US1275841A - Liquid-fuel furnace. - Google Patents

Description

W. M. BUR-DON.

LIQUID FUEL FURNACE.

APPLICATION FILED NOV-3.1917.

1,2753%. Patented Aug. 13, 191&

2 SHEETS-SHEET I.

W. M. BUBDON.

LIQUID FUEL FURNACE. 7 APPLICATION FILED NOV- 3. 1917.

1,275,841. I PatentedA11g.13,-l918.

- EETS-SHEET 2.

WILLIA M. BURDON, erBELLsnILL, scorLAnn, mama To nunnons LIMITED, 015" BELLSHILL, SCOTLAND. 1 l i To all whom it may concern: j j j j I Be it known that I, WIIJLfAM MUR AY BURDoN, asubject of the King of (1rreat Britain, residing at Bellshill, Lanarkshire, Scotland, have invented certain newand useful Improvements in Liquid-Fuel Furf naces, of which the following a specifica tion. j

This invention relates to liquid fuelfurnaces of the typejknown asfoil gas furnaces, and comprising acarbureter or retort for generating the oil gas from a mixture of oil vapor or spray and air, the object being to so make such furnaces that brass or other metals and alloys can berapidly and effectively melted therein.

Heretofore, in furnaces of this kind, especially when melting yellow brass,the spelter was readily volatilized and, after thefurnace had been run for some time, subliming took place on the inner surfaceof the fines thereby choking them up, while, at thesame time,the carbureter was thickly coated.

Under my invention I so construct the furnace that the oil gas flame, or flames, or jet or jets, is, or are, directed intoa primary combustion chamber, this chamber having a cross wall or partition which extends up a distance from the floor and over which the flame or flames can pass to the melting bath.

The aforesaid cross wall has, preferably, a sloping or curved front against which the flame, or flames, or jet, or jets, can strike and then curl or bend upward. According to the temperature desired in the bath of the furnace the cross wall aforesaid may be raised or lowered (or'added to or reduced) and this is, preferably, done by having a door at one or both sides of the furnace through which bricks or blocks can be inserted or withdrawn, the door or doors be ing provided with counter-balancing means, or such like, whereby they can be readily raised or lowered.

The furnace is also so made that the bottom of the melting bath can be heated by the hot gases, a heatin chamber and an arrangement of flues heing provided for the purpose, and, further, a flue arrangement is provided whereby the carbureter, which is a well known feature in the Burdon oil gas furnaces, may be directly heated by the hot gases from the primary combustion chamber and independently of the heating of the bath. Provision is, or may be, also LIQUID-FUEL FURNACE.

. Specification of Letters Patent. 3 PatentedAug; 13, 1918, flpplieation filaments a ien. seria naaoaoat. a I

made whereby thehot gasescanbe shut off from the melting bath during re-charging. On the "drawings annexed I haveshown, by way of illustration or example, one mode of constructing a brassmelting furnace in accordance with m y invention.

Figure 1 isa sectional elevation the a furnace. j j [Fig.2. is a sectional plan, while Fig, 3 a vertical cross section on the line B, "Fig. l, and Fig. 4a vertical cross section on theline C, D, Fig. 1 In constructing the furnace? in accordance with the arrangement shown on the drawings,I provide a low wall or bridge 6 across theheating space or chamber 0 and just in advance of the bath the wall or bridge dividing the chamber into two parts, the first part being the primary combustion chamber cl andthe second part the melting chamber or bath 6. The cross wall or bridge at the combustion chamber side is inclined or an gled more or less, as shown at 7, according tothe manner in which itis desireditode flect the hot gases which impinge upon it from the usual burner g. Below the bottom ofthe bath there is heating chamber h and fluesi, z, are arranged in such manner as to direct a portion of the hot gases from the combustion chamber it had the heating chamber h from whence they pass upward through the outlet flues j. The main portion of the hot gases from the combustion chamber pass upward toward the crown of the furnace (see arrow 02) and then to the melting bath 6 so as to heat the metal therein and, thereafter, escape by means of back flues 9' to the main flue. A further portion ofthe gases from the combustion chamber is directed upward through flues k, in the crown of the combustion chamber, so as to heat the usual carbureter Z and, thereafter, pass away by the main flue m or, in some cases, they may be allowed to pass away directly through separate flues or passages a regulated by a damper 0 and arranged above the carbureter and over the combustion chamber. The arrows show the various paths followed by the hot gases.

The cross wall I) prevents direct impingement of the flame upon the metal in the bath and it also reduces the pressure of the hot gases therein. The highly heated gases from the combustion chamber are carried over the top of the Wall and distributed as j evenly oyer the bath thereby giving a much more rapid and much more satisfactory melting than-heretofore. aTheflues-j awhioh are arranged as w1ll be seen, ust;above thelevel of the metal in the bath, tend to draw down the hot gases over the top oftheim'etal. a

The furnace shown on the drawings isa fixture .but, ilif ,Cl6SlI'6(l, sit may ber-mounted.

upon trunnions or pivots and be adapted to tilt, in which case the oil supply and air supply-pipes wouldbe flexible. V

,The improvements can, of cours'e,if so desired, -be. applied to annealing, case-harden ing,.'and other low temperature furnaces of the v.typel referred to, the crossjwallfbeing arranged to sepa-rate,,more orless, theprimarycombustion chamber from the heating chamber.

Of course the ,general construction ofthe furnace could be altered or varied to, suit the metal or metals being melted or the 7 amount thereofto' betreated at'each charge.

then through the lower chamberandthence to the [outlet flue.

[2. Ali'quid fuel furnace of the type referred .to, made :with aprimary combustion chamber and a heating chamber the chambers being partially separated from one an- :fronn theaprimary combustion chamber, a "passage extending from the primary chamber through the cross wall to thmsaid bottom chamber and a passage extending from thence'to the outlet flue.

3. A liquid fuel furnace of the type referred to, made witlra primary combustion chamber into whichthe gases are directed, a heating chamber, a cross Wall partially separating the chambers, a :bottom chamber below the. said heating chamber, an inclined passage extending from the primary chamber to the bottom chamber, an outlet flue from the bottom chamber andan outlet passage from the; heating chamber to said flue.

4. A liquid fuel furnace of the type referred to, made with a'primary combustion chamber into. which the gases are directed, a heating chamber, a crosswall between the chambers, a passage over said wall, a bottom cl'iamber below the said heating ormelting chamber,-a plurality of passages extending from the. primary chamber to the bottom chamber, an outlet flue .from the bottom chamber and an'outl et passage from the heating chamber.

In testimony-whereof I, aflix my signature in presence of two witnesses.

WM. M. BURDON.

' Witnesses:

' HUGH D. FITZPATRICK,

.VVILLIAM GALL.

, "Gopiesio'! this patent may bebbtained for five cents each, .by addressing the Commissioner ot'Patentl.

. Washington; 'D. G.

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