US2501207A - Gas burner head having peripheral secondary air supply - Google Patents

Description

March 1950 G. E. BURNS 2,501,207

GAS BURNER HEAD HAVING PERIPHERAL SECONDARY AIR SUPPLY Filed Sept. 29, 1948 2 Sheets-Sheet l INVENTOR. (2m W1 G. E. BURNS GAS BURNER HEAD HAVING PERIPHERAL SECONDARY AIR SUPPLY March 21, 1950 '2 Sheets-Sheet 2 Filed Sept. 29, 1948 INVENTOR.

ATTORNEYS Patented Mar. 21, 1950 GAS BURNER HEAD HAVING PEBIPHEML SECONDARY AIR SUPPLY Gordon E. Burns, Toledo, Ohio, aaaignor to The Columbia Burner Company, Toledo, Ohio, a

corporation of Ohio Application September 29, 1948, Serial No. 51,830

This invention relates to gas burners of the type intended more particularly for use in hot air and hot water furnaces.

In the use of burners of this type having closed top burner heads with peripheral slots for the discharge of gas, the flame curls over the burner top forming a substantially closed flame mantle thereover. This flame mantle is probably caused by air vacuum created between it and the burner top and prevents the admission of secondary air to the interior of the mantle resulting in poor combustion and poor heat distribution of the flame.

The primary object of the present invention is the provision of means for introducing secondary air to the burner flame in such a manner as to penetrate the flame mantle adj acent to the burner and admit air to the interior of the mantle, thus relieving the vacuum therein and permitting an outward separating or broadening of the flame discharge and at the same time getting air to the inside of the flame mantle to better support combustion and obtain the full heat distributing efliciency of the gas and flame.

Further objects and advantages of the invention will be apparent from the following detailed description and from the accompanying drawings illustrating one embodiment thereof, in which Fig. 1 is a top plan view of a burner embodying the invention; Fig. 2 is a section on the line 2-2 in Fig. 1; Fig. 3 is a section on the line 3-3 in Fig. 2; Fig. 4 is an enlarged top plan of the air distributing ring; Fig. 5 is an enlarged section on the line 5--5 in Fig. 4, and Fig. 6 is an en-. larged side elevation of the burner head.

Referring to the drawings, I designates a bumer head which in its present embodiment comprises a top plate or member 2 of substantially disk-form and a bottom member 3 secured together and cooperating to form a chamber 4. This chamber receives a primary mixture of gas and air through a central bottom throat 5 from a supply conduit 6.

The members 2 and 3 of the burner are joined at their rim portions by a plurality of screws I in a manner to provide a radial discharge slot 8 from the chamber 4 entirely therearound except for the interruption caused by the spacing means. This spacing means may constitute washers 9 on the screws 1 between the opposed flat rim faces of the members 2 and 3. The chamber l is provided with a supplemental top plate ll of shallow conical form to direct the gas mixture to the discharge slot 8. A screw ll through 8 Claims. (CL 158-116) the center of the top member 2 holds this plate in position.

For the purpose of the present invention, a ring I2 is attached to the under side of the marginal edge portion of the member 3 as by screws l3. Spaced bosses M on the top of this ring hold it spaced from the member 3 so that the ring cooperates with the bottom rim portion of the member 3 to provide a series of horizontally disposed segmental slots l5 entirely around the burner head.

Secondary air for supporting combustion of gas discharging from the burner slot 8 is supplied to the under side of the burner head around its throat 5 from a conduit I'I through a circular discharge slot l8, the area of which is controlled by the size of a ring IS in the discharge opening of the conduit, as shown in Figs. 2 and 3. Rings of different size may be used for this purpose. This air discharge is against the upwardly tapering bottom member 3 equally therearound and is deflected outwardly thereby partly around the ring I2 and partly through the slots I5, the inner ends of which are open to the under side of the burner head, while their outer ends open at the outer edge of the member 3.

