US1099547A

US1099547A - Carbureter.

Info

Publication number: US1099547A
Application number: US77004913A
Authority: US
Inventors: William M Gentle
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-05-26
Filing date: 1913-05-26
Publication date: 1914-06-09
Anticipated expiration: 1931-06-09

Description

W. M. GENTLE.

GARBURETER.

APPLICATION FILED MAY 20,1913.

Patented June 9, 1914.

2 SHEEISSHEET 1.

WlTNE SSE S Patented June 9, 1914.

2 SHEETSSHEET 2.

. GENTLE CARBURETER.

APPLIGATION FILED MAY 26,1913.

III Ill/4 INVENTOR M t aw WJLTNE SSE &

I using as its main supply of fuel a liquid of" has .become heated.

outrun STATES PA ENT- OFFICE.

WILLIAM it. damn, ,OFLOS ANGELES, CALIFORNIA.

- cnzanunnrnni Specification of Letters Patent.

Patented June 9, 1914 Application filed May 26, 1913. Serial No. 770,049.

hereby declare that the following is a .full,

clear, and exact description thereof, reference being had to the accompanymg draw- The object of this inventlon 1s to. provlde a carburetor that will enable an operator to readily start an explosive engine that 1s restricted explosive quality when cold. There are several fuels-of this nature that, while cold, have a very limited explosive quality; but, when-properly treated develop a ,gas of satisfactory nature for use in the ordinary explosive engine. And this invention is intended to overcome the great difficulty that has been experiencedheretofore in converting these fuels into gases that can be used in all kinds of explosive engines, and enable the'engineto be started While .cold.

"With this carburetor attached in the com-- mon way to the engine manifold the operator' can start the engine up cold by simply cranking it, that is rotating. the crank shaft or by operating'the automatic engine starters that are now in common use with explosive engines for giving the crankshaft its initial movement. Suction through the manifold will first draw air through the priming mechanism of the carbureter wherebyit will be charged with a fuel of high explosive. quality while cold. Gas formed from this combination of elements passes on through the carbureter into the engine where it is exploded in the usual way. The engine is put into operation by the explosion and continues to run on the powier developed from the priming gasuntil t e engine gine is then utilized to convert the main sup ply of fuel into a gas of sufficient explosive quality to operate the engine. At the same time the heat from the engine is also being used to automatically cut off thesupply of priming gas, whereby the engine will continue in operation using fuel only fromthe -main supply. J

This new, novel and useful invention is a great saver of time and labor in the operation of an explosive engine; and t-henew,

novel and useful combination of parts are- The heat from the en-,.

simple in construction and contain elements of invention that are-indispensable in the operation of an explosive engine.-

'The invention will be understood from the accompanying drawings and the following description and claims.

In the drawings Figure 1 is a side ele vaton of the device as it would appear onan automobile engine, the automobile is partly broken away and it and the'engine shown by dottedline; the device and the manifold and exhaust pipe of the engine to which the carburetor is attached. being shown in full line. Fig. 2 is'an enlarged sectional plan view of the device taken on the line 2--2- of Fig. '1.' Fig. 3 is a sectional 'side'elevation of the device and its associated parts taken on the line 3-3 of Fig. 2. 'Fig. 4 is'a sectional side elevation of the device and some of the associated parts taken on the li11e.l4;

'ofiFig. 3. Fig. 5 is a section'taken on the line 5-5 of Fig. 1, the steering post being shown in full line instead of dotted line,

for the sake of-clearness. This view shows the manner of securing the sector plates to the steeringpost and their relationship to each other. Fig. 6 isa broken side' elevation of one of the sector plates and its associated'parts taken on the line 66-of Fig. 5,. Fig. 7 is an enlarged section taken on the

line

7,7 of Fig. 2, the throttle valve being shown in its closed position. Fig. 8 is a section on the line 8-8 of Fig. 7 the throttle valve being shown open. Fig. 9 is a plan view of the cylindrical heating device before it is secured to the carburetor. Fig. 10 is a section on the double line 10..l0 of Fig. 9 looking both w s;' and the course of the heatingelement through the device being shown by arrows and dotted line. The intake and the outlet of the heating element also being shown by dotted line. Fig. 11 is an enlarged side elevation of the adjustable plate for theauxiliary air valve of the de vice showing the graduated opening through it. Fig. 12 is an enlarged sectional viewv of the reciprocating valve which normally closes the air passageway through the device, showing the gauze fabric attached thereto, the fabric being broken away.

