US1735151A - Stove structure - Google Patents

Description

Nov. 12, 1929. V w. BLASKEWITZ ET AL 1,735,151

STOVE STRUCTURE Original Filed Aug. 27, 1926 7 Sheets-Sheet l BY a ias Zamkfifi.

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NovQlZ; 1929. w. BLASKEWITZ ET AL 1,735,151 STOVE STRUCTURE Original Filed Aug. 27, 1926 7 sheets-sheet 3 wines I nside Nov. 12, 1929. w. BLASKEWITZ ET AL STOVE STRUCTURE Original Filed Aug. 27, 1926 7 Sheets-Sheet 4 Nov. ,12, 1929. w. BLASKEWITZ ET A 1,735,151

STOVE STRUCTURE Original Filed Aug. 27, 1926 7 Sheets-Sheet 5 mes ,27": 5/326 A AQQW Nov. 12, 1929.

W. BLASKEWITZ ET AL S TOVE STRUCTURE Original Filed Aug. 27, 1926 7 Sheets-Sheet 6 6.25. Overiy BY 22725 7" llamZert' w A ORNEY.

Nov. 12, 1929. w. BLASKEWITZ ET AL 1,735,

STOVE STRUCTURE Original Fi-led Aug. 27, 1926 7 Sheets-Sheet 7 Patented Nov. 12, 1929 UNITED STATES PATENT OFFICE WILLIAM nLAsxnwITz ANn CLARENCE BURT OVERLY, or. DETROIT, CHARLES r.

LAMBERT, or enossn POINTE, AND JAMES IRONSIDE, or DETROIT, MICHIGAN, ASSIGNORS, BY MESNE ASSIGNMENTS, To cnAY'roN & LAMBERT MANUFACTURING COMPANY, or DETROIT, MICHIGAN, A CORPORATION OF DELAWARE STOVE STRUCTURE Original application filed August 27, 1926, Serial No. 131,868. Divided and this application filed luly 8, 1927. Serial No. 204,198.

This invention relates to stove structure and has to do more particularly with stoves of the liquid fuel type and the method of operating the same. It also results in important efficiencies and economies in operation in that the liquid fuel is preheated and generated in an efficient, novel manner, and the liquid fuel. generated into a gasis of an efiicient and uniform quality at all times."

The class of stoves referred to are at the present time manufactured in two forms, namely, portable, or folding stoves, typified by the oil and gasoline type, and permanent stoves or ranges adapted to be utilized as a permanent part of a household. The first type of stoves namely, the portable or folding type has presented many problems as to efficient and safe operation mainly due to the fact that the various parts have been necessarily detachable and relatively movable. The larger stoves of the permanent or range type have not present-ed the same difiicult problems as to eiiicient, safe operation as the iiolding type, but nevertheless even such large stoves have been more or less inefficient in what has been known as the starting or priming operation and have also been more or less inefficient in maintaining a proper fixed quality of combustible mixture under all conditions of operation.

In its preferred form our apparatus con templates the provision of a compact, unitary stove structure parts of which are so permanently arranged and so fabricated as to present a novel rigid stove construction substantially as natural in appearance and as serviceable as a standard liquid fuel range but which parts are also so arranged and fabricated as to present a stove structure, parts of which are unitary and permanent, but which may be folded or collapsed as a unit. i

A further feature of the invention has to 1 the correct and efficient operation of the unit,

This application is a division of my copending application, Serial No. 131,868, filed August 27, 1926.

In the drawings:

Fig. 1 is a perspective view of a foldable stove unit embodying the features of our in- I vention and illustrating the stove in extended operative position.

Fig. Q'is a vertical sectional view taken transversely and centrally of the stove unit and illustrating the positioning and cooperation f the various parts preparatory to the creating of the initial hot blast for initially heatingthe generator. I

Fig.3 is a view similar to Fig. 2 but showing the various parts in extended normal operating position and also showing the man nor of collapsing the preheating unit to form a mixing chamber, and the preferred manner of positioning the jet block when. the parts are in such operating position.

