US2365881A - Stove - Google Patents

Description

Dec. 26, 1944.

Filed Feb. 14, 1941 B. B 'KAHN STOVE 2 Sheets-Sheet 2 I621 er gwuQ/wton EMA). A2;

Patented Dec. 26, 1944 UNITED STATES" PATENT OFFICE Bertrand B. Kalm, cl n fzaic. Ohio, assignor to The Estate Stove Company, Hamilton,

corporation of Ohio Ohio, a

Application February 14, 1941, Serial No. 318,963

Claims. (Cl. 126-58) This invention relates to stoves.

One object of the invention is the provision of round its upper portion in spaced relation with it so that the radiant stove, may if desired, be converted to a stove of the circulation type.

Another object is the provision of a stove having a heat radiating surface which is enclosed,

together into an integral assemblage, the upperv portion of the ashpit beingadapted to receive and support a sheet metal casing extending around and over the combustion chamber and provided with inlet and outlet openings for air circulation, at its lower and upper portions.

Another object of the invention is the provision of a stove having a flanged wall defining a door opening, the flange providing a peripheral channel facing outwardly within the confines of the door opening and adapted to loosely receive inwardly extending flanges on the door, the flange channel having a sealing strip which is engaged by the door flanges when the door is closed.

Other objects and advantages of the invention will be apparent from the following description, the appended claims and the accompanying drawings.

In the drawings,

Fi 1 is a perspective view of a stove embodying the present invention;

Fig. 2 is a perspective view of the stove shown without the air circulating casing, and adapted for heating effect with a comparatively large degree of heat radiation;

Fig. 3 is a vertical central section through the stove,'with its air circulating casing;

Fig. 4 is a side elevation of the stove when arranged for use as a radiating stove, with the -upper portion of the stove shown in central vertical section;

Fig. 5 is a front elevation of the stove,,with

a portion of the casing at one side of the stove removed;

Fig. 6 is a top plan view of the stove with a portion shown in horizontal section;

Fig. 7 is a sectional view on the line 1-1 of Fig. 3 and Fig. 8 is a detail sectional view of a portion of the ash door opening.

The drawings show the preferred form of the invention as embodied in a stove, adapted for use in a living room, for example, to effectively heat around the stove or to heat the room in which the stove is arranged, the stove being one which, if desired, is adapted for direct heat radiation or which, if desired, may be used in conjunction witha casing that may be conveniently applied to convert the stove to one of the circulation type.. When the stove .is used as an air circulator, the outer casing is employed with the radiating unit although the latter is constructed so as to form a heating unit which is complete in itself.

Referring more particularly to the drawings, in which the same reference numerals have been applied to corresponding parts in the several views, It designates the base portion of. the

stove and forming the ashpit, which supports the combustion chamber II, the outer surface of the combustion chamber having a substantial heat radiating effect, being heated by the coal or other fuel consumed. The ashpit or ashbox In is formed of drawn sheet steel with the sides I2 preferably made integral with the top portion l3, the latter having a blanked out opening of a size substantially corresponding to the diameter of the combustion chamber, and the front wall of the ash box also having a blanked out opening for the removal of ashes from the ash box, a door it normally closing the latter opening. The bottom portions of the walls l2 are suitably united by a seam or welded connection to a sheet metal bottom plate l5, while legs I8, which may also be made of steel, may be welded or otherwise attached to the corners of the ash box to support the plate IS a suitable distance above the floor. The front door of the ash box is preferably formed of a sheet steel plate having peripheral inwardly extending flanges i8 and provided .with

2 wall of the ash box. The door has a hlnse connection between a bracket 2| and the inner side of the ash box. The bracket is welded or otherwise fixed to the inner side of the door and curves around the adjacent part of the ash box wall as shown in Fig. 7 and the hinge axis is located a little distance beyond the door receiving channel so the door may be opened and closed without striking the portions of the ash box which define the door opening. The ash box door opening is defined by inwardly extending flanges 22 which are reversely turned to form an outwardly facing peripheral channel within the confines of the door opening, the width of the channel being preferably considerably in excess of the thickness of the flanges I! on the door so that the edges of the door flanges may readily enter the channel when the door is being closed. Received in the channel is a strip 24 of suitable deformablematerial such as a ropeof asbestos whichis pressed by the door flanges It to form a suitable seal when the door -is closed. The asbestos strip may be inserted in the channel and held in position substantially filling the seat portion of the channel, which is made, as shown in Fig. 3, of somewhat greater width than the channel opening. The asbestos strip may initially have a diameter substantially the same as the width of the channel opening so it may be readily inserted, but when the door is firmly pressed to its closed position it squeezes against the asbestos strip and forces it out against the side portions of the channel ,so it will be subsequently retained there and prevented from accidental removal. I

The combustion chamber II is formed of a sheet steel cylinder the lower end of which preferably extends into a groove 25 pressed in the upper wall ll of the ash box, and having a welded connection at this groove. Welded to the top of the sheet steel cylinder is a dome or top plate 26, also of sheet metal. When the stove is used as a radiant stove, the dome 26 may detachably receive a decorative radiant top plate 21 provided with openings 23, the plate 21 merely resting on suitable supporting portions such as the lugs 29 on the combustion chamber so it may be very quickly removed.

An opening 30 is provided in the rear portion of the combustion chamber, the outwardly extending flange 3| at this opening being adapted to receive the smoke pipe or flue connection. At the front of the combustion chamber is a feed opening defined by a door frame 32, preferably of sheet metal welded to the combustion,cham ber cylinder and projecting outwardly a suitable distance. A door 33 is hinged to the door frame 32 and forms a closure for the opening.