Y In detail there is shown by dotted line in I I Fig. l a part of, an "automobile 20 upon which is mounted an' engine 21. Thercis shown by full line a manifold 22 that is of the usual type and in the position it would be relative to the engine; and to it is se- .been put into operation.-

cured a carbureter 23. This carbureter 23 consists of three distinct parts each contributing to perform a common function. The part 24 is a complete carbureter within itself and is capable of operating independently of the other parts after the engine has .The part 25 is also a complete carbureter but is designed to operate onlywhile the engine is being put .into operation. These two carbureters' are joined together by a cylinder like connection 26 which contains a mechanism adapted to operate to cause the

carbureters

24 and 25 to perform a common functionin unison, and also ,to eliminate the latter and permit the former to operate independently. In the carbureter 24 there is a fuel bowl 27 which 7 is provided-with the usual fuel inlet and valve 27' and supplied with fuel from a main supply tank not shown, and said valve is controlled by a float of the usual construction. The fuel bowl 27 is provided with an upwardly extending tubular flange 28 forming anair passageway 28. A circular ellipsoidal carbureting chamber 29 is secured to and closes the upper end of the fuel chamher and has integral therewith a down-\ wardly extending tubular flange 30 which loosely surrounds the tubular flange '28 of the fuel chamber, forming thereby a fuel passageway 31 that connects the fuel chamber-with the carbureting chamber. In the passageway 31 there is movably mounted a screen fabric 32 that is secured to a valve 33. The valve 33 is slidably mounted on the rod 34 and the latter is secured to the boss 35 that extends inwardly into the air passageway 41 from the throttle casing 36. The valve 33 normally closes the air passageway 28 and is held in place by a spring 37. Suction from the engine causes this valve to move upwardly thereby lifting the fuel saturated screen 32 so that the air passing "through from the air passageway 28 to the secured the throttle lever 42 which is connected to the lever 43 on the steering post of the automobile by means of the rod 44, lever 45, link 46, bell crank 47, rod 48, lever 49, and link 50; see Figs. 1, 2 and 4. By this connection the throttle'valve 40 is operated to control the engine; and also to operate an auxiliary air valve whereby air can be admitted into the air passageway41 between the throttle valve'40 and the engine.

anism operates as a relief valve.

The object of this auxiliary air valve is to provide a means of reducing the donsumption of fuel and to also increase thepo'wer of the engine. Too much fuel and not enough air tends to decrease the efficiency of engine power. By means of this auxiliary air valve there is a great saving of gas and development of power, that makes it a necessary element and indispensable partin this carbureter construction. This auxiliary air valve consists of the following mechanism:

