US1321098A - Heating-furnace - Google Patents

Description

B. D. GRAY AND E. W. RUBENCAME, JR. HEATING FURNACE. n APPucAToN man MAR. e. 1911.

Patented Nov. 11, 1919.

2 SHEETS-SHEET 1.

3,0. GRAY AND E. w. RUBENCAML'JR.

HEATING FUHNACE.

APPLICATION FILED MAR.6.1911.

.Patented Nov. 11,1919.

' 2 SHEETS-SHEET 2.

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l fnv AA@ @M UNITED sTATEs PATEN BUDD D. GRAY AND W. RUBENCAME, JR., OF PHILADELPHIA, PENNSYLVANIA.,

ASSIGNORS TO THE HESS-BRIGHT MANUFACTURING COMPANY,

DELAWARE.

To all whom it may concern:

Be it known that we, Buon GRAY andI EDMUND W. RUBENCAME, Jr., citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Heating-Furnaces, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to heating furnaces and has reference more particularly to furnaces designed for heating comparatively small bars employed in the formationfof the casing rings of antifriction' bearings, the aim of the invention being to produce a furnace with-a heating chamber in which the bars may be conveniently introduced and in which the heat will be uniformly distributed so as to subject the bars to a uniform and effective heating action with little or no liability of the formation of scale.

With this aim in view our invention consists of a furnace consisting of an inclosing body-'provided with a heatmg chamber and with a plurality of combustion chambers communicating therewith, the said cham-V they will be acted on uniformly by the heat-,.

ing gases.

The invention further consists of improved means for controlling the distribution of the heating gases 1n the heating chamber in order to maintain the same at a uniform degree throughout the extent of the chamber. i

The invention consists also of certain improved details in the form and construction of the furnace which will be fully pointed out in the specification to follow and the novel features of which will be set forth in the appended claims.

Specification of Letters Patent.

walls.

A CORPORATION 0F HEATINGQURNACE.

Patented Nov.. 11, 1919i.

Application ined March '6, 1917; serial'No. 152,546.

Fig. 3 is a transverse sectional elevation on an enlarged scale on the line b--b of Figs. 1 and 3. l

Referring to the drawings:

Uur improved furnace comprises an in closing body or casing 1 preferably of elon gated form and of suitable material to withstand the high heat developed and to prevent they undue radiation of the same, the

said body being formed with a front wall 2 and a rear wall 3. Within the inclosing body in.' rear of the front wall is an elongat-ed heating chamber 4 which extends throughout the length of the body, and which at its upper end extends rearwardly in the form of a branch chamber 5 beneath an arch 6 connecting the upper ends of the two 7, 8 and 9 designate combustion chambers which extend horizontally through the rear wall and communicate at their outer ends with openings 10 through which the combustible gases from the burners are in troduced into the combustion chambers. These vcombustion chambers at their inner lends extend vertically as at 11 and commu nicate with the branch chamber 5, a vertical bridge wall l2 being arranged between the combustion chambers and heating chamber to deflect the incoming hot gases upwardly so that they will pursue a circuitous course before they enter the heating chamber. Fire bricks 13 are situated in the combustion chambers in rear of the bridge wall in such position that the incoming heating gases will impinge against them and be deflected. upwardly, the bridge wall being thus protected from the direct effect of the gases.

Flues 11a lead from the base of the heating chamber rearwardly and then upwardly between the combustion chambers, and at the outer side of the same and communicate with the outside atmosphere.

Extending through the front wall of the furnace are a plurality of circular holes or openings 14 arranged at intervals side by side with their inner ends communicating with the heating chamber so that the il il i duced into the heating'chamber ing chamber in such position that the inner extremities of the bars will rest thereon and be supported thereby. This ledge projects forwardly, as shown in Fig. 3,. from the front face of the bridge lwa l, which latter constitutes in effect a shoulder extending .upwardly from the ledge and in position to have the inner ends of the bars to be heated abutted thereagainst, in order to determine the extent of insertion ofthe bars in the heating chamber. The openings le are of a size to conform rather closely to the cross sectional form of the bars and are lined with fire brick or heat resisting collars 17, whereby the entrance of air around the bars to the heating chamber will be prevented, and the formation of scale obviated.

Due to the construction described, and more particularly the arrangement of the several combustion chambers side by side and communicating -byl circuituous paths with the elongated heating -chamber at a plurality of points, the gases are distributed in a uniform manner throughout the extent ofthe heating chamber and a uniform heat is maintained therein at all points in the the flame ofthe burning length of the same, gases being directed against the fire bricks as they enter the combustion chambers whence the gases pass upwardly and over the bridge wall and are deflected downwardly by the arch into the heating chamber. The bars to be heated, with their inner portions projecting into the heating chamber as shown in Fig. 3, will be acted on by the heating gases and be effectively and uniformly heated throughout the series.

We prefer in the operation of the furnace to prevent an absolutely complete combustion of the gases and to maintain a reducing atmosphere at all times, there not being admitted suflicient air to furnish the required amount of oxygen necessary for complete combustion. In connection with this reducing atmosphere, the comparatively close fit of the bars in the holes by preventing air from entering at that point, will effectively avoid the production and formation of scale.

