US2376520A - Burner - Google Patents

Description

May 22, 1945. H. D. STERlK BURNER Filed July 5, 1941 INVENTOR. MAW I 45. U cWw' WITNEJGBS WWW- 7/ 4 PM...

- ATTORNEYS. I

Patented May 22, 1945 UNITED STATES PATENT OFFICE BURNER Harrison 1). Sterick, Pittsburgh,Pa. Application July 5, 1941, Serial No. 401,662

6 Claims.

tion of the gas, which is quiet in operation, and g which is simple and inexpensive in construction.

In accordance with this invention a hollow base member to which gas is supplied is composed principally of laterally spaced hollow horizontal arms having open tops. The open top of this base member is covered by a burner plate provided with laterally spaced arms that overlie the arms of the base member. .The outer ends of the arms preferably are widened or flared laterally so as to form between them vertical fluelike passages for combustion air, and these passages may be restricted by flanges projecting into them from the base member. The sides of the arms of the plates are provided with vertical burner slots the lower ends of which open into the hollow arms of the base member whereby gas issues from the base member through the tops and sides of these slots. The top of each plate arm is provided at its sides with upright ribs that form between them channels for combustion air that is thus better able to flow between the two rows of jets along the sides of the arms. As the burner is adapted to be closely surrounded by a casing the ends of the arms preferably are recessed to provide vertical passages between them and the casing up through which air can flow to the outer ends of the air channels on top of the arms and then inwardly through those channels.

The invention is illustrated in the accompanying drawing in which Fig. lis a plan view of my burner with the burner plate partly broken away to show the supporting base member; Fig. 2 is a bottom view of the burner with the base member partly broken away to show the bottom of the burner plate; Figs. 3 and 4 are vertical sections taken on the lines IIIIII and IV--IV, respectively, of Fig. 1; Fig. 5 is a fragmentary bottom view of a modified burner plate arm;

and Figs. 6 and 7 are top and bottom views, respectively, of a rectangular burner plate.

Referring to Figs. 1 to 4, a hollow base member I is provided in the center of its bottom with a circular opening encircled by a downwardly extending flange 2 adapted to receive and be supported by a mixing tube (not shown) through which gas and primary air are supplied to the l burner.

Radiating from the center of the base member are a plurality of 'circumferentially' spaced arms 3 that are open at the top and that communicate at their inner ends with the central opening in the base so that gas can flow into the arms. The outer ends of the arms flare laterally, as shown in Fig. 1, so that they'approach each other to form flue-like vertical passages 4 between them for the secondary air used in combustion. In order to prevent the upward rush of air through these passages from making the burner roar and from carrying the flame too far above the burnenthey preferably are reduced in size by flanges 5 projecting into them from the bottoms of the arms.

To break up the gas into many jets for burning, a burner plate I is .mounted on the base member. This plate is of the same general shape as the base so that it completely covers and closes the open top 'thereof. The central portion of the plate is solid and from it a plurality of circumferentially spaced horizontal arms 8 radiate. Substantially oval air openings ID are formed between the arms of the plate in registration with the air passages 4 of the base. The plate is detachably connected to the base by bolts 12 extending through radial slots l3 and M in the outer ends of the plate arms and the bottom of the base, respectively. To avoid having bolt openings through the base arms 3, which would require a seal, the outer end of each base. arm is concave to provide room for a bolt-receiving slot M in a flange beyond its end.

The burner jets are formed by providing the sides of the plate arms 8 with series of laterally spaced vertical slots It. The lower ends of the slots extend inwardly far enough to cause them to open into the underlying hollow arms of the base member, as shown in Fig. 4, while the upper ends of the slots preferably, but not necessarily, extend through the upper surfaces of the arms. The slots are thus generally wider at their bottoms than at their tops and have an open side directed into the air passages between the arms. It has been found in practice that'the gas issuing from such a' slot divides itself into two jets, one rising from the top of the slot while the other issues from the open side of it. 1 The air drawn upwardly through the vertical passages between theburner arms thoroughly aerates the gas jets on the side adjacent the passages. To assure suificient secondary air for the opposite side of the jets each arm of theburner plate is preferably provided along the top of its sides with upright ribs ll that form between them an inwardly extending open-top air channel. The burner slots may extend up through these ribs, although that may not be desirable in the case of cook stoves where food might fall into the tops of the slots. Air rising past the ends of arms 8 passes inwardly across the top of the plate arms in the channels formed between ribs l1 and mixes with the gas issuing from slots I6. As this burner is intended to be closely encircled -by a cylindrical casing, indicated by the broken number of jets of a burner so that substantially' the maximum amount of gas can be burned in a' burner of a given size. In other words, I am ableto burn with a six-inch burner the same amount of gas in a given time as a prior 'art burner of a much larger diameter. Also,'-I am able to increase the vertical height of the flame issuing from my burner so as to exceed heights of flames in other burners, while effecting the complete combustion of the gas being burned. The ordinary star type gas burner can not be turned up to have a flame more than a few inches high without the tops of the flame turning yellow which clearly indicates lack of complete combustion. On the other hand, I am able to turn the gas up quite high on my burner with resulting ly adapted to be used in a hot water furnace, heater, boiler or the like. For some manufactured gas it is desirable to provide the bottoms of burner plate arms 8 with ribs l5 which project down into the arms 3 to prevent the flames from flashing back into arms 3. There may be a pair of ribs 15 below each arm 8, or the space between the ribs can be filled in so that only one flames considerably higher than several inches,

