US2444444A - Portable stove - Google Patents

Description

y 1948- s. T. HOWARD 4 2,444,444

PORTABLE STOVE Filed April 17 1944 2 Sheets-Sheet 1 Patented July 6, 1948 UNITED STATES PAT- L t k Howard, Jeifer s onvjillle, t Application Aprilll, 1944, SerialNo.f531, 143

. waned und rj the a me 5 3mm 7 The. invention described 1 herein if; patented, may be manufactured and fused by or j for the Government for governmental purposes without the payment to ine of hany"royaltylthereon. r

The invention relates to a single burnerfgas oline cook-stove in which the fuel is vaporized in a fuel tank. surroundin the burner, and he Vapor transmitted to the burner jet ,withontf further heating; j j f .Q-Q

The invention has (particular value-in connec tior fwith the provision of] heating unitgfer small detachmentsjof the armed fc irces of the United States. Ev'enla singleflfire unit of the gasoline fieldrange M-37, as shown in" myQP-ateritjNp.

2,331,913, October 19, 1953,} Fire; emit; carrying case andheater, is not adapted fortraneportation byhandjan'd useby sceuting; skiing phlpara t ouper groups. The portable singlejburn'erstove needed for use units and also for individuals must have no complicated or easilyldisordered parts, be rugged in construction, quick, sure and safe in use, as light in Weight as possible and e'asilypackedand carried. V a It is thereforean objectof this inyentijonjto provide a single burner gasoline Lsteve' which can be readily transported by individual soldiers and other members offlthe armed forces and" usedjte heat food or-water quickly and eificiently jwithi out danger bf accidlltpli of thetstovefailing to work through someinjuryfmaladjustmentfp posure to adverse oonditions I I I Y1 Itis' a'further object of r the inyentipnjto' ro vide a'compact stove unit comprising?! ody rotatably mounted on a "base, whereinthe burner valve is controlled "by the body and thebase. H; W v

It 1 further ec if h inv jiien b P 9 means'for handling thefstove when itfish nd rotating the parts, which 'means constitute operating wrenches for efiecting' qothe'r'lj adjust mentsand operations, in connectionwith the Furtherpbjeots drum inyention willbe a parent froma; consideration of the ens ing d scription taken in connection'Ywith thefac'c paying drawings, when: t t; *Fig; 1 is a perspectivewiew f the assembled stove with-the operating wrenches ny osmen e serveas handles for the stove. r

Fig.2 is an explodedviewof'thestove "he Wing from top to bottom; the detachable b'urherjt be; the stove body com osed of'fafuel tank arild pot sup drtg "the' burner valve and" the detaeha blte base. i 1 Fig. 3-is' a verticalsectional view through the relative rqtatioii petweea 192s; 370 -o e. 757

of March 3, 1883, as"

stovein the plane of the filler inlet,1showing the windscreen in place.

A t W e a perspective View of the windscreen. tIn Fig. l the body of the stove is designated A and comprises, as shown more particularlyin Fig. 3,a spherical fuel tank Hi having passage means therethroughfnaniely a cylindrical tube H ex:- tending through the center from toptob ottom and having both ends open. The tank ID has a uerpp ning including a funnel-shaped inlet 12 and a closureseat I 3, ,The inlet is closed by a screw plug l4 carrying a closure disk I 5 which :fits tightly against the seat l3 and is secured to the plug l t by means of a spl t pin I 6. The plug l4 isbroache'd at l1 to receive the polygonal wrench l8 forrernoving and inserting it. The spherical tank lfl also carries a potsupport l9 formed ofia plurality of bars welded to the body and re ns forced and secured together by a ring 2 I." v Th'e burner assembly 22Yis located centrally or thejcylindrical tube l land spherical tank lq and is's'upported on a fitting 23 permanently secured in the sidewall of thefcylindrical tube I I at 24 by brazing or other appropriate means; Thefitting 23 is hollow and terminates within thetank inthevapor inlet pipe 25, which extends to the upper part ofthetank and is surrounded bya spaced sleeve 26; Within the tube I I thefitting 23 carries a vertical tubular or sleeve portion 21 whichjis also broachedtoj receive the wrench lfl, Thelowerportion 0f the sleeve 21 is shaped to receivethe "flame qr burner valve 29 which'is threaded into the sleeve" for adjustment" at. 3! and Which thasa packing tightened by the nutjl, I The flame valve, asshown pmo're particularly in Fig. 2, consists of a 'cylindrlcal stern portiqn 32, athreaded portion 33 engaging the threads 39 offthe sleeveZl, the needle valve 34 anda TeheaId or handle 35, There is inserted in the uppenlpart oi the'cylindrical tubell abovetheburnerassembly'a removable burner tube 36 having a flared top 31 and a flame spreaderiifl 'securedwithin and slct. The protuberances 39 on the cylindrical wall of thebu r'ner tube 36 serve to secure the burner tube within the tanktube llby friction and t0 spacethe burner tube from the tahkhddY to'provi de a uniform blanket of airaround the burner "tube, thus preventin overheating of 1 the gasoline."