Fig. .4 is a plan view, partly broken away,

of tie manifold and burner units illustrating the novel manner of maintaining a uniform quality of fuel mixture.

Fig. 5 is perspective view of ournovel unitary gas generator and fuel. supplying unit, and the compact manner of forming and fabricating the same so as to obtain the novel cooperation of the various parts.

Fig. 6 is a perspective view, partly broken away, of one end of the manifold and the burner structure and showing the novel inanner of controlling the introduction of fuel to the burner and also showing the manner of conducting the fuel to the central. burner in case the supply of one burner is cut off.

Fig. 7 is an enlarged, fragmentary per- 'spective view of our novel, combined preheater and mixing chamber and illustrating the housing tnerefor in open position preparatory to preheating the generating tube for starting the apparatus.

Fig. 8 is a vertical sectional view taken on line 88 of 7 and illi the cross sectional form of the enlarged end. of the generating tube, the wick, r well, for the gasoline charge and main manifold passagewa Fig. 9 is a cross sectional View taken on line 99 of 7 and showing the particular and relative positions of the various air ports and the manifold intake for obtaining the correct fuel mixture.

Fig. 10 is fragmentary, horizontal cross section of our novel manifold structure and illustrating the manner of conducting and by-passing the gases to the central burner.

Fig. 11 is a vertical sectional view of the central burner taken on line l010 of Fig. 3.

Fig. 12 is a fragmentary sectional view taken through the stove casing and illustrating the n anner of locking the supplying and generating unit in extended position.

Fig. 13 is a fragmentary sectional view illustrating the manner of locking the protecting shields in place to retain the shield and cover in operating position.

Fi ll is a vertical sectional view taken on line ll1et of Fig.

In describing the various parts of our in vention it will be well to recognize that the apparatus preferably used therein separable broadly into a compact, foldable unitary stove unit, parts of which are all permanently and operatively connected, preheating, and

generator mechanism, and fuel distributing apparatus. These three combinations are relatively independent in the sense that any one of them may be removed and replaced by other apparatus designed to accomplish the same results, but which are relatively dependent and cooperate to obtain the do 'ired general results. 7

This foldable unitary stove unit is best shown in l as comprising a stamped et metal case 1, a foldable to 9 member 2 v 1 1 e w rc uable wind deflectors 3 and a hinged thereto, and a hinged foldable member, I)

much forms the handle member when the case is folded and is adapted to drop down when the case is unfolded to permit withdrawal and positioning of the fuel tank unit. lhis fuel supply unit comprises mainly a fuel tank 6 which is suitably supported by means of the bracket 7 to the slide member '8 which serves a frame for assisting and innermost predetermined secured to the side walls 4- :L. c tithe lillio Fr have roller bearing contact by means of the rollers 11 and 12 with the top and bottom sides of said guide members 10. A gener- 1 ng tube 13 is permanently connected to the fuel supply tank 6 and a suitable heat deflector 1% and is also carried by this fuel supplying unit whereby the heat deflector 1% cooperates with the wall of the case when the fuel supplying unit is extended in open ating position. This heat deflector is a ver important feature as it permits the fuel supplying unit to be inwardly or outwardly positioned as unit without the disconnect ing or rearran ing of any parts, and serves as a permanent heat deflector when the fuel supplying unit and stove structure in general is in normal operating position.

