US1827951A - Stove - Google Patents

Description

0d 20, 1931- v c. w. MUMMERY 1,827,951

STOVE Filed Sept. 7, 1926 .l 2 Shets-Sheet 2 y"25 tion; Y. 1 V- Fig. 2 is a plan viewv vviththe lid open andl I Patented Oct. 20, 1931 Y *Y PETEDSTATES;

inzien ,oLYDE WQ MUMMERY, or DETROIT, iniciar-:faul

srovE n Application iiledseptember '.7, 1926.v SerialA 116.134,011.V

This invention relates -to stoves ofthe type in which liquid'fuel is vaporized in a generator, mixed with air and supplied to several burners; and it has for its principal ob- 5 jects to permit any one or all of lthe burners to be quickly put in operation', to permit the supply of fuel to the burners to be quickly changed from high to low and vice versa, to

,Y improve the control of 'theflame as it issuesl 1'0 from the burner, to 'permit uniform generation in spite of drafts, to provide a construction that can be economically manufactured,

to make thecontrol of. the valves easily accessibleVK While being protected from injury, "1'5 and to provide an improved 'casing' for porta-` ble stoves. v "i j 'Further objects" f and advantagesfof the invention Will be understood as the dis- Y closure proceeds and the V,description Vis read "2'0 in connection with the accompanying drawings illustrating ai'preferre'd embodimentof` the invention,`and in which"Y Fig. 1 is a perspective'view of the improved stove Vready toA Vbe opened and Yset inoperabroken away; y f l y Fig. 3 is a transverse vertical sectional View taken on the line 3-3 of Fig.

Fig. l is a perspective view of a fragment of the stove illustrating the mixer, its shield, f the distributingchamber and the feed pipes;

and f i Fig. 5 is a perspective view of a shieldfor protecting the generating flames.

In its preferred form the stove includes a generator burner 1Q, and'three 'other burners 11, arranged at the cornersfof' a square. The fuel, preferably gasoline, is -carried in 40 a supply .tank 1 2, equipped With Aa pump 13 by Which pressure'may be puton the fuel to force it through thefeedpipe 14 to the rgenerator'15, under the control of the generator valve 16.l `The generator converts 'the fuel Y45 into vapor Whichissues from the nozzle 17 thereof into amixer, generally indicated by A, from which it passes to',v a 'distributor chamber, generally indicated by B, and thencel through eed pipes 18 to the burners 50-10and11.-1"f- 7 The generator here shown is of oonventional structure. Thev valve 16`permits the gasoline to flow into the tube 19, Which is acted upon by flamesk lfrom lthe burner 10. The valve carries a cleaning rod 20, which runsthrough the tube 19 and serves to keep",Y

the nozzle 17 always open for thefree flow of vapor When the valve 16 isv open. p z The mixer'includes a casing, generally vindicatedv by C,.and a tube'21'leadin'g to the distributing chamber B. The tube is the length of commercial tubing, to one end of Which is fixed an annular disc 22, to which initurn is fixed a short length of larger tubing or pressed metal 23,- cut away` at `the bottom, as indicated at 24,v and perforatedv at" the frsides,as shown at 2.5, to provide forthel` free admission'of air.v The Aend, lof the casing C is form'e'd'by a disc 26,"fixed to the Wall 23 in H any suitable manner, and perforated-at 27to admit'the' vapor from the mixer. i

vThe mixer'isprotected by a shield, gener'-y ally indicated by D, Whichincludes sides 23 i connected by atop 29 and a back 3.0, the lat- Y ter being perforated in alinement Withthe perforation 27 to receive'the nozzle 17. The; sides 2,8 straddle the mixer and the feedY for the pipes ,18,` surrounded by inwardly tapering flanges 33 all lyingin substantially pipe 18leading` to the ygenerator'burner 10.

y .chamber B by preference V.1s composed of a piece ofrelatively large commericial tubing 32, punched to from openings S the same plane and'lying along diagonals of the square at the'cornerstof lWhich the,v burners are arranged; 'The fuel pipes`18ware lengths of commercial tubing, slightly tapered at their inner ends and lpressed into the iianges `33. 'A similar connection is made betvveen the tube21 and the flange 5,7 The lends of ihe tube 32 are closed by vstamped heads'58,

pressed into the tubeand vheldin vplace by friction.f l Secured to` the outer ends vof the pipes V18 are burner castings, generally indicated by E,

lWhich form valveca'sings and the. base p0r-k tions of t-he burners. Each casting includes a substantially horizontal tubular portion 84 and an upwardly directed tubular portion 35, on top of which is a disc 36. The inner ends of the tubular portions 34 are counterbored to form slight shoulders 37, and the tapered Y ends of the pipes 18 are pressed to a seat against these shoulders.