if The" baselB of the stove comprises seams} hemispherical base member 40. having arr nge 4,! extending fromits bottom to furnish a mor securesupportfor thestove. A tube 411s" at:

threaded at thetop to receive the burner jet 2a, a

tached to the top of the member 40 by a, flange 43, and extends upwardly to form a portion 44 of somewhat smaller diameter to be inserted in the tube l l of the stove body to support the body on the base. The portion 44 of the tube 42 is slotted at diametrically opposite points 45 to receive the extremities of the T-head 35 of the burner valve. A priming pan 46 of cup shape is secured to the base by the flange 43 which secures the tube 42 to the base member 40. Around the periphery of the base member 40 is provided a series of air vents 4'8, and on the exterior of the base there is an annular sleeve or shutter 48 rotatably mounted and having a series of apertures 49 which may be made to register partly or completely with the apertures 41 of the base member 40 to control the air supply to the burner. Lugs 50 are provided on the shutter formoving it relatively to the base. The base B is also provided with lugs on the flange 42 to be engaged bythe engineers wrench 52, which is employed to remove or adjust the packing nut 3! as well as for a handle for the base B. A wind screen 53 composed of two semi-cylindrical members hinged at 54 and having a series of air vents 55 is provided to enclose the stove when used in windy or stormy weather, particularly to confine the heat from the priming charge closely around the fuel tank; the screen is apertured to accommodate projecting filler plug I4 on rotatable tank A (see Fig. 3). The wrenches i8 and 52 are secured to the pot support by chains 56 and 57 which prevent their loss but permit their use in each of the relations described.

To operate the heater the userrshouldproceed as follows:

Lift the body A from the base B and remove the filler tube plug I4 from the tank filler opening, being sure the polygonal wrench i8 is inserted all the way. See thatthe flame valve 29 is closed, hold the tank H! with the filler tube funnel l2 upward and fill with gasoline until it is level with the opening when the tank is in vertical position. Pour into the priming cup 46 enough gasoline to heat the tank. In warm weather about half the amount the priming cup will, hold will be enough. Set the tank 60 on the base B with the flame valve stem handle 35 entering the slots 45 in the tube 44. Insert the long end of the polygonal wrench [8 in the filler tube plug l4. and place the engineers wrench 52 on one of the lugs 5| on the base flange 4!. Close the air holes t'l in the base by rotating the shutter 48; set fire to the gasoline in the priming cap. If wind interferes set the shield 53 around the stove. Immediately after the priming gasoline has burned out open the flame valve 29' about one quarter turn by rotating the tank I'D counter-clockwise and immediately apply a match to the slot in the burner tube 35. When the flame forms inside the burner tube open the air shutter 48. to give the. type of flame desired. To stop the flame rotate the tank clockwise until the flame valve 29 is closed. The heater should be cooled before refilling.

From the foregoing description it will be seen that theusual gasoline stove construction has been greatly simplified. By vaporizing the entire fuelsupply in the fuel tank, applicant has been enabled to omit both the vaporizing means in the fuel line and the means to place the gasoline in the tank under pressure. By locating the burner within the fuel tank, direct heat for vaporizing the gasoline is supplied, which is a simpler-and cheaper construction, and not dangerous in so smalla stove. The spherical shape of the. tank furnishes a construction sufficiently strong to withstand the pressure of the vaporized gasoline with a minimum of weight, and at the same time it provides a strong body for the stove, which carries the pot support and protects the burner from injury caused by rough contact with other objects.

Since the tank I0 is filled approximately half full, space above the gasoline for the vaporized fuel is provided and the burner inlet draws the vapor from the upper part of this space Where it is hottest. The inlet tube 25 is insulated by the jacket 26 to prevent condensation of the vapor before it reaches the burner jet.

