US1195845A - Harry w - Google Patents

Description

H. W. NEAL.

FURNACE CASING.

APPLICATlON FILED MAY 31. ms.

Patented Aug. 22, 1916.

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HARRY W. NEAL, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-HALF TO HALL HARDWARE COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION.

FURNACE-CASING.

Specification of Letters Patent.

Patented Aug. 22, 1916.

To all whom it may concern:

Be it known that I, HARRY W. NEAL, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Furnace-Oasings, of which the following is a specification.

This invention relates to a sectional casing or jacket for portable heating furnaces; and one'of the objects of the invention is to provide a sheet metal casing for portable furnaceswhich is formed of a number of vertical sections, extending from the baseplate to and supporting the furnace hood, thereby enabling the casing to be completely built in the shop; knocked-down for shipment, and readily reassembled at the place where the furnace is to be installed.

A further object of the invention in forming the furnace casing of a number of vertical sections extending from the base-plate to the hood, renders the interior of the furnace readily accessible for making repairs both above and below the grate-bars after a single section is removed.

A still further object of the invention in formin the furnace casing of a number of vertical sections is that it enables me to shift, or cause one or more of the sections to be interchanged, so as to change the air-intake to meet varying building construction conditions.

A still further object of the invention consists in providing each casing section with an inner lining to form dead-air spaces for resisting the chill of the exterior atmos phere and in reducing the volume of heat dissipated through the medium of radiation.

A still further object of the invention consists in the provision of a furnace casing composed of a plurality of vertical sections which are joined together by means of suitable jOints whereby the sections are easily set up or taken down and which exclude dust from gaining access to the interior of the furnace between said casing sections.

There are other objects which will appear from a perusal of the following descrlpti-on and claims.

builders plans, so t I accomplish the objects of the invention by means of the construction illustrated in the accompanying drawings, forming a part hereof, in which Figure l is a perspective view of a portable heating furnace, showing my improved sectional casing or jacket in operative position. Fig. 2 is a top or plan view of the casing, the hood and its connecting band being omitted. Fig. 3 is a fragmentary detail horizontal sectional view, on an enlarged scale, showing the formation of the joints for connecting the casing sections together. Fig. 4 is a fragmentary detail vertical sectional view, showing the band for attaching the 11 per ends of the casing sections.

Re erring to the drawings, 10 represents the furnace proper, of any conventional style, which is inclosed by means of a casing to which the present invention is directed. The furnace 10 is mounted upon a suitable base-plate 11, which base also supports the casing. The casing in the present case is composed of a plurality of vertically disposed sections 12 which are provided with suitable connections to enable said sections to be readily assembled or disassembled. WVhen the casing is occupying an operative position, the removal of a single section, extending from the base-plate 11 to the furnace hood, renders the interior of the furnace accessible, permitting repairs to be made above and below the grate -bars. Forming the casing of a plurality of vertically disposed sections also permits the sec tions to be shifted or interchanged, which is not only desirable but important. For instance, the position of the air intake may be changed from the osition shown in the iiat the position of the casing section carrying the inlet opening and sleeve 15 must be changed, which is liable to occur during the construction of sections occupy operative position. With the above ends in view, I form the connecting joints between the sections 12, as shown in Fig. 8 of the drawings, by bending the metal along one side edge of each section into an outwardly disposed rib 13, the free edge 14 of the section extending in a direction at right angles to-the body of said rib 13. The adjacent casing section edge is bent to form an outwardly disposed rib 16, similar to rib 13, while the free edge 17 is bent back and thence brought forward to form a rib 18 which is disposed at right angles to rib 16. This reverse bending of the edge 17 provides a pocket 20 adapted to receive the free'edge or tongue 14, on the adjacent section, and forming a joint to prevent the passage of dust between the sections 12. When the sections are joined together ribs 13 and 16 are brought close together,

and by passing suitable, stove-bolts 22 through registering apertures 23 located in said ribs, the sections 12 are held positively together. The upper ends of the sections 12 are secured to a circumferentially extending band 25 by means of the bolts 26, the said band also forming the means for supporting and for securing the furnace hood 28.

