US2465572A - Portable stove for burning liquid fuel - Google Patents

Description

March 29, 1949. c. BRAMMING PORTABLE STOVE FOR BURNING LIQUID FUEL 4 Sheets-Sheet 1 Filed April 15, 1945 v INVENTOR. CARL 52A MM/No.

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AT'TOENE Y March 29, 1949. c. BRAMMING 2,465,572

PORTABLE STOVE FOR BURNING LIQUID FUEL Filed April 15, 1943 I 4 Sheets-Sheet 2 p 22 VII/ff 17 5 Z .17 R\ Z2 ATTO/QNEQQ II/I c. BRAMMING 2,465,572

PORTABLE STOVE FOR BURNING LIQUID FUEL 4 Sheets-Sheet 3 March 29, 1949.

Filed April 15, 1945 .fNI/ENTOR A CA FL DRAMA/1N0 ,4 TTOENE Y March 29, 1949. c. BRAMMING' 2,465,572

PORTABLE STOVE FOR BURNING LIQUID FUEL Filed April 15, 1945 4 Sheets-Sheet 4 I 7 INVENTOR.

CARL BEAM/YI/NG.

W wwmzam ATTORNEY.

Patented Mar. 29, 1949 PORTABLE STOVE FOR BURNING LIQUID FUEL Carl Bramming, Anderson, Ind., assignor to The Mantle Lamp Company of America, Chicago, 111., a corporation of Illinois Application April 15, 1943, Serial No. 483,107

This invention pertains to an improved construction of portable stoves for burning liquid fuel, in which the entire structure is of very small size and weight so that it may readily be made a part of traveling or portable kits used by soldiers, hunters, explorers and the like.

The following considerations are involved in the construction of the stove, which are included in the objects of the present invention: (1) that the stove shall be of minimum size and weight 13 Claims. (Cl. 15833) I ried by the reservoir so that rotation of said compatible with producing a flame of substantial size for cooking and heating purposes; (2) that the structure shall be sufficiently rugged to stand hard usage without injury; (3) that all of the devices heretofore found necessary for controlling the operation and regulation of such a stove, shall be included in the stove structure notwithstanding its small size; (4) that the parts of the stove shall consist practically in their entirety of punch press parts made of sheet metal, and screw machine parts to lighten the structure and cheapen its production; (5) that projecting portions of the stove which are desirable for stable operation of the same, may be folded or collapsed When not in use to reduce the bulk of the stove to a minimum for transportation; (6) that the fuel reservoir of the stove shall be provided with a-hand-pump serving not only as a means for subjecting the fuel in the reservoir to pressure, but also as a means for storing within it, spare parts of the stove that may be required from time to time; ('7) that in conjunction with providing the necessary height of the burner of thestove above the reservoir thereof, an operating member or wheel shall be disposed practically at the top of the reservoir, for controlling, the operation of the burner of the stove, and that above,

and spaced from the operatingwheel, a combined starting cup and shield is located, which protects the operating wheel from the major portion of the intense'heat of'thebur'ner; (8) the mounting of a central, rotary and vertical column on the reservoir of the stove, which column forms a rigid support for the'burn er and mixing chamber connected therewith, as well as for the-starting cup and shield, and which'column is'rigidly secured to said operating member or wheel, said column 'andthe parts carried thereby constituting a unitary structure mounted for; rotary movement on a fixed tubular support car the column supporting the burner of the stove;

- to the burner and to shut off said fuel flow When desired, the upper portion of said column serving as the vaporizer of the stove when the stove is in operation.

The above and other objects of my invention will more fully appear by reference to the accompanying drawings illustrating a preferred embodiment thereof in which:

Fig. 1 shows the stove in front elevation and in practically full size, in its position of use and supporting a pan to be heated;

Fig. 2 is a plan view of the stove shown in Fig. 1 and to the same scale, with the pan removed;

Fig. 3 is a vertical, sectional view of the parts shown in Fig. 2 taken along the line 3-3 in the latter figure, this view being to an enlarged scale;

Fig. 4 shows in a view similar to Fig. 3, and to a further enlarged scale, the structure of and Figs. 5, 6 and '7 are horizontal, sectional views through the structure shown in Fig. 4 taken, re-1 spectively, along the lines 5-5, 6-6 and 1-1- in Fi 4.