. s best s lou n in Fig. 5 the slidable frame i" provided screws with suitable lugs and 5 for limiting the outward movement of the burner, and the sliding frame is also provided with suitable gravity catches 16 for automatically dropping into position and locking the fuel supplying unit in outer position. The slidably suoported unitary fuel supplying means is limited in its innermost position by contact between the shield ll and the radiator shield for the burner, as best shown in Fig. 2. This innermost and outermost predetermined position of the fuel supplying unit and the generator tube 13 has a very important function in the operation of applicants device, as will be more fully set forth in detail. F or the present purpose the posicion of the fuel supplying unit may be called the preheating position, and the outermost predetermined position may be termed the operating position. It will therefore be obvious that my fuel supplying means, together with the protecting shield therefore not only is extensible and collapsible to perform a definite flUlC- tion, but that such unit also slides neatly into place, or out into operating posi ion as a permanent part of the stove, requiring no disconnection or adjustments. vi hen the unit is in innermost position, the com inod cover plate and handle portion 5 may be moved into position, and such cover plate is provided with suitable lugs 17 for receiving the late members 1801 the case top 2 to loc" the case into usse nl ed position so as to mate it easier to carry i te the general appearance of a J suitcase, similar article. r

The tr the runn number, corr members 9. These tra s:

the tracl members r are connected a cross piece 19. ma be inserted as 10, which ain the stove i 7 l0 wholly su port the fuel tracl; member supplying unit, and the cross member 19 supports the burner manifold, as shown in Fig. 3, it will be obvious that the entire stove unit is supportedas a unit independently of the carrying case, whereby such case may be dented orotherwise damaged without injury to the various units of the stove whereby they can be removed and assembled in another case if desired.

The bottom part of the case 1 is preferably formed with a stamped member 20 which cooperates with the side members of the case, as best shown in Figs. 2 and 3. whereby said cooperating parts may be welded. riveted, or otherwise suitably connected. This bottom portion is preferably embossed or struck out, as at 21, and is also provided with suitable perforations 22, spaced throughout the bottom thereof for providing proper air circula tion. This bottom portion 20 is preferably so embossed or struck up, as at 21 whereby it may be fitted into or be supported by a stand having an annular frame member formed to receive this struck up or embossed portion, as shown in dottedlines in Fig. 2.

The top part of the case 1 is suitably formed, as at 23, to receive suitable grate members 24. The particular stove illustrated is provided with three separate members 24, the center grate member being hinged to the casing and also having a slidable connection, as at 25, with a part of the preheating and mixing housing, as will be later describedin detail. The function of this hinging of part of the preheating and mixing housing tothe hinged burner isthat by merely lifting the hinged burner up, as shown in Fig. 2, the preheating and mixing chamber is opened and positioned to operate as a preheater, and when the grate is pushed down into normal position, as shown in Fig. 3, the preheating fund mixing housing is collapsed or closed in normal operating position.

The Windshields 3 and 4 of the stove casing are hinged to the top member 2, as clearly shown in Fig. 1, and are foldable therewithin, and when in extended position these windshields are adapted to be positioned and held in contact with these end members of the easing 1 by the resilient lugs 26, best shown in Figs. 1 and 13. These resilient lugs are bifurcated and are preferably provided with suitable stud 27 which is adapted to register with suitable apertures in the ends ofthe easing member 1.. It will therefore be obvious that in unfolding or extending the stove casingby merelyopening up the'shields 3 and 1 and pressing the bifurcated members 25 into position, that the top 2 and side shields 3 and 4C are held in closed position whereby to completely shield the stove from the sides and the rear.

The preheating and gas generatingmeca.

anism is best shown in Figs 2,3 and 7. This mechanism comprises two shdably positioned cooperating members one of which is thegeu erating tube 13, and the other may be termed a combined preheating and mixing chamber and may be generally designated 30.