Each casing section 12 carries an inner wall or lining .30 composed of sheet metal, the said inner wall being arranged to provide intervening dead-air spaces or pockets 31 between said inner wall and section. As confined air is a poor conductor of heat, these dead-air spaces 31 serve the purposes of resisting the chilling effect of the atmosphere outside the casing, and also in reducing the amount of heat dissipated through radiation. The inner walls 30 are anchored only at one end by inserting the one end into a pocket formed in bending Y rib 13, and are held firmly in place by means of the stove-bolts 22 which secure sections 12 together. The opposite ends of the walls 30 are loosely inserted under ribs 18, the latter holding the ends of the walls down upon the inner surface of the sections 12, and are thus free to move longitudinally when expanding and contracting. As the walls 30 are nearer the fire-pot of the furnace and are thus subjected to greater heat than the casing which is also protected by the deadair pockets 31, the said walls 30 are subject to greater expansion and contraction than the casing, and for this reason one end of the walls 80 are left free. The walls 30 are preferably provided with a centrally located longitudinally extending corrugation 33 which bears against the inner surface of the sections 12. In view of the fact that the walls 30 are formed on a curve and subject to a high degree of heat, there is a tendency on part of the Walls to become distorted and bulge outwardly, and to prevent this disarrangement of the walls 30 the corrugations 33 are provided to support the central portion thereof.

\Vhile I have described my invention with more or less minuteness as regards details of construction and arrangement, and as being embodied in certain precise forms, I do not desire to be limited thereto unduly or any more than is pointed out in the claims. On the contrary, I contemplate all proper changes in form, construction and arrangement, the omission of immaterial elements, and the substitution of equivalents as circumstances may suggest or necessity render expedient.

I claim 1. A furnace casing comprising a plurality of vertically disposed sections, interlocking means carried by each section for connecting said sections together, said interlocking means consisting in bending the metal along one edge-of each section into an outwardly disposed rib with the free edge of the section projecting at right angles to said rib, an outwardly disposed rib formed along the opposite edge of each section, a horizontally disposed rib formed by bending the remaining free edge of the section in reverse directions to form a pocket adapted to receive the right angle projecting edge on the adjacent section and means for drawing the outwardly disposed ribs on the adjacent sections toward each other into operative position.

2. A furnace casing comprising a plurality of vertically disposed sections, interlocking means carried by each section for connecting said sections together, said interlocking means consisting in bending the metal alon one edge of each section into an outwardly disposed rib with the free edge of each section projecting at right angles to said rib, an outwardly disposed rib formed along the opposite edge of each section, a horizontally disposed rib formed by bending the remaining free edge of the section in reverse directions to form a pocket adapted to receive the right angle projecting edge on the adjacent section, and means for drawing the outwardly disposed ribs on the adjacent sections toward each into operative position.

3. A furnace casing comprising a'plurality of vertically disposed sections, interlocking means carried by each section for connecting said sections together, said interlocking means consisting in bending the metal along one edge of each section into an outwardly disposed rib and providing a recess for anchoring the inner wall, the free edge of the section projecting laterally of said rib, an outwardly disposed rib formed along the opposite edge, a horizontally disposed rib formed by bending the remaining free edge of the section in reverse directions to form a pocket adapted to receive the right angle projecting edge on the adjacent section, said horizontal rib standing remotely from the face of the section and providing a slot adapted to receive the free end of the inner wall, and an inner Wall anchored at one end in one of the pockets in the sec tion and providing dead-air spaces for insulating said casing against too rapid radia- 10 tion of heat.

In witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 24th day of May, A. D. one thousand nine hundred and sixteen.

HARRY W. NEAL. [L.s.]

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