US1573472A - Burner - Google Patents

Description

A. ZANDER BURNER Filed Dec. 13, 1923 .7 n U67? for W Mu By @5M 6% a@ Aornegs YPatented Feb. 1e, 192e;

lhlltl'l QFFICE.

ALBERT ZANDER, OF CHICAGO, ILLINOIS.

BURNER.

Application led December 13 1923.

ToA all 107mm 'it fmag/ concern.'

A:Be-it known that I, ALBERT Zavniuua citizen of the United States, residing at Chicago, in the county of Cool( and State of Illinois, have invented a new and useful improvement in Burners, of which the following is a specieation.

My invention relates generally to burners employing fuel, in Huid condition, as, for example, and by preference, any suitable gas; and my object generally lstated is to so improve upon burners as hitherto providedthat they will be better adapted to perform the work for which they are intended, and in this connection effect substantially complete combustion of the fuel and render controllable, to the desired degree, the teinperature of the products of combustion issuing` from 4the burner. i i

A further object is to provide a burner which shall be eminently satisfactory for .drying the lmolds in which steel castings, especially of large size, are formed and which in its use, shall present marked improvement y over the present practice. of drying such molds which involve prolonged and expensive operations of drying in a 'rurnaceor by maintaining a fire bene-ath them in the open, both of these operations involving as anecessary incident, the high heating of the flask as well as the mold material lcontaining the impression and not being productive of the desired uniformity of resultV or insuring certainty of unimpairment of the molds. p

.Referring to the accompanying drawing:

Figure l is a View in sectional elevation of` a burner especially adapted for heating molds, constructed in accordance with my invention. 1 Figure 2 is a view in side elevation of the structure shown in Fig. l, the structure being viewed from the right hand side of Fig. l.y Figure 3 is a reduced sectional view taken at the line 3-3 on Fig. l and viewed in the direction of the arrows. Figure t is a similar view taken at the line lon Fig. l and viewed in the direction of the arrows; and Figure 5, a perspective view of a mold showing my improved burner applied thereto in operative position for heating the mold.` Y l 'The preferred, illustrated, construction ot burner, as shown as of a form suitable for employing any desirable gas as the fuel,

`comprises inner and outer concentric` shells Serial No. 650,458.

l0 and 1l spaced apart to provide the annular space l2 closed at its bottom by a cupshaped member l?, forming the lower end ofthe burner in the construction shown, the member i3 being provided on its upper surface with an upwardley-extending annular flange lll extending into the space between the shells l() and ll, these shells bearing against the upper surface of this member. The top of the burner is formed of the member l5 provided about its periphery with an annular laterally-extending flange 16 extendineacross the top of the annular space l2, this Harige being?" provided with a depending annular flange l? which extends into the annular space l2 as shown. The parts thus described are held together, as through the medium of the threaded rods shown as screwing at their lower ends into the thingie lll and extending upwardly through the flange 16 with their upper, exposed, ends provided with nuts 19.

The member l5 contains at its central portion an air-inlet port 20 which opens into the upper end of the chamber 21 of the burner, the inlet port 20 being surrounded by au annulaichamber 22 which opens into the chamber 2l through a circu lar series of ports 23, the chamber 22 containing an opening E24; for receiving fuel, as, for example, gas supplied to it through a valved pipe Q5 from any suitable source of supply.

The air inlet port 2O communicates with a pipe 2G, valved at 27 and communicating with a pipe E28 which leads from any suitable source of air under pressure. Y

The shell l0, shawn as provided with a refractory lining 2S), contains at intervals, a series of openings 30 which also extend through the refractory lining Q9, affording communicationy between the chamber 2l and the annular chamber l2. The openings 30 are shown as consisting of a plurality of symmetrically disposed. circumferential series of openings loca ted in different vertical planes, though it will be understood that the arrangement of the openings 30 may be varied .as desired.

The openings s0 are provided for the purpose ot conducting` into the chamber 2l at ditiercnt points in its wall, streams of cooling. and preferably combustion-supporting, fluid. as, for example, air, for a purpose hereinafter described, there beingprovided Vin Figs. 2 and 5.

vvith the burning fuel. Y the preferred Way of operating' the burner, the amount of air introduced into the chamto this end a pipe 31 valved at 32, Which opens at one end through an opening 33 in the lshell 11 into the annular chamber 12, and at its other end communicates with the pipe 28.

