US1176018A - Furnace. - Google Patents

Description

T. F. lBAILY F. COPE.

FuRNAcE. APPLICATION FILED DEC. l1. 1914.

Patented Mar. 21, 1916. .E

1,176,018. @il W 57 @Mor/neig@ m conocen We, Terrien-nos Benn' in. T. Corn, citizens oi the United residing at Alliance, in the Stark and oGhio, in` useful Furnace, or which e a Specification.

@ur invention relates to improvements in furnaces Whewin current of electricity passed through resistance material is employed to produce the necessaijT heat. and has more speci'ic reiter-ence 'to means Afor utilizing the greatest possible amount of Vthe heat generated therein.

The object of this invention is to gene-rally improve such electric furnaces by more properl'ir concentrating the heat therein upon the material which it is desired to heat.

Another object is to so dispose the walls of the furnace thatthe greater part ot the heut generated through the resistance material will he either reflected r deflected by the walls upon the hca-th which supports the material desired to he rie-ated.

Vith these objects in vien* the invention consists in novel construction and arrangement of parte, hereinafter described, illustrated in the accompanying drawins, und particularly pointed out in the nppended claims, it being understood that various chauffes in the form, proportion. size and inor details construction may he made within the scope of the appended claims 'without departing from the spirit or sacrificing any of the advantages el the in; vention.

In the drawings: Figure l is a transverse sectional 'View through a. furnace construct-- cd in. accordance with mj.' invention. section taken on the line 2- Q, of

ie aecomp aniying oren ted in tl furnace is provided, consupported at its rens Z which plato l l VLE, DE ALLINGE, SHK), ASSG-NOBS TO 'lli-'E XJR, GHF), OELTIGN F OLIS.

lenjorcing angles 4 may oe provided to llire rigidi@7 to the plate' l and a layer of its ecpiialent, is preferably noon `he plete .l for the purpose of thoroughly ineulating the furnace from 'the base. This base is not claimed as a portion'oi the present invention and may be of any suitable form or Structure to constitute a support for the furnace.

lA the form of furnace shown in the accompanying drawings, the lower portion oi the furnace is composed of hollow wall blocks 6, which support the bottom Wall l', Said wall being composed of brick or other suitable nonelectricnl conducting and heat resi material. )i seriee of spaced supporting Walls 8 are located upon the hollow blocks 6 und extend transversely across the furnace. the upper portion of each Wall loeing preferably composed o1 lire brick 9, said walls supporting the centrally located hearth 10 which adapted to support the Work to oe heated. The supporting Walls also carry the troughs in 'which are placed the rcaistance materiel and electrodes, said troughs preferably consisting of the lower Walls ll which arepreiierably Jiorxned of erick andy the upright sills l2 also formed of lire. brick. `Each of these troughs is filled With a resistance bony. consisting oi a carloonaceous materiel in granular form auch as crushed coke, charcoal or the like, said carbonaccous material being designated in 'the orawings by the numeral 13. Embedded in 'the resistance material, prefer alilpv near each extremity of each trough is an electrode il, Said electrodes extending through the lurnace Walls as cest Shown in l. lt will be understood that the electrodes le should loe arranged in an electric circuit, auch construction being Well known in this nrt. Electric Wires l5 are shown connected to elch of the electrodes lll, said Wiiea .leading 'to e suitable source of elec tricity. llilien the current is Supplied to electrodes the current will he conducted om one electrode to the other through relnclined Walle 16, composed of brick, are ldisposed downwardly troni a. point adgacent the bottom of the troughs which carry the resistance material, said walls terminating at the lower edges at the bottom wall 7.

