Патент USA US2137469код для вставки
Patented Nov. 22„ 1938 UNITE 2,137,469 STATS TET yclerics. .» allevato sro Hiram It. son, Leavenworth, Mans., assigner to Great Western Stove Company, Mans., a corporation ol venworth, a »apuestan aua lo, rose, 'anni no.; sans 9 ‘il l hill ‘t (GUE. 1126-93) s invention relates to stoves, particularly to those for burning fuel oils, vsuch as furnace oil or light colored distillate, and has for its principal object to provide a stove of this .character which. is capable of efñcient opera tion throughout the entire range of burner ad .lustmenh that is, from low iire to high hre, thereby providing any degree oi heat which it is desired to generate. p ' @ther important objects of the invention are to provide a stove of this typev with a simple, inexpensive preheater whereby a part of the com--A hustion air is heated prior to its mixture with unheated air;` to provide i'or selectively propor ï it tioning the ratio ol’ the unheated air to the pre heated combustion air; and to provide for miu ture oi the unheated and heated combustion air t. 'the wall of the combustion cylinder is pro vided with a plurality oi various sized openings itl designed to admit sumcient air i’or supplying requirements of the blaze rising within the com bustion chamber during operation of the stove. Seated upon the harige t is a _flame flattener lt preferably comprising a casting having an an“ nular dange il seated on the ñange t and a de pending ñange lt sleeved within the upper end 10 of the combustion cylinder. The dame ñattener extends across the top of the combustion cylin-~ der and has a suitable opening it therein tor passing the dames to the upper part of the shell. '.'Chreaded into the bowl il is a iuel supply pipe it having a control valve il therein .tt is op erated by a regulatingstem lt extending laterally prior to Ãadnflission into the combustion chamber. ln accomplishing‘these and other objects ci’ under the bottom plate «t and having its outer the invention, as hereinafter pointed out, l have provided improved details of structure, the pre from the danse il. llt‘he pipe 2t extends in the 20 i’erred form df which is illustrated in the accom panying drawing, wherein: ` lille. l is a vertical section through a stove em bodying the features of the present invention; liî‘lg. 2 is -a horizontal section through the stove on the line -t--l of Fig. l. ` Fig. t is a detail perspective view of the pre «till between the division member t and bottom plate heater ior a part of the combustion air supply.y Referring more in detail to the drawing: l designates a stove which includes a shell t preferably cylindrical in cross-section. and hav ing its upper and lower endsv closed by plates il and il. The upper plate t is oi solid construc dh tion, however, the lower plate has a plurality of air inlet openings t arranged in circular series about the axis of the` shell and through. which ' air is admitted, as later described. The lower ' plate t has an outwardly anddownwardly daring end rotatably mounted in a bracket it depending . l opposite direction and is-supported in a bracket ' llt depending from the under side of tha plate il. The outer end of the pipe carries an elbow tt provided with a nipple lt that is connected with the outlet ot a sub e r » .a or pan il in which an oil 25 supply tank it is inverted. The ïoil tanh td is provided’with an automatic outlet valve it as in conventional oil stove practice, which allows ba rometic feed of the oil in promrtion to the amount nowing through the valve il into the combustion 30 pylinder. The subtanlr is supported on an angle shaped bracket tt that is ñued to the lower end tl ci an arcuate shield ltd. Ill‘he shield tt er? tends upwardly 'along the side oi’ the shell t and protects the supply tank from the effects of the 35 heat generated in the stove. The shield is car ried from the shell t by means of bracket arms tt and tt hired to the upper and lower ends ol a preheater tt. shirt t to which legs 'l are attached for support The preheater it includes an arcuate shaped 40 ing the shell above the floor and to provide space v casting having lateral iianges tt and dl that are whereby air may flow to the openings t. Mounted ed to the side oi” the shell i by means of bolts in the shell 2 at a point spaced above the plate or other suitable fastening devices to form a ver t is a concavo-convex divisionv member t ar tical duct extending downwardly alongside oi the ranged with its concave side uppermost. Formed in the bottom ci the division member is a down set, annular seating ñange d encirclingv an open ing llt that aligns with a bowl il that is sup ported by lugs li' in an opening t' of the bottom shell and in heating relation'v therewith. The v lower end of the preheater is closed by a hori- ¿ plate t. ' ‘ Suspended within the opening Il) and having its lower end seated on an annular shoulder it of the recess il is a combustion chamber includ zontal plate tt to divert air that is drawn through ' the open upper en lor dow through an :ff ‘n tt formed in the shell at a point below the division member t. 50 The upper end oi’ the stove is provided with an outlet tt for the spent products oi’ combustion which outlet