The lower member 13 of' the burner, which is also lined with refractory material, as represented at 34, contains an outlet 35 for the products of combustion, which communicates with a nozzle 56 shown as formed separately from the member 13, in accordance with the preferred construction and removably secured theretol to extend at its passage 37 tl'iereflirough, in communication with theoutlet-S, the nozzle 36 being shown as releasably secured to the member 13 between the flanges 38 thereof, by means of threaded studs 39 provided on the nozzle and extending through apertured lugs 40 on the member 13, nuts 41 screwing on the studs 39 for seeurin the nozzle in alace. The

E) outlet of the nozzle may be of any desired forni, but Where the burner is to be usedr for heating a mold as hereinafter described, it is preferred that said outlet be relatively long and narrow, and to this ond the nozzle 36 is correspondingly shapet as represented 'The member 8, in addition to the outlet 35, contains a vlighting` hole 42 shown as'located at a point Vin the member 13 diametrically opposed to the outlet 35, the hole v42 'being provided with a removable and i'eplaceable closure 43. n

To render the burner adapted for read'v assembly with the mold to be heated, `the .burner is shoWn'as provided with hoolrs 44 extending` therefrom in the same general direction as the nozzle', and with hook carrying devices 45 carried bythe burner `,at opposite sides thereof, as shown, and

extending in the same general direction as the hook 44.

In the operation of the burner the gas used as the fuel, is introduced into the chamber 22 through the pipe 25, from which it issues into the chamber 21 through theopenings 23, air being simultaneously introduced into the chamber 21 throughV the pipe 20. In accordance With the preferredway of operating the burner, the amount of air supplied to the chamber 21 through the port 20 is sufiicient .to effect, when the mixture of the air and gas in the chamber 21 is ignited,r initial combustion only of the fuel.V Simultaneous with the supplying' of gas and air to the chamber 21 as stated, supplemental air is supplied from the pipe 31 to the annular chamber 12 from Which A,it discharges, in relativ-ely fine streams, over Y a large'area of thewall of the chamber 21,

into the latter wherein it becomes mixed 1n accordance. with bustion to the end that they shall issue from the nozzle 36 at the desired temperature which may be varied, as desired, `by regulating the amount of air passing:y through the 'pipe 31.

It may behere stated that it has been found in practice that not only may the ten'iperature of' the products of combustion issuingfrom the nozzle 36 be accurately controlled, which is of particular inipor'f-ance in the heating' of a mold to dry it, but complete combustion of the fuel in combination with the temperature cont-rol, may be effected Without the occurrence of explosions or howling7 in the burner, these ob jectionable noises, and the vibrations of the structure creating' these noises, being eliminated by virtue of the admission of the gas and air separately intothe inlet end of the combustion chamber, Whereby'a time factor during the linitial stage of combustion resultinp,` in the production of a sloW or re- .along the combustionchamber resulting in the gradual admixture, With the burning` mixture, of air to support final combustion and preferably, as above stated, in an amount sufficient to effect the cooling of the products of Vcombustion The application of the burner to va mold, for drying the same, is illustrated Vin Fig. 5 wherein the cope and drag are represented at 46 and 47,respectively, the cope being supported in lspaced relation to the drag as, for example, by means of the bars represented at 48 and interposed therebetween. The burner, being provided in any desired number, depending,` upon the size of the mold to be dried, is then applied to the position shown in Fig; 5, in vvhiclf position its hoolrs 44 and 45 hook over the frame of the cope 46 and its nozzle 36 extends intol out departing from the spirit of my inven-v tion. Furthermore, while I have shown and described my burner as applied to the heating o a mold, it will be readily understood that the burner is applicable to various other situations, the wide range of tem perature control of which my device is capable adapting the burner to a wide range of usefulness.

lVhat I claim as new, and desire to secure by Letters Patent, is:

l. A burner for drying moldsor the like, comprising a hollow body affording a combustion chamber into which the fuel is introduced,` means for supplying a combustion-supporting material for supporting .initial combustion of said fuel, a discharge outlet for the products of combustion, and controlled means for supplying a final combustion-supporting and temperature-reducing medium under pressure at varying points between the point of initial combustion and the discharge outlet.

2. A gas burner for drying molds or the like comprising a hollow body alfording a combustion chamber into which the fuel is introduced, the wall of said combustion chamber containing a plurality of inlets eX- tending beyond the point at which initial combustion occurs7 and means for conducting a fluid medium under pressure into said openings for discharge into said chamber.

3. A gas burner for drying molds or the like comprising a hollow body affording a combustion chamber7 the wall of said chamber containing a plurality of inlets for the introduction of fuel into said chamber, and an inlet for a combustion supporting material, the wall of said combustion chamber also containing a plurality of inlets extending beyond said fuel inlets, and means 'for conducting a fluid medium under pressure into said openings for discharge into said chamber, beyond the point of initial combustion.

4. gas burner for drying molds or the like comprising an inner and an outer shell spaced apart to afford an annular chamber, said inner shell affording a combustion chamber into which the fuel is introduced, saidl inner shell being provided with a pluw rality of inlets effecting communication between said annular chamber and said combustion chamber, and means for conducting a gaseous medium under pressure into said annular chamber for discharge through said inlets into said combustion chamber, beyond the point of initial combustion.

ALBERT ZANDER.

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