US2297762A - Gas burner - Google Patents

Description

P. S. HARPER GAS BURNERS Filed March 4, 1940 2 Sheets-Sheet 1 III" ' INVENTOR. PMZ Q flficzrpa BY ATTORNE 5 1942- P. s. HARPER 2,297,762

GAS BURNERS 7 Filed March 4, 1940 z Sheets-Sheet 2 INVENTOR.

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ATTORNEY 5- iTEo STATE GAS BURNER Philip S. Harper, Chicago, 111., assignor, by direct and mesne assignments, of one-fourth to Philip S. Harper and one-fourth to Carolyn L. Harper, both of Chicago, Ill., and one-fourth to Harris Trust and Savings Bank, an Illinois banking corporation, as trustee of the Philip S. Harper trust, and one-fourth to said Harris Trust and Savings Bank, as trustee of the Carolyn L. Harper trust Application March 4, 1940, Serial No. 322,062

Claims.

The present invention relates to-novel burner constructions, and-more in particular to multiple type burners for gas stoves and the like, embodying novel means for lighting said" burners or cross-lighting between the said burners.

Among'the objects of the present invention is to provide a novel burner of the multiple burner.

type characterized by the incorporation of novel means for effecting cross-lighting between the said burners.

Among the problems involved in the manufacture of burners'of the type herein contemplated are those relating to the burner efliciency, the ease of manufacture, the arrangement of the said burner elements to provide for supplying the necessary secondary air supporting combustion, and the design of the said burner to facilitate its manufacture at low cost. Considerable thought and attention have been directed to the manufacture of these burners so as to secure I increased efficiency by proper design of the burner elements, and the location of the burners in respect of one another. In the constructions herein comprehended, the normal location of the burners in order to secure the efficiency desired, does'not permit direct cross-lighting of the said burners, and it is accordingly necessary to provide some auxiliary means to bring about this condition. Heretofore in the construction of these burners, one of the principal factors involved has been the disposition of the burners in respect to one another for maximum burner efliciency with very little attention being given to the question of cross-lighting other than to provide such a means without regard to its relation to the burner construction in respect of increased manufacturing costs due to more complicated designs, addition of parts or elements, and the increased labor involved in assembling the same.

The present invention therefore has as one of its principal objects the provision of a multiple type burner characterized by embodying within v its structure novel means for effecting crosslighting between the said burners and being of simplified design requiring a minimum of parts and manufacturing steps, thus greatly decreasing manufacturing costs, yet providing for the eflicient cross-lighting of the burners without in any way affecting their normal operating efficiency. l

The invention has proceeded upon the theory of providing a novel cross-lighting means for the burners which may be embodied in the burner assembly in such a way as to greatly simplify their design, yet being so constructed and arranged that the same will not clog and may be readily cleaned when desired.

Still a further object of the present invention is to provide a novel burner of the multiple burner type embodying in its construction novel means for cross-lighting, comprising flame propagation means communicating with gas conducting chambers of the said burners and being disposed in flame igniting relation to the said burners and to each other. More particularly, such novel structure for the cross-lighting means may be constituted by adjacently disposed slots or openings in the walls of the said chambers, so disposed in relation to one another and to the said burners that flame propagation may be effected between the said burners.

Still a further object of the present invention is to provide a novel arrangement for the flame propagation means whereby flame may be propagated effectively and efficiently to effect crosslighting of the burners, as desired. Such an assembly therefore contemplates an arrangement of the said flame propagation means with due regard for the burner design and the secondary air requrements for the said flame propagation means to assure proper travel of flame along the same. In the illustrative embodiments selected to disclose the invention, the said flame propagation means may include a slot or openings in communication with one of the gas conducting chambers for one of the burners disposed adjacent an unrestricted passage for the movement of secondary air.

The present invention also contemplates a novel construction and arrangement for the said flame propagation means with respect to at least one of the said burners whereby flame propagation may be properly effected between the same and said burner even though obstructions in the form of an abutment or overhanging ledge, are interposed therebetween in accordance with burner design requirement or for burner efiiciency and the like.

Still another object within the purview of the present invention is to provide means in combination with the structures hereinabove described whereby lighting of said burners may be effected from a flame remotely positioned with respect to the said burners.

Other objects, features, capabilities and advantages are comprehended by the invention, as will later appear and as are inherently possessed thereby.

