Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2011283 A
Publication typeGrant
Publication dateAug 13, 1935
Filing dateApr 28, 1930
Priority dateApr 28, 1930
Publication numberUS 2011283 A, US 2011283A, US-A-2011283, US2011283 A, US2011283A
InventorsLyman C Huff
Original AssigneeLyman C Huff
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for efficiently burning fluid fuels
US 2011283 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


Application April 28, 1930, ,Serial No. 447,987

1 Claim.

This invention relates to a means and method of burning combustible gas, and refers more specically to the eiiicient burning of gas as a fuel in domestic and industrial furnaces or the like.

The utility of the invention, as well as the objects and advantages thereof, will be apparent from the accompanying drawing and following detail description.

In the single drawing, a vertical sectional elevation is shown illustrating suitable instrumentalities for carrying out my invention.

Referring in detail to the drawing, I indicates a lower header of a conventional furnace which may be annular in shape and may be of any conventional type. A plurality of tubes 2 may connect into the upper portion of said header and may be connected at their opposite upper ends to a similar header (not shown). It is to be understood, of course, that the type of furnace in which my invention is to be used is immaterial and may take the form of a steam, hot water, vapor, hot air furnace, or the like.

A plate 3 may be enclosed Within the header I and may be supported by brackets or angle irons 4. Plate 3 may be provided with a series of circularly disposed apertures 5 and a similar series of apertures 6. A plurality of radially extending bars 1 may be supported beneath plate l3 by means of bolts 8 and 9, said bars being spaced from plate 3 by means of collars or spacers I and Il, respectively. A shutter or damper I2 of circular shape may be slidably positioned between the bolts 8 and 9 and may be interposed between the bar 1 and plate 3, said shutter being provided with a series of apertures I3 which may be adapted to register with the apertures in the plate 3. I

To facilitate'the movement of shutter I2 and hence control the degree of registration between the apertures 5v in the plate 3 and apertures 3 in the shutter I2, a handle I4 may be provided upon the lower surface of shutter I2. A circular shutter I5 may be positioned beneath apertures 6 and may be provided with a series of apertures I6 which may be adapted` to register with apertures 6 upon circular movement of the shutter I5 within the space between plate 3 and bar 1. To facilitate this movement, a handle I1 may depend from the lower surface of shutter l5.

It is to be understood, of course, that although slidable shutters or dampers are shown for controlling the opening and closing of apertures 5 and 6, the invention in its broadest concept contemplates the use of any suitable type dampers.

A hearth I8 of heat radiating material may be positioned upon the upper -surface of plate 3, the outer surface of which may follow the contour of header I. The hearth I8 may be divided into two sections, an outerv annular portion I9 and an inner portion 20, said portions being so spaced from each other as to provide an annular fissure 2|. The inner portion 20 of the hearth may be provided with an opening 22 at its center which may connect at its lower end with the apertures 6 in the plate 3. The upper edge of the opening 22 may be rounded as shown at 23 to define a more or less crater-like opening.

A mixing chamber 24 may be co-axially positioned within opening 22 and may be' provided internally at its lower end with a Venturi neck 25. The element 26 forming said Venturi neck may be removably positioned within the chamber 24 by means of set screw 21 or other suitable fastening means. An air chamber 28 may be threadedly mounted on the lower end of mixing chamber 24 and may be provided at its lower end with a plate 29, said plate being threadedly engaged upon the inner surface of chamber 28. The plate 29 may be provided with a plurality of circularly disposed apertures 30 and may support at its center an upwardly extending nozzle 3|. l A shutter 32 may be positioned immediately adjacent the lower surface of plate 29 and may be maintained in operative slidable position by means of nut 33. The shutter 32 may be provided with a series of apertures 34 which are adapted to be brought into or out of registration with apertures 30 by the rotation of shutter 32. To facilitate said movement, a handle 35 may be mounted upon movable shutter 32. 'I'he lower end of nozzle 3| may be connected by means of elbow 36 to fuel intake pipe 31.