A p ort51 is cast into the throttle'casing 36 and is normally closed by a flat valve 52 which is loose on the shaft 39. The valve 52 has a lever like'extension 53 which is connected with a lever 54 'on the sector plate 55 which is secured to the steering post of the automobile. The connection between the levers 53 and 54 is shown in Figs. from 1 to 6, and is as follows: Tothe lever 53 is pivoted a link 56, the; other end of which is pivoted to one arm of thebel l crank 57 A rod 58 connects the other arm of the bell crank 57 with the lever 54. The lever 54 has a spring pressed latch 59 that engages-the saw toothed notches 60 in the sector plate 55 whereby the lever 54 may be moved and held in any desired position. By this means the valve 52 may be manually moved to admit air into the air passageway 41, thereby reducing the consumption of fuel and also animate the action of the engine. An automatic means is also provided for opening the port 51, which consists of the following construction: On the shaft 39 opposite the irrethrottle lever 42 there is slidably mounted a lever lug 61 which is feathered to a key way in the shaft 39. Thelug 61 is held tightly up against the valve 52 by a spring 62 which surrounds the shaft 39 and one end of which rests against the stop 63 secured to the outer end of the shaft 39. The lever like lug 61 engages a lug 64 on the valve 52 twhereby when there is a rotation of the shaft 39 by the throttle lever 42 in the direction of the arrow in Fig. 3, this rotation of the shaft will move the valve 52 and uncover the port 51. I A stop '64 limits the movement in the opposite direction. As seen by the drawings a slot 65 in the link 56 is provided to compensate for this movement. A spring 166. tends to normally hold the valve 52 closed. See Fig. 3. Another function that is accomplished by this construction and which is new, useful, necessary and indispensable in this carbureter is that this mech- By means of the construction just described the port 51 can operate as a relief valve for any internal excess pressure due to back fire or explosions caused by overheated ports. Any excess 'pressure will slide the shaft 39 against the spring 62 and thereby flat valve 52 and the lug 61 outwardly 0n the I provided for heating the fuel. 'This means consists of the following mechanism: The.

" the heated element passes downward through owing to the fact that the valve 33 closes bureter.

ing 68 whereby the size of the port opening 51 may be enlarged or reduced to conform to the quality of fuel being used. It is held in place by set screw 66; see Figs. .7 and 8.

As this tarbureter is designed to use a fuel which attains a satisfactory explosive quality only after being heated a means is engine 20 is provided with theusual exhaust pipe 71 and from this pipe near the engine is attached a pipe which is brought down to the carbureter 24 and attached to the nipple 72. A passageway 73 leads through one side of the carburet-ing chamber 29 to a heating device 74. The heating device consists of a cylindrical casing that is secured to the downwardly extending tubular flange 30 of the carbureting chamber 29. This flange 30 forms the inner wall of the heater, and the lower part is threaded to fit the threaded flange at the bottom of the heater 74;. After the heater has been screwed into place the threaded opening is soldered to prevent leakage, and a soldered ring 85 seals the upper edge} By this construction it can readily be seen that any heated fluid may be' forced through this heater to heat the fuel as it passes through the passageway 31. It can also be seen that by this construction the fuel can be heated to a very high temperature without rarefying the air and thereby decrease the expansive property of the latter- Integral with the cylindrical casing are a plurality of flange like ledges 7 5 and battle walls'76, and ports 77 which form a tortuous course for the heated element to pass through, see Figs. 7, 8, 9 and 10. As seen in these-figures the passageway 73 and enters the upper channel 78. It then travels almost half around the heater until it'comes into contact with the baflle plate 76; its course is arrested thereby and deflected through the port 77 into the next lower or second channel. It travels another half circle in the opposite direction to its first course and is again stopped by the baffle plate 76 and passed through another port 77 into another channel. down one side of. the heater until it reaches the bottom channel where a baffle plate 80 and a port 81 turn the heated element into the other side of the heateflwhere it travels an alternating course upward and out through the passageway '82, which isloeated oppositely to thepassageway 73. A

pipe 83 leads from the passageway 82 to a lower point in the exhaust p pe 71.

The carbureter 24 is connected to the car- This alternating course is continued bureter 25 by the cylinder like connection 26 by the following means: Onthe bottom 1' of the fuel bowl 27 of the carburetor 24.

there is a downwardly extending threaded flange 86 into which is screwed a flange 87. on the device 26. The device 26 also has a downwardly extending threaded flange 88 on the disk like cap 89 onto which is screwed the priming carburetor 25. This a float and fuel inlet valve 25 of usual constr'uct-ion and supplied with fuel from an an opening extending upward centrally through the carbureter 25 into which is screwed on the'flanges 91 and 92 a tubular like device 90 that contains a fuel nozzle and an air passageway. At the bottom of 93 on the upper surface of which is a V shaped ridge 94c which registers with a groove 95in the flange 91. A soft metal packing 96 is disposed between the

flanges

91 and 93 so that when the part 90 is screwed tightly into place the V shaped ridge 94 will force'the packing 96 into the groove 95 thereby preventing leakage of the fuel fromthe fuel bowl.