is connected with a. suitable »due or ing a cylinder it which further cooperates with other vent' by means of a stoveplpe tl. The the shell 2 to form ari annular air chamber it ~ products of combustion moving through the stove 2,137,469 2 are retarded by means of a baille and heat equal forming an air supply duct in heating relation izer 42 that is fixed to the inner side of the shell with the shell and having connection with the 2 at a point below the flue outlet. The baille air chamber, brackets carried by the supply thus provides a tortuous path for the products duct, a guard supported by the brackets, a fuel of combustion before they can flow through the supply tank carried by the guard and shielded flue outlet, thereby retaining the heat units from ‘ from heating effects of the shell by the guard, a I escaping to the flue. The shell 2 is provided burner in the shell, and means connecting the above and below the division member 8 with in supply tank with the burner. 'spection and service openings 4I and 44 that are 2. A stove of the character described including 10 closed by doors 45 and 46 as in conventional a shell, an air chamber in the shell, means form practice. ing an air supply duct in heating relation with4 _In order to facilitate vaporiz'ation of the fuel the shell and having connection with the air admitted into the bowl Il, I provide a vaporizer chamber, brackets carried by the air supply duct, 41 in the form of a baille having legs 48 for sup a substantially arcuate guard supported by the 15 porting the defiector portion thereof in spaced brackets, a fuel supply tank carried by the guard relation with the oil outlet. The legs are spaced and shielded from heating effects of the shell by apart to provide outlets for the fuel into the the guard, a burner in the shell, and means con» g combustion cylinder. necting the supply tank with the burner. 3. A stove of the character described including In order to control the amount of unheated 20 air admitted through the inlet openings 5 and a shell, a fire-pot supported in the shell, a per thereby regulate ratio of the >heated combustion forated combustion chamber cooperating with air to the unheated air, the plate 4 is provided the bottom of the ñre-pot and the shell to form with a shutter 49 comprising a ring 50 movably an air chamber circumferentially of the com mounted about the periphery of the combustion bustion chamber, said shell having an air inlet opening located below the fire-pot and at an ele 25 cylinder and having openings 5I therein regis trable with the openings 5. It is obvious that by vation near the top of the combustion chamber, a moving the shutter in an arcuate direction about conduit supported in heat conductive relation the combustion cylinder the eifective'port area of with the shell for supplying heated combustion the openings 5 may be regulated to that best air tov the air chamber through said opening, means for supplying unheated combustion air 30 suited for supplying the required amount of com bustion supporting air. ° circumferentially of the air chamber and below In using a stove constructed as described, the the inlet for the heated combustion air, means valve 2| is opened to allow ñow of oil from the for supplying aI ñuid hydrocarbon fuel Yto the tank into the bowl Il . The oil is then ignited in combustion chamber, and means for regulating the supply of unheated combustion air for con 35 the combustion cylinder. A part-of the combus tion air is admitted through the inlet openings I trolling draft of air through the conduit supply 10 15 20 25 30 vwhile another part of the combustion air is ad ing heated combustion air to proportion the mitted through the preheater by reason of draft _ratio of said combustion air supplies in the air through the stove to the flue outlet. The heated chamber for controlling the degree of heat gen and unheated combustion air, after mixing in erated incidental to combustion of the fuel. the annular chamber I4, passes through the open4. A stove of the character described including ings in the wall of the combustion cylinder ~to a shell, a fire-pot in the shell. a cylindrical ccm support combustion òf the fuel. After the stove bustion chamber cooperating with the fire-pot is heated. the portion of the air supply admitted and the shell to form an annular air chamber and through the inlet openings 5 is regulated to an having openings connecting the air chamber 45 amount best suited for supporting combustion with the combustion chamber, means closing the of the fuel being admitted to the stove. ' When it is desired to maintain a high fire, the valve 2l is opened sufficiently wide to provide the proper flame. The side walls of the shell 2 become thoroughly heated and the air flowing through the preheater becomes heated sufhcient ly hot that when mixed with the unheated air the fuel is readily vapcîrized and combusted. Should it be desirable to provide a large quantity of com 55 bustion supporting air, the shutter may be oper ated to open the inlets 5, thereby allowing greater draft through the inlet openings 5 and less through the preheater supplying the heated com 60 bustion air. If the supply of combustion sup porting air is to be reduced