Similar numerals refer to throughout the several views.

opened positions as shown in Fig. 1 to support the stove, or closed positions against the bottom of the reservoir I'U when the stove is not in'use,

for example for carrying or transporting the stove from one place to another. Flat springs 13;;

are provided in connection with the feet H to resiliently hold said feet in their opened and folded known to the art. The reservoir I0 is provided with a hand pump including a pump barrel l4, mounted in the top wall of the reservoir and extending into said reservoir, in which position itis secured by a threaded sleeve I5, so. that byundoing the sleeve, the pump may be removed from the res'ervoir. The pump also includes a similar parts T position-s, as desired, in any manner 3 plunger I6 provided at its outer end with a radially extending handle I! so that by moving the plunger in the pump barrel, desired air pressure may be produced in the reservoir ID on top of the liquid fuel contained therein.

The reservoir I has rigidly connected with the central portion of its top wall, a casing I8 having large apertures I8a in its lower portion for convenient access to the operating member or wheel I9 and starting cup 20, above which apertures the casing continues to just below the top of the burner 2! of the stove, to support the arms 22 provided to in turn support a pan 23 or similar container for cooking purposes. are pivotally connected at 24 with. the upper end of the casing I'8, said arms being provided with locking fingers 22a engaging a locking ring 25 for the open position of the arms to support a pan 23 or other device, at which time the ring 25 which i loosely mounted around the upper end of the casing I8, rests upon lugs I8b extending outwardly from the casing. When the stove is not in use, the ring 25 may be raised on the casing l8, freeing the inner ends of the fingers 22a so that the arms 22 may be turned on their pivotal supports 24 to the position indicated for one of said arms in dotted lines in Fig. 1, for example when it is desired to store the stove or transport it from one location to another. A clearance space 22b is provided in each arm 22 between its pivotal portion and its finger 22a to clear the locking ring 25 when the latter is in its raised or releasing position and the arms 22 are in their folded or collapsed position.

The relation of the feet I I and arms 22 to each other and to the reservoir I0, around the vertical axis of the stove, is more clearly shown in Fi 2. As shown in this figure, the handle I1 is provided with a laterally extending lug I'Ia which, when the plunger I6 is in its lowermost position, may be turned under the wheel l9 by turning the handle I'I and plunger I6, so that the handle H is in a position above the top wall of the reservoir Ill. In this manner, the plunger I of the pump may be held in its innermost position in the pump barrel I4 when the stove is not in use.

As shown in Fig. 3, the casing I8 is provided at its upper edge with a reinforcing wire 24a upon which the arms 22 are pivotally mounted so that said wire constitutes the support for said arms. The locking rin 25 is shown in this figure in its lower or locking position supported by'the lugs i812, and also in dotted lines in its raised or releasin position to enter the clearance spaces 221) above the fingers 22a. The casing is provided with suitable clearance apertures to mount the arms 22 as described, and also to permit the fingers 22a, to pass through the casing to its interior when the arms are in their folded position.

As shown in Fig. 3, the pump barrel I4 is provided with a check valve at its inner end in a manner common to such devices, and the pump plunger I6 is not much smaller in diameter than the bore of the barrel I4, thus providing a substantial space within the plunger for the storing of spare parts of the stove, for example spare valve parts, spare packing, and similar parts small enough to be contained in the pump plunger, the parts bein held therein by screwing into the end of the plunger, a threaded plug Ilia rigidly secured to the handle I'I.

.As shown in Fig. 3, the top wall of the reservoir ID has rigidly secured to it, an internally The arms 22 threaded bushing 26 to which the casing I8 is rigidly secured. A stationary tubular member 2'5 is tightly screwed into the bushing 26, which tubular member is provided with a bore 21a terminating at its upper end in a valve seat 28, said valve seat being at the lower end of a counterbore 22b in the upper end portion of the tubular member 21, which counterbore is of substantially larger diameter than the bore 21a in the lower portion of said tubular member. The member 21 is capable of neither rotary nor axial movement, being rigidly attached to the reservoir i0.

