US1569314A - Melting furnace - Google Patents

Description

Jan. 12 1926-.

w. H. CHENOWITH ET AL MELTING FURNACE Filed June 22, 1925 III/1,1117; u

Z/II/lII/IIIll/IIIIIIIIII Patented Jan. 12, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM H. CI-IENOVITH AND GEORGE G. SCHIMPF, OF BALTIMORE, MARYLAND, AS-

SIGNORS TO HARRY D. HARVEY, OF BALTIMORE, MARYLAND.

MELTING FURNACE.

Application filed June 22,1925. Serial No. 38,741.

This invention relates to improvements in furnaces for melting brass, type metal and the like, and more particularly to means for facilitating the discharge of the metal from the melting pot into a plurality of molds or ladles.

In this class of furnaces, generally, a discharge pipe leads from the bottom of the melting pot through an opening in the side wallof the furnace, and the pipe is usually held in fixed position so that its outer end cannot be moved to discharge into a plurality of molds. In some cases, however, the inner end of the pipe is swiveled to the melting pot, so that its outer end can be swung laterally, a horizontal slot being made in the furnace wall to permit of this lateral swinging movement. This is objectionable because of the loss of heat through the slot in the furnace wall.

In connection with our improvements, the discharge pipe extends through a relatively small hole in the furnace wall and remains in fixed position, and on the outer end of the pipe we provide a valve controlled spout, which is swiveled to the pipe and adapted to swing in a horizontal plane from a position alongside the furnace wall to various positions convenient for discharging the metal into different molds. As the end of the pipe, the spout and the swiveled joint are outside of the furnace chamber, the metal within said end, and particularly within the spout and swiveled joint, would become chilled if provision were not made for heating these exposed parts between pouring operations. We therefore provide, adjacent the furnace wall, a burner which is below the plane of movement of the spout, and over the burner and the end of the pipe we provide a hood which is above the plane of movement of the spout. With this arrangement, when metal is not being discharged from the furnace the spout may be swung out of its pouring position into position beneath the hood and over the burner, and the heat supplied by the burnerkeeps the metal within the spout and in the exposed end of the pipe and in the swiveled joint in molten condition.

In the accompanying drawing,

Fig. 1 is a central vertical section through the lower part of a melting furnace having our improvements thereon;

gig. 2 is a side elevation of the same; an

Fig. 3 is a top plan view of the furnace, partly in section.

Only suflicient of the furnace is shown in the drawing to illustrate the invention. In the drawing, a represents the lower part of the furnace comprising an upright cylindrical wall, within which the burners or heaters (not shown) are arranged, and on the top of this wall is mounted a melting pot 6, having a nipple 1, at itsv lower end, provided with an opening, through which the molten metal may be discharged, this opening being controlled by a valve on a valve stem 2. A discharge pipe 3 extends from the nipple downwardly and outwardly through a relatively small opening 4 in the side of the casing 5 of the furnace, and upon the outer end of this pipe is attached a discharge spout 6. This spout is connected to the end 3 of the pipe 3 by a swiveled joint 7, permitting the spout to swing ina horizontal plane from the position shown in full lines in Figs. 2 and 3, alongside the casing, to or beyond the position indicated in dotted'lines in Fig. 3. The discharge spout is provided with a suitable valve 8, for controlling the flow of metal from the spout.

A burner 0, for burning gas or liquid fuel, is arranged alongside the furnace wall below the plane of movement of the discharge spout, and this burner is so located that when the spout is swung to the full line position in Figs. 1 and 2, it will be directly over the burner. The burner, as shown, consists of a pipe having a horizontal portion 9, suitably perforated at the end below the spout, to permit the fuel to escape, and

I this pipe may be connected to the fuel source associated with the burners in the furnace. The hood (1 is secured to the side of the furnace and extends over the burner, the

outer end of the pipe 3 and also over the discharge pipe when the latter is in its position alongside the casing.

When the furnace is in use, and metal is not being discharged from the spout, the spout is swung into the full line position shown in Figs. 2 and 3, and the heatfrom the burner keeps the metal in the spout and in the swiveled joint and outer end of the discharge pipe hot and in molten condition, the hood serving to retain the heat over and around these parts. To discharge the metal the spout is swung outwardly from the furnace wall about its pivotal point to any de sired position for discharging into one or a number of receptacles located within the range of movement of the outlet end of the spout. The discharge of the metal is con trolled by the valve stem 2 which extends iiipwardly through the furnace in the usual way, and it may be further controlled by the valve 8. During intervals between pouring operations, it no means for heat-- ing the spout were provided, the metal would cool and solidify in the spout and this would clog the spout and also interfere with turning the spout about its swiveled joint. In order to obviate this difficulty, the burner is provided and during intervals between pouring operations the spout is swung to one side, over the burner and beneath the hood, and thus the spout is always kept hot and the metal within the spout is kept in molten condition ready for pouring.

By the arrangement described, it is possible to locate a number of molds or receptacles adjacent the furnace and discharge molten metal into these without moving the receptacles and without providing a large opening in the furnace wall, as is necessary where the discharge pipe itself is moved to fill various receptacles.

What we claim is: I

1. A melting furnace comprising an upright casing, amelting pot within the cats ing, a discharge-pipe leading from the pot through the wall of the casing, a spout on the outer end of said pipe, movable horizontally into and out of pouring position and a burner adapted to heat the spout in the latter position.

2. A melting furnace comprising an upright casing, a melting pot within the easing, a discharge-pipe leading from the pot through the wall of the casing, a spout swiveled to the outer end of said pipe and adapted to swing horizontally, a burner adjacent the spout and below its plane of movement, said spout being movable into and out of position over the burner.

23. A. melting furnace comprising an upright casing, a melting pot within the easing, a dischargepipe leading from the pot through the wall of the casing, a spout swiveled to the outer end of said pipe and adapted to swing horizontally, a hood above and a burner below the plane of movement of the spout, said spout adapted to swing into a position between said hood and burner.

A melting furnace comprising an upright casing, a melting pot within the cas ing, a discharge-pipe leading from the pot through the wall of the casing, a spout swiveled to the outer end of said pipe and adapted to swing horizontally from a position radial to the furnace casing to a position alongside the casing, and a burner adapted to heat the spout in the latter position.

5. A melting furnace comprising an upright casing, a melting pot within the casing, a dischargepipe leading from the pot through the wall of the casing, a spout swiveled to the outer end of said pipe and adapted to swing horizontally from a position radial to the furnace casing to a position alongside the casing, a burner adapted to heat the spout in the latter position, and a hood attached to the casing and extending over the outer end of the pipe and the burner.

In testimony whereof we hereunto afiix our signatures.

WILLIAM H. CHENOWITH. GEORGE C. SCHIMPF.

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