It may sometimes happen that, due to the non-uniformity of the combustible mixture furnished by the burners and due to other conditions, the heat may be more intense in one part of the heating chamber than in another part, and to meet this condition we provide the flues 11LL with regulating dampers 18 to control the flow of the products of combustion to the outside. In the use of these flues for the regulation of the heat, if for instance it is found that the heat is more intense toward the center of the chama horiinvention, and

menons ber,` then the dampers of will be closed and the others opened, which the two inner fines will cause the products of combustion at the center to fiow laterally toward theends and thus develop more heat at the ends; and if the heat is more intense 'at the endsv of the chamber, the vdampers of the end fiues will be closedto cause the heating gases to flow toward the center.

The end walls of the furnace are provided by. removable caps or closures 19 lso that access may be gained to the heating4 cham'-v ber when desired.

In the accompanying drawings and forechanic, that various changes may be made in 4the form and construction of the parts without departing from the limits of the further it will be understood that the invention is not limited to any par'- ticular form or vconstruction of the parts except in so far as vsuch limitations are specified inthe claims.

Having thus described our invention, what we claim is: i

1. A heating furnace comprising an elongated inclosing body having therein a heating chamber extending lengthwise thereof and closed at its top and ends, said body being provided with a plurality of openings extending throru l y veisely of the length of the chamber for the introduction of the articles to be heated, means for directing the heating gases from the rear'in separate streams beneath` the top of the chamber downwardly onto the articles projecting through said openings, and fiues leading downwardly and rearwardly from the heating chamber and communicating with the atmosphere.

2, A heating furnace comprising an inclosing body having a heating chamber therein closed `at its top and ends, and having a plurality vofl openings extending through its front and communicating with with openings 17 leading tothe ends of the heating chamber, which openings are closed gh the front wall transllfl , upper en acerbes the combustion chambers and heating champ` ber to deliect the burning gases in their passage tothe heating chamber. A 4. A heatinlglr furnace comprising an inavin an elongated heating chamber extending engthwise thereof and having a lurality of openings through the front wallp thereof transversely vof the 'heat-I ing chamber and `communicating with the same for the introduction of the articles to.

be heated,

said heating lchamber having a rearwardly extendin branch chamber at its and-sai bod being w1th a plurality of com ustion c embers communicating at branch chamber.

5. A heating furnace comprising aninclosing body avi an elongatedheatng chamber extending engthwise thereof and havinga` plurality of openings through the front wall communicating' with the heating chamber for the introduction of the articles to be heated, the said heating chamber hav,-

mg at its upper end'a branch 'chamber extending laterally rearwardly, and said body being provided also with a plurality of combustion chambers at the rear at their inner ends with said branch chamber, and a vertical bridge wall beneath the branch chamber and between the combus-` tion` chambers and heating chamber.

6. A heating furnace comprising an inf closing body having therein a horizontal heating chamber, Asaid body being provided tion chamber in communicating with the bridge-wall' between the with a horizontal opening extending through the front wall thereof and communicating with the heating chamberfor the introduc` tion ofthe articles to be heated, a combusg the rear portion ofthe body heating-chamber, a i 'combustion chamber and the heating chamber, and a horizontal edge extending forwardly from the bridge-wall in positlon to support the ends of the articles projecting through said openings; whereby the ends ofthe articles supported by said ledge may be lined up against the wall and uniform lengths of the articles presented in the heating chamber.

7. A'heating furnace comprising an in'- closing body having therein a heating chamrovided their innery ends. with thev communicating p v upwardly from ber, said body being provided with a plurality of openings extending through its Ifront wall and communicating at their inner ends lwith the heating chamber for the introducsective combustion chambers in the path of t e incomingl products of combustion, and a bridge wall in the rear of the fire bricks; whereb the burning gases will be" deflected llpwar ly as they enter the heating chamer. Y

- 8. A heating furnace comprising an inclosing body therein at the front and having a plurality of independent combustion chambers at the rear communicating with the heating cham ber, saidbody being providcd'with regulating flues communicating at their front ends with the base `of the heatin chamber and extending rearwardly there rom and then upwardlbetween the combustion chambers and discharging tothe outside.

having "a heating chamber` 9. A heatlng `furnace comprising an in l closing body having therein a heating chamber extending through the ends of the body and having an opening through the wali thereof' communicating with the heating .chamber for the introduction of the articles to be'heated, means for supplying heating gases to the chambers, and removable closures for the ends of said heating chamber to permit access thereto.

y 10.1A heating furnace comprising an inclosing body having therein av heating chamber, said body provided with a horizontal opening extending through the front thereof and communicating with the heating chamber to. be heated, a horizontal ledge in the heating chamber in position to support the inner portion ofl the article projecting through said opening, and a shoulder extending the ledgey in `position to have the inner end of the article abutted against it.

In testimony whereof,we have affixed our signatures.

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