The generating tube 13 is preferably of such length that its end will be positioned adjacent the. back of the member 30 when the unit is in closed position, and positioned just adjacent the front of the member 30, as shown in. Fig. 3, when in open or )perating position. This tube 13 is preferably screw fitted within a suitable valve housing 31 controlled by a suitable valve member 32. This valve housing 31 is designed to be fitted at the end of a suitable nozzle member 33 which is secured to and positioned within the fuel supply tank 6, as best shown in Figs. 2 and 3. I

The end of the tube 13 is preferably expanded, or enlarged, as at 34, for a consider able portion ofthis length and. the end of such enlarged portion 341 is provided with a suitable jet block 35, the valve controlling member 32 comprising a suitably shouldered valve for cooperating with the valve seat in the valve housing and is also provided with a rod 36 which extends the full length of the generator tube 13, and which is provided with a suitable wire at the end thereof, as clearly shown in Figs. 2 and 3, which wire projects through the orifice opening in the jet block and thus keeps the same clean at all times. This wire is'designed to be projected through the orifice in the jet block whenever the valve stand 33 is moved forwardly into closed posi tion. Corresponding to the interior diameter of the tube 13 is a coil wire37 which is positioned around. the rod 36 and extends from one end of the tube to and against the jet block 35. The purpose of this wire is to assist in the forward propulsion of the liquid fuel of the generating gas by capillary ac- .tion so that a positive feed is'secured. It

will beobvious that the feed of the liquid fuel, or gas, is by means of an annular helicalpath surrounded or bound by the rod 36, the tube 13 and small coil wire 37 would op erateto feed the liquid fuel and gas in a fairly satisfactory manner after once heated by the central burner which may be here designated 38, but preferably a distinct advantage is attained by expanding or enlarging the end of the generator tube, as at 34. This enlarged portion is provided with a larger coiled wire which 'surroundsthe coil wire/37, as is clearly shown utilizing this larger tube, which is enlarged at its effective part, and the additional coiled wire 39, that the liquid fuel will. be conducted to the generating .zone in a larger annular spiral stream, and the surface of the tube being considerably larger, it will'further be obin Figs. 3 and 8. It will be obvious that by the heat from the. burner larger amount of fuel is contained. within the generating tube 13 between the valve housing 'vious that a muchlarger surface is exposed to r 38, and I a much 81 and the jet block Thus, as far as norir l operation of the stove is concerned, it will be obvious that when once operated, that a larger area and a larger amount of fuel may be more efficiently heated and thus positively and effectively vaporized or gasified, and also be expelled under greater pressure.

Another important feature of this design of generating tube is brought into play when the generating tube is used as a primer, or in other woros, is used in combination with the combined preheating and mixing chamber to initiallly start the stove.

Taking up first the construction of the combined preheating and mixing chamber, it is preferably formed of a hollow casting which is so cored as to provide a conduit formation for conducting the vaporized gases to the main manifold, and also provided with cored portions ll and e2-for conducting the air to a point adjacent the jet block when the same is in operating position. The unit or housing is also provided with suitable passageways l3 in the sides thereof which are formed by a suitable channel formation in the casting and suitable wings ll which are positioned against such channel formations whereby to form a passageway for auxiliary air, as well as to form a shield against unnecessar i drafts. The wings e't are outwardly turned at their lower enlarged ends, as shown in Figs. 7 and 8, and the upper end of the passageway formed by the wings and the channels 43 cooperate with suitable air inlets at each side of the upper end passageway 42. We thus have three separate air inlet-s adjacent the jet block 35, when so posit-ioned in Fig. 3, one formed by the passageway :2 and the other two by the inlets d5 at each side of the casting. The casting is provided with a support or guide member l6 which is suitably secured thereto andwhich adapted to support and guide the enlarged end of the tube 13, as best shown in Fig. 2..

This support is positioned centrally of the top part of the casting, and the top part of the cast n surrounding the support- 46 is inachineu, that is, the inside of the walls are machined and are tapered boss 48 is machined.

Adapted to be hingedly connectedto the casting formin the main part of the member 30, is an L-shaped member 50, the upper part of which may be designated 51 forms a U-shaped chimney structure, machined on the sides, at 52, and on its tapered ends, at 53, the machined side 52 cooperating with the inner machined surface of the casting, and the machined ends 52 cooperating with the machined boss :8. The bottom leg of this L-shaped member 50 is formed into a shallow pan 5% and is provided with a suitable wick member 55, as shown in Figs. 2 and 7. This pan is designed to receive a small amount of liquid, as will be presently described, in order to initially start the stove.

