US2840150A - Gas burner of multi section port construction - Google Patents

Description

June 24, '1958 A. c. JACKSON ETAL 3,840,150

GAS BURNER 0F MULTI SECTION PORT CONSTRUCTION Fil ed May '7, 1953 s E w I 1 g I E? INVENTOR 14% q- Alonzo 0. Jackson a S N Francis E. Jackson \E fi r John A. Lasofer m6 Q BY ATTORN Y 2,840,150 GAS BURNER F MULTISEQCYTIION oRT Application 7,1953, Serial No. 353,487 I Claims. (Cl. %114) This invention relates to gas burners and has specific reference to such a burner fabricated of individual port sections (preferably formed of pressedsteel) .secured together'into an integral structure that is aluminized following final assembly.

This novel burner organization has special application in (but is not restricted to) the gas-fired house heating unit di'scl osedin copending' application Serial 5N0; 282,651, filed April 16, 1952,'u nder the title of House Heating Unit land 'Automatic ControlT-herefor, now Patent No. 2,700,505. In heatingunits of this type wherein several burners of varyingcapacitiesare employed, it is essential, in order to meet competition, that the burners be extremely economical to manufacture yet highly eflicien't and durable in operatiorilf The novel burner 'herein'fdisclosed meets these: requirements with an extremely high degree of satisfaction.

It is the generalobject of this invention to provide, a gas burner that is very low in first cost, readily adaptable to manufacturing processes, and yet highly eflicient and durable in operation. '7

area relative to' that of the chamber for the passage of anair-gas mixture from the interior of the chamber. To

assist in maintaining the proper spacing between edges 16 and to giverigidity to the structure these edges are provided with inwardly formed portions 19 that are held together by bending clip 21 formed on one of the portions over the rim of the other portion. I

Each of the walls 12- of eachport section is formed with an outwardly projecting circular portion or'rim 20 having an opening 22 provided therein. When the several sections 10 that make up a complete burner are in assembled relation circular portions 20 of adjacent walls of adjacent sections are-in abutting relation andaresecured together in a fluid tight manner by crimping the edge forming opening 22 in one wall over the edge forming the opening in the immediate adjacent wall, as clearly shownin Fig. 1.

The opening 22 formed in the endmost wall of one of the end sections is sealedby sheet metal member 24, held within said opening by a force fit, while the opening in the endmost wall of the other section is connected to inlet duct 26 in a-fluid tight manner; the extremity of the duct being crimped over the edge of the opening for this purpose.

Positioned within port sections 10 and extending through theopenings 22 is a suitable baffle 28, illustratively shown as a helical plate, effective to give an even velocity distribution to each of the port sections of the air-gas mixture entering the assemblage of sections through inlet duct 26.

In fabricating the burner it is unnecessary that the numerous joints be welded since, with the pressures at I which these burners operate, an entirely satisfactory seal A further object is to provide a gas burner fabricated entirely of pressed steel that is aluminized following final assembly and 'that has individualportsections which may be built up as desired to obtain, anecessary burner capacity. 7 i e Other and further objectsQof the invention will become apparent to those skilled in the art' asthe description proceeds. I v 7 With the aforementioned objects in view, the invention comprises an arrangement, construction and'com'bination of the elements of the gas burner in such a manner as to attain. the: results desired as hereafter more particularlyset forth inlthe following detailed description of an illustrative embodiment; said embodiment being shown by the accompanying drawings wherein:

Fig; 1 is a longitudinal sectional view of the novel burner organization disclosingth'e interconnection of the individual port sections and the disposition of the helical bafile within the port sections. a

Fig. 2'is a sectionalview taken*along line 2-2 of Fig. 1.

Fig. 3 is a plan view of a number of the individual port sections of the burner taken generally along line 33 of Fig. 1.

Referring to the drawings, wherein like reference characters are used throughout to designate like elements the novel burner is made up of a plurality of individual port sections 10 rigidly secured together to form an integral structure. Each of these sections has a generally V-shaped transverse section (Fig. 2) and is made up of two parallel, pressed steel walls 12 having their outer edges bent toward each other to define a chamber intermediate the walls. The lower or side edges 14 of the walls of each section are in overlying relation with one of these edges crimped over the other in a fluid tight manner as clearly shown in Figs. 1 and 3. The top edges 16 are maintained in spaced relation to define an elongated slot 18 of restricted is obtainable with the crimped type of joint disclosed. It is thus evident that this burner is readily adaptable to relatively inexpensive manufacturing processes and can be produced extremely rapidly at a very low cost.

By building the burner of individual port sections great flexibility in capacity is provided since the capacity of a particular burner is obviously dependent upon the number of port sections of whichit is composed. Thus, in providinga heating unitwith burners of different capacities, such as. disclosed in the aforementioned application Serial No. 282,651; each of the burners can be identical except for the number, of port sections. This tends to simplify the installation and reduces the number ofdifferent parts contained within the unit resulting in lower first cost as well as lower operating costs.

