US782697A - Continuous heating-furnace. - Google Patents

Description

PATENTED FEB. 14, 1905.

J. REULEAUX. CONTINUOUS HEATING FURNACE.

=APPLIOATION FILED SEPT. 21, 1904.

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J. REULEAUX. CONTINUOUS HEATING FURNACE.

APPLICATION FILED SEPT. 21, 1904.

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gumzwfoz fmwi f i Witnuou Jbsgy Rewleam UNITED STATES Patented February 14, 1905.

- PATENT OFFICE.

ALEXANDER LAUGHLIN, OF

SEIVICKLEY, PENNSYLVANIA.

CONTINUOUS HEATING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 782,697, dated February 14, 1905.

Application filed septemher 21, 1904. Serial No. 225,393.

To all 11/71/0111, it may concern.-

skilled in the art to which it appertains to make and use the same.

As is well known in the art, prior to the invention covered by Letters Patent of the United States No. 588,702, issued to Alexander Laughlin and myself August 24, 1897, considerable difficulty was experienced in the heating of billets in continuous furnaces because of the billets being cooled at those points in contact with the water-cooled pipes or tubes constituting the bearings for the billets in their passage through the furnace. This defeet was remedied according to said invention by passing the billets onto hearths, where they were allowed to remain for a short time before being removed or discharged from the furnace, the heat of the hearth serving to cause the black or chilled spots to disappear and the hearth itself being protected as against excessive heating and consequent softening.

The primary object of the present invention is to allow the hotgases to come in direct con one end of the furnace to the other, said bearings extending through and beyond the hearth and constituting the means for effecting the automatic discharge of the billets after the manner contemplated by the invention patented to the said Laughlin and myself by re issued Letters Patent No. 11,666, dated May 31, 1898.

Further objects are to insure the thorough heating of the hearth andbillets and to enable worn portions of the hearth to be readily removed and replaced.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinal sectional view of a furnace constructed in accordance with my invention. Fig. 2 is ahorizontal sectional view on line2 2, Fig. 1. Fig. 3 is atransverse section on line 3 3, Fig. 1. Fig. 4 is a sectional view of a slight modification.

The form of furnace shown in the drawings is constructed after the mannercomprehended by the above-noted patents, ldesignating the bed of the furnace, having raised longitudinal supportsQand a transverse pier 3 for the bearings A for the billets, such bearings beingextended longitudinally of the combustion-chamber from the charging-opening 5 to the discharge-opening 6, the arrangement of the bearings being such as to provide for the automatic discharge of the billets from the point of highest heat in accordance with the invention covered by said reissued Letters Patent No. 11,666. These bearings are composed of hollow tubes or pipes through which water may circulate from end to end, and the pipes are carried downwardly on an incline over the point of highest heatthat is to say, over the gas-inlet port 7.

8 designates a hearth extending transversely of the furnace, intersecting and itself intersected by the bearings A and over which the billets are designed to travel as a line thereof is pushed through the furnace by the pushing mechanism, (indicated at The bearings in their passage through the hearth occupy such relation to the top surface thereof as to insure the automatic removal of the billets from the bearings as they are pushed over the hearth, spaces being left within the hearth to permit the hot gases to contact directly with the cool portions of the billets, and thus effectively remove spots and secure uniformity in the heating of the billets at every point. The bearings themselves are shown as being bent slightly downwardly from the side of the hearth at which they enter onto the other side thereof, from whence they are inclined, as

' slabs that the bearings4 are passed, the spaces therefor forming pockets for the bearings and openings for the admission of the gases against the under sides of the billets. These slabs are mounted on ametallic base 13, with which they are interlocked as against displacement by the billets in their passage thereover. In Fig. 1 I have shown the hearth-slabs as having sockets in their under sides to accommodate a spline 14:, extended longitudinally of the base, while in Fig. 1 1 have shown each slab as having at the receiving side of the hearth a depending spline or tongue 15 for engaging a shouldered cut-out in the base. By either means the slabs are held in place, since the strain of the billets thereon is transverse to the interlocking with the base. Furthermore, in the event of injury to any portion of the hearth it is only necessary to remove one or more slabs without disturbing the others instead, as heretofore, of having to provide an entirely new hearth. The base 13 is cooled by water circulating through pipes 16.

The hearth is shown as located on a bridge wall or pier 17, formed with one or more transverse openings 18 to permit of the passage of the gases beneath as well as above the hearth, a continuous flow of gases being maintained beneath the line of billets clear to the discharge-flue 19, leading to the stack. Intermediate pier 17 and the gas-inlet port 7 is a cinder-pocket 20.

The advantages of my present invention are manifest to those skilled in the art. Although I have shown the bearings as passing through the hearth on lines angular to the top flat surface of the latter, yet it is manifest that the same results may be obtained by passing the bearings through the hearth on straight horizontal lines and having the upper surface of the hearth inclined from the discharging side thereof toward the receiving side. (See Fig. 1.) In each instance I secure clear openings for the gases within the hearth beneath those portions of the billets previously in contact with the water-cooled bearings.

The improvements herein described are readily applicable to forms or constructions of heating-furnaces other than those shown. Likewise it is not my intention to limit the invention to any particular construction of the hearth.

I claim as my invention* 1. A furnace having in combination therewith, bearings arranged longitudinally there of, a hearth intersecting said bearings and onto which the billets are received from the bearings, said hearth having spaces therein in line with the bearings for the admission of the gases against the under sides of the billets on the hearth, and means for pushing the billets over the bearings and hearth.

2. A furnace having in combination therewith, bearings arranged longitudinally from end to end thereof, a hearth intersecting said bearings and over which the billets are designed to pass, means for disengaging the billets from the bearings as they travel over the hearth, means for permitting the gases, while the billets are on the hearth, to engage those portions of the billets previously in contact with the bearings, and means for pushing the billets over the bearings and hearth.

3. A furnace having in combination therewith, bearings arranged longitudinally thereof, a hearth intersected by said bearings at an angle to the top surface thereof, said h'earth having open-top spaces for the bearings, and means for pushing the billets over the bearings and hearth, the relative angularity of the intersecting portions of the bearings to the top surface of the hearth serving to cause'the billets to be removed from the bearings as they travel over the hearth.

4. A furnace having in combination therewith, bearings arranged longitudinally thereof, a hearth intersected by said bearings and having spaces through which said bearings are passed at an angle to the top of the hearth, and means for pushing the billets over the bearings and hearth.

5. A furnace having in combination therewith, bearings arranged longitudinally thereof, a fiat top hearth intersected by said bearings and having spaces through which said bearings are extended on an incline from the receiving to the discharge side of the hearth, and means for pushing the billets over the bearings and hearth.

6. A furnace having in combination therewith, bearings arranged longitudinally thereof, a hearth intersecting said bearings and onto which the billets are received from the bearings, said hearth being composed of a base, a series of removable slabs and means for interlocking said slabs and base to prevent the former from being displaced by the billets, open-top spaces being formed between some of said slabs to accommodate said bearings and admit gases against the under sides of the billets on the hearth, and means for pushing the billets over the bearings and hearth.

7. A furnace having in combination thereiO ing said bearings, and a bridge-wall supporting said hearth having a transverse opening or openings therein beneath the hearth forming passages for the gases.

In testimony whereof I have signed this specification in the presence of two subscrib- 5 ing Witnesses.

JOSEF REULEAUX. Witnesses:

FRANCIS S. MAGUIRE, GEO. W. RIGHTMIRE.

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