The connection between the leg 54 and the leg 52 is by means of a curved depression 56, which is so formed that the gases issuing flames from the jet block 35 are baffled and directed from the curved surfaces thereof backward against the enlarged portions 34: of the generating tube.

The upper end of the valve 50 is slidably connected wit the grate member 2 as at 25, and when the combined preheating and mixing chamber is used as a preheating chamber, the grate is raised upwardly, as shown in Fig. 2, whereby the member 50 will be positioned as shown in Fig 2, and this position of member 50 transforms the combined preheating and mixing chamber into a preheating chamber when the generating tube is positioned at its innermost position as illustrated in Fig. 2. lVhen the member 50 is moved downwardly into closed position whereby the machined parts are in contacting relation, as shown in Fig, 3, then the member 50 is transformed into a mixing chamber, the generating tube being withdrawn to the position shown in Fig. 3, whereby the vaporized, or generated gases, may be expelled from the jet block 35, and conducted through the passageway e0 towards the main manifold.

The fuel container 6 is pu'eferably provided with suitable pump 60 which is suitably secured to the container shell and which is connected to the interior thereof by means of valve plug 61. The piston rod, or pump rod 62 is designed to be held in inwardly sealing position by means of a suitable lug 63, positioned on the container shell.

In operation, suitable pressure having been set up within the container by means of the pump 60, and the fuel supplying member being positioned inwardly, as shown in Fig. 2, the valve 32 is opened very slightly whereby a small amount of liquid fuel is introduced to fill up the generator and to expel a small amountof fuel just suliicient to moisten the wick member 55, the grate 2e and chimney 51 having been raised to open position. This liquid fuel in the pan 54 is ignited by any suitable means, and the enlarged end of the generator tube will be initially heated by the burning of the fuel in the pan. However, due to the extremely large heating surface of theportion 34 of the tube, and the directing of the flames from the pan 54 upwardly around the tube, by the chimney 52, he enlarged-portion of the generating tube will be heated with sufficientintensity, and in a very few seconds,'whereby pressure will be set up within the tube by the inherent gasification of some of the fuel in the tube. This gas will then be expelled under pressure and will be directed against the curved portion 56 whereby a blast will be created and directed rearwardly back against the enlarged portion 34. This blast will gradually increase in intensity and as the entiretube 13 holds a large amount of fuel as a result of its length and its enlarged port1on,'enough fuel bemgpresent, a sufficiently intense blast will be created so that the tube 3t-will be sufiiciently heated to cause any liquid introduced into the tube to be immediately generated into a withoutthe necessity of again turning on the valve In other words, it is only necessary to turn the valve on once to fill up the tube and after all the fuel has been expelled and the flame dies out, or before the dying out of the flame, the chimney 52 may be lowered by lowering the grate 54, and the fuel supplying unit may be moved to operating position corresponding to the position shown in Fig. 3. vWhen in this position the jet block 85 is positioned within the housing, as shown in Fig. 3, and the enlarged part of the tube is positioned just over the burner 38, and by then opening the valve 82 the fuel introduced into the tube 13 will be immediately gasified, or vaporized, and this vaporized fuel emitted by the jet block will be conducted through the mixing chamber 80 and around the passageway 40 into the main manifold which leads to the burner 88. As the gasified fuel passes the air inlets and 45, air will be drawn and mixed therewith to form the proper combustible mixture, these air inlets being predetermined as to size, as will later be described. This mixture being fed to the burner 38 and then ignited, the flames arising from such burner will then heat the enlarged portion 34 of the tube to cause continuous gasification of the fuel whereby the stove may be operated and regulated in a nor mal manner. It will be obvious that this structure, in additionto being a more efficient quick acting arrangement, is also a very safe arrangement, in that the valve 22 is not opened until the unit is in condition for normal operation. This is made possible by the fact that the tube 34 is enlarged and contains enough fuel to cause a blast to be directed against the outside of the tube without the necessity of opening the valve 32 andrelying upon the pressure within the tank 6. In other words, the initial pressure for effecting the blast is inherently set up by the fuel within the generating tube. When the member 50 is loweredinto closed position the lower leg serves asadefiecting member for deflecting the path of the gases as they are emitted from the jet block 35.