Cast integral with the part 90 is a fuel nozzle 97 through which there is a fuel passageway 98 that leads-from the fuel chamber 99 to the port or nozzle opening 100.

passageway 101 in the device 90. Located within the device 90 in the air passageway valve has a lurality of inverted V shaped points 103 w ich are bent inwardly toward a common center over the port 100 of the fuel nozzle 97. These points operate to conto suolc the fuel up into the air passageway where it will mix with the air. The concentrating valve 102 ismade of spring material so that the poihts 103 have a tendency to'yield to the inrush of air as the throttle valve isopened to its limit of movement; but .as the throttle valve is closed the V shaped points 103 return to a position conforming to the degree of opening'of the throttle valve. .This element of construction is necwhile the engine is being started with the throttle valve only slightly opened, otherthe air passageway 101 to draw sufficient fuel from the nozzle 100 to start the engine. On the other hand the yielding points enlarge theopening through the valve 102 through the throttle whereby too great a nozzle. A needle valve stem 104 is threaded into the base of the nozzle 97 and is carburetor is provided with a fuel chamber,v

auxiliary; supply tank not shown. There is 101 is an air concentrating valve 102. This centrate the air directly on the fuel nozzle whereby suction from the'engine will be sure.

supply of fuel will not be drawn from the the device 90 there' is a flange like extension The nozzle 97 is centrally located in the air essary to concentrate the air over the nozzle 120 y wise there'would not be suction enough in Z L I adapted to regulate the flow of fuel through the nozzle 97. It passes on through the device 26 into the carburetor 2 1. There it lifts the valve 33 thereby raising the fuel saturated screen 32 through which the explosive gas passes on into the carbureting chamber 29 and then on to the engine. After the engine has been put into operation and has developed heat either in the water jacket orrthe exhaust pipe, the latter being used in this case, the heat is used to operate a thermostat 109 which operates a mechanism to reduce the amount of priming fuel used from the earbureter 25 to prime the engine .and to eventually discontinue it altogether or until it is necessary to again use the arimin fuel to either accelerate or start the l e engine. The thermostat 109 consists of the tubular like casing 110 which forms a part of the exhaust'pipe 71. Integral with the casing'is a threaded boss 111 into which is screwed a highly expansive metal rod 112. The lower end of said rod is loose and free to move under the influeliceof expansion.

The loose end of the rod 112 rests against one end of the lever 118 which is pivoted at 114 in flanges extending from the casihg 110. The other end of the lever 113 extends out of the casing and rests against one arm of the bell crank 115 which is pivoted at 116. The other end bf the bell crank '115 is yoked and constructed in a way to operate the valve stem 117. A washer 117 is adjustably secured on the valve stem 117 in positionfor the yoke ,of the bell crank 115, to engage and thereby move the valve stem when the bell crank is operated- The valve stem 117 extends through a plosed end of the cylinder like device 26 and through the cylinder; arid secured to said valve stem is a piston like valve 118 which normally closes the open or other end of the'cylinden' This opening 119 is the main air port after the engine has been put into operation. .As shown by. dotted. line in Fig. 3 when the rod 112 of the'thermostat has expanded to the limit ofmovement the piston valve will be moved into a position to out off the air passing'through the priming carburetor 25 and will thereby fully openthe port 119 in the end of the device 26 whereby the carbureter 243will'be free to operate alone and independent of'the priming carbureter. When the engine is stopped contraction returns the thermostat to its normal position and the spring 120 on the valve stem 117 will operate to move the valve 118 back to a position opening the air passageway 101 in the priming carbureter 25 and close the port 119 of the device 26.

