US1506168A - Gas burner - Google Patents

Description

C. K. ERIKSTRUP GAS BURNER Fi led Aug. 29. 1923 'iil Patented Aug. 26, 1924.

UNITED STATES CHRISTEN K. ERIKSTRUP, 0F LUCK, WISCONSIN.

GAS BURNER.

Application filed August 29, 1923.

To all whom it may concern:

Be it known that I, CHRIsrnN 1i. ERIK- STRUP, a citizen of the United States, residing at Luck, in the county of Polk and State of Wisconsin, have invented certain new and useful Improvements in Gas Burners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention provides an extremely simple and highly eliicient hydro-carbon burner especially adapted for burning of gas coinmingled with air at highest possible efficiency. Generally stated, the invention consists of the novel construction, combination and arrangement of parts hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. l is a plan View of the improved burner, some parts being broken away; and

Fig. 2 is a vertical section taken on the line 22 of Fig. 1.

This improved burner is adapted to be applied in any and all types of gas or hydrocarbon burning stoves, either new or as a substitute for old burners, and it may beassumed to be arranged just below the ordinary utensil-supporting grid, not shown, but the upper surface of which will be approximately 011 the line a a of Fig. 2.

The main body member of the burner is in the form of a shell or pressed metal dome 3 adapted to rest on top of a stove or any other flat surface. The top of this dome 3 is formed with concentric corrugations and, at its center, it terminates in a large axial opening 4;. Near its lower edge, the dome 3' is provided with circumferentially spaced air intake ports 5.

Mounted in and extending above thecen tral passageway a is an approximately cupshaped burner head 6, the rim of which is provided with circumferentially spaced bearing feet or lugs 7 that overlap the upturned edge of the dome adjacent the passageway l. This burner head 6 is provided with a centrally located depending sleeve 6, into which is telescoped and secured the upper end of a short burner tube 8 that extends centrally upward from a disc-like plate 9. The

Serial No. 659,935.

plate 9 forms the top of a mixing chamber, the bottom of which is in the form of a bowl or depressed sheet metal plate 10' having an outturned rim. The out-turned rim of the bowl 10 is spaced vertically from the rim of the plate 9 by lugs 11 that are circumferentially spaced so as to afford circumferentially extended primary air supply passageway 12, which, except for said lugs 11, extend completely around the primary mixing chamber 13 formed between the bowl 10 and top plate 9. Preferably, the lugs 11 are spot-welded to the plate 9 and the bowl 10 is rigidly but detachably secured to said lugs by small screws 14. The lugs 11 are upturned and bear against the corrugated top of the dome 3.

The numeral 15 indicates a gas supply pipe that is extended radially into the dome 8 below the bowl 10, is provided with a closed end and near its end is provided with a burner tip 16 that extends axially upward through the bottom of the bowl 10 so that it will discharge gas into the primary mixing chamber 13 The burner tip 16, therefore, stands axially in line with and below the tube 8 and here it may be noted that the said tube 8, at its upper end, is expanded so that it is pern'ianently secured within the upwardly flaring passageway of the sleeve 6.

Detachably seated on the rim of the burner head 6 is a disc-like deflecting cap 17 that has circumferentially spaced rest lugs or feet 18 that rest upon and telescope slightly into the rim of said head 6. The rim of the cap 17, except for the lugs 18, is spaced from the rim of the burner cap 6 to form a nearly complete annular discharge passageway 19'. The head 6 and the cap 17 are thus spaced to afford a secondary mixing chamber 20'.

By the use of this improved burner, the gas will be delivered through the pipe 15 and tip 16 into the primary combustion chamber 13, where it will be commingled with air drawn into said chamber through the sub stantially annular air intake passageway 12. Air to the interior of the dome 3 will, of course, be supplied through the intake ports 5. The air and gas will be quite thoroughly commingled within the primary mixing chamber 13, but from thence it will be drawn in a quite rapidly moving stream through the contracted tube or neck portion 8 and will lUU then be delivered into the secondary mixing chamber 14 and again expanded before it reaches the combustion point. From thesecondary mixing chamber 20, the gas, diluted with air, will be discharged in a substantially annular stream through the substantially annular passageway 19, and as it is thus discharged, it will be further commingled with an additional supply of air drawn in through the dome and discharged through the annular passageway 41: formed be tween thetop of the dome and the bottom of the burner cap 6.

