US901956A - Annealing-furnace. - Google Patents

Description

Patented oct. 27, 1908.

ri. E. F. CREIGHTON. ANNEALING FUBNAGB.

APPLIOATION FILED PEB. 7, 190s.

ll'wentor` EImerE. FCreig'hton Att-5b Vtnesse@ ELMER E. F. CREIGHTON,

OF SCHENECTADY, NEW YORK, ASSIGNOR TO STANLEY G. I.

ELECTRIC MANUFACTURING COMPANY, A CORPORATION- OF NEW JERSEY.

ANNEALING-FURNACE.

To all whom 'it may concern:

Be it known that I, ELMER E. F. Climen-` ToN, a citizen of the United States, residing at Schenectady, county. of Schenectady, State of New York, have invented certain new and useful Improvements in Annealing-Furnaces, of which the following is a specification. i

This invention relates to furnaces for annealing iron, and especially large quantities of laminations of lron such as are used 1n building up transformer cores. It is a mat- `ter of some difficulty tosecure a uniform annealing of a pile of such laminations, owing to the uneven distribution of the heat in the furnace. \My invention aims toproduce such a circulation ofthe hot gases as to effect a practically uniform heating of the iron.

The invention is shown in a somewhat diagrammatic manner in the accompanying drawing, in which Figure l is a vertical cross section of a furnace built in accordance with my ideas; Fig. 2 is a top plan view of a portion of the supporting platform; Fig. 3 is a top plan view lof the truck or car on a larger scale; and Fig. 4 is an'end'view of the same.y

In the bottom of the furnace are two parallel grooves or troughs 1, in which are laid rails 2 to support and guide the ywheels 3 of a truck orcar 4, which is U-shaped in plan view in orderv to straddle the platform or support 5 which rises from the floor of the furnace between the rails. vided with four or more jacks 6, preferably hydraulic,-on which the bed or tray 7 is supwhich it can be jacks can be oppump 8 connectported and by means of raised and lowered. The erated by a hand or other ed with them by a iiexibl'e hose 9.

The sheets of iron to be annealed are assembled in apile 10` on the bed, and are then covered with a sheet-iron box or hood 11, which leaves a space surrounding the pile of iron. The truck is then run' into the furnace and the jacks are lowered until the bed rests on ythe platform. The jacks are then run down and'theltruck backed out, leaving the bed and its load in the furnace, as shown in Fig. 1.

A pipe 12 enters each side of the furnace, and air and. gas a ...supplied to it vthrough the pipes 13 and 14 respectively.. The pipe 1 2 is coiled in the exhaust iue 15 of the fur- `Specication 'of Letters Patent.

Application filed February 7, 1906. Serial 110,299,940.

The truck is prohunted oet.' 27, 190s.

nace and then terminates in a nozzle 16 aimed toward the bottom of the oven, which is preferably somewhat lower than t-he platform 5. Transverse channels 17 are formed across the platform, and from each channel a down-{iue 1-8. leads to an exhaust flue .19,

controlled by a damper 20, or otherwise. The exhaust flues 15 lead to stacks 21, which can be provided with dampers 22 while`l auxiliary exhaust fiues 26 connect flue 19 with the stacks 21. Y

In order to properly direct the inflowing jet of flame from the nozzle, the furnace may have a false bottom 23, vertically and angularly adjustable in any suitable manner, as by means of a prop 24 placed under its inner end. Or, if preferred, the nozzle may be hinged, as shown at 25, so that it can be turned to the proper angle to deliver the fiame wher'e it will be most effective.

The flame and 4hot gases first strike the lower part of the box and rise along its sides to the top ofthe furnace, where they turn 'outwardly and flowI down the walls of thev furnace to'the flues 15. A portiony of the iame and hot gases passes under the bed and out lthrough the flue 19, the amount dependin ron the position of the damper 20.` Insi e .the box, the air at the bottom is heated the hottest by the `flame impinging on the outside of the box at that point, and circulates up the sides ofthe box and down along the sides of the ile of iron, as clearly shown by the lines an arrows.

With a furnace using a side-fiame there is a tendency to overheat the material at the top of the ile, while with a jet of flame playing on the ottom of the pile the iron there will be overheated. With my arrangement the tem erature at all points of the pile may easi y be made and kept uniform.

What I claim as new, vand desire to secure by Letters Patent of the United States, is,-

1. In an annealing furnace-the comblnation with aheating chamber, of a support mounted in said chamber to carry the material to be annealed, said support having passages opening into said chamber at' the sides of sald sup ort, and heaters mounted to direct part of) the heated gases a amst the sides of said support and art o said gases into the open ends of s a1 passages.

2. In an annealing furnace the combination witha heating chamber, of a support mountedvin said chamber to carry the material to be annealed and having passages opening into said chamber, heaters mounted to direct heated gases against said support and into the passages, an exhaust flue for said chamber, and an independent exhaust flue connected to said passages.

3. In an annealing furnace the combination with a heating chamber, of a support mounted in said chamber to carry the material to be annealed and having passages opening into said chamber, heaters mounted to direct heated gases against said support and into said passages, independent exhaust flues connected to said chamber and to said passages, and a damper mounted in one of said lues to control the flow of gases through it.

4. In an annealing furnace, the combination with a heating chamber, of heaters for directing heated gases away from the walls and toward the bottom of the chamber, and exhaust ues opening into the chamber near the lower edge of the walls thereof.

' 5. In an annealing furnace, the combination with a heating chamber, of heaters for directing heated gases away from the walls and toward the bottom of the chamber, adjustable means for controlling the direction of flow of the gases, and exhaust flues opening into the chamber near the lower edge of the walls thereof.l v

6. In an annealing furnace, the combination with a heating chamber, of a support.

having open-ended passages therein mounted near the bottom of said chamber to carry the material to be annealed, exhaust flues communicating with the passages, exhaust fines opening into the chamber near Athe lower edge of the walls thereof, -and heaters in said chamber for directing heated gases away from the walls over said support and into said passages.

7 In an annealing furnace, the combination with a heating chamber, of a support having` open-ended passa es therein mounted near the bottom of sai chamber to carry the material to be annealed, exhaust ilues communicating with the passages, yexhaust Hues opening into the chamber near thel lower edge of the walls thereof, heaters for directing heated gases over said support and into saidpassages, and dampcrs controlling said exhaust flues.

8. In an annealing furnace the combination with a vheating chamber, of a flat support mounted near the bottom of said chamber, a removable bed carried by said support, a removable cover arranged to coperate with said bed to form a closed annealing chamber, said support having passages therein opening into said heating chamber at the edge of the support, and heaters mounted to direct heated gases against the edge of said support and into said passages.

9. In an annealing furnace the combination with a heating chamber, of a support having open-ended passages therein mounted near the bottom of said chamber, a removable cover arranged to coperate with said support to form a closed annealing chamber, heaters mounted to direct heated gases against the lower edge of said annealing chamber and into said passages, an exhaust flue communicating with said passages, and an exhaust iuelopening into said heating chamber near the lower edge of the walls thereof.

In witness whereof I have hereunto set my hand this 6th day of February, 1906.

ELMER E. F. CREIGHTON. Witnesses:

BENJAMIN B. HULL, HELEN ORFoRD. i

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