Referring to the drawings:

taken in the plane represented by line 3-3 of I that figure;

Figure 4 is a fragmentary view in cross section taken in the plane represented by line 4--4 of Figure 2 of the drawings; v

Figure 5 is a top plan View of a burner device embodying a burner head of modified construction;

Figure 6 is a bottom plan view of the burner head shown in Figure 5;

ing across the annular chambers 28 and 30, the said bridging web or wall being of segmental formation, as disclosed in the drawings, and being defined laterally by the marginal upstanding walls 44 and 46, which merge with the walls 22, 24 and 26. I

The burner head is secured to the base 4 therefor by means of a plurality of bolts or the like 48 engaging in aligned openings provided in the annular flange 38 and the opposed flange of the said base 4, it being observed that when the burner head is connected in the position disclosed in Figure 1, as by means of said bolts or screws, that the annular walls 22, 24 and 26 and Figure 7 is a view in cross section taken in the plane represented by line 7-7 of Figure 6;

Figure 3 is a view'in cross section taken in'the plane represented by line 23-43 of Figure 6; and

Figure 9 is a fragmentary view in cross section taken in the plane represented by line 9-9 of Figure 6.

Referring now more in detail to the drawings, a burner head embracing the present invention and selected to'illustrate the same is generaily referred to as 2, and is disclosed in Figure 1 of the drawings'in operative association with a'burner base 4 which is one of a group or battery oi such burners which may be used in a burner device for gas stoves or the like. The base i of the burner device of Figure 1 comprises essentially two concentrically arranged gas conducting chambers, such as i and communicating by way of suitable ducts iii and i2, respectively, with a valved gas supply and with the said burner 2 which incorporates improved structure in accordance with the present invention. 0peratively associated with a battery of such burners is a pilot light l4, supplied with gas through valved jet i5 and with which is associated a plurality of flashtubes, such as l8, each of which may be mounted as disclosed within a bracket such as 29, on one of the gas conduits and connected to an individual burner head, as will be hereinafter more fully described.

The present invention is directed more in particular to the construction of the burner head 2, with special provision for cross-lighting between the two burners provided on the head. In the illustrative example of Figures 1 to 4 inclusive, the said head is preferably of integral construction, formed by way of a casting to provide the concentrically arranged upstanding walls 22, 24 and 26, providing therebetween. the annular gas conducting chambers 28 and 30, the said upstanding walls being bridged or connected adjacent their top by a concave or dished web 32. The-web or wall 32 terminates along its upper marginal edge with the wall 28 and at its lower marginal edge with the upstanding wall 22, thus providing a flue at the center of the burner defined in part by the annular wall 22.

The outer upstanding wall 25 is slightly tapered from its lower end toward the top and is provided with an annular shoulder 36 for a purpose to be hereinafter more fully described. This upstanding wall 2% is further provided at its lower end with an annular laterally extending flange reinforced by a plurality of pillars iii suitably positioned around the same. 7 The head further embodies in its construction a bridging or connecting web or wall 42 axially ofifset as at 43 at its junction with wall 26 and extendthe radially disposed walls 44 and 46 are disposed in abutting relation to complementary walls of the said burner base whereby the chambers 28 and 30, together with the chambers 6 and 8, form completely enclosed conduits communicating-with the conduits l0 and I2, respectively, for the passage of gas to the burner head.

The formation of the burner head as disclosed above provides for the efiicient operation of two burners, the inner one of which is formed asby way of a plurality of burner ports 50 extending into communication with the chamber 28 at the junction of upstanding wall 22 and connecting wall 32, this burner arrangement being in close association with the flue 34 formed by upstanding wall 22, and being used as a simmer burner in the particular burner device herein disclosed. The main burner is provided by way of a plurality of burner ports 52 extending through upstanding wall 26 adjacent the shoulder 36 in communication with chamber30.

With particular reference to the design for the burner head above described, and with respect to the location of the burner ports 50 and 52 relative to one another and the other associated elements of the burner design, it has been found that efiicient operation of the burners is attained. However, the arrangement is such that it is impossible to cross-light directly from one of the said burners to the other, and the particular improvement contemplated by the present invention relates to novel means for efiecting this cross-lighting between the two said burners.

