US2482797A - Pressureless gasoline stove - Google Patents

Description

Sept. 1949- Q E. D. QL NNELL. ET AL 2,482,797

PRESSURELESS GASOLINE STOVE 2 Sheets-Sheet 1 Filed May 9, 1944 Ear/e Patented Sept. 27, 1949 EarleDQQuinnell; 4 United States Barracks and Chester L. Eppley,

spring ,'--Pa; j

Army; CarliSle i -Munt Holly-- Appl tati M yaisnrserial No. 534,736 V ;7 claim (01912 -45): v (Granted under thez act of March. 3,, 1883, ,as

The invention :2 described; herein; it patented:=

mayhemanufacturedanclwusedzby error the Govrs" ernment: for governmental 'purposes-,. withoutthe payment-to of-any royalty thereon.

This invention relates;: to an improved portable gasoline stove either single burnerrtyp designed;

for-use especially byindividualsoldiers and small amended April sfl; 1928;. 37,0 0... .751).

groups; of men s in" field; operations-1 of, the

It is an obiectof this invention to provide'a pressurelessgasohne stove having as simple; a

construction-as possible, and ;:having; no parts,

which require. replacementqeven; after; extended" periodsv of. use; 4

It is the:.fur-ther-= object or this invention toprovide a stove capable ,of burningout completc-1y-v a single charge of gasoline fOIfithQ purposeof; heating; food.- 'or other materials: placed; ontop. of the store which: is, provided; with. a. supporting:

rack-tor the purpose:

Otherobjects of .the invention will: appear from;

a consideration:-,of the specification andthe.

company-mg drawingsinwhich-r,

Figure 1' is; a perspective view of" stove, 7 I Figurev 2, is a. perspectiveview of the burner the. assembledcap and I a portion of; the inside. cylinder ofgthe':

stove body, and I Figure '3 is a verticalsectionalgview'rthroughs the center of thestove.

The stove consists: of a body side-vertical wall H- andan. inner shorter wall l2'which forms-a cylinderzl'3 'open at boththe' top and-=-bottom', the two walls being. connected bya .flat bottom-forming -member. l4; .A"base;: r is securedto. the) bottom 14: ofgthe reservoir .by'

means of, the-flange lfi'an'd has a'series: of air.

admitting openings. llin its. vertical:.-wall Ir8=- The open top of the outer wall H provides .a support for a. combined -gratesand formerB for the flame; while the. inner wall- .l'2'wsu'pports anaircontrolling: burner cap: and flame :directing: .meml-a berC The grate B is removable A and comprises an. upwardl-ytopeningchannel member- 21 of annular-iorm ghaving a flat; bot-a1 ll. and supportzthe grate;:;the-channe1 member- 2| being-telesc0ped=within the'outer bodywal l l:li.i Grate bars 26, e. g; fiveirrnumber,aresupported'; on the outer wall 23 and flange 25 of the grate and: extend::-radially: toward; the; center; 1101. ap-

A'having ana-n-- nular reservoir or chamber lllrformediby an outz-t from the: .stove r body" proximately:thednnem-wall: 24:; ,The-uppen outrr; side1 corners 2 of then grate bars;;ar.e:- rounded;- and the inner corners 28 are cut back at an an gle-to the-tom A ring supportlflds: provided for nner and? outer. walls or. the. channel member: The; ring; is sup-.=

portedbylegs ,3q-;:res-ting;;orr and. ecured'. 1305117116 annular bottom 22.: of the. g;rate, and the:7 grate-- bars 26,:are'rigid1y secured to;it.;;1 The: innerywalill .242: of: the channel member-- 2 l is provided-with: a

series of apertures 3 L; The: burner cap; C is inserted; in: thetop. of the, inside cylinder I3 otrhereservoir tQ-formameans; for admitting air to. the; flame: and; for: confining the flame. as it :emerges from the' stove-5:. The burner; capc. consists. of -acircular plate; 3% flanged-downwardly; at outer; :rim and, them inwardly for a short distance and-then ;down,-- wardly agai-n,;iorming flan esy 33,, 34.--and..-3.5...v The flange .-3,5 isinserted-telescopically intosthe inner cylinder 1 3;therinwardly;extending-flange 34 restg ing--= on top-: or; the. lcylinder.-. The plate .32.; has; a row-of. fperiorations :36 around it. near its peripha. ery and-theyvertical flan-ge- 331- also=has .a row; of. aperturesiil'a; atathe level; otthe top, ofythe collar. 38, which is secured within.thedqumwardl-yaexe tendimr:flangwez: 35,.. and extendshoth above and below-the edges ,of .the yfi-ange 35. of theburner: cap Centrally ,of:- the: plate v32sthere is secured? a-finelyperforated brass cylinder 3-9 which, when the 'bu-rnercap; is. .in position; extends upwardly through the: center or the-channel member I 2- l or the-- grate; to a: point-somewhat below. the; .topof,

