US1529619A - Bar and sheet heating furnace - Google Patents

Description

March 10. 1925 G. J. HAGAN BAR AND SHEET HEATING FURNACE 2, 19225 3 Sheets-Sheet 1 Filed my FIG 1 y mv ENTOR film? /PJ .fl/LU j ATTORNEY March 10, 1925 1,529,619

y 5. J. HAGAN BAR AND SHEET HEATING FURNACE Filed July 2, 1923 5 Sheets-Sheet 2 lNVENTOR MMM@ ATTO RN EY March 1o. 1925 G. J. HAGAN BAR AND SHEET HEATING FURNACE Filed July 2, 1923 3 Sheets-Sheet 3 FHS. 5

NVENTOR ATTORNEY Patented Mar. 10, 1925.

UNITED .'S'flAES 'PATENT FsFl-CE- GEORG-E J'. HAGAN. OF -PERBYSVILLE PENNSYLVANIA. ASSIGNOR TO GEORGE J'.

HAGAN COMPANY. F PITTSBUBGH. PENNSYLVANIA, A .CORPORATION .0F PENN- SYLVAN IA.

BAR am) SHEET Hnazrme FUBINACE.

T 0 all @from t ,may ,concer/z:

BeA it known 'that IfGporor-L J. HAGAN, residing at Perrysville. in the county of Allegheny and State of ,Pennsylvania a citivzenof the United States, have'i'nvented or discovered .certainnew and useful Imlu'ove- 4ments in j,ar and Sheet Heating 1l`urnaces.` of ,which yimprovenients `,the `t'ollowipg is a specification.

The invention ,described herein relates to certain `inliprovements'I in v),iueating furnacesy employed in the manufacture of sheets and the inventionhas for itsobject the combination of a combustion chamber or lire'box l connected with a portion orportions adapted for the heating .of vbars and Ialso with a portion adapted for the heatingmof sheets with means for regulating the ow of products `of combustion `to the respective portions. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figure 1 is a sectional plan view of a furnace embodying the improvements claimed herein;

Figure 2 is a sectional elevation, the plane of section being indicated by the line II-IL Figuie 1;

Figures 3 and 4 are views similar to Figures 1 and 2 showin(r another embodiment of the invention; and

Figure V is a top plan view of the furnace shown in Figures 3 and 4.

In the practice of the invention the furnace is so constructed as to provide two heating chambers, one of the heating chambers, as 1, being especially adapted for the heating of sheet-bars and the chamber 2 for the heating of sheets, either in packs orin singles. These chambers are preferably arranged side by side and have a common side wall 3 which also forms one of the side walls of the combustion chamber of fire-box 4. While a stoking mechanism 4 is Shown for the supply of fuel to the combustion chamber, other forms of fuel, liquid or gaseous, may be employed. One end of the chamber l is provided with a door and with mechanism 5 for feeding bars into and through the chamber which is also provided with a door 6 at its discharge end. The chamber 2 is provided with a door 7 for charging and removing of material, the doors and 'T being arranged at the same end of the furnace. The combustion chamber 4 is connected to 1923A rSerial No. 649,009.

'is connected at its upper end to the flue`13 leading yto the stack. A suitably arranged damper `is provided for controlling the How yof products lof combustion through ythe chamber; In lthe 1construction yshown a damper 1st arranged in the flue 13. The products of combustion pass from the sheet heatingchaniber through ports -lfconnected toA dues 1,6 which in turn are connected to acommontlue 1,7, passing under 'the heatingr chamber. This flue iscon'nected at its end to up-take llues 18 which in turn are connected to flues 19 leading to the stack, and in the flue 19 is arranged a damper Z0 for regulating the flow of products of combustion from the sheet heating chamber.

In lieu of providing only one pair-heating chamber, it is preferred that two such chambers 13- should be employed and arranged on opposite sides of the sheet heating chamber 2. These pair-heating chambers are extended beyond the sheet heating chamber and intermediate of these extensions` and in the rear of the sheet heating chamber is arranged the combustion chamber 4f. In this construction products of combustion pass from the combustion chamber 4a over the bridge wall J into the sheet heating chamber and thence through ports 15Cl and flucs 16a, 17a, 1Sa and 19 as hereinbefore described, to the stack. The pair-heating chambers are connected to opposite sides of the combustion chamber by ports 8 and the products of comlguistion escape from the front portions of the pair-heating chambers through ports 10a, flues 11a, 12a and 13 to the stack, and the flow of the products of combustion is controlled by dampers 14a as hereinbefme described, in connection with the construction shown in Figures 1 and 2.

It will be observed that in theccnstruction shown and described herein, the flow of the products of combustion and i nsequentl} the amount of heat passing through pair and sheet heating chambers can be properly proportioned so as to properly heat the charges "in the respective chambers.

As a general thing, the quantity of material in the pairheating chambers Will be greater than that in the sheet heating chamber and the area exposed to the action of the products of combustion will be less and hence a higher temperature should be maintained in the pairheating chamber or chambers than will be required for heating the sheets which have the larger exposed area, in the sheet heating chamber or chambers.

l claim herein as my invention:

1. A furnace having in combination a combustion chamber, a sheet heating chamber communicating at one end with the combustion chamber and having a vcharging and discharging opening at its opposite end, an open ended bar heating chamber communieating with the combustion chamber, means for moving bars through said chamber, flues or passages for conducting products of combustion from therespective heating chambers, and dampers whereby the flow of products of combustion through the respective chambers may be independently regulated.

2. A furnace having in combination a combustion chamber, a Vsheet heating chamber communicating at one end with the comdischarging opening at its opposite end, a bar heating chamber arranged along. side of' the sheet heating chamber and having openings at its ends, means for feeding bars through the chamber, a port or passage connecting the combustion chamber to the heating chamber at a point adjacent to the end at Which the bars are charged, iues or passages communicating With the respective heating chambers at points adjacent to their discharging ends and dampers adapted to regulate the HOW of products of combustion through said chambers.

3. A` furnace having in combination a sheet heating chamber, bar heating chambers extending along opposite sidesv of the sheet heating chambers, a combustion chamber in the rear of the sheet heating chamber and intermediate the bar heating chambers, and connected to the sheet and bar heating chambers, a stack, independent Iflues extending from the several heating chambers to the stack and dampers adapted to regulate the flow of products ofcombustion through the several chambers.

In testimony whereof, I have hereunto set my hand.

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