As shown in Fig. 4, the stationary tubular member 21 just above its connection with the bushing 23, is provided with a shoulder 210 above. which the external surface of the tubular member 2'! is cylindrical and of somewhat reduced "diameter to engage a metal ring 29a and a ring 29 of packin material contained in a counterbore 36a in the lower end portion of a rotary tubular member 30. A compression ring 3| is mounted on the member 21 below the ring 29, and is flanged outwardly at its lower end to engage an internally threaded sleeve 32 having threaded engagement with external threads on the lower end of the rotary tubular member 30, so that turningthe threaded sleeve 32 on the rotary member 36, to press the ring 3l1against the ring 29, will pack the outer surface oi the member 21 against the flow of liquid fuelbetween the packing and the adjacent surfaces of the stationary tubular member 21 and of the rotary tubular member 30. The operating member orwheel I9 is rigidly secured to the rotary tubular member 30 so that turning.

said wheel will rotate the tubular member 30 around the vertical axis of the stove and on the upper external surface of the stationary member 21. The upper end portion of the external surface of the stationary member 21 adjacent the ring 29a is provided with an annular keyway for receiving a split ring 33 which is also partly contained in a suitable annular recess in the ring 29a, and which split ring is also in engagement with the upper end of the counterbore 36a in r the rotary tubular member 3i] (see Fig. '7) The split ring :33 thus restrains the rotary tubular member 30 against axial movement relatively to the stationary member 21, without interfering with rotary movement of the tubular member 30 on the member .21.

The counterbore 21b in the stationary member- 21 is internally threaded to engage corresponding external threads on the lower end portion of a' valve member 34 arranged at its lower end to engage the valve seat 28 so that movement upwardly of the valve member 34 will open the valve and movement downwardly of the valve member will close'the valve. The upper exterior portion of the valve member 34 is fiat-sided, for example hexagonal, at Ma and in axial, sliding engagement with a bore in the upper end of the rotary tubular memberfll of similar shape (see Fig. 5), as a result of which rotary movement of the tubular member 30 also imparts rotary movement to the valve member 34, and the axial movement of the valve member 34 resulting from its rotary movement in engagement with the internal screw threads in the upper end of the stationary member 21, is readilypermitted, relatively to the rotary tubular member 30.

As described below, ;the bore 21a is incom munication with the fuel in the reservoir l0 and opening and closingthe valve member 34 controls the flow of the liquid fuel to the burner of, the stove. The valve -member34 is providedat:

its outer surface with a longitudinal groove 34b through which the liquid fuel may flow from the valve seat 28 upwardly in its passage to the burner. (See Fig. 6 and also Figs. 5 and 7.)

. The lower end portion of the valve member; 34 is provided with a central axial bore to receive the upper end of a valve rod 35, for a purpose below described. The upper end of the rod 35 extends across a transverse bore 34c in which, after it is mounted in the valve member 34, the upper end portion of the rod 35 is indented as shown at 35a. by a suitable tool, as a convenient means for securing the rod 35 to the valve member 34. After this is done, the bore 340 is preferably filled with suitable compound to prevent seepage of the liquid fuel around the valve mem-' ber 34 when the valve is closed.

Still referring to Fig. 4, the upper end of the valve member 34 is provided with a threaded bore 34d for engagement with the lower threaded end of an upwardly extending. rod 36 which passes centrally through a screen 31 and carries at its upper end a needle 38 for entering the aperture 39a in a nozzle 39 when the valve member 34 is raised to its uppermost position, so that when de sired, the aperture 39a may be cleaned of foreign matter that may accumulate and interfere with the proper operation of the nozzle 39. The screen 31 is cylindrical and is housed in a second rotary tubular member 40 secured at its lower end to the upper end of the rotary tubular member 30 by an internally threaded sleeve 4| engaging corresponding external threads on the upper end portion of the rotary tubular member 30. The starting cup is rigidly secured to the upper end of the sleeve 4| as illustrated in Fig. 4. The upper end of the rotary tubular member 40 is externally threaded to engage corresponding internal threads in a sleeve 42 on which the burner 2| is mounted. As below described, the burner 2| is shaped to also form the mixing chamber of the stove, and is provided with an air valve 43 engaging the inner surface of the lower portion of the burner structure 2| with a sliding fit, the lower edge of the burner 2| and the lower edge of theair valve 43 being contained with a sliding fit in a groove in the upper external surface of the sleeve 42, for

example by forcing the upper end 42a of said sleeve over against the lower portion of the air valve 43, the fit of the parts 2| and 43 in the groove soformed, being such as to permit angular movement of the air valve 43 relatively to the burner structure 2|. The nozzle 39 isexternally threaded and supported byengaging corresponding internal threads in the upper end of the rotary tubular member 40.