A valve head 38 is mounted to move bre-'1 tween a closed position resting against the" end of the tube 18, anda full open position i at the oppositeV end of the tube, indicated by dotted lines in F ig. 3. The Valve head Vis swiveled on a stem 39,.which is rotatably and i slidably mounted in a short tube 40, threaded into the outer end of the tubular portion 84.

`The tube 40 has-a short external thread 41,

and the stem is equipped with a cup 42 having a corresponding internal thread 43. Very little rotation of thestem in-one direction serves to open the valve and disengage the .cup from the sleeve, whenthe head can be thrown to the opposite end of the `valve chamber,leaving the fuel passage wide open. A

similar reverse Vmovement will almost close thefuel passage, when a slight rotation in the opposite direction will seat the valve and entirely close the fuel passage.1

Ordinarily no valve will be provided for the generator burner other than that which forms apart of thegeneratonas indicated The disc 36 receives a ring 44, having a plu-v rality ofrows of perforations 45, and Von top of the ring is a disc-46, secured to the casting Eby stove bolts 47. The disc36 is provided `with a marginal flange48, presenting an up-V -wardly andoutwardly inclined surface 4,9

tothe fuel and flame issuing` from `they perforations. The disc 46 has a somewhat similar, flange 50, of greater extentv but less in. clination. The two flanges combinexto make the flame cup or curve upwardly and stillprevent it from coming toostraight up'fromthe perforations when very` low. Y Y.

In the generator burner 10 the disc 51, cor-` responding to the disc 46 in the other burners, is provided with a plurality of openings 52, belowwhich are perforated discs 53, which permit of a plurality of jets of fuel andflame Ato issue upwar'dlyfrom the burner'and act `upon the tube of the generator. Inl order lto prevent uneven generation due to drafts of aira shield, generally indicated by F in burner. The construction so far described is capable of use in stoves `for a variety of purposes; It

.can be very readily manufactured fromfcommercial tubing, stampings and light castings. The principles disclosed may be incorporated in stoves having a lesser or greater number of burners, and arranged to suit particular conditions. Y Y i The distributing chamberB should be relatively large as compared with the feed pipes 18. Otherwise the valve-controlled burners cannot be lighted until the generator burner hasin a` measure warmed up the entire device. The relatively `large distributor and the relatively small feed pipespermits any one br all of the burners to be lighted as occasion may require.

rl'he valve construction permits the burner to be quickly adjustedfrom a'low llame to a high flame, by merely pulling or pushing the Valve stem. This is a decided advantage over prior constructions, where the valve heads are moved slowly by the rotation of the Vthreadedhsteni and considerable time and labor are required to move the valve between full open and full closed positions.

The letter G generally indicates aca-sing or box Vparticularly adapted for use when the stove is to be portable'or is, what is conimonly referred`V to as, a camp stove. It is made ofsheet metalfand includesa bottom 59 and a top 60.-, which forms the lid and is hingedv to swing from the'position shown in Fig. 1 to Vthat shown in Fig. 2. 1 The walls of the casing comprise relativelylong sides` `61, connected by? ,relatively short sides 62 `.at right angles tothe diagonals of the `square upon the cornersof which theV burners are arranged. Thisxhas theveect of chainfering or beveling the corners of the yrectangularfigure, and notonly eliminates the objectionable sharp edge lbut improves the appearance, and provides for the location of the valve handles '63 within the angle formed by the projecting long sides 61 and still outside the casing, where they can be `readily reached, and wherethe operators hand will be protected from the flame and the hot utensils by the wall ofthe casing. Y'

Y The fueltanlr 12 is secured along onev of the long sides 61 by straps 64, which carry a handle 65 by whichthe entire organization can be readily liftedand transported. .u

The straps are secured to apressedmetal frame` 66by rivets orV bolts 67. When the rdevice is. being carried by the handle 65, the

valve handles 63 are protected by the adjacent corners 68 formed bythe long sides 61 Four legs, 69, are pivoted in slips 70, and

may be swungfronr the position shown in Figs'1and 3 toa positionin which the` arms 71 lie flat against the bottom, and the braces 72`extend inside the casing along the burners. The tips 7 3 ofthe braces 72 spring into iso A U-shaped brace 77 has downturned n-V gers 78 at its ends, adapted to project',V through a flange 79 on the casing when thestove is in folded position. They will also project through holes 8O in the frame 66 and.,

hold the brace in position to support the lid open and parallel to the bottom, thereby forming a shelf or table adjacent to the burners.

yUse has been made o-f specific description and illustration in order to give a complete and clear disclosure,'but it is not intended to thereby limit the scope of thepatent or require it to be given amore restricted interpretation than is made necessary by the prior art.