As seen in Fig.3, one end of the valve stem 117 is slotted at 121 through which a pin 122 is loosely mounted. Pivoted to this pin 122 is one arm of the bell crank 123, which is pivoted at 124. The other arm'of -the bell crank 123 is pivoted to one end of the connecting rod 125 the other end of which is pivoted to the lever 126 on the sector plate 127. The sector plate 127 is secured to the steering post of the automobile and is provided with a spring latch 128.

are the counterpart of the mechanism shown can readily be seen that the operator can at will move the lever 126 and through the means connecting it to the valve, stem 117 operate the valve.118 to manually reduce the consumption of priming element or to cut it 03 entirely. F or the sake of brevity no means is shown of mounting the bell cranks it being understood that a proper mounting can be'provided by any mechanic.

In operation the earbureter is attached to the engine manifold in the usual manner,

steering post of the automobile.

Assuming that the engine is idle and cold and that it is to be put into operation, and that the partsof the carbureter are in the position that are shown in Fig. 7, thethrottle lever is moved to slightly open the throttle valve 40, and then the engine is cranked in the usual manner by having the crank shaft rot-ated. 'This would-cause suction from' the engine to lift the valve 83 air passageways 101, 108, 28 and 11 on through the manifold into the engine. As the air passes thi ough the passageway 101 it is concentrated around the fuelnozzle 97 by the valve 102 whereby the fuel that is'highly explosive while cold will be drawn into the passageway 101 and be mixedwith the air, producing thereby an explosive gas. As this gas passes through the screen 32 that has been lifted by the valve 33 it will take up some of the fuel from the screen and render cylinder of the engine it is explodedin the operation. After the engine begins discharging heated gases through the exhaust pipe, the heat will operate on the thermostat which is located in saidipipe in the pathway of the discharged gasJ-The mechanism connecting the thermostat with the The latch I128, sector plate 127 and lever 126' in Fig. 6. By ineans of this construction itand is controlled by a lever secured to the whereby air would be drawn up through the usual way and at once sets the engine into it explosive. After this gas has reached the valve 118will be operated and therebycause' this valve to move. into thecylinder 26 andby' said movement gradually open the port 119 and also gradually close the air passageway 108 whereby the priming fuel from the carbureter will be gradually diminished: and the intake of air through the port 119' gradually increased: The travel of the valve 118 is slow so, that the cutting out of the riming element isimperceptible and :with ut danger of stalling, orkilling the engine. On the other hand the carbureter supplying a fuel of restricted explosive quality while cold is given time to properly heat the fuel before the priming element is dispensed with. If it befound desirable to cut out the supply' of-priming fuel quicker than is done" by the action of the thermostat it can be done by use of the lever 126 which through a connecting mechanism-is adapted to manually move the valve 118. After the engine has been put into operation the throttle'valve can be used to increase or diminish the flowof gas to the engine as is done in an ordinaryengine.

As seen by the drawings the valve 52 cl'osing the auxiliary air port 51 can have a slight movement before uncovering the port.

This movement is sufficient to open the- .throttle valve enough to start the engine before uncovering this valve. After the enginehaabeen put into operation the opening of the throttle valve tospeed up the,

engine will uncover the auxiliary air port 51 and admit air between the throttle valve and the engine. The amount of the intake of this air'canbe regulated/by the sliding plate 67. The eflectof adding this auxiliary air .is to reduce the consumption of fuel and also to increase the efficiency of the gas as a power. producing element.

While this carbureter is especially, designed to operate with fuel of different degrees of explosive quality, yet the device is so constructed that .one fuel of explosive quality alone can be used equally successful andwithout any labor at inconvenience on the part of the engine operator.

