different points therein and for iniiuencing the temperature of the air in the jacket.

5. A carbureter including a mixingchamber and an air-chamber, valve-mechanism between the chambers for controlling the How of air from the latter to the former, an air-jacket disposed about the mixingchamber, an airconduit communicating with the air-chamber and with the jacket, heating means within the air-conduit, and a second heating means adjacent one end of the conduit for heating air preliminary to its passing into the air-chamber; said valvemechanism operating, when in its closed position, to hold a portion of the air temporarily in the air-chamber; said heating means being eiiective to heat the air before it passes into the air-chamber, and, also, acting to influence the temperature of the air in the air-jacket.A

6. A carbureter including a mixing-chamlber and an air-chamber, valve mechanism between the chambers for controlling the flow of air from the latter to the former, an airjacket disposed about the mixing-chamber, an air-conduit communicating with the airchamber and with the jacket, heating means within the. airconduit, a second heating means adjacent one end of the conduit for heating air preliminary .to its passing into the air-chamber; said valve-mechanism operating, when in its closed position, to hold a portion of the air temporarily in the airchamber; said heating means being eective to heat the air before it passes into the airchamber and, also, actin to influence the temperature of the air in t e air-jacket; said air-conduit being -provided with atleast three ports; and valve-mechanism for controlling the passage of air through the airconduit and through two of the ports therein.

7. A carbureter including a mixing-chamber, a mixture-outlet, an air-chamber, valvemechanism between the chambers for controlling the flow of air from the latter to the former, an air-jacket disposed about the mixing-chamber, an air-heating means within the air conduit, a second heating means adjacent one end of the conduit for heating air preliminary to its passing into the air-chamber; said valve-mechanism operating, when in its closed position, to hold a portion of the air temporarily in the` airchamber; said heating means being eiective to heat the air before it passes into the airchamber and, also, actingl to iniiuence the temperature of the air in the air-jacket; said air-conduit being provided with at least three ports; valve-mechanism for controlling the passage of air through the air-conduit and through two of the ports therein, and valve-actuating mechanism acting under the influence of the temperature of the mixture which passes through the mixture-outlet for operating the valve-mechanism of the air-conduit.

8. A carbureter including a mixing-chamber, a mixture-outlet, an air-chamber, valveadjacent one end of the conduit for heating air preliminary to its passing into ,the airchamber; said valve-mechanism operating, when in its closed position, to hold a portion of the air temporarily'in the air-chamber; said heating means being effective to heat the air before'it passes into theairchamber and, also, acting to influence the temperature of the air in the air-jacket; said air-'conduit being provided with at least three ports; valve-mechanism for controlling the passage of air through the airconduit and through two of the ports therein, and valve-actuating mechanism acting under the influence of the temperature of the mixture which passes through the mixture-outlet for 'operating the valve-mechanism of the air-conduit and comprising a thermostatic device hureter,

9. l earhureter-structure inch hamher, air-conduit eomm f 'Y chemio-er and pre1-fit ed i rarity ci ports, valve-mechanism l-- ciosing elements for two oi the ports i operable to close air-conduit against the passage oit air into the chamber through a portion oi the conduit and sa 'time opening at least two oi the ports the indow o air through one 'oi the 'ports from the outside into the air-conduit chamber and for the outiiow oi1 air a portion oit the conduit through another oi the ports into the outside atmosphere and means for heating the contents o the airconduit,

l0. A carhureter-structure including a mining-chamber, an air-condunJ communicating with the chamber and'provided with a plurality of ports, valve-mechanism including closing elements Jfor two of the ports and operable to close said air-conduit against the passage or" air into the chamber through a portion. of the conduit and at the same time opening at least two of the ports for the inflow of air through one of the ports from the outside into the air-conduit and chamber and for the outflow of air from a portion of the conduit through another of the ports into the outside atmosphere, means itor operating said valve-mechanism and means for heating the contents of the airconduit.

1i. A carbureter-structure including a mixing-chamber, an air-conduit communicating with the chamber and provided with. a plurality of ports, valve-mechanism including closing elements for two oi the ports and operable for closing said air-conduit against the passage of air into the chamber through a portion of the conduit and at the same time opening at least two of the ports for the iniow of air through one of the ports from the outside into the air-conduit and chamber and for the outow of aire from a portion of the conduit through another of the ports into the outside atmosphere, means for operating said valve-mechanism including a thermostatic device adjacent to and iniuenced by the temperature of the contents of the chamber and means for heating the contents of the air-conduit.

