US810870A - High-pressure gas-burner. - Google Patents

Description

PATENTED .TAN` 23, 1906. W. KIRKWOOD. HIGH PRESSURE GAS BURNER.

APPLIOATION FILED MAR. 13, 1905.

PATENT oEEroE.

WILLIAM- KIRKVVOOD,'- OF CHICAGO, ILLINOIS.

HIGH-PRESSURE GAS-BURNER.

Specification .of Letters Patent.

Application nea umh' 13,1905. serial No. 249,894. v

To all whom, it may concern.- Y Be it known that I, WILLIAM KrRKwooD, a

citizen of the United States, residing at .Chi-

cago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in High-Pressure Gras-Burners, of which the following is a s ecific'ation;

My invention relates to gasurners, and has reference more particularly to that type of burner' commonly employed for -brazing and solderin purposes, W erein'hydrogen Vor other gas is urned in. a jet form under considerable-y pressure, the gas uniting with the air at the point 'of the burner and forming a lame'ofhigh calorific intensity.

It is found in practice that where the gas is burned under a pressure exceeding tento twelve `pounds with. the ordinar type of burnerat resent inuse it is difcu t to maintain the ame ignited, the gas issuing'from the tip'of the burner at a speed exceeding the rate of combustion, and thus causing the extinction vof the burning jet.

The leading object of my invention is to eliminate this-defect and permit the gas to be burned under a relatively high pressure, such as thirty to forty pounds, while still maintaining the constancy and .integrity of the jet. struction of burner whichprovides, in conjunction with the main j'et, a constant or permanently-burning pilot-light vin the immediate vicinity of the main jet, which serves to keep the latter constantly ignited.

Another object of the invention is to rovide a burner of the class described W 'ch may conveniently and efficiently be employedin situations more or less difficult of access, where the supply of air at the discharge-orifice of the burner would ordinarily be insufficient to maintain the Bunsen flame.

Topthis end another feature ofm'y invention. consists in a construction of burner which permits the intake of an air-supply at a oint relatively remote from the tip of the burner and the mixing ofthe air with the gas prior to the discharge of the latter from the ti PA practical form'in which my invention may be embodied is illustrated in the accompanying drawings, wherein `Figure 1 1s a longitudinal central sectional view. Fig. 2 is a cross-sectional view on the line 2 2 of Fig. 1, and Fig. 3 is a cross-sec` tional view on the line 3 3 of Referring to the drawings, 5 esignates the This object I accomplish through a con-.

` stem or shank portion of the burner-tube;v yvhich has a reduced portion 6, both of vsaid parts being axially bored to provide a longi- 1 tudinal gas-'duct 7, extending entirely there#v Patented Jan. 23, v1906.

through. Integral with or secured vto the stem 5v is an annular branch 8, having 'an axial duct 9, receiving a supply of hydrogen or other gas under high pressure through a tube 10, having a screw-threaded or other connection with the branch 8, as shown. .The outercnd portion of the tube 6 is tapered or beveled toward the tip, as shown at 11.

The opposite end of the stem or shank 5 is closed by a gland 12, through which is inserted a confining-packing 13 against the end of 1 the tube and around anaXially-bored insert# ed cap 14, which constitutes a support for the rear end of a needlevalve 15, that extends entirely through thebore ofthe gastube 6 and its stem or shank '5. Said needle-v valve is of` slightly less diameter than the in-V ternal diameterof the bore ofthe gas-tube,

thereby providing an annular gas passage-v 'Away around said valve, which passage-way 1s in free communication at its inn'er or lower end with the gas-duct 9 of the branch 8. The

needle-valve15 may have a fine axial bore l 16 extending entirely therethrough, said bore. serving as a central ain-supply for the needlevalve in some instances and being closedorcut out of use when not required by means of i a capv 17 applied to the rear end thereof.

To the stem or shank 5 of the gas-tube and entirely surrounding the reduced outer portion 6 thereof is an outer tube 1'8, said outer tube being preferably connected to vthestem 5 by 'an ordinary screw-threaded joint, as.

shown, permitting the easy longitudinal' adjustment thereof'and at its outer end having a portion 19, preferably of reduced diameter, which terminates in-a ltapered or beveled end portion 20, surrounding and substantially parallel with the beveled or tapered end 1 1 of f the tube 6. p Through this tapered end portion 20 of the tube 18, at pointssubstantially opposite or slightly in advance of the end of the tube 6-and its contained needle-valve,

are formedtwo4 or more lateral apertures' ,21. The tube 18 is kalso preferably'proroo vided at a oint relatively remote from the' Y tip of the urner and adjacent'to its connection to the shank 5 with two or more lateral apertures 22, designed for the admisslon of air in the man er andunder the circum' stances hereinafte described, which air-ad-f mission may be 'wholly or partially-out off when not required by means of a sleeve 23,

surroundin the tube-18 and having a screwthreaded siding adjustment thereover, as shown. The reduced portion 19 ofthe tube 18 is also externally threaded to receive a shortvsleeve 24, surroundin 4the beveled or tapered end portion 20 of t e tube 18,V said sleeve 24 also being correspondingly beveled or tapered where it surrounds said tapered endof the tube 18, as indicated at'25. It

will be observed that the tube 18 and sur-,

rounding sleeve ,24 extend some little dis- "tance beyond the ends of the inner gas-conducting tube 6 and its contained 'needlevalve 15.

