US621715A - rousseau - Google Patents

Description

No. 62|,7|5. lPatented Mar. 2|-, |899.

L. ROUSSEAU. FURNACE FUR SMELTING METALS.

(Application led Feb, 19, 1898.)

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No. 62|,7|5. I Pa'teli'ced'v Mar. 2|, |899.

L. ROUSSEAU.-

FURNACE FOR SMELTING METALS.

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UNITED STATES PATENT OEEICE.

LOUIS ROUSSEAU, OF PARIS, FRANCE.

FURNACE FOR SMLTING METALS.

SPECIFICATION forming part of Letters Patent No. 621,715, dated March 21, 1899.

Application led February 19, 1898. Serial'No. 670,965. (No model.)

To all whom t may concern.-

Beit known that I, LOUIS ROUSSEAU, a citizen of the French Republic, residing at Paris, France, have invented certain new and useful Improvements in Furnaces for Smelting Metals; and I do hereby declare that the following iS a full, clear, and exact description of the same.

The present invention has reference to an improved furnace for smelting metals in which the air required for the combustion instead of being introduced directly underneath the hearth is sent through lateral apertures formed in the casing of the hearth and inclined in such manner as to cause the air to arrive in opposite direction to the gases produced by the combustion in order that the latter should be as complete as possible and that a better utilization of the heat produced should beobtained.

The annexed drawings represent an example of construction of the furnace.

Figure l is a sectional elevation, and Fig. 2 a sectional side View, of the furnace. Fig. 3 is a plan view of the furnace seen from below. Fig. 4 is a similar viewseen from above. Fig. 5 is a sectional View through aline X X, Fig. l; and Fig. 6 is a side view of the furnace, showing all its different working parts. Fig. '7 is a similar View, but showing a modification of the mechanism for manipulating the furnace. tipping apparatus shown in Fig. 6.

The furnace-crucible A, made of any suitable material, as plumbago, is supported at its lower part by a crucible-stand B and is provided at its upper part with a collar A", bearing a crown O. The collar A is provided with a notch A2 for the running off of the metal. The form of the crucible can vary. Instead of having a plain external face it can, for instance, be made thinner and be provided with reinforcing-ribs. The cruciblestand B could valso be dispensed with. The crucible is surrounded by fillings O D, made of firep'roof material, and between said fillings and crucible there is a sufficiently large space left to receive the fuel required for the smelting, the iillings being protected outwardly by a sheet=iron casing E. A certain number of flues F are formed vertically in the filling D, said fluesbeing connected with Fig. 8 is a side elevation ofthe crown His such that by removing the crowns H and H2 the crucible can be removed when requiring to be changed. The furnace is closed at its upper part by means of a lireproof plate J, which is provided with apertures K to permit the introduction of the fuel, the said apertures being closed with covers This plate .I is also provided with a central aperture L, closed by a cover L', which is provided with perforations L2 for the escape of combustion-gases.

' The bottom of the furnace is formed with a cross-beam M, which rests at one of its ends on a plate N, fixed tothe casing E, and supported at its other end by a pin with key O, said pin being passed through the casing E and located in a boss of the cross-beam M. The latter supports a split plate P, made of two pieces fixed together by means of ribs P. To facilitate the removing of such plate, the same is fixed on the cross-beam M by means of two bolts and keys P2. The filling D rests at its lower part on a U-shaped iron beam fixed on corner-plates S, Fig. 3, fixed to the casing E.

The irons R and S are provided with holes, corresponding to the iiues F for the passage of air. The flttin g up of the parts which form the bottom of the furnace is arranged in such way that the air can only enter the hearth by passing through the flues F.

The furnace is placed in a pit T and is supported on a metal crown V, which is cut out in the center with a view to allow the air coming from the blast-machine through the pipe V to pass.

The operation of the furnace is as follows: The metal to be melted being placed in the crucible-pot and the furnace being fired, the air coming from the blast-machine is forced through the flues F and through the aperture G and arrives into the hearth-in the direction shown by the arrows. The current of the air blowing in a direction opposite to that of the IOO gases, it mixes itself closely with them and accelerates and completes their colnbustion. In coming at the upper part of the hearth the gases pass through the annular aperture I to escape through the opening L. In this way they pass to the upper part of the crucible and heat the metal to be melted by radiation.

To simplify the operation of the furnace at the time of the running off, two trunnions a, mounted in sliding blocks b, which slide between two standards c, located on each side of the furnace, are fixed to the casing E, Fig. 6. On one of the trunnions a is fixed a sleeve d, which is provided with two sockets in which a lever e can be introduced to cause the furnace to oscillate on the trunnions a. These parts are clearly shown in Fig. 8. A fork fis mounted on the trunnions a and permits the furnace to be lifted bv means of a tackle or any other lifting device. This operating device can be replaced by that shown, Fig. 7. The two standards c are connected together by an arch-beam g, supporting a shaft 7l, on which are mounted two gearing wheels 1T, engaging with chains 7a, attached to theV trunnions d. The shaft 7L is driven by means of a worm engaging with a Worm-wheel l, mounted on it. The motion is transmitted to the worm Zby a fiy-wheel m, provided with crank. To facilitate the lifting of the furnace, the weight thereof is equilibrated by means of a balancing-weight attached to a chain n, and acting upon the shaft 71` through the medium of a wheel p. To cause the furnace to oscillate on the trunnions a, a wormwheel r is fixed on one of the latter, and said wheel is adapted to engage with a worm (l, driven by a fly-wheel, when the furnace is lifted. This device permits the whole furnace to be operated by means of the two flywhecls m and only.

I claim-- 1. In a smeltingfurnace as described, the combination with-a hearth, of suitable means for supplying fuel to said hearth from above, a crucible-pot arranged and suitably mounted in said hearth, a casing surrounding and adapted to carry said hearth or combustionchamber, a fire bridge or crown supporting said Crucible at its upper end, channels connecting said hearth and crucible-pot, means associated with the Crucible-pot for the escape of gases of combustion and suitable means for its oscillation, a pit contiguous to and below said combustion-chamber, vertical ues formed between said casing and the wall of the combustion-chamber and communicating with said pit, said wall being provided with downwardly-inclined channels adapted to admit air to the combustion -chamber, whereby an intimate mixture occurs and the combustion of said gases is completed, and suitable means for su pplyn g air under forced draft to said pit, substantially as described.

2. The combination with a smelting-furnace, a Crucible-pot arranged therein7 and means for supplying air laterally to the combustion-chamber7 of a pair f trunnions sccured one on each side of said furnace and mounted in sliding blocks, standards c adapted to guide said blocks, a sleeve fixed to one of said trunnions, said sleeve being provided with sockets; and a lever adapted to be engaged in said sockets, whereby the furnace may be oscillated on said tru unions, substantially as specified.

In witness whereof I have hereunto set my hand in presence of two witnesses.

LOUIS ROUSSEAU.

Witnesses:

LUILE GRNNER, EDOUARD TERWELs.

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