US 2565676 A
Description (OCR text may contain errors)
Filed Dec. 29, 1947 Aug. 28, 1951 T BRODAHL STOVE FOR STEAM BATHROOM Patented Aug. 28, 1951 STOVE FOR STEAM BATHROOMS Tryg've Brodahl, Storjordet, Honefoss, Norway Application December 29, 1947, Serial No. 794,372 In Norway March 13, 1943 \Section 1, Public Law 690, August 8, 1946 Patent expires March 13, 1963 3 Claims.
This invention relates to improvements in stoves for steam bath-rooms of the type having a container above the combustion chamber for containing heat accumulating material, such as stones, which upon admission of water thereto generate superheated steam.
The object of the invention is to provide a stove of the above mentioned type which ensures an increased circulation of the bath-room air, a more intimate contact between such air and the heat emitting surfaces of the stoves and between such surfaces and the combustion gases and the stone container provided in the stove, whereby the body of stones becomes so heated that an effective generation of steam may take place.
The invention is characterised in that the container is of substantially pear shaped cross section and the upper end portions of the side walls of the housing converge parallel thereto whereby relatively narrow outlet channels of uniform cross section are formed between the walls of said housing and container, and said channels meeting at the top of the housing towards the outlet for the combustion gases.
In order that the invention may be more clearly understood one particular embodiment thereof will now be described by way of example, with reference to the accompanying drawing wherein:
Figure 1 is a front view of the stove,
Figure 2 is a side view thereof,
Figure 3 is a vertical cross section along the line IIIIII in Figure 2, and
Figure 4 is a vertical longitudinal section through a modified embodiment of the stone container.
In the drawing 1 and 2 indicate the two end walls of the stove, which are provided with legs and preferably have detachable top portions 1,, 2' for giving access to the inside of the stove and thus facilitate replacing or exchanging of parts. Between said end walls i and 2 is mounted a housing 3 forming a combustion chamber 9, which in vertical cross section has a round shape at its lower end and widens uniformly up to about two thirds of its height, above which its width again decreases uniformly so that the housing terminates in converging side walls in a tapered portion 3' at the top. The housing may be provided with usual surface ribs IT as shown.
A container 4 for heat retaining solid material. such as stones l8, arranged in the top part of the housing 3 above the combustion chamber has converging side walls and is of pear-shaped cross section, so that between said container 4 and the adjacent walls of the housing 3 there are formed relatively narrow channels 5 of uniform cross section for the combustion gases. At the top of the housing 3 is an outlet 6, preferably arranged on the longitudinal axis of the stove.
At some distance above the bottom of the housing 3 is provided a grate l bounding off an ash pit 8 from the combustion chamber 9- situated above it, access being had to these chambers 8 and 9 in usual manner through doors Ill and H respectively provided in one end wall 2. 1
One end 4 of the container 4 is open and connected to the end wall 2, and the other end thereof rests upon brackets l2 secured to the other end wall I, the length of the container preferably being somewhat less than the distance between said end walls, so that a narrow channel, I3 for combustion gases is formed between the rear end wall 4' of the container and the end wall I.
The end wall 2 is provided with one or more relatively large slotted openings 14 which open from the interior of the container 4 to enable the issue of super-heated steam, which is obtained by admitting water to the heated stones or other material through a tube l5, which is introduced into the container and extends longitudinally near the top or apex thereof.
In the embodiment of the stove described above the combustion gases from the chamber 9 flow upwardly through the channels 5 at each side of the container 4 with negligible resistance due to the uniform cross section of said channels, and due to the relatively narrow cross section thereof the gases will also attain considerable velocity whereby an intense transmission of heat from the gases to the channel bounding surfaces of the housing 3 and the container 4 is obtained.
Due to the upwardly tapered shape of the container 4 soot and ashes is prevented from accumulating thereon and of thus preventin the passage of the gases or an effective heat exchange. The shape of the container 4 also p11); vides for a more effective generation of steam, because the water introduced at the top of the container will be more uniformly distributed over the walls of the container and the heated body of stones or other material.
The air in the bath-room will, due to the streamline shape of the outer surface of the housing, flow upwardly in intimate contact with said surface without formation of eddies, and in combination with the increased issue of heat from the housing 3, due to the arrangement of the channels 5, a highly increased circulation of well one or more vertical through channels or ducts l6, as illustrated in Figure 4, the cross 'sectionsof which ducts decrease towards the top of :the con-'- tainer, where their width is so small that only:
the amount of gas necessary for heating of the her in the lower portion of said housing; a container arranged in the upper portion of said housing and having also converging side walls being parallel to said converging side wall portions of said housing and being spaced therefrom said container being open at one end; relatively narrow outlet :channels of uniform cross section formed'between said converging side wall portions .ofsaid housing and said converging sid walls of container, said container may beprovided' with 5'."-
interior layers of the body of stones "can pass "facing and connected to said end wall so as to through. When the container is provided with such ducts l6, two jet tubes [5 are preferably ari ranged, each extending}?longitudinally of the containeron eachv side of :the ducts. l
The above arrangements-overcome -the :previously experiencedudisadvantage of stoves of'this type, which was that t-he'body of stones. became insuflicie'ritly heated to 'ploduce the desiredsuperheated'-steam.-
I'claim: v e
1. A wstove ior'a'steam bathroom'comprising in combination-a housing composed .of two opposite end walls having-detachable 'upperend wallarranged in said "container; tube means- :for in-- troducingwa'ter into said =container--so that the same contacts said heat retaining material "when introduced into said container andlcreatessteam within "said container; aebracket-mounted on one of said opposite end walls; said open end of said container-being connected to the :detachable upper end wall portion of the other of -saidoppo-- site end-walls; said container resting-wheninserted into saidhousing -on .said bracket and forming between its rearwa-ll and :theadjacent detachable upper end wal1 *portionofsaid :housing a re'lat-ively narrow rise channel for the-combustion gases; and 'means-in=said -.detachable upper end-p0rtion of said other oi said opposite end walls fordischarging said steam from said container.----- r g 2. A stove for a steam bathroomcomprisingin combination a housing composed of two opposite end walls and two side walls having upper converging sidewall portions; a combustion chamsaid container; heat retaining solid material arranged' ini'said container; tube means for introducing water into said container so that the same contacts said heat retaining material when introduced-into said container and creates steam within'said container; slotted openings in one of said end walls; means for securing said container to the'last mentioned end wall with its open end permitiescape of steam from said container through said slotted openings; and means on the other of said end walls for supporting said container within said housing.
. 3. A stove for a steam bathroom comprising in combination a housing composed of two opposite.
end walls and two side walls having upper converging side wall portions; a combustion chamber in the lower portion of said-housing; a container arranged the upper portion ofsaid housing and having also converging side walls being parallel-tosaid converging side wall portions of said housing and being spaced therefrom; relatively narrow outlet channels of uniform cross section formed between saidconverging side wall portions of said housing and said converging side walls ofsaid container; heat retaining solid material arranged in said container; tube means for introducing-water into-saidcontainer so that the same contacts said heat retaining material when introduced=into said container and creates steam withinsaid container; at least one gas duct extending vertically through said container and having a cross section decreasing towards" the top of the same; and means for discharging the steam created within saidcontainer.
' TRYGVE BRODAHL.
REFERENCES CITED The following references :are of record inthe.
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