US412187A - Tube-welding furnace - Google Patents

Description

(No Model.)

H. JEFFREY.

TUBE WELDING FURNACE. No. 412,187. Patented Oct. 1, 1889.

W I'INESSES: IN'7N'IOR UNITED STATES PATENT EEicE.

HARRY JEFFREY, OF LUDLO /V, KENTUCKY, ASSIGNOR OF ONE-HALF TO FRED. HOEFFLIE, OF MERIDIAN, MISSISSIPPI.

TU BE-WELDING FU RNACE.

SPECIFICATION forming part of Letters Patent No. 412,187, dated October 1, 1889.

Application filed August 8, 1887.

To aZZ whom it may concern:'

Be it known that I, HARRY JEFFREY, of Lud1ow,in the county of Kenton and State of Kentucky, have invented a new and useful Improvement in Tube -Welding Furnaces, which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure I is a front view of my furnace, partly in section. Fig. II is an end or side view of the same; Fig. III, topview, and Fig. IV perspective view ofthe hood.

The object of this invention is to construct a furnace capable of producing an extra amount of heat for rapidly heating metalbars, tubes, and other articles to be welded; and it consists of a structure made, preferably, of firebrick, wherein the lower part of the interior is V-shaped in form, having two vertical chambers, (one on each side of the central fire-chamber space,) in which the mass of coal is to be placed, the central space being provided with an inclined U-shaped hood and being provided beneath a V-shaped coal-space with a pipe which connects with a blast-fan, so that when air is forced through the pipe it will pass up through the mass of the coal centrally and escape from the coal at a point beneath the hood, all of which will now be fully set forthin detail.

A rep resents the outer wall of the structure, which is composed of the side walls a, Fig. III, and the front and rear walls a a respectively, and is preferably made rectangular in horizontal section, the base of the chamber within being inclined at each end at an angle of about forty-five degrees, as shown at B. These lines B converge toward the center, a grate 0 being placed at their base. The walls a" a are provided with rectangular instanding ledges or shoulders N flush with the tops of the inclines B. The chamber D thus formed is to receive the coal. Vertical chutes E E extend up from the fire-chamber D on each side of the central space F. The inner walls G G of the chutes are slightly inclined, so as to enable the hood H, which is placed in the space F, to be readilywithdrawn. The chuteplates G are slid in grooves g, Fig. III, into position, the said grooves retaining them in Serial No. 246,438. (No model.)

The hood H is preferably made of place.

be made of any fire-brick, although it may other suitable material, and is provided with I a handle I on top. This hood is designed to be placed in the space F directly over the hole in or top of the chamber D. The pipe J from the blast-fan passes through the ashchamberK to the grate C, so that the force of the blast will be exerted upward through the mass of the coal to the region of the hood, causing the superheated flame from the burn ing coal to rise beneath the hood, where it is confined, in a measure, thereby.

As the action of the blast generates a large amount of gas, it is desirable that the workmen shall be protected from it as much as possible, and in order to do this I have provided a pipe L, the lower end of which is connected with the blast-pipe J, and the upper end of which extends to the hood,so that when the blast is forced through the pipe J a portion of the air will be directed through the pipe L to the hood and blow the gases out of the hood. The pipe L has a valve L, so as to regulate the draft, as desired. If desired,one or both sides of this hood may be partially closed by means of suitable doors, so as to still further confine the direct action of the blast within the hood, and thus increase the temperature. The top of the chutes E may or may not be closed; but in either event the blast from the pipe J will pass through the coal at the point of least resistance, which will be the point covered by the hood, and as the bottoms B are inclined it is obvious that the coal placed in the chute E will move down of its own gravity, and thus automatically feed coal as it is desired.

The advantage in this form of furnace is that the article to be welded, which is placed in the furnace below the hood, does not come in contact with the coal, and it is not necessary in heating the metal to constantly stir up the coal in order to insure a welding heat. The lower edges of the sides of the hood H rest upon the ledges or shoulders N, which also widen the bearing-surfaces upon which the tubes to be welded rest.

\Vhat I claim as new is In a tube-welding furnace, the combination of a furnace-chamber having aV-shaped b0t- In testimony that I claim the foregoing I tom, the grate 0, plates G, f.orn1ing the inner have hereunto set my hand, this17th day of Walls of said chutes E, the removableV-shaped June, 1887, in the presence of Witnesses.

hood H, the blast-pipe J, arranged under the HARRY JEFFREY. 5 grate, and the branch air-pipe L, opening into \rVitnesses:

the hood H, said branch pipe having a valve ROBT. S. MILLAR,

L, substantially as specified. ROBERT RAMSEY.

Images