. What I claim as my lnventlon and desire to secure by Letters Patent-is:

1. In a carbureting'device, a carbureting mechanism adapted to c ntaina fuel of restricted explosive quality while cold, means highly within said mechanism for heating "said fuel to render' it explosive after the device has been put into operation, a priming mechanism for putting the device into operation by supplying thereto a-gas\of highly explosive quality while cold, and a thermostat and lever mechanism for automatically and manually discontinuing the use of said explosive gas after the device, has been put into operation. 3

2. In a carbureting device, a carbureting mechanism adapted to supply an explosive.

gas. toan engine, an-auxiliary carbureting mechanism for priming said as to render it more explosive, a cylinder like construction connecting said carbureting mechanisms,.an air passageway leading from the outer air through the auxiliary carbureting mechanlsm and entering into said cylinder, an air passageway" leading out of said cylinder through the other carbur'eting mechanism, an

air port in the end of said cylinder, a piston likevalve in said cylinder normally closing said port, a thermostat connected with the exhaust pipe of the engine, meansconnectingsaid valve and thermostat so that heat from the engine will operate to close the air passageway from the priming mechanism and open the port in the end of the cylinder.

3; In a carbureting device, a carbureting mechanism adapted to supply an explosive gas to an engine, an auxiliary carbureting mechanism for primlng said gas to render it more explosive, a cylinder like construction connecting said carburet-ing mechanis fis, an air passageway through the priming mechanism that enters said cylinder, an air passageway leading from the cylinder through the carbureting mechanism, a port inthe end of said cylinder, a valve in said cylinder normally closing said port, means connected with the engine for operating the valve in said cylinder to uncover said port and to reduce the flow of priming element.

4. In a carbur ting device, a carbureting mechanism ada-p ed to supply an explosive gas to an engine, an auxiliary carburet-ing mechanism. for-prlmlng sa d as to render 1t .more explosive, a cyllnder 1 e constructlon connecting said carbureting mechanisms, an air passagewayleadlng from the outer air through the priminmmechanism and enter more explosive, a cylinder like construction connecting said carbureting mechanisms, an air, passageway leading from the outer a r through, the priming mechanism into said cylinder, a fuel nozzle in saidair passageway, a "fuel chamber and means to supply a I l liquid fuel to said chamber, a fuel passageway connecting said chamber with said nozzle, an air passageway leadlng from the cylinder' through the other mechanism, a port in the end of said cylinder, a piston like valve in said cylinder for regulating the flow of air through said air passageway and said "mechanism for priming said gas to render it r port, and means for operating said valve both manually and automatically.

6. in a carbureting' device a carbureting mechanism adapted to supply an explosive gas to an engine, a throttle valve for controlling the flow of said gas, a carbureting mechanism for priming said gas to render it more explosive, a cylinder like construction connecting the carbureting mechanisms, an air passageway leading from the outer air through the priming mechanism to the cyl inder, a fuel bowl in said priming mechanism and means for supplying fuel thereto, a nozzle in said air passageway, a fuel passageway leading from the fuel bowl to said nozzle, meansfor concentrating the air passing through the air passageway ,over said nozzle whereby suction from the engine will draw a supply of fuel from said nozzle, an air passageway leading from the cylinder, a port in the end ofsaid'cylinder, a piston like valve in said cylinder for controlling flange of the fuel bowl and forming between the said flanges a fuel passageway leadingfrom the fuel bowl into the carbureti'ng chamber, meansfor heating said fuel passageway whereby the fuel when converted into gas will-be made explosive and means for priming said gas to render it more explosive before it is heated. e

8. In a carbureting device, a fuel bowl adapted to contain a fuel of explosive quality when heated, means of supplying fuel to said bowl, an upwardly extending tubular flange integral with said fuel bowl forming an air passageway, a vcarbureting chamber closing the upper end of th fuel bowl and having a downwardly extending tubular flange loosely surrounding the tubular flange of the fuel bowl and forming between said flanges a fuel passageway from the fuel bowl to the carbureting chamber, means for heating said passageway, a gas passageway leading from the carbureting chamber, a throttle valve in said gas passageway, an auxiliary air valve insaid passageway between *thethrottle and the engine, and means for priming said gas with a highly explosive fuel to render it more explosive when starting the engine.