the-innerflange 24, thclWallsofthe two-members;

being; spaced tor form a fiamespassage; Air en-- ters the cylinder through-the.open top and passes through the. perforations to mingle with the; mix-; ture otruel vapor and air bei-ngburned betweenthecylinderw andtheil-ange 24; 1-

r The annularr reservoi-r- Hi of the stove-body A-,

isprovided with" a; moldedasbestos. wick. 40-;which; substantially: fills -ithe. chamber, -below the -proj ectingyportion; formed =byl the flanges-$33. and 4: oftherburner icap vandgwhiclr is preferably slightie I ume cit-sander porouseartn; I

.Around the; hQdy;+-A1of-.the stove ti l am cylindrical shicld orzw-indiscreen 54. frictionally: secured tol -the of gther stove; by ,a; plurality; ome a.roux-)5;spr nzsrniwhiclnareenuallmspacedthe openings I 13in the base forthef ss tove. Shield 42 extends across the plane of perforations '31 for better control of the vapor passage through 7 whatever it is desired to heat may be supported on the grate B.

the latter. The air space 46 between the shield 42 and the stove body A serves to edualizeand regulate the heating of the ;reservoir containing the wick and gasoline, thereby promoting-and controlling the vaporization of the gasoline and making the stove burn more steadily, especially when used in a drafty or windy location. Since vaporization of the fuel depends on the heat.

transmitted thereto from the burner, it is important that the reservoir be insulatedso that vaporization of all the fuel may take place evenly. A carrying handle 41 may be provided for the entire unit which should preferably-be secured to the outside wall of the body A by means or ears 'A preferred-embodiment of the invention con sists of a stove body A substantiall -six inches-in diameter and 4 inches highs The inner cyl' inder I3 should be approximatel 2 /2 inches in diameter and three-inches high and the base should be approximately 1 /2 inches high. The base perforations l1 should'b'e approximately inch in diameter and spaced /2 inch from the bottom edge ofthe base 'and'may be twelve in number. The inner opening of the grate B should'be 2% inches in dia'meter'and the central cylinder 39 of the cap C shouldbe approximately 2% inches in diameter'and inch high, leaving aflame opening 49 about% inch the two members B and C. a

The apertures 3| in the inner flange 24 of the grate'a're spaced approximately midway betweenthe top and bottom of the flange. In order to secure a properly balanced supply of air and fuel vapor for the burner there maybe providedtw'en ty-two inch apertures 3i, fifty-three apertures 36" in theplate 32 andfifty-three 1 6 apertures3'l in the flange 33.

In operation the" grate B'is lifted froin 'the body of the stove and three to four ounces of gasoline are evenly distributed overtheasbes-i tos or sand. The grate is replaced and the stove is lighted by applying a fiame to the annular opening 49 above the burner'formed' between the grate B and the burner cap C. Air enters thestove through the perforations I! in the base and flows upwardly through the small inner cylinder l3 of thebody. Inside the burner cap-C the air mixes with the vaporized fuel entering through the openings 3'! and this mixture es caping through the openingsfifi is ignited at the outside of 'the cap. Additional fuel vapor from the annular opening between the burner cap and the grate is entrained inthe current flowing up-' wardly through the openings 36, and additional air for completing the combustion of the fuel vapor enters the flame passage through the open-'- ings 3! inthe grate and through the perforated draw fuel vapor in through the openings31, Therate of fuel consumption is about three ounces of gasoline per hour. -Canned food, utensils or wide between tions being located in a plane broken, lost, or out of adjustment. At the same time it furnishes a regulated supply of heat with maximum fuel utilization and efiiciency in combustion because of the relation between the grate and the burner cap and the design of the air admitting apertures.

The invention accordingly consists in the features and arrangements exemplified in the structure heretofore described, the scope and application of which are indicated in the following claims.