I claim as my invention- I l. In a stove, the combination of a generator for liquid fuel, a mixer receiving vapor from the generator, a relatively large distributing chamber to which the mixer delivers adjacent to the top and provided below with a plurality of lateral outlets of small size compared with the chamber, a plurality of burners, and a supply pipe connecting each burner with a lateral-outlet. y

Q. In a stove, the combination of a generator for liquid fuel, a mixer receivingvapor from the generator, 'a relatively large cylindrical distributing chamber to which the mixer delivers adjacent to the top, a pluralit)y of burners arranged around the distributing chamber, and a plurality of burner supply pipes connected laterally to the cylin' drical chamber and leading to the burners.

In a stove, the combination of a gener-v ator for liquid.fuel, a mixer receiving vapor f' from the generator, a relatively large distributing chamber, a Vdelivery pipe connecting the mixer with the distributing chamber adjacent to its upper end, a plurality of burners arranged around the distributing chamber, and a plurality of relatively small supply pipes radiating from the distributing chamber tothe burners.

4. In a stove, a generator for liquidfuel, a

burner, and means for controlling the flow of fuel between them including a valve casing having a relatively long valve chambertherein and a relatively short threaded portion, a

'valve head movable in the chamber, a stem connected with theV valve and having a corresponding threaded portion adapted to enlgage the threaded portion on the'casing when the valve is nearitsclosed position only.

5. In a stove, a burner including a bottom and top, and a perforated ring between them,

the bottom and'topeach having a flange 'surrounding the perforated ring presenting an upwardlygand outwardly inclined surface to the i burning fuel issuing'ffrom the. ring,"the iiangeonthe top being of greaterfextentand all less inclinationthan the flangeon the bottom. .l

6. 'Ina stove, aburner having upwardly directed'flame openings, a generator extending across the burnerfin the path of the flame' issuingv across the burner in the pathof the flame v lssuing from said opening, anda shield comprising a disc mounted on the burner and having a diametrical arch extending over the generator. f 1

8. In a stove, the combination of a generator for liquidfuel, a mixer receiving vapor from the generator, a plurality of burners, a

l distributing chamber comprising a length ofY relatively large tubing arranged upright andV connected adjacent to the top with the mixer, and a length of relatively small tubing adj acent the bottom'connecting the distributing chamber with each burner.

9. In a stovea generator for liquid fuel,v

a relatively large distributing chamber, a

plurality of burners arranged around the dis-` tributing chamber, a plurality of relatively small pipes radiating from the distributing chamber to the burners, a mixer between the generator. and the distributing chamber including. a tube entering the chamber, a relatively large casing at the end of the tube opposite tothe chamber, said casing being open at the bottom and perforated atthe sides to admit air and also being'perforated in alignment with the tube to receive vapor from the generator.

cli

' l0. In a stove, the combination of a burner.

and-means for controlling the iiow of fuel f Ainto the burner including a valve casing havv ing a valve chamber therein, ya relatively short portion of which casing is screw threaded, a valve head movable in the chamber, a stem connected with the valve head having a threaded portion adaptedto engage the corresponding threaded portion of the valve casing only when the valve is operated adjacent its closed position.

1l. In a stove, the combination of a burner, j

and means f for controlling the flow of fuel into the burner comprising a casing having a tubular valve chamber therein, a valve longitudinally movable within the casing, complimentary screw threads on the valve andcasing enabling the valve to be moved from closed position to slightly open position by I rotation ofthe valve, said screw threads being of such length only as to permit the valve to be moved from slightly open to fully open position by anneke` rectilinear -thiustlon the valve. J i l2. In4 a stove, the combination ofsarburnei',

a fuel conduit `for supplying vfuel to the' burn/13; anda VValve interposed-in the Voonduit' to adjustably regulate the flow of fuel into the burnensaid valve havinggraduated lmeans operable only by rotation of the valve foiinoving the Valve from Closed position to a position inte'rinediatev the fully open position, and means associated therewith permiti tingtlie-Valve to be'inoved, from' said last 1 named position'to` fully open position bya 1in-ear force acting along the axisof thevalve.

v In testimony whereof- I afx my signature.

GLYDE NV. MUMMERY. Y,

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