9. In a carbureting device, a fuel bowl Locate? I adapted to contain a fuel of explosive quality when heated, means for supplying fuel to saidfuel bowl, an upwardly extending tubular flange integral with said fuel bowl and centrally located therein and forming an air passageway, a carbureting chamber closing the upper end of the fuel bowl and having a downwardly extending tubular flange loosely surrounding the tubular flange of the fuel bowl and forming between said flanges a fuel passageway that extends from the fuel bowl into the carbureting chamber,

a heating device secured to the tubular flange of the carbureting chamber, means for supplying heat to said device so that fuel passing from the fuel bowl to the carbureting chamber will be converted into an explosive gas, and means for priming said gas before it has been heated to'render it more explosive.

10. In a carbureting device, a fuel bowl adapted to contain a fuel of explosive qualto said fuel bowl, an upwardly extending tubular flange integral with said fuel bowl and centrally located therein and forming an air passageway, a carbureting chamber closing the upper end of the fuel bowl and having a downwardly extending tubular flange loosely surrounding the tubular flange of the fuel bowl and forming betweensaid flanges a fuel passageway that extends from the fuel bowl into the carbureting chamber, a heating device consisting of a cylindrical casing secured to the outer wall of the tubular flange of the carbureting chamber, means for supplying heat to said device so that-fuel passingfrom the fuel chamber to the carbureting chamber will be; converted into an explosive gas, and means for priming said Jity when heated, means for supplying. fuel gas before it has been heated to render it 7 explosive while cold. 11. in a carbure adapted to contain a fuel of explosive quality when heated, means-for supplying fuel to said fuel bowl, a carbureting chamber closing the upper .end of said fuel bowl, a fuel passagewayxleading from the fuel bowl to the carbureting chamber, means for heating said passageway, an air passageway leading into the carbureting chamber and means for deflecting air passting device, a fuel bowl ing through said air passageway across the uppersurface of the fuel passageway whereby 'the airand fuel will be mixed, a gas passageway leading out of the carbureting chamber and means for controlling the flow of said gas, an auxiliary fuel bowl adapted to contain a fuel of high explosive qualities when cold,-means for supplying fuel to said bowl, and means for using the highly explosive fuel while cold to prime the fuel of-restricted explosive quality while cold to render the latter more explosive.

12. In a carbureting device, a fuel bowl chamber and means for deflecting the air passing therethrough across the upper surface of the fuel passageway whereby the air and fuel will mix, a gas passageway leading out of the carbureting chamber and means for controlling the flow of said gas, an aux iliary fuel bowl adapted to contain a fuel of high explosive quality when cold,.means for supplying said bowl with fuel, a'cylin derlike device closing the upper surface of the auxiliary fuel bowl, an air passageway through said cylinder, a port in the "end of said cylinder, a valve normally closing said port, an air passageway through the auxiliary fuel bowl and communicating with the other air passageways, a nozzle, 3, fuel pas-. sageway leading from the auxiliary fuel bowl to the nozzle and meansfor concentrating air over the port in said nozzle, means for holding the air passageways incommunication until the highly explosive fuel has been mixed with the explosive fuel of restricted quality thereby rendering it explosive whereby the engine may be started cold, and means for automatically cutting off the supply of highly explosive fuel after the engine has been started.

13. In a carbureting device, a fuel bowl adapted to contain a fuel of explosive quality when heated, means for supplying fuel to said fuel bowl, an upwardly extending tubular flange integral with said fuel bowl and centrally located therein and forming an air passageway, a carbureting chamber closing the upper end of the fuel bowl and having a downwardly extending tubular flange loosely surrounding the tubular flange of the fuel bowl and forming between said flanges a fuel passageway that extends from the fuel bowl into the carbureting chamber,

a heating deviceconsisting of a cylindrical casing secured to the outer wall of the tubu:

lar flange of the carbureting chamber, means for forcing a heatingelement through said device so that fuel passing from the fuel bowl into the carbureting chamber will be converted into an explosive gas, a channel in said heating device which alternates the direction of travel of the heating element as it passes through said device, means" for priming said gas to render itexplosive before the heating device has been put into op eration.

. l WILLIAMM. GENTLE;

Witnesses:

EDITH ALEX-H. Lmninzs.