During the manufacture of this burner, the port sections 10 and 12 are first stamped from sheet stee1;.these section plates arejoinedtogether centrally at 22 in Fig. 1 and the required number of section assemblages are secured together at 14 and 21, following placement of distribution bafile 28 in the port assemblage plus attachment of; airgas mixing tube 26 to one end thereof and of end plate 24 to the other assemblage end; and all of these burner parts thus assembled are aluminized both inside and out by precleaning and then dipping into a bath of molten aluminum. In this way all surfaces of the entire burner (including plate edges, etc.) are effectively coated with the aluminum.

V Patented Jun v ties of the aluminized surface.

In fabricating the burner pressed steel, aluminized following burner, assembly is preferably ernployed because of its relatively low cost and the extremely satisfactory results that havebeen obtained by its use. Inthe aluminizin'g process the base metal forms'anironf aluminum alloy witha coating of purealuminurn being depositedon the surface of the'met-alfl Withthis material it has been found that the ability of the burner to with- During operation of this novel burner an air-gas mixture enters the assemblage of portsection through inlet duct 26. This mixture receives 'a swirling motion by baflle 28' which evenly distributes it to each ofthe charm:

The mixture then bers defined by the port sections. 7 passes from each of saidchambers through; slots 18 Ma substantially uniform velocity, immediately thereafter mixes with secondary air, and burns with a short. even flame; v j

, While a preferred embodiment of the gas burner has been illustrated and described it isto be understood that f such is merely illustrative and not restrictive and that variationsj'and modifications may be made therein without departing from the spirit and scope of the invention.

It is therefore to be understood that the invention is not sections including a pair of generally V -shaped, parallel,

aluminized sheet metal wallshaving their edges bent M toward each other therebyforming a chamber with the edges of said walls forming thetop of the V being spaced to form a slot of restricted section relative to that'of the chamber for the egress of gas 'and the remaining edges being secured together in a fiuid tight manner by crimping one edge over the otherg the outlet edge of the slots formed in the severalsections being coplanar, said sections 'being disposed with their wallsparallel to one another with adjacent 'walls of adjacent sections being spaced and together with the end wall to which the inlet duct is secured having aligned' openings, an outwardly raised rjm formed about each of said openings with the rims formed on adjacent walls of adjacent sections being secured together by having onerim crimpedover the other; and a spiral baflle positioned within said unit and extending through the aligned openings operable to evenly distribute to each of the" sections thegasentering the unit-through the inlet duct, said baflle being of a width substantially equal to the, diameter of said openings.

planes and having a common transverse axis, each of said sections including a pair of dished generally triangularshaped sheet metal walls facing one another and secured together along two of the edges of the triangle by crimping the edge of one wall over the edge of the other thereby forming a chamber between the walls, the third edgeof the triangle being spaced to form an elongated slot of restricted section relative to that of the chamber for the egress of a gaseous fuel from the chamber, each ,of said walls having outwardly raised surface located intermediate said two edges and adjacent the apex formed 'by the juncture of said .two edges with this surface of adjacent sections being in abutting relation thereby spacing the major portion of adjacent walls of adjacent sections fromfeach other providing a passage for the free flow of air, said abutting surfaceshaving aligned openings formed therein with the rim of one opening crimped over the rim of the adjacent opening, one of theendmost walls having an inlet opening, an inlet duct coaxial with said openings and having its downstream end crimped over the rim of the opening in saidendmost wall, and battle means extending through said aligned openings and operative to evenly distribute the fuel to the several sections. p

3.,A gas burner as defined in claim 2 wherein the bafiie comprises a spiral metallic member having a width "substantially equal to the diameter of the aligned openingsv 41A gas burner comprising in combination a plurality of sheet metal sections disposed inparallel spaced apart planes, each of said sections including a pairof sheet metal plates facing one anotherand dished toform a chamber therebetween, these plates being secured together along all but a portion. of their perimetrical edges by crimping the edge of one plate over the edge of the other, said portions of said edges beingspaced to form a slot for the egress of gaseous fuel from the chamber, an inlet duct connected'to one of the endmost plates,adjacent plates of adjacent sections being spaced with the sections being in communication with each other through openjings in said adjacent plates with the openings being in alignment, an outwardly raised rim formed about at least one of the openings in said adjacent plates with said adjacent plates being secured together by having the rim of one opening crimped over that of the other, and battle means extending through said aligned openings and operative to evenly distribute the fuel to the several sections.

5. A gas burner as defined in claim 4 wherein the baffie comprises a spiral metallic member having a width substantially equal .tothe diameter of the aligned openings.

References Cited in the file of this patent UNITED STATES PATENTS 392,211 Lutz Nov. 6, 1888 :1,988,217 Sayles Jan. 15, 1935 2,646,842 'Handley July 28, 1953 FOREIGN PATENTS 4,546 Great Britain 1901

Images