US288968A

US288968A - Eltas c

Info

Publication number: US288968A
Authority: US
Publication date: 1883-11-27
Anticipated expiration: 1900-11-27

Description

(No Model.) A

B. G. ATKINS.

FURNAGE FUR HEATING SAWS.

No. 288,968. Patented Nov. 27, 1883.

WITNESSES. LN VENTOB.

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UNITED STATES PATENT thrice.)

nLtAs c, ATKINS, or INDIANAPOLIS, INDIANA.

FURNACEIOR H EAT! NG SAWS.

SPECIFICATION forming part of Letters Patent No. 288,968, dated November 2'7, 1883,

- Application filed July 5,1882. (No modeLl To all whom it may concern:

Be it known that I, ELIAS O. ATKINS, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Furnaces for Heating Saws, of which the following is a specification.

The object of my said invention is to produce a convenient and easily-operated furnace for heating saws for tempering purposes during the process of manuiacture, which objectis accomplished by the construction and or rangement hereinafter more specifically set forth.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a horizontal sectional viewof my improved furnace as seen when looking downwardly from the dotted line 2 c; Fig. 2,

a central vertical section thereof on the dotted line y y; and Fig. 3, a sectional view, looking to the right from the dotted line a:

In said drawings, the portions marked A represent the fire-space of my improved furnace; B, a twostoried revolving table located centrally in said furnace; C, an arched cover over the space in which the saw is to rest; D, a device for covering the saw completely when desired, and E the door through which the saws are inserted.

The fire-space A is simply the ordinary firespace of a reverberatory furnace, the walls surrounding which, as well as the walls of the entire furnace, being constructed of brickwork lined with firebrick in the ordinary manner. The fines and other-passages for the products of combustion are marked, respectively, a c a a c a a and the course of said products of combustion is indicated by the arrows in Fig. 2. i

The revolving table Bis mounted upon a vertical shaft, B, which is provided with a pulley or gear-wheel, b, by which said table is revolved. The upper floor of this table is sustained by the columns b,which rest upon the lower floor thereof, and may be either of iron coated with some fire-proof substance or of fire-brick. The spaces between said columns and floors form the passage of for the products of combustion, which, during their passage, the saw laid thereon by radiated heat. In stead of two floors, one of which shall be separated flOllL the other by columns, as shown, a single floor formed of thick hollow castings (preferably sectors of the floor) might be em ployed, and the products of combustion would then pass through these openings and produce substantiallythe same effect as where two separate tables are employed.

The arch 0 covers the revolving table completely, and causes the products of combustion on their return through the passage (0 to pass very near the saw-plate lying on said table.

It is usually desirable that the saw shall be heated wholly by radiated heat, and for this reason I provide the movable cover 1), which is raised up by means of a lever or otherwise, and the saw slipped under the same, and then lowered again to the position shown in the drawings. When, for any reason, it is desired to dispense with this cover, it can be removed through the same door, E, through which the saw-plates are removed and inserted.

The operation of my furnace is as follows: The saw plate to be heated isinserted through the doorway E of the furnace, and placed in position on the revolving table B. The door E of the furnace is then closed, and the table is caused to revolve slowly by means of any suitable power applied to the shaft B. As before stated, when it is desired to use radiated heat only, that result is obtained by the use of the cover 1).

As will be readily understood, the continual revolving of the table secures a perfectly even heating of the saw, which is the great desideratum in tempering such articles, and the flame passing over and under the upper floor prevents any considerable warping of the sawplate while being heated.

Having thus fully described my said invenr heat said upper floor, and thus heat I tion, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, in a sau lieating furnace, of the fire-space A, the revolving table B, the arch O, and the passages c a a ct* a a a", by .which'the products of combustion are conducted underneath that floor of the table IOU on which the saw rests, and back over the top of the saw, and mechanism whereby the table is continually revolved, said severalpartsbe- In witness whereof I havehereunto set my 10 ing arrangedand operating substantially as hand and seal, at Indianapolis,Indiana, this set forth. 30th day of June, A. D. 1882. r

2. The combination, in a furnace, of the firespace A, revolving table 13, arch O, loose 1'e- ELIAS O. ATKINS. [L. s.]

movable cover D, and the various passages for the products of combustion, all substantially In presence of as shown and described, and for the purpose 0. BRADFORD, specified.

CHAS. L. THUR'BER.