It is important to note that a large amount of air will be confined in the dome 3 and that the movement of air through said dome will be very slow. This will cause the air to be preheated within the dome, so that preheated air will be delivered into the primary mixing chamber 13' and the air that is delivered through the central passageway a and under and around the burner head 6 will also be preheated. This preheating of the air accomplishes several important things' Inthe first place, it insures a better and quicker mixing of the gas and air. In the second place, it produces a higher temperature in the flame and results in a very ma terial saving of gas.

It will, of course, be understood that the whole-top surface of the dome will absorb the downwardly radiated heat that is usually wasted and, by conduction, transfers the heat units to the air, which sooner or later enters into the production of the flame. The

corrugation of the top of the dome increases its heat-absorbing eliiciency.

WVhen the burner is in action, the metallic walls of the primary mixing chamber 13 will get quite hot, so that the air and gas will be preheated while they are being commingled in the said chamber and the commingling of the two will be facilitated by the increased temperature. The temperature of the commingled air and gas will be raised to a still higher point when they are expanded and further commingled in the secondary mixing chamber 20. The combustion will take place just outward of the annular dis charge passageway 19 and this combustion, as already indicated, will be further increased in intensity by oxygen supplied from the air discharged through the passa;,,,eway i and under the bottom of the cap 6.

It is important to note that the temperature of the gas and air commingled ther with is, by the above described burner, grad ually stepped up from its normal temperature toward the flashing point.

In the action of the burner described, the gas will be reduced in richness by a supply; of air commingled therewith under high enough temperature to insure thorough mixing; then the partially reduced gas is carried at relatively high velocity through a contracted neck or passageway into the secondary mixing chamber, which action also facilitates thorough mixing of the air and gas; and then the air and gas are again expanded and increased in temperature and brought to a point close to the flashing point of the gas. Under an extremely intense flame, the commingled air and gas in the secondary mixing chamber 20 may sometimes become ignited, but this will do no harm and the combustion will be rendered complete by the air supplied to the flame from the pa ssageway 4.

From the foregoing, it is evident that my invention is not limited to the details of construction above described, but, on the contrary, is capable of modification within the principles herein disclosed and within the scope of the claims.

What I claim is: p

1. A burner of the kind described com prising a primary mixing chamber having a surrounding substantially continuous air intake passage, a gas pipe connected to said mixing chamber through the bottom thereof, asecondary mixing chamber overlying said primary mixing chamber, as contracted neck connecting said two mixing chambers, said secondary mixing chamber having a. surrounding substantially continuous gas-discharge passageway. I

2. The structure defined in claim 1 in further combination with a dome enclosing said primary mixing chamber and having a central passageway spaced from the bottomof said secondary mixing chamber toafford a substantially continuous air discharge passageway.

3. The structure defined in claim 1 in further combination with a dome enclosing said primary mixing chamber and supporting said secondary mixing chamber but having a central passageway in its top, the edge of said dome surrounding said passageway being spaced from the bottom of said second ary mixing chamber to afford a substantially continuous air discharge passageway around said secondary mixing chamber, said dome having air intake means.

4. The combination with a dome having air intake means and provided in its top with a central air passageway, a cup-like burner head having lugs resting on said dome but having its body spaced therefrom to afiord an air discharge passageway around said head, a deflecting cap seated on said burner head but spaced therefrom to afford a substantially continuous gas-discharge passageway, said head and cap affording a secondary mixing chamber, a tubular neck extended axially downward from said burner head and having a disc-like outstanding plate at its lower end, a bowl secured to but spaced from said plate to afford a primary mixing chamber having a substantially continuous air intake passageway, and a gas pipe extended into said dome and connected through the bottom of said bowl, said bowl and overlying plate con- -i' stituting a primary mixing chamber.

5. The structure defined in claim 4 in which said bowl is detachably secured to the overlying plate.

6. The structure defined in claim 4 in which spacing lugs are secured between the 10 rim of said bowl and the rim of the overlying plate, the said lugs being upwardly extended into contact with the top of said dome.

In testimony whereof I affix my signature.

GHRISTEN K ERIKSTRUP.

Images