A cap 38 may be threadedly mounted upon the upper end of mixing chamber 24 and may be provided with a plurality of laterally disposed aper- 40 tures 39. A hood 4U may be mounted upon the cap 38 by means of bolt 4| and may be spaced therefrom by collar 42. The hood 40 may be provided with a plurality of openings I3, the purpose of which will be hereinafter more fullyl described.

In carrying out my invention a uid fuel, such as, for example, the usual commercial illumina-tling or heating gas, may be introduced through pipe 31 and may be discharged through nozzle 3| into the Venturi neck 25. Due to the fact that the gas under pressure is passing through a more or less restricted opening, an inducing action will take place which will draw air through openings 3l and 30 into air chamber 28 and thence into chamber 24 where the induced air and combustion gas will mix. The mixture will then be discharged through apertures 39 and is passing between the rounded defining edge 23 of aperture 22 and the ou-ter curved edge 44 of hood 40, a secondary supply loi' air will be drawn through apertures I6 in shutter I5, apertures 6 in plate 3 through opening 22, and will mix with said discharged gas and tend to produce a more eilicient combustion of the mixture issuing from aper- -tures 39.

It can readily be seen that as the combustible mixture issuing from apertures 39 is ignited, the heat radiating material 20 will become highly heated and will give off a great amount of radiant heat and, in addition, due to the peculiar character of the space 45 provided between the rounded edge 23 of the hearth 20 and the lower curved edge 44 of the hood 40, a zone of reduced pressure will exist beneath hood 40. This, as can readily be seen, will tend to induce a recirculation of the gases issuing from the apertures 39 through apertures 43, as shown by the arrows at 46. In this manner, the freshly introduced mixture issuing from apertures 39 will be heated both by contact with the hearth 20 and by the recirculation of the heated combustion gases 46 passing through apertures 43.

By diluting the freshly admitted gas with recirculated hot gases combustion will take place gradually and the noise of combustion will be greatly diminished. The character of the flame can also be controlled by the amount of hot gases recirculated and a highly luminous or radiant flame may be obtained. By recirculating hot gases in this manner any incompletely burned fuel will again be brought in contact with air in a high temperature zone and complete combustion will be eifected. It is obvious that inasmuch as the air passing through apertures I6 and 6 and space 22 must travel adjacent the hot hearth 20, the same will become preheated and will tend to further cause eicient combustiom o A plurality of upwardly extending projections 41 may be provided upon the upper surfacesof hearths 20 and I9 and tend to impede or divert the gases passing adjacent the upper surfaces thereof, causing said gases to eddy and be main- .tained in contact with the upper surfaces of said hearths. In this manner a greater areaof radiant iiame will be provided.

As the hot gases of combustion pass the upper end of fissure 2 I, air will be induced through said iissure and will mix with said gases of combustion and tend to form a more radiant name.

To control the character oi' theiame caused by the ignition of the gases issuing from apertures 39, the air brought into mixture with said gases may be regulated initiallyby the degree of registration of the apertures 34 and 30, and thereafter additional quantities of air may be brought into contact with the ignited mixture by controlling the degree of registration of apertures I6 and 6, and also the degree of registrat1on of apertures I3 and 5. In this manner, a close control may be maintained upon 'the character of flame produced.

If desired, the metal portions of my device which may be subjected, to high temperatures, for instance, hood 40, cap 38, spacer 42, bolt 4I, etc., may be constructed of a metal having high heatresisting properties. Also, if desired, a heat insulating medium, such as asbestos or the like, may

separate plate 3 from refractories I9 and 20, as, .26

shown best at 48.

It is to be understood, of course, that instead-' of relying upon inducing means for supplying air,

a blower (not shown)v may be utilized to supply said air. And, if desired, the heat radiating hearths I9 and 20 may be dispensed with, and an annular member (not shown) may take the place of the rounded defining edge 23.