The burner of my invention is capable of o erating either on the Bunsen-ameprincip e, wherein the gas is mixed with ,air ata oint behind or in rear of the discharge-orice, or on the principle of the atmospheric burner, wherein the airunites with the gas at the tip or discharging-point of the burner.

v`When operating in either way, however, my improved burner provides in associationwith the main gas-jet, which is under a relatively high pressure, an auxiliary jet adjacent thereto of relatively reduced pressure, which latter is continuously burning whenv the burner is in operation and Servesin the capacity of a continuously-ignited pilot-light,

maintaining the main jet in an ignited condition. This is eected in the apparatus described in the following manner z' The gas passin through the annular conduit 7 around theva ve issues through the outwardly-convergent end 20 of the tube 18, and in so doing,

by reason of the great expansibility ofthe gas and the continuously-contracting character of the discharge-passage, a portion of said gas passes at a less pressure through the lateral apertures 21 into the annular conical passa eway between the parts 20 and 25, there y creating` a fringe of flame entirely surrounding the main jet, which annular flame when ignited maintains itself in a constant burning condition, owing to the reduction of the pressure of the gas supplied thereto, this reduction occurring partly by reason of the relatively increased size of the conduit and partly by reason of the increasedfriction of the gas a ainst the walls of the conduit. This annular inge or jet serves to maintain the main jet constantly burning, thus permittingl air mingles with thegas at the point where the latter'leaves the end of the gas-tube 6, thereby producing the intense Bunsen flame at the tip of the burner. In this case more or less o f the air thus drawn in commingles with the gas escaping through theapertures 21, thereby producing an annular pilot-flame of similarcharacter. This last-described feature, while not essential to the efiiciency of' the burner when employed in entirely open and unobstructed situations, wherein there is a free and ready air-supply at the tip of the burner, is nevertheless of value and importance where the flame hasvto be introduced into holes, sockets, angles, or other recesses, where the air-supply at the tip of the burner fis somewhat limited.' Where itis desirable to still further increase the air-supply to the burner, the needle-valve 15 is provided with an axial bore, as shown, and by removing the cap 17 a certain volume of air is alsodrawn in by the gas from this source. Obviously the supply of air for the Bunsen flame may in the construction 4shown be taken wholly through the openings .22 or lthrough thel axial duct inthe needle-valve or through both. It. will be observed as constituting -an im vportant'practical advantage of the device shown and described that all of the several parts which control the flow of both the gas and the air, as well as their mixture at the point of the burner, are ca able of relative adjustment, so as to effect t e flow and mixture in the'desired degrees 'and proportions to give a flame of the intensity desired or required for e'achparticular. use of the device. When the device is used with the internal air- 'supply, the sleeve y18 will be screwed well forward, so as to carry the gas-discharge ti' andl its contained needle-valve relatively wel back of 'the discharge-orifice of the burnertip in order to permit a through commingling of the air and gas and the passage of a 4por-tion thereof at reduced pressure through the. lateral ports 21 and the annular passage-wa therefrom to the tip of the burner. In t 's connection it should also be noted-that-by screwin the sleeve 24 or out relatively to the tu e 18, on which it is mounted, the outer end of said sleeve determines the size of the annular orifice supplying 'the gas or mixture for the pilot-frame, thus constituting, in eect, a controlling-valve, and bysthis simple manipulation the size ofthe-pilot-flame can be easily controlled.

It 1sevident that the construction as hereinabove described, and shown` in the drawings, might be considerably modified and vvaried by th'ose Askilled in the art without departing from'the real spirit o f the invention i or sacrificing I claim- Y i 1. `A burner for highfpress'ure gas, comprising an axially-bored burnertube, a sleeve surrounding said tube and having one or more any of the advantages thereof.

IOO

IIO

lateral apertures substantiall opposite the tip of the latter, said sleeve `gleipg provided with means for directinga part'of the gas through said apertures, and an outer sleeve surrounding the end of said first-named sleeve and providing in conjunction with the latter a burner for an annular pilot-flame for the main jet, substantially as described.

2. A- burner for lhigh-pressure gas, coinprising an axially-bored burner-tube, a sleeve surrounding said tube, said sleeve having one or more lateral 'apertures substantially opposite the tip of the burner-tube and also one or more lateral air-entraining apertures in rear thereof and being so formed vas to direct a portion of the gas through said first-named alpertures, and an outer sleeve surrounding t e end of said first-named sleeve and providing in conjunction Wi th the latter a burner for an annular pilot-dame for the main jet, substantially as described.

3'. A burner for high-pressure gas, comprising an axially-bored burner-tube having a contracted tip, a sleeve surrounding said tube and having a contracted end surrounding said tip, said sleeve having one ormore lateral apertures substantially opposite the tip of the burner-tube and also one or more lateral air-entraining apertures in rear thereof,

annular pilot-flame for the main j et substantially as described.

`4. A burner for high-pressure gas, cornprising an axiallybored burner-tube having a contracted tip, a needle-valve in said burnertube, a sleeve surrounding said tube and having acontracted end surrounding said tip, said sleeve having one or more lateral apertures vsubstantially opposite the tip of the burner-tube and also one or more lateral airentraining apertures in rear thereof, an outer sleevesecured to said last-namedsleeve, and having a contractedend portion surrounding the contracted end portion of the latter to provide in conjunction therewith an annular pilot-flame for the main jet, and a sleeve controlling said air entraining apertures, said tube and sleeves being longitudinally adjustable relatively to 'each other, substantially as described.

WiLLIAM KIRKWooD.

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