By arranging the burner valve 29 so that it is operated by rotating the body A on the base B, and by providing inlet plug M on body A with a socket I! (see Figure 3) to receive removable polygonal wrench I8, I avoid the necessity of having a valve handle projectin from the tank where it would be heated by the burning of the priming charge, and it is therefore possible to placethe priming cup 46 directly below the fuel tank l0. By placing the priming cup lfidirectly below fuel tank H], a maximum amount of heat is delivered to the contents f the tank by burning the priming charge, which results in vaporization of the fuel in the tank and ignition of the heater. It is particularly important that there should be no uncertainty in the lighting or operation of the stove when it is used under war conditions. especially in winter or in the extreme North. By. the use of the necessary wrenches as detachable handles for the body A and base B, the entire device is reduced to a minimum number of parts with nothing likely to be lost and the whole capable of being packed within a cylindrical container of substantially the same dimensions as the width of the base and the height of the stove.

Having thus described my invention, what I claim is:

1. A liquid-fuel burner comprising a fuel tank rotatably supported on a base, a flame valve carried by said base, a, burner jet mounted on said tank in non-rotatablev relation therewith, means for relatively rotating said tank and said base, and mean-s to move said valve into and out of closing relationship with said burner jet as a result of the rotative movement of said tank on said base.

2. A liquid-fuel. burner comprising a fuel tank rotatablysupported on a base, a flame valve carried by said base, a burner jet mounted on said tank in non-rotatable relation relative to said tank and surrounded by said tank, means for relatively rotating said tank and. said base, and means to move said valve into and out of closing relationship with. said burner jet as a result of the rotative movement of said tank on said base.

3. Aliquid-fuel burner comprising a fuel tank rotatable on a base, a burner jet mounted on said tank in non-rotatable relation therewith, a flame valve in operable relation with said burner jet, meansfor relatively rotating saidtank and said base, and mean-s to move said flame valve into and out of closing relationship with. said burner jet as a result of the rotative movement of said tank on said base.

4. A liquid-fuel burner comprising in combination a base, a. fuel tank rotatable on said base, a burner jet. mounted on said tank in non-rotatable relation therewith, a flame valve carried by said base, said burner jet and flame valve being in operablerelation with each. other, means for relatively rotating said tank and said base, and means to move said flame valveinto and outof closing relationship withsaid burnerjet as, a result of the rotative movement of said tank on saidbasepq a 5. ,A liquid-fuel stove comprising :a fuel tank having a burner mcuntedon said tank in nonrotatable relation therewith, and a base, the tank beingrotatablymountedon the base, the burner having a flame valve, said flame valve and said base being interconnected whereby the valve is operated when the tank and base ararotatedrelative to each other, and means mounted on said tank to support a vessel above said burner.

6. A liquid fuel stovecomprisinga'base carrying a flame valve, a fuel tank having tubular vertical passage means therethrough and a; burner jet mounted within said passagemeans innonrotatable relation with said tank. and in operable engagement with said flame, valve, said burner jet: comprising a fitting havingan inletdirectly connectedttosaid passage-means, said fuel tank being rotatable on said base andoperating said burner jet by rotation relative, to said base.

7. A liquid-fuel stove comprising a burner, a fuel tank surrounding the burner and heatable thereby, and a base having means for supporting the burner and tank, saidJtank and burner being in non-rotatable relation relative to each other and rotatable together on said base, and a flame valve in operable relation with said burner and non-rotatably associated with said base, whereby the valve is operated by rotating the tank with the burner on said base.

8. A liquid fuel stove comprising a fuel tank having a burner mounted thereon and a base, the tank being telescopically and rotatably mounted on the base, the burner having a flame valve, said valve and said base having inter-engaging means whereby the valve is operated when the tank and base are rotated relatively to each other.

9. A liquid fuel stove comprising a tank, a burner mounted thereon, and a base having an upstanding flange on which the tank is rotatably and removably mounted, said flange having oppositely placed notches and said burner having a valve with a stem having a T-head received in said notches, whereby the burner valve is operated by rotating the tank and burner on the base.

10. A stove comprising a spherical fuel tank having a cylindrical tube extending through its center and having a, fuel inlet line entering the tube from the tank approximately midway of the tube and terminating in a flame valve and burner jet, a removable burner tube in the upper end of said cylindrical tube and a removable base engaged in the lower end of said cylindrical tube, said cylindrical tube being freely rotatable on the base, and the flame valve being provided, with means engaging the base detachably and nonrotatably.

