US2450025A - Gasoline field stove - Google Patents

Description

Sept. 28, 1948. L. J. STEIN GAS-CLINE FIELD STOVE.

Filed Jan. 4, 1945 1N VEN TOR.

#Troyen/5y Patented Sept. 28, 1948 GAsoLlNE FIELD s'rovE Leander J. Stein, United States Army, Sheboygan, Wis.

Application January 4, 1945, SerialNo. 571,343

e 3 claims. (01.1585-63) y (Granted under the act of March 3, 1883,l as

amended April 30, 1928; 370 O, G. 757) The invention described herein, if patented, may be manufactured and used by or' for the Goverment for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to stoves and, more particularly, to vapor burning stoves employing a gravity, fuel-feeding system wherein provision is made for automatically utilizing excess vapor generated therein, and returning the sameto the fuel supply. c l

In vapor burning stoves of the gravity fuel feed type, as at present employed, it is necessary to provide some means for disposing of the excess vapor formed in the fuel pipe in order to prevent its deleterious action upon .the operation of the stove. If no means of "disposal of this vapor is provided, the flame of vthe burners will be found to pulsate, or ebb and ow, due to the return of the excess vapor to' the fuel supply through the fuel pipe. This undesirable effect of excess vapor is especially evident in stoves provided with vapor generators for preheating the fuel before it reaches .the burners, in which case the rapidly formed vapor builds up a back-pressure inthe fuel pipe, and causes La pulsation of the flame so great as to seriously affect the efliciency of the stove. Y

Heretofore, attempts have been made to overcome this disadvantage in stoves of this typevby extending the fuel pipe beyond the burners to permit excess vapor to pass off without building up undesirable back-pressure therein, o-r by applying pressure to the fuel pipe suiiicientrto overcome any back-pressure built up by the formation of excess vapor therein. These vexpedieuts have not, however, proved tobe entirely satisfactory in a stove of the' type here contemplated, because of the unnecessary waste of fuel when using an extension of the fuel pipe: and because, ofthe necessity of providing a pumporv other `means for applying pressure to .the fuel when such means is used for overcoming the pressure of the excess vapor.

It is an object of the invention to provide -a vapor burningstove having `a vapor 'generating system wherein the above disadvantages are eliminated by the provision of means for the advantageous disposal of excess vapor formed.

A further object of the invention is the provision of a vapor burning stovel capable of `automatic operation without the necessity for the use of any pump or other agency outside of the stove itself for building up pressure in the fuelfsupply thereof.

Further objects of the invention are the p'rovil-y `sion of a stove of the kind named, of simple designI and rugged structure, capable of being quickly a-nd easily assembled for operation, lor dismantled for transportation,y and when so dismantled, occupying a minimum of storage space. A still further object is the provision of a gasoline stove which is easily cleaned and maintained in elhcient operation.

The above and other lobjects of the invention are obtained by the provision of a gasoline stove ofthe gravity fuel feed type, comprising'essenJ tially a fuel tank, a vapor generator or expansion chamber and a bur-ner, having a return pipe'ex` tending from the generator to the top of the fuel tank for conducting excess vapor to the space above the fuel therein. l i

The invention will be more fully understood-:by referring tothe embodiment thereof `described'in the following specification and illustrated in the Vaccompanying drawings wherein:

' Figure 1 is a perspective view of the stovewith the fuel tank attached thereto, and Figuref2- is an enlarged, sectional View taken along thefline 2 2 of Figure ijiooking in the direction indi-l cated by the arrows, and showing the structure of one of the burner-s and the relation of the llame shield to the jet hole thereof.' Figure 3 is anwenlarged side elevational view of one of the supports oftheA stove, showing the semi-circular notch therein for the Iaccommodation ofthe burner section.

