US1046933A - Method of heating sheet-bars. - Google Patents

Description

- T\ V. ALLIS.

METHOD OF HEATING SHEET BARS.

APPLIUATION FILED NOV.28.1911

1,046,933. Patented Dec. 10,1912.

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Patented ec. 10, 1912.

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METHOD or HEATING S EET-sans.

gafo all whom it may concern:

.. Be it known that I, THOMAS V; ALLIs, .acltizen of-the United States, residing at Middletown, in the county of Butler and State of Ohio, have invented certain new and ,nseful Improvementsin Methods of Heating Sheet-Bars; and I do hereby declare the following to he a full, clear, and exact description of theinvention, such as will enable 'pthers skilled in the' art to which it apperins to make and. use the same,

My invention relates to the art of heating ,tl1e' h1anner of advancing them longituditnallyhalong thehearth of a heating furnace.

In the drawings 1 have illustrated two types of furnaces that are adapted to the carrying out of my invention.

lieferring to the drawings Figure -1 is a horizontal section on line 1, 1 of Fig; 2

"and Fig. 2 is a transverse vertical section on line 2, 2 ofFig. 1, also showing walls Z SE- and roof of furnace above said line. Fig.

'53; is an enlargedplan View of the bars restupon a broken portion of the upholdlng guides. Fig. dis a cross section on line-.4, 4 of Fig. Fig. 5 is a plan view in l'ngitudinal sectionon line (Z, (Z of Fig. 6 and shows a hearth designed for realizing my in- *vention in connection with an ordinary pair heating furnace, the fire box and bridge wall fcomlnon to such furnaces being shown. Fig. :16 is. a vertical longitudinal section on line i c, e of Fig. 5. Fig. 7 is a plan View in longitudinal section on line f, f of Fig. 8 and shows collections of sheet bars all upheld at one lateral inclination as may be arranged in carrying out my'invention. a verticallongitudinahsection on line g, g of Fig. 7'. Fig. 9 is a CIQSSSQCUOII of a modified form of hearth adapted for use inthe ordinary pair heating furnace' The continuous heating furnace illusmay use in practising my invention. 1 1s the heating chamber, 2 the furnace bottom and .3 the upholding hearth resting upon the bottom, and upon WhlCll the bars 4 are carried'endwise and preferably 1n. reverse angular abutment;.5 is a portal wall partitioning; the heating" chamber into two section s; it also divides the' furnace otherwise into dual parts, 6 are brldge walls between said heating chamber and the-mlxlng cham- Specification of Letters Patent.

Fig. 8 is Patented Dec. 10, 1912.

. g Application filed November 28, 1911, Serial No. 662,860.

from the roof of the heating chamber; 9 are hollow walls which partition the heating chamber from the fines 10. Gas enters reservoirs 13 through downtake flues 14:. and passes from thence through ports 15 into the mixing chambers 7. Air enters the hollow walls 9 through ports 16; becomes preheated to an extent in said hollow walls and passes down and through fines 17 to the alr reservoirs 18, from thence it traverses the flues 18 and ports 19 to said mix- .ing chambers 7, wherein the gas and air commingle and inunion ascend to the top of bridge walls 6, where combustion takes place; the flame reverberates under deflecting wall 8, passes over walls 9 and as a Waste product of combustion escapes through fiues 10 and 10 tothe open air through chimneys shown in broken lines at 20. The waste products of combustion in their escape traverse fiues10 which being located directly under the hot air flues 17, aid in raising their temperature while in passage to the mixing chambers In carrying out my new method for heat- I the arch in portal wall 5, to the discharge opening 12; from whence they are withdrawn and reduced to platesyand sheets of varying gages, the bars having become properly heated while passing through the chamber.