The jet block isso positioned when the stove is in normal operation that it is shielded by the housing of the member 30, as shown in Fig. This end of thejet block is therefore never heated up sufficiently to cause the adherence of carbon thereto dueto the cooling action. Due'to the positioning of the springs 34 and 39 within the generating tube, when the valve '32 is closed and the stove shut off, all of the gas therein will be expelled through the capillary action and no gases or fuel will beleft in the tube to adhere and carbonize the interiorwalls of the strike the curve 56 at the proper point to y be redefiected against the tube. When the generating tube is moved into operating position, as shown in Fig. 3, the stops 15, together with the latches l6, serve to lock the tube and position the jet block in the qhousing whereby the proper mixture and quality of fuel and air is obtained to effect the most eilicient combustible mixture so as to obtain at all time a uniform blue flame. supplying unit is not moved outrfar enough to cause the latches 16 to drop into position the operator would. not-ice a yellow flame caused by the improper mixture with the air, and will then immediately move the fuel sup ply unit to its extreme locking position and thusobtain a blue flame.

The fuel distributing apparatus consists of a manifold and a cooperating burner structure whereby the gases when once formed, or

vaporized are conducted to the burner in such If the fuel a manner as to obtain the proper quality of I fuel at each burner at all times independently of the relative operation of each burner. This fuel distributing system may be connected up with any suitable generating apparatus, but is particularly adapted with the combined preheating and mixing chamber, the generating apparatus forming a part of the present invention. This novel distribution of the fuel is obtained by means of a novel manifold which is best illustrated in Figs. 4; and 10. The manifold portion 40 of the mixing chamber 30 is secured to the manifold 65 by means ofsuitable screws 66, asshown in Fig. 10. This manifold 65 is provided with two main passageways 67 and 68 leading inopposite directions from the point of connection of the mixing chamber to the manifold. Such manifold is also provided with suitable passage ways 69 and 70 which are connected at the ends thereof to the main passageways 67 and 68 by means of suitable rotary valves 71. The ends of the manifold 65 are provided with suitable upwardly extending projections 72 and are connected to'the rotary valves by means of a suitable passageway 73.

The central part of the manifold is pro vided with an upwardly extending part74 which is adapted to conduct gases to the 'center burner38 from any or all of the passage. ways leading from the inlet passageway 40. In other words, th central passageway 75 which leads directly to the burner 38 is bypassed into the main passagewayby means of a. suitable by-pass 76.

The rotary valves 71 are provided with suitable apertures 78, which cooperate with the passageways 6'7 and 69 at one end, and

and 70 on the other end and the burner passageway 8 to direct the gases to the end burners, one of which is illustrated in Fig. 6,