Referringv to the drawings, the gasoline stove consists of a unitv formed of a tube of a suitable material, preferably iron pipe, bent upon itself into a U-shape, as shown in Figure 1,'Ito forman elongated burner section I and an` elongated vapor generator section 2 extending parallelto', spaced from, and situated above the burner section I. Any number of burners may be provided, each consisting of a small `jet hole 3 in lthe burner sec- 'tion I, above which is positioned a flame guard 4 formed of a short section of pipe, of larger diameter than that of the burner section, supported by iron plates 5 welded thereto and to .the burner section I. The burners are arranged at suitable, uniformly spaced intervals .along the length-of the burner section I.

The unit is horizontally supported upon the standards 6 of T-shape, as shown in Figure 2, having ythe feet 1 and the uprights 8 formed of angle iron. The uprights 8 are provided with semi-circular slots 9 spaced above the feet 'linto which the burner section I is .adapted to be re# ceived, while the generator section 2 rests upon the tops of the uprights 8 along the edges thereof. In this manner, the upper ends of the upright standards 8 provide underneath supports for the generator tube, and the slotted vertical edges prevent the .generator tube and ,burner .tube from sliding off laterally; and generator and burner tubes I, 2 can be disengaged from the upright standards 8 by lifting.

A plug IU is p-rovided in the end of the burner section I, affording ready access to Ithe inside thereof for the purpose of cleaning the same.

A section of pipe II of smaller diameter than that of the generator 2, and preferably of copper, is coupled to the end thereof and is provided `with a screw-threaded, pipe fitting I2. A .second screw-threaded pipe fitting I4 is provided on the end of the generator 2. A gasoline well i is provided beneath the generator 12 near .the fueil receiving end thereof, for the purpose of preheating `.the generator `upon starting operation of the stove. The gasoline vwelljis in the form of a small, shallow, tray-like structure secured to the genchater `'by short supports.

.A suel supply tank I5 is provided, having a fillingopening in its top, closed by suitable icap It. A pipe ntting `I'I is provided on the tank. at a Point near the top thereof, and a needle valve i8 for controlling the ow of the fuel vis :secured to the :tank mear its bottom.

A fuel feed pipe I9 extends :from :the gneed-le vulve I8 to the pipe fitting IZ on the 'pipe I;I whereby fuel is permitted to flow in an amount controlled by the needle valve` iii, from the tank tothe generator. ,A vaporrretum :pipe 2t extends z from `.tl-1e pipe fitting IA on the generator section 2 to the pipe tting Il near the top Iof the -uel tank 1.5.

'It vwill be noted that the burner tube -I is later- Ially below the generator or expansion chamber 2 and the vertical axes of burner jets 3 are not directly below generator or expansion chamber 2, but are slightly to one side thereof, so that the burner Vjets are in heat exchange relation with the chamber 2, but the name will not play directly on the latter, thus preventing the metal of the from being `rapidly burned out.

The stove ,is most conveniently set in the ground in a trench, .as .seen in Figure l, of .such depth as to permit the generator or expansion chamber 2 to lie below :the level of the ground, and a suflicient space allowed between the burners and .the object being heated for enicient oper-ation :of the name. The stove may also be placed for use .directly on the ground, or other support, and provided with `a suitable shield for protecting the ame from the wind, The fuel tank is best located at some point o-f higher eleva-,tion than the generator or .expansion ychamber so that the fuel will be fed to the stove by gravity, and the ,stove is .advantageously placed so that the end thereof nearest the fuel tank is slightly higher than the end remote therefrom., thus permitting liti-uid `fuel to flow into the expansion chamber and promoting vaporzation.