Such means in the illustrative embodiment of Figures 1 to 4 inclusive is constituted by an elongated slot 54 formed in the connecting web 42 in communication with the annular chamber 28 and which may terminate at each end in enlarged orifices or ports 56 and 58 oppositely disposed to one another, the former being in opposed relation to the open end of the flash tube i8 and the latter of which is disposed in flame igniting relation to the burner ports 50. The said cross-lighting means further includes an elongated slot Gil formed in part in the connecting web 42 and in part in the upstanding wall 2%, the said slot terminating in the said connecting web 42 in flame igniting relation to the orifice 5G, and at its other end in flame igniting relation to one or more of the burner ports 52. In order to facilitate flame propagation or travel along slot 68 upwardly to the burner ports 52, it has been found desirable to dispose the said slot in wall 26 in inclined relation with respect to the axis of the burner head and to curve or round the edge 6| at the junction of the bridging web 52 and wall 26, and tofurther provide a suitable passage or opening for supplying secondary air thereto. This latter requirement is fulfilled by the provision of the opening 62 defined in part by the said curved or rounded edge I mer burner ports 50.

8| and in part by the spacedlugs 84 and 66 provided with the depending flanges 85 and 81, respectively. These flanges 65 and 51 further proflash tube I8 whereit is ignited by pilot light I4 and which likewise causes the ignition of the gas discharged through the slot 54.v ,T'he

flame then travelsgalong this slot and will ignite the gas being discharged through the simofthe same valve, or anothervalve, combustible gas may be introduced into the chamber 30 of the burner head and is discharged through the slot 60 .where it is ignited by the flame at slot 04 and jet 56. This flame then travels upwardly to the burner ports 52 to ignite the gas being discharged therefrom. n

Although cross-lighting has been effected before in burner devices of the type herein described, nevertheless such means as have been provided in the past have increased the cost of manufacture and have seriously interfered with manufacturing, procedures, particularly where the burner heads are of cast construction. According to the present invention, no auxiliary elements or parts need be incorporated in the burner heads to effect the cross-lighting between the burners, thus greatly simplifying the manufacture of these burner heads and the manufacturing processes by which the same are made. Embodiedin the simplified construction are the .two slots communicating with the annular gas conducting chambers, andwhich are in flame igniting relation one to the other, as well as with simmer and main burnerports, whereby cross lighting can be effected. According to this simplified construction, the simmer and main burner ports can be located for maximum burner efficiency. I 1

The principles involved in the constructions shown in Figures 1 to 4 inclusive may be readily embodied in burner heads of multi-part construction, as more particularly exemplified in Figures 5 to 9 inclusive, which figures disclose one of a plurality of embodiments in which the cross-lighting means of the hereinbefore described embodiments may be incorporated. In this embodiment selected to further illustrate the invention, the burner head I2 is constituted by two parts I4 and I6 secured together by way of one or more bolts or screws 18 and which assembled burner head may be incorporatedin a burner device such as disclosed in Figure '7, comprising a group or battery of burner bases 80, each of which is formed with radially spaced gas conducting chambers 82 and 84, which may communicate with gas conducting conduits 80 and 88, respectively, leading to a source of combustible gas controlled by suitable valve mechanism.

As in the previous illustrative embodiments of .the invention, a pilot light 90, controlled by valved Jet 92, may be provided substantially centrally of the group of burners, and which pilot light is in association withthe ends of a plueach of the burners of the group and which maybe mounted upon gas conductors as by way of the spaced brackets 88 and 98.

The part 18 of the burner head is of integral construction and is formed in part by the radially spaced upstanding walls I00 and IIII integrally connected by a'bridging or connecting wall or web I02 to form in part anannular auxiliary or simmer burner gas conducting chamber 1 I03 therebetween. Said part 18 is further formed with a curved or dish-shaped wall I04-overhanging wall I00 and forming in part a main gas conducting chamber I05. Walls I00 and I04 extend partially around the head and merge with the radiallylextending end walls I05 and III! of a manifold I08 which provides means for introducing gas into the burner head.

.This manifold further includes the radially Upon further operation from-' the chamber 82.

spaced walls I08 and, III] forming in partthe manifold chamber I II therebetween which communi cates with the main g'as conducting chamber I05. This manifold is further provided with spaced openings I I2 and H3 separated byway of a wall II4 extending betweenwalls I09 and M0 for reinforcing said manifold, and the said openings providing means for, communicating with the manifold chamber III for introducing gas therein and to the saidchamber I05 from the chamber 84. The said connecting wall I02 at the manifold I08 is provided with the spaced openings H5 and Ill whereby gas can be introduced into the said auxiliary chamber I03 As will be clearly apparent from the drawings, the manifold I08 is of such a construction as to seat upon the base 80 wherebythe openings H2, H3 and H5 and III are in proper communicating. relation with the chambers 84 and 82, respectively. The head I2 is secured to said base 80 by means of bolts or the like registering in openings I23 and I25 formed in ears I21 adjacent the ends of the openings Iii and H2 and I2% and I3I, respectively, formed in base 80.