er 38. In other words, instead of a lineal manifold, we have provided a continuously eii ulating manifold, whereby the correct quality of izrture having been once predetermined all the gases produced are. continuously circulated. As a result we obtain no congestion of thegases, noback pressure, and no dead? spaces to. destroy the quality and proportion of the mixtur The burners arepreferably of the same size and are best illustrated: by the burner shown in Fig. 6, which is an end burner and which may be designated 80, Each burner is surrounded by radiating and air deflecting shield 81 whereby the heat is radiated upwar lly all unnecessary drafts are shield ed and deflected. Positioned to extend into thepassagewaysfi'? and 68 are suitable pilot tubes 82 which are preferably closed at their upper end and are slotted, as at 83, to present orifice openings of relatively large size whereby a small pilot flame is CODilIlLlOUSlf/ maintained at all times adjacent the burner 80. These openings-are preferably slottedbut may be formed by a plurality of small apere tures effective. to cause efficient burning of the pilot lights. But an additional feature which assists in maintaining the pilot lights is the fact that the gases are. continuously circulated in the manifold. whereby a proper'quality of the mixture is maintained at all times adjacent the pilot light tubes, and a proper quality of the mixture of fuel is supplied to the pilottubes to cause an even, continuousburning. It will be obvious, therefore,that any one of the burners other than the generating burner may be turned off asv desired and relighted asdesiredby means of the pilot flames, and that when suchburners are turned oil, all the gases, except those utilized by the pilot light, are preferably circulated to the generating chamber positioned beneath the generating tube. y

The valve handles controlling the operation of the auxiliary burners may be designated 85 and are preferably connected with the rotary valves by means of valve stems 86.

er, or plurality of burners are therefore shut out and the gases by-passed into the generatng burner, it will be obvious that there will still be a blue flame.

What we claim is:

l. A stove construction of the liquid fuel type, comprising a permanently supported b er structure, combined pie-heating and m ng. men'iber secured thereto, and a fuel supply unit siidably mounted in the stove casing and movable as a unit to one position inside of the casing to cooperate with the pre heating uni to initially vaporize the liquid fuel and then movable as a unit to a position outside the casing to cooperate with said mixing chamber and burner to maintain the fuel under normal operation.

2. ii stove construction of the liquid fuel type, comp ising a fuel cont iner slidable within the stove casing, a generating conduit rigidly co nected to saidv container, a valve for adn' ing. fuel from said container to said conduit at the point of said connection, and a preheating member including means cooperating with said conduit when the container is noved to a position within the casing for direc ing flame from said generating conduit back against the conduit.

3. A stove structure, comprising a casing, combined fuel supplycontainer and coneuit slidably mounted tomove through a wall of said casing, a combined pro-heating and mixing member, said conduit being longitudinally movable to cooperate with said member, and means for positioning the conduit relative to said pro-heating and mixing member when utilized as a pre-heater.

i. A stove structure, comprising a casing, a combined fuel supply container and conduit slidably mounted to move through a wall of casing, stationary combined preheating member and mixing chamber, cooperating with said conduit, and means for positioning the container and conduit in a predetermined position relative .to the combined pie-heater and mixing chamber when utilized as a mixing chamber.

5. A stove construction, comprising in combination, a plurality of permanently positionedburners and a fuel supply unit consisting of a container and a generating conduit movable in a horizontal plane and slidable as a unit in constant alignment with and relative to one of said burners.

6. A stove construction, comprising in combination, a plurality of permanently posi tioned burners, a blast deflector and a mixing chamber and a fuel supply unit consisting of a container and a generating conduit slidable as a unit relative to one of said burners, said unit being movable in a horizontal plane and slidable within the stove frame to cooperate with the blast deflector to serve as a preheating unit and being slidable exteriorly of the frame to cooperate with a mixing chamber to serve as a normal generatin unit.

7. A stove construction, comprising in combination, a plurality of permanently positioned burners and a fuel supply unit consisting of a container and a generating conduit slidablc as a unit relative to one of said burners, said unit being movable in a horizontal plane and slidable within the stove frame to serve as a preheating unit and being slidable exterior-1y of the frame to serve as a normal generating unit, and a shield forming an integral part of said slidable unit for shielding the container from the heat of said burner or burners.

8. A stove construction, comprising a slidably mounted generating unit and a combined pre-heating member and mixing chamber cooperating therewith, a part of'said combined preheating unit being secured to the stove grate whereby raising the grate will transform the combined pre-heating member and mixing chamber from a mixing chamber to a pre-heating unit.

