US1100782A - Reheating-furnace. - Google Patents

Description

.S.ROGERS. REHEATING FURNACE.

APPLICATION FILED FEB. 5, 1914.

COLUMBIA PLANOGRAPH 60., WASHINGTON, D. c.

W. s. ROGERS.

Y REHEATING FURNACE. APPLIOATION I'ILED'FEBj, 1914.

1,1 00,782, Patented June 23, 191i 2 SHEBTS-SHEBT 2.

\\\\ nfo v a 7nmm COLUMBIA PLANdORAPH 60., WASHINGTON, D4 c.

UNITED STATES PATENT OFFICE.

WINFIELD S. ROGERS, 0F BANTAM, CONNECTICUT, ASSIGNOR 0F ONE-HALF '10 NELLIE IVL SCOTT, OF BANTAM, CONNECTICUT.

REHEATING-FURN ACE.

Specification of Letters Patent.

Application filed February 5, 1914. Serial No. 816,667.

To all whom it may concern Be it known that I, WINFIELD S. ROGERS,

a citizen of the United States, residing at Bantam, in the county of Litchfield and State of Connecticut, have invented a new and useful Reheating-Furnace, of which the following is a specification.

This invention relates to a reheating furnace particularly designed for the reheating of small metal parts such as iron rings or collars, or other similar articles.

One of the objects of the invention is to provide an improved construction in such furnaces by which the passage of the material through the furnace shall be facilitated and a uniform and advantageous dis tribution of heat will be obtained.

Another object of the invention is to provide a construction in which all of the moving parts of the apparatus are fully protected from high temperatures and in which the driving mechanism is located entirely below the heating chamber and beyond the influence of the hot gases used in the operation of the apparatus.

With these objects in view my invention comprises certain features and combinations of parts which will be hereinafter described and more particularl pointed out in the appended claims.

A preferred form of my invention is shown in the drawings in which Figure 1 is a side elevation of a reheating furnace, partly in section; Fig. 2 is an elevation partly in section taken at right angles to the plane of Fig. 1; Fig. 3 is a sectional plan view taken on the line 33 of Fig. 1;' Fig. 4 is a similar View taken on the line 44 of Fig. 1.

The reheating furnace shown in the drawings comprises a set of heavy castings or legs 10 upon which the moving parts of the apparatus are mounted and which also support the upper part 11 of the apparatus which constitutes the furnace proper. The upper part 11 is formed of fire brick or other heat-resisting material and comprises a heating chamber 12 and a combustion chamber 13. These chambers are circular in cross section as shown in Fig. 4 and within the chamber 12 there is rotatably mounted a circular table 14. Upon its upper surface this table supports a thick layer 15 of fire-resisting tile which constitutes the bottom of the heating chamber. From the center of the tile layer 15 there projects a heat deflecting cone 16 formed of similar material. The heating chamber 12 is separated from the combustion chamber 13 by an arched partition 17 also formed of heat-resisting material and having a plurality of openings 18 therein which connect the two chambers.

Any suitable provision may be made for supplying heated gases to the combustion chamber and I have herein indicated a fuel burner B of ordinary form adapted to project gaseous or liquid fuel through the mixing chamber 19 to the combustion chamber 18. A baffle plate 20 partially separates the mixing chamber 19 from the combustion chamber 13, deflecting the mixture upwardly and producing a more uniform distribution of the charge throughout the combustion chamber. The hot gases of combustion move downwardly through the openings 18 into the heating chamber 12 and are drawn out through the exhaust fines 21.

In order to provide for feeding the parts or material to be reheated, I construct an inwardly inclined opening or passage 22 through one of the side walls of the furnace, the inner end of the bottom of the inclined passage being substantially on a level with the surface of the rotating tile. An exit passage 23 is also provided which is inclined similarly to the passage 22 but in the opposite direction, the upper inner edge of the bottom of the passage being substantially on a level with the surface of the rotating tile. A guide 24 is secured to, the wall of the furnace and projects inwardly from the edge of the exit passage 23, the inner end of the guide 24 be ing in close proximity to the cone 16. As the table is rotated in the direction of the arrow A in Fig. 4 it will be seen that small articles such as the collars C placed in the passage 22 will move inwardly and downwardly until they rest upon the rotating tile which will eventually bring them into contact with the guide 24 by which they will be forced outwardly until they reach the exit passage 23 and thus pass out of the furnace. As they leave the passage 23 they may fall upon a suitable conveyer or may be received in a receptacle conveniently located.

The table 14 is a massive circular casting supported upon an anti-friction heavy rotating shaft 25. The shaft 25 rotates in a bearing 26 of any usual type mounted in a heavy cross frame 27 which in turn is secured to the base 10. The lower end of the shaft 25 is supported upon an anti-friction bearing 28 which supports the weight of the table and takes the end thrust of the shaft. An additional side bearing 29 receives the side thrust at the lower end of the shaft due to the driving mechanism and is herein shown as being of the anti-friction type.

The driving mechanism comprises a heavy worm gear 30 mounted upon the shaft 25 with which meshes a worm 31 mounted upon a shaft 32 and driven from any convenient source of power. The driving means for the shaft 32 preferably includes provision for varying the speed of rotation of the shaft so that the rate of travel of the table 14: may be properly coordinated to the nature of the Work.

lVhile the operation of the device has been indicated in the preceding description, it may be briefly summarized as follows: Liquid or gaseous fuel is introduced through the burner 18, passing through the mixing chamber 19, and being evenly distributed through the combustion chamber 13 by the balfle plate 20. The hot gases then pass downwardly through the openings 18 into the chamber 12 and are drawn outwardly through the fines 21. The cone 16 serves to deflect the gases passing down through the center of the partition 17, and increases the amount of heat received by the outer por- 'tions of the rotating table, thus insuring a very uniform distribution of heat throughout the heating chamber.

I regard it as a very important feature of my device that all of the moving parts of the furnace with the exception of the tile layer 15 and the cone 16 are entirely out of contact with the heated gases. lVith this arrangement, I am enabled to give the table 14: and the shaft 25 an extremely heavy and rigid construction without subjecting them to excessive strains due to the unequal heating of different portions thereof. I have also so arranged my apparatus that all of the driving mechanism is a substantial distance below the heating chamber and entirely beyond the influence of the heated gases. Both of these provisions are exceedingly important in practical operation.

Having thus described my invention it will be evident that certain changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as expressed in the claims and I do not wish to be limited to the details herein disclosed, but

l hat I do claim is 1. A reheating furnace having in combination a cylindrical heating chamber, a circular table closely fitting said chamber and mounted to be slowly rotated therein, said chamber having a flat unobstructed upper surface supporting a heavy layer of heatrosisting material and having a central heat distributing cone of similar material, said cone being effective to evenly distribute the hot gases throughout the heating chamber.

2. A reheating furnace having in combination a cylindrical heating chamber having side entrance and exit passages therein, a circular table rotatable in said chamber, and guiding means in said chamber, said entrance and exit openings being inwardly and outwardly inclined respectively with relation to said table and cooperating with said guiding means to facilitate the passage of the reheated material through and out of the furnace.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

WINFIELD S. ROGERS. lVitnesses RUTH Enwanns, HELEN L. HATCH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G.

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