all without resulting in the yellow flame of incomplete combustion.

The efiiciency of this burner is very high because of the thorough mixing of secondary air and gas. The vertical oval air passages between the burner arms form separate air stacks around each of which is a border of gas jets. Additional air stacks are formed above the burner arms by the air that passes inwardly across the burner between ribs Each series or rOW of jets is thus blanketed on both sides by plenty of air so that substantially complete combustion of the gas is assured. Furthermore, the several separate stacks of air prevent the tongues of flame from uniting and becoming insufficiently aerated. The result is high efliciency and practically no soot formation even when the burner is turned very high. It burns with many tall, blue, clean flames.

In the modification shown in Fig. 5, the lower ends of some of the jet slots 2| in the burner plate arm are connected by slots 22 extending across the bottom of the arms.

In the embodiment of Figs. 6 and 7 the burner is of general rectangular shape and may be of any desired length or width. Otherwise the construction of this plate is substantially the same as the one first described. The burner plate arms 26 form between themselves oval openings 21 for the upward flow of secondary air. The top of the plate is provided at the sides of the arms with ribs 28 that form air channels, and the sides of the armssurrounding'the vertical air passages 21 are provided with vertical slots 29 for the gas that is delivered to them from a hollow burner base (not shown) corresponding in shape to the plate. As shown in Fig. 7, the lower ends of the burner slots may be connected by cros slots 30. Here again the various series of flame jets are separated by upward streams of air that mixes withthe gasfor excellent combustion.

It will be appreciated that the principles of my invention can be incorporated in a burner of substantially'any size or shape and adapted to substantially any use. Also, I contemplate employing the improved features of my invention in burners adapted to burn substantially any fluid fuel. However, I am particularly -interested .in providing an improved burner for natural or artificial gas and a burner which is specificalwide rib is formed. Likewise, these ribs may be integral with burner plate 1 or separate therefrom with the burner plate resting on them.

According to the :provisions of the patent statutes, I have explained the principle and construction of my invention and have illustrated and described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

1. A gas burner plate having a plurality of spaced horizontal arms, the sides of said arms being provided with vertical burner slots several of which communicate at their lower ends with gas-conducting slots extending across the bottom of the arms.

2. A gas burner plate having a plurality of spaced horizontal arms, the top of said arms being provided at their sides with upright ribs that form between them an inwardly extending opentop air channel, and said sides being provided with laterally opening burner slots extending upwardly therethrough.

3. A gas burner plate having a plurality of,

spaced horizontal arms, the top of said arms being provided at their sides with upright ribs, and said arms being provided with laterally opening burner slots extending vertically through said sides and ribs.

4. A gas burner comprising a hollow base member having a plurality of circumferentially spaced radiating horizontal arms with open tops and provided in its bottom with a central gas inlet, the outer ends of said arms being widened to form flue-like vertical air passages between the arms, flanges projecting into said air passages from said arms'to restrict the size of the passages ior secondary air, and aplate having radiating arms covering said open top base member arms, the sides of said plate arms being provided with vertical slots the lower ends of which open into said hollow arms.

5. A gas burner comprising a hollow base member having a plurality of circumferentially spaced radiating horizontal arms with open tops and provided in its bottom with a central gas inlet, and a plate having radiating arms covering said open-top base member arms, the sides of said plate arms being provided with vertical slots the lower ends of which open into said hollow arms, and ribs projecting down into said hollow arms from between the lower ends of said slots.

6; A gas burner plate having a plurality of spaced horizontal arms, the tops of said arm's being provided at their sides vw'th upright ribs, and said arms being provided with laterally opening burner slots extending vertically through said sides and ribs and several of which communicateat their lower ends with gas-conduct- HARRISON D. STERICK. I

Images