The side walls of the furnace are preferably formed of hollow block 17 as shown in Fig. l of the drawings and ire brick I8 are preferably mounted between the upper tier of these hollow block and the bottomq wall ll of the trough which contains the resist' ance material. The end walls are preferably formed of greater thickness beneath the troughs as .at 19 for the purpose of partly supporting ysaid troughs and a facing 2O of re brick is preferably formed upon the inner face of each end wall. Above the troughs which contain the resistance material each end wall 21 is preferably provided with an opening 22 by means of which the furnace may be charged or drawn and doors 23 are provided for said openings, said doors being adapted to be slid laterally or raised in any convenient and well known manner. The roof 24: ofthe furnace is shown in the drawings as forming an arch over the heating chamber. A sheet metal casing 25 is'preferably provided around the furnace although this forms no part of the invention, the specific construction of the different parts of the furnace mentioned also forming no part in the present invention -with exception of the arrangement of the roof and inside walls of the furnace with reference to the locations of the resistance material and the hearth, this invention having to do with the reflection and deiection of the heat rays.

The heat rays which radiate upward from eacliof the bodies of. resistance material will strike the arched roof and although a portion of the heat will be absorbed the greater L majority will be reiiected toward the center of the heating chamber in the same manner as light rays falling upon a polished surface, v that is to say the heat rays will .be reiected from the arched roof upon the material on the hearth. It will be understood that the bottom walls 11. will become intensely heated and' thewheatrays which are radiated downwardly from the bottom walls will strike upon the inclined walls 16 and' be deflected upwardly at an angle striking on the lower surface of the hearth l0 tending to further heat. the hearth and the material which is placed upon it. By this construe tion the greater majority of the heat which radiates from the resistance material in the form of heat rays will be reiected or de- {iected back toward the hearth from all dizfections, thereby tending to concentrate the greater part of the heat within the heating chamber upon the hearth. lltlwill also be understood that it it not necessary in order to produce the desired result to arrange the walls at the exact angles shownin the draw;-

Afrom said resistance element will be g ed upon said hearth.

Lirama ings and it is not necessary to forni the roof in the shape of'an arch as it has been found from experience that a rocf formed of angular walls arranged with proper relation to the resistance material. and the hearth will produce equally favorable results. It isv understood that the' word hearth signies any means for supporting' the material to be heated.

it is advisable as shown more clearly inV Fig. 1 of the drawing to locate the refractory troughs containing the resistance material in such a position that the trough is spaced on' all sides fromthe walls of the heating chamber, thus forming. a relieving space around the trough. By this arrangement of relieving spaces and reiecting walls the iow of heat fromthe trough to the working hearth is geatly facilitated.

Although the drawings 'and above specii 1. ln an electric furnace of the resistancetype, the combination of a heating chamber, a resistance" element located within said heating chamber,-a roof .soarranged above said resistance'element that the heat rays radiatingupwardly from 'said resistance element will `be reflected upon said-hearth and walls beneath said resistance element so arranged that heat rays radiating downwardly' reflect'- 2. 1n an electric furnace of the resistance type, the comhination'of a heating-chamber, y

supporting walls located in said fhrnaca-a hearth carried upon said supporting walls, resistanceV elementsY carried upon Saidsupporting'walls and located upon each side of said" hearth, an arched roof over said heating chamber,'said roof adapted to. reflect 1 the upwardly ldisposed heat rays Yfrom said resistance" elements upon said hearth, and

inclined walls located beneath said resistance elements and adapted to reflect the downwardly disposed heat rays upon said hearth. 3. ln an electric furnace of the resistance type, the combination of a heating chamber, supporting walls located in said heating chamber, a hearth carried upon said supporting walls, resistance elements carried upon said supporting walls and located upon each side of said hearth, an arched roof over said heating chamber, said roof adapted-to reect' .all of the upwardly disposed heat :Jaw/sx :5mm both ofvsad resistance elements have hereunto subscribedv om: names in the ma@ said hearth, and ncined wals located presence of two witnesses.

inem-.et said esistance elements but between THADDEUS F. BALY.

n @ein supporting wals and adapted to reflect FRANK T. (10?E.

the dovymjvmdly disposed heat rays upon Witnesses: ema S. H. BISHOP, La testlmony that We elann the above, we j SYLVLA BORON.

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