From the above, and as shown in Figure 3, it will appear that the rotary tubular member and the rotary tubular member 40 in their assembled relation, together constitute a central, vertical, tubular column of the stove, to which column the operating member or wheel IS, the cup and shield 20 and the burner 2| are secured, which column is rotary as a unitary structure relatively to the reservoir l0, when the operating member or wheel I9 is turned to operate the valve member 34; it will also appear that said column extends upwardly from and is supported by the reservoir Ill, since said column is mounted for rotary movement on the stationary, tubular supporting member 21 which is rigidly secured to and extends above the reservoir l0, and it is also apparent that the split ring 33 restrains saidunitary column structure against axial movement relatively to said stationary supporting member 21, as

well as relatively to the reservoir l0.

As more clearly shown in Fig. 3, the fixed member 21 has screwed into the lower end of its bore 21a, a tube 44 having a bore somewhat larger in diameter than the diameter of the rod 35, which tube is imperforate and extends nearly to the bottom of the reservoir It]. Around the tube 44 a second tube 45 is disposed having a bore of slightly larger diameter than the outside diameter of the tube 44, the upper end of the tube 45 being contracted so that it engages the upper portion of the tube 44 by which said tube 45 is supported from the tube 44 in concentric relation therewith. The tube 45 has secured thereto at its lower end. a cap member 45 extending slightly below the lower ends of the tubes 44 and 45 and providing a compartment 46a at the lower ends of said tubes 44 and 45 connecting the space between the tubes 44 and 45 and the space between the tube 44 and the rod 35. The lower end of the cap member 46 is provided with an aperture in which the lower end of the rod is disposed, for the closed condition of the valve member 34, said aperture being slightly larger than the diameter of the lower end of the rod 35 to permit fuel flow in restricted amount from the reservoir I0 into the compartment 460,, when the lower end of the rod 35 is in said aperture. The upper end portion of the tube 45 is provided with apertures 45a above the uppermost fuel level in the reservoir l0 and communicating with the space between the tubes 44 and 45. As a result of this construction, when pressure has been developed on the air in reservoir I0 above the liquid fuel therein by operation of the pump plunger l6, and it is desired to start the operation of the stove, the valve member 34 is raised slightly from its valve seat 28, for which condition the lower end of the rod 35 is still in the aperture in the end of the cap member 46. This causes fuel flow upwardly around the rod 35 in the tube 44, of restricted amount, to and through the nozzle 39, which fuel may be permitted to flow and drip into the starting cup 20 by holding the operators hand over the burner 2|, until a desired amount has been there collected, and then the fuel so collected in said cup is lighted and the preheating of the vaporizer or generator begins. In a very short time the generator 40 is sufficiently heated to vaporize the fuel passing upwardly through the screen 31, and the fuel is ignited at the burner 2| from the fuel burning in the cup 20. The heating action continues until the generator and burner have become sufiiciently heated to vaporize a larger volume of fuel, and

then the wheel H! is further turned to separate the valve member 34 to a greater degree from the valve seat 28, which draws the rod 35 upwardly from the aperture in the cap and permits free flow of the liquid fuel into the cap and up through the tube 44 around the rod 35, which is the running condition of the stove. The provision for producing a lean mixture of fuel during the starting condition as described, is found to be advantageous in initially heating the generator 40 and burner 2|. During said preheating, air flows through the apertures 45a and downwardly between the tubes 44 and 45 and mixes with the limited amount of fuel flow into the compartment 46a, because of the small clearance between the rod 35 and the aperture in the cap member 45, producing the lean condition of mixture referred to for starting purposes. When the operating member or wheel I 9 is turned to establish the running condition of the rod 35 relatively to the cap member 46, and or the valve mem er 34 relatively to its seat 28, the needle is still below the nozzle aperture 39a, so that it does not in any Way interfere with the discharge of the vaporized fuel from the nozzle. As shown in Fig. 3, the shell of the burner 21 and the air valve 43 contain regis tering openings 2Ia and 43a so that by turning the air valve 43 relatively to the burner 2|, said air'openings may be increased or decreased in effective size permitting air flow to the vaporized fuel delivered by the nozzle 39, to establish proper combustion of the fuel, the space Within the air valve 43, serving as the mixing chamber of the stove. The burner 2| supports in its upper portion, a baffle 41 having a plurality of radial arms 47a, extending through apertures therefor in the wall of the burner 2|. The bafile is of substantially the same shape and smaller than the corresponding portion of the burner, leaving an annular space between the bafile and the burner for the flow of fuel mixture to the burner flame. The baffle 41 is centrally disposed in the burner 21 and said burner is substantially coaxial with the nozzle 39, so that the vapor stream from the nozzle is projected against the baflie and this materially aids in effecting intimate mixture of the fuel vapor with the air admitted into the mixing chamber through the air valve 43.