9. A stove construction of the liquid fuel type, comprising a stove casing a fuel supply unit slidably mounted within said stove casing, a generating tube secured thereto, a stationary mixing chamber in constant axial alignment with said tube, and means for positioning the fuel supply unit in a predetermined position whereby said generating tube and mixing chamber are properly positioned.

to provide a proper quality of combustible fuel.

10. A stove construction, comprising a housing, a fuel supply unit slidably mounted and supported within said housing, the means for slidably supporting the fuel supply unit also stationary supporting the burner structure and manifold structure, whereby the parts including the fuel supply unit, burner and manifold are supported as a common unit within the housing.

11. A stove structure, comprising a housing, fuel supplying means comprising a con' tainer and generating conduit slidably supported as a unit by said housing, and a shield mounted on said unit and positioned adjacent the container to serve as a heat deflector shield when said unit is moved to operative position.

12. A stove construction, comprising a plurality of stationary burners, a housing forming a mixing chamber positioned relative to one of said burners, and a slidable fuel supply unit having a generating conduit slidable within and guidedby said housing, a manifold structure for directly connecting said burners, and means for connecting said housing to said manifold wherebyto supply said burners. I

13. A stove construction of the liquid fuel type, comprising a combined prcheatiug member and mixing chamber, a pivoted grate, and means for s-lidably connecting part of the wall of said chamber to said grate.

14. A stove construction of the foldable type, comprisinga case for enclosing and carrying the same, a fuel supplying unit separate from the burners and slidable through a wall of said case, part of said case being hinged to permit said sliding of said unit, said hinged portion being folded to close the case and to serve as a handle supporting portion when the case is closed. i

15. A foldable stove structure comprising a stove framework and a track structurese cured therein, and a fuel supplying means including runner members slidable within said tracks, said stove structure including a mixing chamber and said fuel su iplying unit including a generating conduit, and roller members between said runner members and said tracks whereby said fuel supplying unit will have a free horizontal movement and will be accurately guided to position the generating conduit relative to the mixing chamber. i g

16. A stove construction of the liquid fuel type, comprising a casing, a burner positioned therein, a mixing chamber having an entrance head for receiving fuel and air, a preheating member in alignment with said entrance head, and a fuel supply unit comprising a fuel container and a generating tube rigidly mounted thereon, said unit being horizontally slidable into and out of the casing, the end of said generating tube being positioned adj acent the entrance head of said mixing chamber when said supply unit is positioned outside of the casing, and being movable through said entrance head and positioned adjacent said preheati.1igniembe1' when said fuel supply unit is positioned inwardly of the casing.

17 A stove construction, comprising a casing having side frames and a hinged lid, a fuel supply unit consisting of a tank and generating tube mounted thereon and at right angles thereto, a burner, a mixing chamber for conducting combustible fuel thereto and having an entrance head, and a preheating member, said burner, entrance head and preheating member being positioned in alignment with each other and with said generating tube, said unit being slidable through the stove frame whereby to position the end of the generating tube over the burner adjacent the entrance head or of the side wall cooperating with move the same through the entrance head and ad acent the preheatlng member.

18. stove structure, comprising a casing, a combined fuel supply container and conduit slidably mounted within said casing and movable through a wall thereof a combined preheating member and mixing chamber cooperating with said conduit and means for positioning said container and supply conduit relative to a part of said preheating member and mixing chamber when utilized as a preheater, and means for positioning said container and supply conduit relative to another part of said combined preheating member and mixing chamber when utilized as amixing chamber.

19. A foldable stove structure comprising a casing made up of side walls on the bottom and a hinged top, part of one of said side walls being hinged and movable to present an aperture a fuel supply unit slidable through said aperture, said hinged portion said hinged top, whereby said hinged portion will be held in assembled position to complete the stove casing when said hinged top is in closed position.

In testimony whereof we aflix our signatures.

CHARLES F. LAMBERT. VILLIAM BLASKEWVITZ. CLARENCE BURT OVERLY. JAMES IRONSIDE.

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