, H8 is provided adjacent its lower end with an rality of flash tubes 84, one being used for 7s enlarged part I22 disposed to abut with walls I00 and H0, and which enlarged part terminates in a downwardly depending annular wall I24 disposed to have end abutting relation with the wall IOI, whereby a vertical inner flue I25 is provided which merges with the lower end of an annular inclined surface I28, and which surface is provided with a plurality of burner ports I30 extending into communicating relation with the chamber I03. The opposed wall H8 is provided with a depending annular flange I32 fitting within the walls I04 and I09 and adjacent which is an annular ledge or flange I34 overhanging the adjacent abutted end of walls I04 and I09, the said wall I I8 being further provided between wall I20 and annular ledge I34 with a plurality of outwardly extending burner ports or jets I38 communicating with the main gas conducting chamber I05.

According to the embodiment disclosed, the enlarged part I22 seats with a metal gasket I38 disposed between the same and the adjacent walls I00 and H0 for sealing the joint between the two parts I4 and 18 when the screws or the like 18 are tightened.

Flame propagation may be effected between the lighting of the outer burner.

the pilot light 90 and the simmer burner ports when gas is introduced into auxiliary chamberv I03 by a slot I40 provided in the walls I00, IOI and I02 which may terminate at one end in orifice or jet I42 in flame igniting relation to the simmer burner orifices I30, and at its other end in a jet or orifice I44 disposed in opposed relation to the flash tube 94. In order to eflfect a cross-' lighting between the simmer burner and the main burner, part I is further provided with a slot I46 formed in the wall I04 and terminating at one end in flame igniting relation to the orifice I49 which in turn is in flame igniting relation to the orifice I44, and at its other end in enlarged orifice or jet I48 disposed to emit a jet of flame beyond the ledge I34, whereby flame may be propagated to the main burner ports I36. By disposingthe slot I46 in angularly displaced relation to the slot I40 the flash tube 94 may be brought into efi'ective operative association with said slot I40 without interfering in any way with In order to effectuate flame propagation between orifice I44 and the slot I46 the saidorifice I49 is provided intermediate the same whereby the lighting of the outer burner can be easily and readily accomplished.

As in the previously described embodiments,

, novel means for cross-lighting between the burners is incorporated in the multi-part burner construction to provide a simplified design with a minimum of parts which can be readily and easily manufactured at low cost and without affecting in any way the efllciency of the said burners.

While I have herein described and upon the drawings shown illustrative embodiments of the invention, it is to be understood that the invention is not limited thereto, but may comprehend other constructions, arrangements of parts, details and features without departing from the spirit of the invention.

I claim:

1. In a double burner construction, the combination of a burner member having inner and outer noncommunicating gas chambers, each adapted to be connected to an independently controlled source of gas supply, said burner member having a series of inner gas ports in communication with said inner gas chamber, and a series of outer gas ports in communication with said outer gas chamber, in which said inner and outer series of gas ports are disposed so that the flames from one of said series of gas ports will not directly ignite the gas emerging from said other series of gas ports, a pilot light, and a flash tube extending from a point adjacent said pilot light to a point adjacent said burner member, a flash tube feeding port spaced from said two series of gas ports and communicating with one of said gas chambers and disposed to projectgas into the adjacent end of said flash tube, gas outlet means in said burner member communicating with said inner gas chamber and constituting a flame propagating means for igniting said inner series of gas ports from said flash tube feeding port, and gas outlet means in said burner member communicating with said outer'gas chamber and constituting a flame propagating means for igniting said outer series of gas ports from said flash tube feeding port.

2. The construction defined in claim 1 further characterized in that the flash tube feeding port is disposed in communication with the inner gas chamber.

3. The construction defined in claim 1 further characterized in that the gas outlet means communicating with said outer gas chamber is disposed to propagate a flame along a path which is at an angle to the vertical whereby the respective portions of said propagated flame have free access to secondary air of combustion.

4. The construction defined in claim 1 further characterized in that the gas outlet means communicating with said outer gas chamber is a slot formed in the wall of said chamber.

5. The construction defined in claim 1 further characterized in that the gasoutlet means communicating with said outer gas chamber is a diagonally disposed slot formed in the wall of said gas chamber.

PHILIP S. HARPER.

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