The openings 2 la and 430, are placed in angular alignment with the fingers 22a, so that in folding the arms 22, said fingers may enter the burner through said openings.

From the above, it will be noted that the invention provides a novel construction of central supporting column, by which all of the partsof and carried by said column are mounted for retary movement by means of an operating member or wheel rigidly secured to said column, and relatively to a short vertical and column supporting member rigidly secured to the reservoir l'fl, and that said rotary column has rigidly secured thereto the starting cup and shield structure of the device, and that excepting for purposes of air adjustment, the burner 2! and air valve 43,'as well as the baflle 41, are also carried by said column as a unitary structure and rotate with said column. This arrangement obviates difficulties in construction that would otherwise be present if it were attempted to provide a non-rotary and non-movable central column in connection with which only the valve itself were rotary and axially movable. It will also be noted that although the parts referred to as mounted on the rotary column are rotary with said column in adjustingthe fiowof the liquid fuel, all of these p'artsare surrounded by a casing 18 which is rigidly secured to the reservoir l and has no movement relatively to the reservoir, the casing serving as a protection for the rotary parts, and at the same time providing a stationary support for the arms- 22. It will also be observed that the apertures in the lower part of the casing provide ready access to the starting-cup Zlland to the operating member or wheel [9 so that said wheel -'may be rotated as required to adjust the flow of the liquid fuel. A further important advantageof thec'onstruction is that most if not all of the parts may be made from sheet metal by punch pressoper'ations or from metal bars by screw machine operations, which operations are recognized as among the cheapest in connection with the manu-'- facture of any device. It will also be observed that although the stove is'of very small size, the structure described provides for all of the requirements of effectively burning liquid fuel 'andwith' r any size flame that may reasonably be required. The stove described is intended for operation with relatively light liquid fuel such as gasoline, although I do not limit myself to the use of such fuel as other liquid fuels susceptible of being burned with devicesof the kind-described, may be used with the stove, if preferred.

It will also be noted that the described construction of the central, rotary column of the stove, simplifies the assembly of the stove, as well as facilitating disassembling the parts for cleaning and renewal, as may be desired.

While I have shown my invention in the particular embodiment above described, it will be understood that I do not limit myself theretoa's I may employ equivalents thereof without departing from the scope of the appended claims.

Having thus described my invention, what I claim is:

v '1. A portable stove for burning liquid fuel, including in combination a fuel reservoir, two 00"- operating parts comprising a tubular supporting member rigidly secured to and extending above said reservoir and a tubular column carried by and extending upwardly from said supporting member and capable of rotary movement relatively to said supporting member, an operating member secured to said column, a burner carried by said column, said two cooperating parts having coaxial cylindrical surfaces one around the other, one of said two cooperating parts having an annular recess in its said cylindrical surface, annular packing material in said recess for engaging the said cylindrical surface of the other of said two cooperating parts, said recess having opposed end walls adjustably exerting axial pressures on said packing material, said end Walls for any said pressure adjustment having fixed relation to and being carried by said recessed cooper ating part and disposed at opposite ends of said packing material, whereby for any axially compressed condition of said packing material opposed and balanced axial pressures are exerted on said recessed cooperating part independently of said other cooperating part and said-packing material is pressed against said other cooperating part thereby forming a seal, said two cooperating parts having registering annular keyways, a

key member in said keyways restraining said two cooperating parts against relative axial movement independently of said packing material and of the axial pressures thereon, and a shut-off valve member in said column and having axial movement controlled by'rotary movement of said column.

2. A portable stove for burning liquid'fuel, including in combinationa f-u'el reservoir, two cooperating parts comprising a tubular supporting member rigidly secured to and extending above said'reservoir and a tubular central column carried by said tubular supporting member and extending upwardly therefrom, said column :having bearing engagement with said'tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operatingmember secured to said column, a burner carried by said column, a key member and cooperating "annular keyway carried by said two cooperating parts and restraining said column against axial movement relatively '-'to said tubiilar supporting member, a "burnerregulating and shut-off valve member in said column having threaded engagement with one of said two cooperating parts and having flat surface slidingengagement axiallyof saia commn with the other one of said two cooperating parts restraining said valve member from angular movement relatively to said other one of said two cooperating parts and permitting axial movement of said valve member relatively to said tubular supporting member, and packing means between said two cooperating parts and including a ring of packing material, one of said two parts having a cylindrical recess containing said packing ring, said recess having two opposed end walls both of which are supported by the one of said two parts containing said recess and disposed at opposite ends of said packing ring, one of said end walls being axially'movable on its support and thereby exerting axial pressure on said ring of packing material and producing a corresponding opposing axial pressure on said packing material by the other of said end walls, whereby compressing said packing material axially producesopposed pressures axially on the one of said two parts containing said recess. independently of the other of said. two parts and presses said packing against said other of said parts thereby forming a seal.