In the operation of the stove, a gasoline well I3 is filled with gasoline which i-s then ignited in .order to preheat the generator section 2. When the generator section has been thus sufficiently heated, the needle valve I8 4is opened, permitting gasoline to ilow to the generator and thence, after vaporization, to the burner section I and out through the yjet holes 3 where it is ignited. Subsequent heating ,of the generator vsection 2 by the burners .causes the development or a copious supply of gasoline vapor with a consequent increase in pressure inside the burner section and generator. If this pressure becomes greater than the burners can accommodate, there is a tendency for excess vapor to iiow back through the fuel pipe into the fuel tank. The provision of the vapor return pipe '.20 permits this excess vapor to ow into the top of the fuel tank I5 where it ac- -curnulates in the space above the fuel therein. The vapor thus returned to the fuel tanks exerts pressure :upon the fuel contained therein, making it unnecessary to employ a hand pump or other mechanism for applying pressure to the fuel. The returned vapor is also condensed to liquid gasoline, so that fuel is saved which otherwise would .be lost in the operation of a stove not provided with such vapor return means, and thus the economy resulting from the employment of .the invention `.is .apparent When it becomes necessary to clean the interior of the stove, the plug t0 is removed from the end of the `'bur-ner 'section `I and -a round, .steel :brush inserted therein. The jet holes 3 can be easily cleaned by the use K.of `any .convenient obrect such ,y as piece of .wire of .suitable diameter.

To dismantle the stove, it is only necessary to disengage lthe fuel land .vapor return .pipes :I9 .and 2n which may, ,for convenience, .be flexible, and remove .the standards 5. The .entire equipment can then be packed into a very small space for transportation. It will thus be .apparent that the invention provides an inexpensive and ruggedly constructed stove capable of withstanding the rough usage to which .such .equipment is likely to ,be subjected, and Ahaving an automaticallyoperatlng vapor control and return system which effects a ,substantial economy of fue] Aand increased efficiency in operation.

,Having thus clearly described the invention,

,` what is claimed and desired to secure by ,Letters Patent is:

1. A demountable Vapor-burner stove compris- .ing an elongated horizontal burner tube, an elongated horizontal generator tube laterally above and communicating with said burner tube, at least one burner jet in .said yburner tube in heat exchange relation to said generator tube, the vertical axis of said jet being lateral of said generator tube, va plurality of upright standards, the upper end of `each of said standards providing underneath support for seating said generator tube, and the vertical edge of .each of said standards having means for holding said tubes against lateral displacement, said tubes being disengageable from said standards by lifting.

2. A demountable vapor-burner stove comprising an elongated horizontal burner tube, an elongated horizontal generator tube laterally above -and communicating with said burner tube, at least one burner jet in said burner tube in heat exchange relation to said generator tube, the vertical axis of said 'jet being lateral of said generator tube, a plurality of upright standards, the upper end of each of said standards providing underneath suport for seating said generator tube, and the vertical edge of e-ach of said standards being slotted for engaging said burner tube and holding said tubes .against lateral displacement, said tubes being disengageable from said standards by lifting.

3. A demountable eld stove comprising in combination a closed fuel tank; an elongated horizontal generator tube communicating with said fuel tank; an elongated horizontal burner tube laterally below and communicating with said generator tube; a plurality of spaced lvertical burner jets in said burner tube in heat exchange relation to said generator tube, the vertical axes of said jets being lateral of said generator tube; a vapor return pipe leading from s-aid generator tube into said fuel tank at a point above the liquid level in said fuel tank, whereby the contents of said tank are subjected to pressure from vapor returned through said pipe; and a plurality of spaced upright standards, the upper end of each of said standards providing underneath support for seating said generator tube, and the vertical edge of each Iof said standards having means for holding said tubes against lateral displacement, said tubes being disengageable from said standards by lifting.

LEAzNDER J. STEIN.

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

Number 20 Number 6 UNITED STATES PATENTS Name Date Bean Sept. 5, 1882 Patterson May 22, 1888 Ferguson Feb. 6, 1894 Poll Deo. 7, 1897 Denning Aug. 4, 1903 Imhoff Dec. 28, 1909 Hunziker Jan. 21, 19-13 Warner et al Oct. 28, 1913 Dorman Mar. 13, 19-1'7 Boyd Apr. 17, 1917 Gipson May 1, 1917 Phillips June 19, 19-1'1 Brown Oct. 8, 1918 Brown July 20, 1920 Pope Mar. 26, 1940 FOREIGN PATENTS Country Date Great Britain 1897 Germany Jan. 24, 1925

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