US2517985A - Chimney for liquid fuel burners - Google Patents

Description

Aug. 8, 1950 M. A. DAVIS CHIMNEY FOR LIQUID FUEL BURNERS M 8 e o 4 W n 9 vim/$94 n n n I e 8 m m Hi. J 2 d 4 u 4 i F 4 III! 49.5.. lo 4 Inventor Ma/com A Dav/s l p. lm struction for use in conjunctionwit'hua. w k o r wickless type liquid fuel burner, such as'i' aak'erosene burner, the primary object, of .whichnisto ten e. the combustion tube of the ,ch'i'mney thus preventing sudden iiarin'gigof flame, for-(the smotheringofthe-flame.

Another object'of this invention is to provide a novel chimney construction'which will consume less fuel than the ordinary conventional chimneys'now in'use,'hence providing a"cl e'a nei and more efiicientfiame. I

Yet another object oflthis invention; is to provide a novel chimney construction which elimi nate's,the need for cleaning and relightingof provide a novel chimney construction fcr'l fi in "connection with a liquid burnerwhichwill'substantially reduce the smoking of pots and'kit'chen and; will thuseffect a saving of time aiidener'gy upon the'ipart of the user in cleaning the sine. j. Xetanother obj ect'" of thisfinvention is" a novel chimney construction fo conjunction" with'a liquidf f uelfburne s makes possible a more accurate control of flame for various types of cooking or heating.

A particular feature of this invention is the provision'of a chimney which includes an outer casing having an upwardly tapered neck portion and a central opening associated with this neck portion, the outer casing being providedwith a plurality of spaced apertures adjacent the taper of the neck portion and an inner rim'or perforated flange secured to the bottom of the casing. This arrangement of apertures provides a very efficient means for the circulation of air upwardly through the casing for the proper ventilation of and spreading of the flame jutting out'of the central opening. In addition, a disk or cover plate is provided of greater diameter than the neck portion of the outer casing which is positioned to overlie the central opening and serve as a shelf to retain water and other foreign matter and prevent them from entering the combustion chamber.

These, together with various ancillary objects and features of the invention which will later become apparent as the following description preventwater:orpther}.foreignQmatter from en were, F

' chimney; construction fof the a a e invention",

some parts being shown in space ,;Figu re; 2 is a transverse- "orizon'tal sectional Vvi W of the chimney taken substantially on the pl ane of section'line2 r-2IofFigure 1; and

I Ei'gureB is .a bottom plan view of the chimney. Specific reference is now made to the draw- .ings. .,Intheyseveral views in' the accompanying drawings andin {the following, specification sin1 -'v ilar referencefcharacters indicate corresponding velements throughout.

...', Generally indicated at '10 is an outer casing or container, preferably cylindricalin shape, which has an. u wardly tapered neck .portion l2 and a central annular lopening l4 at the upper endof mis ap-peruse; The bottom ,of the outer ing J9 is;providedj..with"amihner rim or flange [6 having-la plurality of circumferentially; spaced errorat;ons"jla; 'While the inner rim ,Himay simply;.b afiatextension orflange', it is prefereded with a' vertical integral lip 20. The Oil er.

, h asing I0 is further provided with a pluralitypf circumferentially spaced apertures g; which are positioned in the walls 0f the casin 'jf ustbeloyvfbut. proximatetbthe taper. vThe outer I, be] additionallyiprovided with a conventional hand-lejportionMQ, E l

Positioned hin the cylindrical portion of the outer casing I0 is an outer combustion sleeve 26, which is also preferably cylindrical in shape, which is provided with a plurality of spaced apertures 28.

Concentrically positioned within this outer combustion sleeve 26 is an inner combustion sleeve 30' which consists of a lower, preferably cylindrical, portion 32 having a plurality of apertures 34; The inner combustion sleeve 30 is further provided with a top plate 36 to which is secured a reduced, preferably cylindrical, portion 38 which is not perforated. As will be seen from Figure 1, this reduced portion 38 is located in the tapered portion or neck of the outer casing and is spaced from the walls of the casing to produce an annular flame opening 40.

A cover plate or disk 42 is provided which may be secured in any desired manner to the inner combustion sleeve 30, which disk is greater in diameter than the diameter of the central opening I 4 in the tapered neck of the outer casing and which is positioned to overlie the central opening 14 and to be spaced from the upper edge of the tapered-neck [2. Thus, a second flame opening 44 is provided which is communicative with the flame opening 40. While the disk or cover plate 42 may be secured in an manner tion 50. i;

To secure the outer casing, the inner combustion sleeve, and the outer combustion-sleeve together in a unitary structure, a pair of-crossed,

rods 54 are provided which are secured centrally to each other and which extend throu'gh appro- 5 priate openings in the side walls of the outer casing, the inner combustion sleeve, and the outer combustion. sleeve. Offlcourse, these cross rods may additionally be welded "or, rivetedto the side wallsof thesemembers. r V j In practical operation-,the-flame from theliqnid fuel burner will pass between the walls of the.

inner and outer combustion sleeves and up through the tapered neck ofthe outer casing'and eventually out through the flame opening 44 and around thelcover plate'lz. willpassupthe inner combustion sleeve and out through the apertures provided therein to beadmixed with the flame, while air will also be drawn inthroughifthe apertures i8 provided in 'the'rim'i'S of theouter casing and will be' admixed with'the'fiame in the top end of the tapered'portion 0r neck 'l2. The apertures 22 provided in the outer"casingadjacent the taperedneck'portion I2.- willserve as means for the inlet of .cold' air. and assist in the circulation. of air in' the outer casing. hBy'providing a cover plate 42 which'is larger'in' diameter than-the central opening through which the flame passe water or any other foreign matterwilllbe prevented from falling; into the combustion chambersl.-

In' view of'the foregoing description taken iii conjunctionfvvith the accompanying drawings," it is believed that a .clearunderstanding ofthedevice will be quite iapparentto those skilled in this 4 art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims. Having described the i-nventiomwhat is claimed asinew iiszi f" if. I. 1; Q

l. A chimney for a liquid fuel burner comprising outer casing including an upwardly tapered neck portion having a central opening and spaced apertures adjacent the neck portion, an inner and anputer perforated sleeve concentric with said casing, a cover plate of larger diameter than said ."neck-'-'portionsecured to the inner sleeve, spaced fromsaid outer casing and overlying said central opening, and means interconnecting said sleeves with said outer casingpsaid outer casing includ ing 'anjinn'er; perforatedjfiange secured to the bottom thereof." V 2 "Thef combination "of claim 1 whereinsaid means includescrossedrods.

3. The combination of claim 1 whereinsald inner sleeve includes a reduced upper portion and a lowered perforated'portionfl MALCOM A. DAVIS.

REFERENCES CITED I The following references. are of record "iniithe me of this patent:

Scott-Snell May 7,1940

Images