3. A portable stove for burning liquid fuel, including in combination a fuel reservoir, two cooperating parts comprising a tubular supporting member rigidly secured to, and'extending above said reservoir. and a tubular central column carried by said tubular supporting member and extending upwardly therefrom said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relativelyvto said tubular supporting member, an Operating member secured to said column, aflburner carried by said column, a key member and cooperating annular keyway carried by said two cooperating parts and restraining said column against axial movement relatively to said. tubular supporting member, a burner-regulating and shut-01f valve member in said column having threaded engagement with one of said two cooperating parts and having flat surface sliding engagement axiallyof Y said column with the other one of said two cooperating parts restraining said valve member ,from angular movement rela tively to said other one of said two cooperating parts and permitting axial movement ofsaid valve member relatively to said tubulansupporting member, packing means between said two cooperating parts and including a ring of' packing material, one of said two parts having a cylindrical recess containing said packing ring, said recess .having two opposed end'walls, both of which'aresupported bythe one of said two parts containing said recess and disposed at opposite ends of said packing ring, one of said end walls being axially movable on its support and thereby exerting axial pressureon said ring" of "packing material and producing, a corresponding opposing axial pressure on" said packing' material by' 1311601311?! of said end walls,'whereby compressing said packing material axially produces opposed pressures axially onthe one of said two parts containing said recess independently of the oth'er of said two parts and pressessaid'pa'cking against said other'of said parts thereby forminga seal, an apertured fuel nozzle, supported by" the upper end of said column', arodjsecuredto and "extending upwardly from said valve member,and a pricker needle 'carriedby theupper end of said rod for entry, into the nozzle fapert urawhen said valve'is in its upperposition,

' 4. Aportabl'e stove for bui'ningliquid' fuel; in-

eluding in combination a fuel reservoir, two 00- operating parts comprising a tubular supporting member rigidly secured to and extending above said reservoir and a tubular central column carried by said tubular supporting member and extending upwardly therefrom, said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a key member and cooperating annular keyway carried by said two cooperating parts and restraining said column against axial movement relatively to said tubular supporting member, a burner-regulating and shut-01f valve member in said column having a valve surface at its lower end and having threaded engagement with said tubular supportingimember and having at its upper end portion afiat-sided longitudinal outer surface in axially" sliding engagement with a similarly shaped inner surface of said column, said tubular supporting member having a valve seat for cooperation with said valve surface, and packing means between said two cooperating parts and including a ring of packing material, one of said two parts having a cylindrical recess containing said packing ring, said recess having ,two opposed end walls both of which are supported by the one of said two parts containing said recess and disposed at opposite ends of said packing ring, one of said end walls being axially movable on its support andjthereby exerting axial pressure on said ringof packing material and producing, a corresponding opposing axial pressure on said packing material by the other of said end walls, whereby compressing said packing material axially produces opposed pressures axially on the'one of said'two parts containing said recess independentlyof the other oi said two parts and presses said packing against said other of said parts thereby forming a seal. t I

5. A portable stove for burning liquid fuel, including in combination a fuel reservoir, a stationary support extending from said reservoir, a tubular column mounted vertically upon said stationary support for rotary movement relatively to said reservoir, 2; key member and cooperating keyway carried by said stationary support and said column and restraining said column against axial movement relativelyv to said reservoir, a burner supported by said column, and fuel-controlling valve mechanism in said column including an axially movable valve member and a stationary valve seat below said valve member, there being operating connection between said column and said valve member, said'stationary support and said column having coaxial cylindrical surfaces, said cylindrical surface of said column being outside of and around said cylindrical surface of said stationary support, said cylindrical surfaceof said column having an annular recess therein, annular packing material in said recess for engaging said cylindrical surface of said stationary support, said recess having opposed end walls adjustably exerting axial pressures onsaid packing material, said end walls for any said pressure adjustment having fixed relation to and both being carried by said column and disposedat' opposite ends of said packing material,'whereby'forany axially compressed condition of said packing material oppQsed-" and balanced axial pressures are exerted brisaidcolumn"independently "of said stationary meagre 11 support and said packing material is pressed against said stationary support thereby forming a seal.