11. In a liquid fuel cooking stove, a substantially spherical fuel tank having tubular passage means through its center, terminating at the top in a flame slot and at the bottom in a hollow hemispherical base having valved air openings, and a burner located substantially midway of said passage means through said tank and having a flame valve and a fuel inlet leading to the upper part of the tank, whereby the fuel is vaporized in the tank and supplied therefrom directly to the burner, the tank with the burner being rotatable n the base and the burner valve being nonrotatably engaged with the base, and being operated by relative rotation between the base and tank. 11 I l 12. A liquid fuel stove comprising a stovebody including a, not support and. a burner havingv a flame valve with adownwardly extending stem, and a base on which thebody is rotatably mounte ed, said valve stemand; said base being nonrotatably engaged, andthe body and basebeing provided with. means :engageable by: wrenches which form handlesfor rotating the body onthe' base to control the flame valve. 1,, 1 I 13. A stove havingabcdy portion comprisinga substantially spherical fuel tank having a burner, centrally located therein, the burnerhavinga flame valve with a downwardly extending stem, and a base on which said body portionis detach-3 ably and rotatably mounted, saidstem engaging: said base, detachablybutpnon-rotatably, said tank having an inlet provided witha plugahaving, a recess to Y receive a wrench and saidubase having wrench engaging lugs, and two wrenches secured: to the st-oveby flexible connectionsfor engaging the, stove body and basewhen they'are hot to' close the flame valveby rotating the body onthe base. 1 3i .14. A stove lcomprisingga vfuel tank having ea tube extending vertically therethrough and ahfiN-i ing a fuel inlet line entering said tube from said tank and terminatinglin a burner jet, aremovab'lev base engaged in the lower end of said-tuba-said tube being freely rotatable on said base, and a flame valve in operable relation with said burner jet and provided with means for engaging said base non-rotatably.

15. A liquid-fuel cooking stove, comprising a fuel tank having vertical tubular passage means therethrough, said tubular passage means terminating at the top in a flame slot and at the bottom in a hollow base having valved air openings, and a .burner having a, burner jet located within said tubular passage means, said burner having a fuel inlet passing directly from the burner jet through said tank and continuing within said tank to the upper part of said tank, and a, flame valve in operable relation with said burner, said tank with said burner being rotatable on said base, and said valve being non-rotatably engaged with said base and operated by relative rotation between said base and said tank, whereby fuel is vaporized in the tank by heat exchange from said burner and supplied from said tank directly to the burner.

16. In a liquid-fuel stove, the combination of a fuel tank having tubular vertical passage means therethrough, of a base carrying a flame valve and supporting said tank rotatably, and of a burner, said burner comprising a, burner jet mounted within said tubular passage means in non-rotatable relation relative to said tank and in operable engagement with said flame valve,.

said burner having an inlet tube extending into the tank and upwardly within the tank to a point adjacent the top, said burner operating to heat and vaporize the fuel in the tank, said flame valve being operated by rotating said tank relative to said base.

17. A stove comprising a fuel tank having a tube extending therethnough and having a fuel inlet line within said tank entering said tube from said tank, a burner jet fitting mounted on said tube in non-r0tatable relation relative to said tank and receiving the said fuel inlet line directly, a removable burner tube in the upper end of said first-named tube, and a removable base engaged in the lower end of said first-named r a tube, aid base carrying a flame valve in operable engagement with said burner jet, said tank being rotatable on said base and operating said flame valve by rotation relativetosaid base.

18. A liquid-fuel stove comprising a fuel tank having a burner non-rotatably mounted thereon, and a base, the tank being rotatably mounted on the base, a flame valve in operable engagement with said burner, said valve and said base being interconnected, whereby the valve is operated when the tank and base are rotated relative to each other, and socket means on said tank for removably inserting therein handle means for rotating said tank.

19. A liquid fuel stove comprising a fuel tank having a burner nonwrotatably mounted thereon, a base, said tank being rotatably mounted on said base, a flame valve in operable engagement with said burner, said valve and said base being interconnected, whereby said valve is operated by relative rotation of said tank and base, a projection on said tank for rotating said tank, and a screen positioned on said base, said screen being apertured to accommodate said projection.

20. A liquid-fuel stove comprising a fuel tank having a burner mounted thereon, and a base, the tank being rotatably mounted on the base, the burner having a, flame valve, said valve and said base being interconnected, whereby the valve is operated when the tank and base are rotated relative to each other, socket means on said tank adapted to receive handle means for rotating said tank, and a windscreen positioned on said base so as to surround said tank, said shield being apertured for removably inserting handle means into said socket means to rotate said tank without removing said windscreen.

STYLES T. HOWARD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 663,160 Dunlap Dec. 4, 1900 694,173 Newbold Feb. 25, 1902 1,281,345 Goldberger Oct. 15, 1918 1,500,962 Slezinsky July 8, 1924 2,120,078 Schrader June '7, 1938 2,335,096 Anderson Nov. 23, 1945 2,350,860 Anderson June 6, 1944 FOREIGN PATENTS Number Country Date 3,582 Sweden May 11, 1892 14,256 Great Britain 1895 48,748 Austria June 26, 1911 142,976 Austria Oct. 10, 1935

Images