the shutter is regu lated so as to slightly close off the inlet open ings 5. , From the foregoing, it is obvious that I have provided a stove capable of burning fuel oils 85 throughout the full range of burner adjustment, for example from low fire to high fire according to the degree‘of heat desired. It is also obvious bottom of the air chamber and having a circu lar series of air inlet openings for admitting un heated combustion air to the air chamber, a damper controlling the effective port area of said openings, said shell having an air inlet opening located above the combustion chamber and below the fire-pot, a conduit supported -in heat conductive relation with the shell for sup plying heated combustiony air to the air chamber 55 through said opening, and means for supplying a fluid hydrocarbon fuel to the combustion chamber. - 5. A stove of the character described includ ing a shell, a fire-pot having its periphery fixed to the shell and provided with an opening in the bottom of the pot, means closing the bottom of the shell below the fire-pot and having a circu lar series of air inlet openings for admission of unheated combustion-air, a fuel bowl supported 65 by said closure, a combustion chamber having its upper end supported in the opening of the nre pot and its lower end supported in registering that the stove is of relatively inexpensive and simple'constructio'n and may be readily adjusted `relation with the fuel bowl and provided with 70 to efficiently consume any of _the lighter grade perforation's through which air is admitted to 70 the combustion chamber, a damper for con' fuel oils.l What I claim and desire to secure by Letters Patent is: 1. A stov'e of the character described including 75 a shell, an air chamber in the shell, means trolling the effective port area of said unheated combustion air inlet openings, means for admit ting a fluid hydrocarbon fuel to the fuel bowl, and means for supplying preheated combustion aisance air at a point below the ñre-pot for mixture with the unheated air. v ' - 6. A stove of the character ~described includ ing a shell, a fire-pot having its periphery fixed to the shell and provided with an opening in the `bottom of the pot, means closing the bottom oi the shell below the fire-pot and having a cir 4 sf# admitted 'to theccombustion chamber, a. damper for controlling the effective port area of said airinlet` openings, means for admitting a huid hy drocarbon fuel to the fuel bowl, means for sup plying preheated combustion air at a point below . -the hre-pot for mixture withy the unheated air, a flamel spreader supported in the fire-pot over cular series of air inlet openings for the admis- - 'the combustion chamber for spreading the flame sion of unheated combustion air, a fuel bowl sup ported by said‘closure, a combustion chamber having its uppeî end supported in the opening of the nre-pot and its lower end supported in registering relation with the fuel bowl and pro vided with perforations through which combus tion air is admitted to the combustion chamber, a damper for controlling the effective port area of said air inlet openings, means for admitting a fluid hydrocarbon fuel to the fuel bowl, means 'for supplying preheated combustion air at a point issuing from the combustion chamber into the fire-pot, and a. vaporizer in the fuel bowl and hav ing a deflector portion for directing vaporized fuel toward the inner periphery of- the combus tion chamber. . ß. A stove of the character described includ ing a shell, an air chamber in the shell, means 15 forming an air supply duct to the air chamber and located in heating relation with the shell, a guard connected with said means forming the air supply duct, a fuel supply tank carried by the ~ below the tire-pot for mixture with the unheated air, and a flame spreader supported in the flre pot ,over the combustion chamber for spreading the flame issuing from the combustion chamber and means connecting the' supply tank with the into the :dre-pot. burner. ' guard, and shielded from the heating effects of 20 the shell by the guard and the movement of air through said supply duct, a ‘burner in the shell, ° \ ' 7. A stove of the character described includ 9. A stove of the character described includ 25 ‘ing a shell, a nre-pot having its periphery fixed ing a shell, an air chamber in the shell, an >air to the shell and provided with~an` opening in the ' supply duct connected with the side of the shell bottom of the pot, means closing .the bottom of the shell below-the fire-pot and having a circular series of air inlet openings for admission of un for conveying combustion air in heat conductive relation with the shell to the air chamber, and a fuel tank supported from the shell in spaced re 30 lation with said supply duct, whereby the tank is heated combustion air, a vfuel bowl supported by said closure, a vcombustion chamber; having its >protected from the heating effects of the shell upper end supported inthe _opening of the fire-` incidental to movement of air through said duct pot and itslower end'supported in registering re to the .air chamber. ' lation with the fuel bowl and proyided with 85 perfor-ations through which combustion air is _Hmm n. musoN.