12. A carbureter-structure including a mixing-chamber, an air-conduit communicating with the chamber and provided with a plurality of ports, valve-mechanism including closing elements for two of the ports and operable for closing said air-conduit against the passage of air into the chamber through a portion of the conduit and at thesame time opening at least two of the ports for the inflow of air through one of the ports from the outside into the aber ior the outof air iront a portion the conduit rough another o ports into the outside atmosphere, means or operating said valveniechanisin including a thermostatic device adiacent to and influenced hy the temperature ci the contents of the chamber, means for heating the air in the conduit, and means disposed between the thermostatic device the conduit whereby the former controls the temperature of the latter.

i8. i carbureter including a mixingchaniloer, an air-chamber, valve-mechanism interposed between the chambers for controlling the iiow of air from said air-chamber into said mixing-chamber, a channel formed around the chambers, an air-conduit communicating with the air-chamber, heating means within the air-conduit, said air-conduit being provided with three ports, and valve-mechanism common to two of the three ports for controlling the same and operable to close the conduit at one side of one of the ports.

lll. A carbureter including a mixingchamber, an air-chamber, valve-mechanism interposed between the chambers Jfor controlling the flow of air from said air-chamher into said mixing-chamber, a channel formed around the chambers, an air-conduit communicating with the air-chamber, heating means within the air-conduit, said airconduit being provided with three ports, valve-mechanism common to two of the three ports for controlling the same and operable to close the conduit at one side of one of the ports, and mechanism acting under the iniiuence of the temperature of the contents of the carbureter for actuating said valvemechanism.

15. A carbureter including a mixingchamber, an air-chamber, valve-mechanism interposed between the chambers for controlling the flow of air from said air-chamber into said mixing-chamber, a channel formed around the chambers, an air-conduit communicating with the air-chamber, heating means within the air-conduit, said airconduit being provided with three ports, valve-mechanism common to two of the three ports for controlling the same, and means comprising a thermostatic device housed entirely within the carbureter and acting under the influence of the temperature of its contents for actuating said valve-mechanism and operable to close the conduit at one side of one of the ports.

16. A carbureter having a chamber, a throttle-valve therein, air and fuel-controlling valves in the chamber, an air-conduit communicating with the carbureter chamber and provided with a plurality of ports, a heating device within the air-conduit for heating air passing to and beyond the controlling valve, valve-mechanism for control- 'ling the passage of air through said airconduit and through the ports and operable 'to close th'e conduit against passage of air and simultaneously to permit the iow of air through at least one of said ports, means includin a thermostatic device disposed within the carbureter chamber and iniuenced by the temperature of the contents thereinfor controlling the temperature of the contents of the' air-conduit previous to passing said controlling valves, resilient means operative on said temperature-controlling means and tending to overcome the Influencing action of the thermostatic device, and means for rendering said resilient means active.

17. A carbureter including a chamber, a throttle-valve therein, air and fuel-controlling valves in the chamber, an air-conduit communicating with the carbureter chamber, a heating device within the air-conduit for heating air passing to and beyond the controllin valve, means including a thermostatic device disposed within the carbureter chamber and influenced by the temperature of the contents therein for controlling the temperature of the contents 'of the air-conduit previous to passing said controlling valves, resilient means operative on said 'thermostatic device, sa1d reslllent means active, and a valve for` ,trolling valve and tending to temperature-controlling means and tending to overcome the influencing action of the means for rendering controlling ow of fluid into the nozzle and operatively connected to said resilient means whereby operation of the valve eliects a tensionmg of the resilient means.

18. A carbureter including a chamber, fuel-controlling means for flow of fuel thereinto, an air-inlet communieating with' the chamber and provided with a port, a valve controlling the port, a thermostatic device inuenced by the temperature of the contents of the chamber, a counteracting-device adjacent the port-coninfiuence the action of the thermostatic device, and a connection between the counteracting-device and Athe fuel-controlling means whereby operation of the counteracting device sets the fuel-controlling means.

In testimony whereof I alx my signature in presence ot two witnesses.

GEORGE W. DON N IN Gr.

' Witnesses:

FRANK R. Fowmm, BERTHA W. Auusolv.

governing the

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