The ring I2 is provided at intervals around its outer edge, preferably at the outer ends of the bosses I, with upstanding lugs 20, in the present instance equidistantly spaced and each provided at its outer side from its lower to its upper end with a vertical channel 2|, thus making the lugs substantially U-shape in cross-section. Each lug 20 is preferably spaced slightly outwardly from the peripheral edge of the head members 2 and 3 and extends above the line of discharge of the gas slot 8.

As the secondary air passes outward and upward around the ring l2, a portion passes up through the channel 2| in each lug and is directed into the space above a flame resulting from the ignition of the gas discharging from the slots 8, as indicated in Fig. 2. The provision of these channeled lugs extending from a point below to a point above the burner flame is found to be extremely important to the eflicient and economical operation of the burner. Such channels cause pencils of secondary air to penetrate the flame, which is of continuous ring-type, thus relieving any vacuum above the burner head tending to cause the flame to curl inward thereover and at the same time supplying the necessary secondary air to the upper side of the flame to effect proper combustion of the gas at such side.

While it is found in practice that the best re- 3 sultsareobtainedbyusingboththeairslotll andthechanneledlugs flassistinginthedistribution of secondary air to the flame, th latter are the more important to the eflicient operation of the burner and may be used alone if desired.

I wish it understood that my invention is not limited to any specific construction, arrangement or form of the parts, as it is capable of numerous modifications and changes without departing from the spirit of the claims.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

1. The provision on a gas burner having a gas chamber with a ring-type slot gas mixture discharge having substantially unrestricted communication with said gas chamber and a secondary air supply upward around its edge, of means for directing said secondary air vertically through the flame mantle of gas discharging from the burner slot, said means including an air directing lug located at the edge of said burner and extending upwardly transversely of the slot whereby air is projected upward through the flame mantle adjacent to the slot.

2. The provision on a gas burner having a ringtype slot gas mixture discharge and a secondary air supply upward around its edge, of means for directing said secondary air vertically through the flame mantle of gas discharging from the burner, said means includin a vertically channeled lug located at the edge of said burner and extending upwardly transversely of the slot whereby air is projected upward through the line of gas discharge from the burner slot adjacent thereto.

3. The provision on a gas burner head having a substantially continuous slot for the discharge of gas to be ignited and a secondary air supply upward around its edge, said slot discharge having substantially unrestricted communication with said gas chamber of a plurality of lugs extending vertically in circumferentially spaced relation past the outer end of the gas discharge slot transversely thereof and adjacent thereto and each disposed in the flow path ofthe secondary air and directin pencils of such air from a point below to a point above the slot and through the flame mantle.

4. An arrangement as called for in claim 3,

4 wherein said lugs have vertical channels through which the secondary air is directed.

5. An arrangement as called for in claim 3,

wherein said lugs are U-shape in horizontal cross-section. 6. In a gas burner having a surrounding gas mixture discharge slot and provision for discharging secondary air upward and around the burner edge adjacent to the discharge end of said slot, said slot discharge having substantially unrestricted communication with said gas chamber a member attached to the bottom edge of the burner below said slot and having a plurality of circumterentially spaced vertical lugs at its outer edge extending from below to above said slot and serving to direct the secondary air above a flame mantle of discharging gas.

7. An arrangement as called for in claim 6, wherein said member is spaced at intervals from the bottom edge of the burner to which said member is attached to permit the directing of secondary air between the member and burner edge to a point adjacent to the gas discharge slot.

8. In a gas burner having a horizontally disposed surrounding gas mixture discharge slot and provision for discharging secondary air upward around the bottom portion of the burner to adjacent the outer end of said slot, 9. rin attached to the bottom edge of the burner in spaced relation thereto to provide air discharge slots between the ring and burner edge, said ring having a plurality of circumferentially spaced lugs at its outer edge extending from a point below to a point above said gas discharge slot, said lugs being vertically channeled at their outer sides to direct pencils of secondary air through the discharge from the burner slot.

GORDON E. BURNS.

REFERENCES CITED UNITED STATES PATENTS Name Date Heckel et a1 Aug. 2, 1927 FOREIGN PATENTS Country Date Great Britain June 20, 1924 Number Number

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