We claimf 1. A pressureless gasoline stove comprising an annular-fuel reservoir having'spaced outer and inner walls and adapted to receive fuel absorbent material, said reservoir having its outer wall higher than its inner wall, a removable grate and flame restricting member mounted on said outer wall and extending inwardly toward said inner wall to cover the reservoir andform a restricted passage with said inner wall, and a removable burner cap supported'on said inner Wall in spaced relation to said grate and receiving air frombelow to the space within the inner wall, said cap'having perforations for the admission of fuel vapor and perforations for the'escape of mixed vapor and air, said last-named perforaabove said firstnamed perforations. I

2.- A pressureless gasoline stove comprising an annular fuel chamber having an inner wall form-' ing a central air-admitting passage and an outer wall spaced from said inner wall, said 'inner wall having at its top a perforated extension, and a removable grate supported on said outer wall and extending inwardly to cover said fuelchamber wall and said perforated extension, said grate comprising an upwardly'opening annular channel member and a series of grate bars supported across said annular channel on the outer and inner rims of said channel, whereby said annular channel and said grate bars may be'unitarily removed from or inserted into said stove. V

3. A pressureless gasoline stove comprising an' annular absorbent filled fuel reservoir, a central air admitting passage being provided'within said reservoir, means forming-a burner spaceat the end of said passage and communicating with said passage and with said reservoir, said fuel being vaporizable in the reservoir b the heat of cornbustion in' said space, said last-namedmeans having perforations 'for the admission of fuel vapor-and perforations for the escape of mixed vapor and air,.said last-named perforations being located in a plane above said first-named per-' forations, an' apertured base for said reservoir through which air is supplied to said central passage, and a wind screen having means friction-' all securing it to-said stove'body and forming an insulating chamber around said reservoir, said wind screen extending upwardly across the planeof said first-named perforations in said burner cap, and said wind screen securing means projecting below said wind screen to support it in spaced relation to the bottom edge of said aper tured base. I

4. A portable gasoline stovercomprising an annular open-topped fuel chamber having an inner cylindrical wall forming a central air passage and a higher outer Wall, a removable grate having a channel-shaped annulus telescoped within said fuel chamber and grate bars extended transversely across said annulus, said annulus having an external flange resting on the top of said outer wall, and a removable burner cap having a portion telescoped within said lower inner cylindrical wall and a flat-topped portion projecting above said wall, said last mentioned portion having series of perforations on its side and around its top and an upwardly projecting perforated cylinder secured to said top and extending within and spaced from said annulus to form a flame passage.

5. A portable gasoline stove comprising an annular fuel reservoir having a central air admitting passage, a burner cap mounted over said central passage, means providing an annular burner passage adjacent said cap, said cap having a portion enlarged to extend over the reservoir and having a perforated zone at the side to draw in fuel vapor from the reservoir and having perforations in a plane above said zone for the escape of mixed air and vapor, and means within said cap to direct the incoming air toward said last-named perforations.

6. A stove as defined in claim 5, wherein said first-named means comprise a cylindrical extension on said cap and an annular grate carried by said reservoir, said grate and said burner cap extension being perforated for the admission of air to the flame.

7. A portable gasoline stove comprising an annular fuel reservoir having a center air-admitting passage, a burner cap mounted over said center passage, means providing an annular burner passage adjacent said cap, said cap having a portion enlarged to extend over the reservoir and having a perforated zone at the side to draw in fuel vapor from the reservoir and having perforations in a plane above said zone for the escape of mixed air and vapor, and annular bafile means within the cap to direct the incoming air towards said last-named perforations.

EARLE D. QUINNELL. CHESTER. L. EPPLEY.

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

UNITED STATES PATENTS- Number Name Date 185,533 Hildebrandt Dec. 19, 1876 194,242 Hutchins Aug. 14, 1877 212,305 Fleming et -al Feb. 18, 1879 695,979 Widmer Mar. 25, 1902 1,339,059 Grochmal May 4, 1920 1,661,939 Grayson Mar. 6, 1928 2,219,170 Bailey Oct. 22, 1940 2,254,248 Stirlen 1 Sept. 2, 1941 FOREIGN PATENTS I Number Country Date 60,615 Germany 1892 208,830 Great Britain Jan. 3, 1924 405,156 Great Britain May 1, 1934 871,314 France Apr. 20, 1942

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