6. A portable stove for burning liquid fuel, including in combination a fuel reservoir, a stationary member carried by said reservoir, a tubular column mounted vertically on said stationary member for rotary movement relatively thereto, a key member and cooperating keyway carried by said stationary member and said column and restraining said column against axial movement relatively to said stationary member, a burner supported by said column, and a valve member in said column for controlling fuel flow and having threaded engagement with said stationary member and having also non-rotary and axially sliding engagement with said column, whereby rotary movement of said column imparts rotary movement and also axial movement vertically to said valve member, thereby moving said valve member to its open and closed positions as desired, said stationary member and said column having coaxial cylindrical surfaces one around the other, the outer one radially of said cylindrical surfaces having an annular recess therein, annular packing material in said recess for engaging the inner one of said cylindrical surfaces, said recess having opposed end walls adjustably exerting axial pressures on said packing material, said end walls for any said pressure adjustment having fixed relation to and both being carried by said recessed part and disposed at opposite ends of said packing material, whereby for any axially compressed condition of said packing material opposed and balanced axial pressures are exerted on said recessed part independently of the part having said inner cylindrical surface and said packing material is pressed against said inner cylindrical surface thereby forming a seal.

7. A portable stove for burning liquid fuel, in-

cluding in combination a fuel reservoir, a stationary member carried by said reservoir, a tubular column mounted vertically on said stationary member for rotary movement relatively to said reservoir, a key member and cooperating keyway carried by said stationary member and said col,- umn and restraining said column against axial movement relatively to said reservoir, a burner supported by said column, fuel-controlling valve mechanism in said column including a movable valve member and a stationary valve seat below said member, said valve member having a valve surface at its lower end and having fiat-surface engagement with said column permitting vertical axial movement of said valve member and having threaded engagement with said stationary member permitting angular movement of said valve member, said stationary member and said column having coaxial cylindrical surfaces, said cylindrical surface of said column being outside of and around said cylindrical surface of said stationary member, said cylindrical surface of said column having an annular recess therein, annular packing material in said recess for engaging said member and said packing material is pressed against said stationary member thereby forming a seal.

8. A portable stove for burning liquid fuel, including in combination a fuel reservoir, two cooperating parts comprising a tubular supporting member rigidly secured to and extending above said reservoir and a tubular central colurrm carried by said tubular supporting member and extending upwardly therefrom, said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a key member and cooperating annular keyway carried by said two cooperating parts and restraining said column against axial movement relatively to said tubular supporting member, a valve member in said column having threaded engagement with one of said two cooperating parts and having flat surface sliding engagement axially of said column with the other one of said two cooperating parts restraining said valve member from angular movement relatively to said other one of said two cooperating parts and permitting axial movement of said valve member relatively to said tubular supporting member, said tubular supporting member having a cylindrical external surface at its upper portion, and said column having a counterbore around said cylindrical surface, upper and lower metal rings in said counterbore, packing material in said counterbore between said metal rings and engaging said counterbore and said cylindrical external surface, and means for compressing said packing material between said metal rings and pressing the same against said column and against said tubular supporting member.

9. A portable stove for burning liquid fuel, in cluding in combination a fuel reservoir, two cooperating parts comprising a tubular supporting member rigidly secured to and extending above said reservoir and a tubular central column car,- ried by said tubular supporting member and extending upwardly therefrom, said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a valve member in said column having threaded engagement with one of said two cooperating parts and having flat surface sliding engagement axially of said column with the other one of said two cooperating parts restraining said valve member from an ular movement relatively to said other one of said two cooperating parts and permitting axial movement of said valve member relatively to said tubular supporting member, said tubular supporting member havi g a cylindrical external surface at, its upper portion, and said column having a counterbore around said cylindrical surface, upper and lower metal rings in said counterbore, packing material in said counterbore between said metal rings and engaging said counterbore and said cylindrical external surface, means for compressing said packing material between said metal rings and pressing the same against said column and against said tubular supporting member, said upper metal ring having a first annular keyway in its inner surface and said tubular sup.- porting member having a second annular keyway in its outer surface registering with said first an u a ey a and a k y mem e com is a 13 split" ring in said annular keyways and restraining said column against axial movement relatively to said tubular supporting member.