I claim as my invention:

In combination, means forming a primary air supply chamber and a mixing chamber connected thereto, a fuel supply pipe extending into said air chamber to discharge fuel under pressure into said mixing chamber and to thereby induce a ilow of air into said mixing chamber from said air chamber, an annular heat radiating hearth surrounding said mixing chamber and forming therewith an annular secondary air chamber, a peripherally apertured distributing cap closing said mixing chamber, apertured hood means mounted above said cap and coacting with the adjacent edge of said hearth to form an annular opening through which the mixture of fuel and air from said cap is discharged across said secondary air chamber and directly over and in contact with the upper surface of said hearth, whereby secondary air and products of combustion will be entrained into the said mixture prior to its discharge through said annular opening, and a second annular hearth spaced from and surrounding said rst hearth to form therebetween a tertiary air supply chamber through which additional air may be supplied.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2424154 *Sep 12, 1940Jul 15, 1947Ex Lab IncSubatmospheric gas burner
US2561793 *Oct 26, 1948Jul 24, 1951Selas Corp Of AmericaIncandescent gas burner for furnace wall
US2577772 *Oct 3, 1947Dec 11, 1951Walter KennedyRadiant gas burner, including air filter and venturi mixer
US2582577 *Sep 25, 1947Jan 15, 1952ZinkGas-air burner provided with antiflashback member
US2595739 *Oct 7, 1948May 6, 1952Weseman Chester AGas burner
US2604937 *Oct 24, 1946Jul 29, 1952Nagel TheodoreMethod of effecting combustion of paraffinic hydrocarbon gases and vapors
US2609866 *Jul 11, 1949Sep 9, 1952Iron Fireman Mfg CoGas burner
US2625215 *Dec 13, 1948Jan 13, 1953Leo E HartGas burner and secondary air feed means
US2625992 *Jun 30, 1949Jan 20, 1953Beck Vernon SMultiple group gas burners with independent fuel and secondary air supplies
US2667216 *May 18, 1951Jan 26, 1954ZinkRadiant gas burner assembly
US2980171 *Apr 16, 1949Apr 18, 1961Selas Corp Of AmericaGas and oil burner
US3084392 *Apr 2, 1958Apr 9, 1963Johns Manville Fiber Glass IncMethod for producing a gaseous blast and for producing glass fibers
US3204684 *Jan 3, 1963Sep 7, 1965Zink Co JohnBurner head for gaseous fuel
US3330326 *May 21, 1965Jul 11, 1967Chiyoda Chem Eng Construct CoFlameless radiant burner
US3558057 *Jul 11, 1968Jan 26, 1971Faizulla Karimovich RashidovTurbine burner
US3787168 *Aug 23, 1972Jan 22, 1974Trw IncBurner assembly for providing reduced emission of air pollutant
US3853076 *Oct 18, 1973Dec 10, 1974Furnace L Dev LtdFurnaces
US3880571 *Jul 26, 1973Apr 29, 1975Trw IncBurner assembly for providing reduced emission of air pollutant
US4230445 *Jun 15, 1978Oct 28, 1980Sulzer Brothers Ltd.Burner for a fluid fuel
US4505665 *Feb 19, 1980Mar 19, 1985Southern California EdisonMethod and burner tip for suspressing emissions of nitrogen oxides
US4618323 *Aug 6, 1984Oct 21, 1986Southers California EdisonMethod and burner tip for suppressing emissions of nitrogen oxides
US4629413 *Sep 10, 1984Dec 16, 1986Exxon Research & Engineering Co.Low NOx premix burner
US6814570 *Jun 2, 2003Nov 9, 2004Zeeco, Inc.Venturi mixer and combustion assembly
DE2917982A1 *May 4, 1979Nov 6, 1980Gaswaerme Inst E VGas or liquid fuel burner - has horizontal and vertical air channels through body, communicating with central fuel and air inlet
U.S. Classification431/116, 431/168, 431/190
International ClassificationF23D14/04, F23D14/12
Cooperative ClassificationF23D2900/00011, F23D14/125, F23D14/04
European ClassificationF23D14/12B, F23D14/04