The ordinary pair heating furnace with my improved hearth illustrated in Figs. 5 to 9 inclusive may'also be advantageously employed in realizing my invention. Tlns furnace is provided with an upholding hearth formed with alternate parallel grooves and projections. The longitudinal side 22 is provided with a series of comparatively small doors that overlap each other at their sides, so that, while the large opening will be entirely closed, whenthe doors are all down, all parts of the hearth are made accessiblethfongh said doors. The doors are not'shown in-the drawings. Figs. 7 and 8 show collections of bars in process of being heated while upheld at an angle upon said hearth. In operating my invention in connection with the ordinary pair heating furnace last described, the bars are charged'through the doors upon the upholding hearth at the same or reverse inclination to the perpendicular as shown in the drawings. When the bars are charged upon the upholding hearth at one inclination, Iprefer to alternate the position of eachcharge rotatively, thus covering by a succeeding charge the angular upholding spaces left uncovered by the preceding charge, so that the bars, all have hot supports to rest against. I .accomplish this objectin the following manner, for e.\'an1ple:-Befoi-e the commencement of the week or working period, and in order to gain time, the hearth is charged with its full complement of bars early enough to bring them all to rolling temperature by the timethe turn comes on; F01- lowing the withdrawal of the -hot bars at neously covered and uncovered, thus the supone' end ofthe hearth, others are charged to occupy the reverse angular hot. spaces in the same grooves previously uncovered. This operation is continued until all the bars extending over the hearth have been withdrawnfa-t which time the metal at the opposite end oi? the chamber from'which heated bars werelast'drawn is hot enough to roll; thus a iihtative s stem of heating is established which continues throughout the working period.

My method of upholding bars at an angle during the process of heating ehonomizes space upon the hearth of a furnace, as is well illustrated by the following example Ye will as ume heating chamber has an availah width of twenty-four (2i) inches,

ieetto be heated are eight (8) inchesi .de. Three parallel rows of such bars horizontally laid with their longitudinal edges in contact will exactly fill this transverse dimension. -l'Four parallel rows of the same bars may be located-within said space if supported at an angle of about 45 degrees. The more acute the angle at which rows of bars are inclined to theperpendicu- 1211" the greater the number of rows will be located within certain confines.

My method of upholding bars at a re verse angle during continuous or progressiveheating permits the alternate covering and uncovering of space upon the hearth as shown in connection with the continuous heating'furnace described, the bars are progressed continuously orintermittently upon theangular hot supports which are simultaciently hot to roll. .cupying the first two grooves 23 at the left orts are subjected periodically to the direct heat of the furnace chamber.

I may secure increased economy of space in the heating chamber of a furnace by providing such a structure as is illustrated'in Fig. 9. To recover heat in such a hearth I adopt a somewhat different method from that described in connection with Figs. 1 to 8. I leave the first groove 23, at the left of the figure vacant'atthe time the hearth is first charged with bars,- which is after the hearth and all parts of the furnace have become thoroughly heated. When such bars are partially heated, those occupying thefirst groove at the right of the vacant groove. 23 are turned over toward the left into said groove which leaves the first previously occupied groove unoccupied and exposed to the normal temperature of the furnace which it soon assimilates; the next row of bars at the right of this reheated groove is then turned toward the left into it, and as it is the hot to bar of the pair that comes in contact with t e now reheat-ed surface of the groove, such groove is robbed of but little heat. This operation is continued until all of the bars across the hearth have been turned into temporarily vacated andreheated grooves, at which time, the first/bars turned are sutfi- After the hot bars ocend .of the hearth have been drawn, cold bars are charged into the second groove 23 which leaves the firstgroove again openand prepared for a duplication of the operation which is constantly repeated.

I claim:

1. The herein described method of heating sheet bars which consists in supporting them in grooves on a hearth within a furnace upon theirlower longitudinal edge and a side; the bars being so placed that their adjacent ends cross each other; subjecting the bars to heat While thus disposed upon the hearth.

2. The herein described method of heating sheet bars which consists in supporting them in grooves on a hearth within a furnace upon their lower longitudinal edge and a side; the bars being so placed that their adjacent ends cross each other; moving the bars thus disposed over the hearth and at the same time subjecting them to heat.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

' THOMAS VQALLIS.

Witnesses:

ELMoRS. CLARK,

J. S. Tom).

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