10. A portable stove for burning liquid fuel, including in combination a fuel reservoir, two cooperating parts comprising a tubular supporting member rigidly secured to and extending above said reservoir and a tubular central column carried by said tubular supporting member and extending upwardly therefrom, said column hav-- ing bearing engagement with said tubular supporting member permitting rotar movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a key member and cooperating annular keyway carried by said two cooperating parts and restraining said column against axial movement relatively to said tubular supporting member, a valve member in said column having threaded engagement with one of said two cooperating parts and having flat surface sliding engagement axially of said column with the other one of said two cooperating parts restraining said valve member from angular movement relatively to said other one of said two cooperating parts and permitting axial movement of said valve member relatively to said tubular supporting member, said tubular supporting member having a cylindrical external surface at its upper portion, and said column having a counterbore around said cylindrical surface, upper and lower metal rings in said counterbore, packing material in said counterbore between said metal rings and engaging said counterbore and said cylindrical external surface, and a threaded sleeve on the lower end of said column for compressing said packing material between said metal rings and pressing the same against said column and against said tubular supporting member.

11. A portable stove for burning liquid fuel, including in combination a fuel reservoir, two cooperating parts comprising a tubular supporting member rigidly secured to and extending above said reservoir and a tubular central column carried by said tubular supporting member and extending upwardly therefrom, said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a valve member in said column having threaded engagement with one of said two cooperating parts and having flat surface sliding engagement axially of said column with the other one of said two cooperating parts restraining said valve member from angular movement relatively to said other one of said two cooperating parts and permitting axial movement of said valve member relatively to said tubular supporting member, said tubular supporting member having a cylindrical external surface at its upper portion, and said column having a counterbore around said cylindrical surface, upper and lower metal rings in said counterbore, packing material in said counterbore between said metal rings and engaging said counterbore and said cylindrical external surface, a threaded sleeve on the lower end of said column for compressing said packing material between said metal rings and pressing the same against said column and against said tubular supporting member, said upper metal ring having a first annular keyway in its inner surface and said tubular supporting 14 member having a second annular keyway in" its outer surface registering with said first annular keyway, and a key member comprising a split ring in said annular keyways and restraining said column against axial movement relatively to said tubular supporting member.

12. A portable stove for burning liquid fuel, including in combination a fuel reservoir, a tubular supporting member rigidly secured to and extending above said reservoir, a tubular central column carried by said tubular supporting member and extending upwardly therefrom, said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a key member and cooperating annular keyway carried by said supporting member and said column and restraining said column against axial movement relatively to said tubular supporting member, a valve member in said column having threaded engagement with said supporting member and having flat surface axially sliding engagement with said column restraining said valve member from angular movement relatively to said column and permitting axial movement of said valve member relatively to said tubular supporting member, said tubular supporting member having a cylindrical external surface at its upper portion, and said column having a counterbore around said cylindrical surface, upper and lower metal rings in said counterbore, packing material in said counterbore between said metal rings and engaging said counterbore and said cylindrical external surface, and means for compressing said packing material between said metal rings and pressing the same against said column and against said tubular supporting member.

13. A portable stove for burning liquid fuel, including in combination a fuel reservoir, a tubular supporting member rigidly secured to and extending above said reservoir, a tubular central column carried by said tubular supporting member and extending upwardly therefrom, said column having bearing engagement with said tubular supporting member permitting rotary movement of said column relatively to said tubular supporting member, an operating member secured to said column, a burner carried by said column, a valve member in said column having threaded engagement with said supporting member and having fiat surface axially sliding engagement with said column restraining said valve member from angular movement relatively to said column and permitting axial movement of said valve member relatively to said tubular supporting member, said tubular supporting member having a cylindrical external surface at its upper portion, and said column having a counterbore around said cylindrical surface, upper and lower metal rings in said counterbore, packing material in said counterbore be tween said metal rings and engaging said counterbore and said cyylindrical external surface, means for compressing said packing material between said metal rings and pressing the same against said column and against said tubular supporting member, said upper metal ring having a first annular keyway in its inner surface and said tubular supporting member having a second annular keyway in its outer surface registering with said first annular keyway, and a key member comprising a split ring in said annular keyways and restraining said column against axial movemen; relatively to 5419195111211 supporting member.

CARL BRAMMING,

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

UNITED STATES PATENTS Number Name Date 10 Jeffrey et al. Mar. 7, 1876 Thorne Dec. 4, 1877 Shedlock May 2, 1893 Hoppe Aug. 29, 1899 Newbold Feb. 25, 1902 15 Sone Oct. 6, 1908 Savage et a1. Apr. 12, 1910 Gehring et a1 Nov. 11, 1913 Fuller May 14, 1918 Number

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