At or near theflower end of the combustion chamber cylinder, and resting on the annular flange 35 of the ash box, is a ring 36 which forms a shelf carrying heat resistant or refractory material 31 such as fire brick or the like. The rin 36 may be loosely positioned on the flange 35 or may be fixed to it by suitable bolts. The refractory lining preferably extends up to about the level of the top of the feed door opening, being omitted at the feed door opening itself, and forming a protection to the sheet metal shell from intense heat that might be produced in the coal bed. The ring 36 also carries a grate 38 which may be rotated for shaking the ashes. Grate 38 has a central opening in which it carries a draw grate 39, any usual or suitable means being provided for operating the draw grate 33 a,sos,ss1

in order that the ashes may be readily cleaned out.

The stove, as above described, is complete in itself to provide an effective heating action, with a comparatively large amount of heat radiation. However, the same stove or a similar stove may be used as acirculating type stove by providing it with a readily attachable and removable outer casing which is generally designated by the reference numeral 40. The manufacturer may thus utilize exactly the same parts in the construction of the ash box and the combustion chamber and their contained elements in supplying the trade with either a radiant type stove such as has been illustrated in Fig. 2 or with a circulating type stove such as has been illustrated in Fig. i and in which the outer casing is employed; or one may readily convert the stove from one of the radiant type to one of the circulating type or vice versa merely by applying or removing the outer casing. When the radiant type stove is ash box and preferably substantially flush with the side walls of the ash box so that the elements mentioned form pleasing and harmonious extensions or continuations of one another.

The front of the casing is formed of a plate or stamping 4| having louvres 42 near its lower portion providing air inlet openings. A hole 43 is provided in this front plate, of such size as to surround the door frame 32 with a suitable clearance to permit convenient assembling of the casing unit in its application to the radiating stove. The back plate 44 is also provided with louvres 45, and has an opening 48 in line with the flange 3i through which the smoke pipe 41 or flue may be inserted for attachment to the flange. The upper portions of the front and back plates 4| and 44 are welded or connected tO side pieces 49. The upper portions of the front and back plates together with the side pieces 49 are suitably flanged as indicated at 50 in Fig. 3 to form a top opening receiving the top stamping or plate II which is Provided with openings or slots 52 through which the air which flows up along the hot outer surface of the combustion chamber passes freely out into the space above the stove.

The lower ends of the front and back plates 4| and 44 are provided with upwardly bent extensions or flanges I4 fitting along the inclined upper wall portions of the ash box, and detachably connected thereto as by means of the bolts 55, thus securely holding the casing unit in position on the ash box, with the front and rear walls of the casing unit extending substantially flush with and fitting the ash box not only mechanically but also harmoniously in appearance.

The lateral sides of the casing are formed of side plates 58 and 31, having air inlet louvres 58. Near their upper ends these side plates are hinged to the adjacent portions of the casing unit, so that the side plates are capable of be ng swung outwardly on their hinge axes in order to provide for direct heat radiation in a generally downward and lateral direction from the combustion chamber. In the normal up-' right positions-in which thes side plates are arranged when direct heat radiation is not desired in a generally downward or lateral direction, or towards the floor on which the stove is located, the lower ends of the plates flt against the edge portions of the ash box, the plates being held in such position by suitable fastening means such as spring clips 6| fastened on the sides of the ash box and yieldingly holding the lower ends of the side plates against opening movement. The side plates, however, may be swung open by means of their handles 62, the lower ends of the plates being forced past the spring clips I, so that the side plates assume an inclined position as indicated at the left of Fig. '5. They are held in this position in a yielding manner by means of spring clips 63 which are secured on triangularly shaped wing portions 64 formed preferably as lateral flanges along the upwardly extending edge portions of the side plates. These spring clips yieldingiy engage th vertical edges of the front and rear plates, to retain the side plates in their open positions. The side wings 64 form a lateral enclosure, when the side plates are swung open, preventing thelateral loss of air between the front and rear plates and the side plates. When the side plates are swung open, air can enter through the louvres near the lower portions of the several plates, and flow up along the outer side of the combustion chamber, and can also flow in through the opening provided between the opened side plates and the ash box, so that the stove serves effectively as a circulating stove while simultaneously affording direct heat radiation, especially desirable, for example, for warmin a person's feet, or for drying one's shoes, etc.

It will be apparent that the casing, which may be connected to the ash box merely by a few detachable connections 55 and thus be devoid of connection at its upper portion to any part of the combustion chamber of the radiant stove, may be very readily applied to or removed from the ash box, to surround the upper portion of the radiant stove; The casing maybe applied as an assembled unit, since the front plat has an opening large enough to receive the feed door frame, and the smoke pipe or fine connection 41 is applied through th hole 46 in the rear plate of the casing and slipped over the short projecting flange at the rear of the combustion chamber after the casing has been positioned on the ash box. The construction of the entire stove is such that it embodies only comparatively simple-parts, does not require expensive or heavy castings, may be very readily and. cheaply made and assembled, and provides a stove which is adapted to operate efliciently and to be readily moved from one place to another if a change in its position becomes desirable.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the haven tion which is defined in the appended claims.

'What is claimed is:

1. In combination, a radiant stove complete in itself and adapted for effective heat transmission by direct radiation when used as a radiant stove, a door for said stove, a door frame, means for pivotally supporting said door at one side of said stove on saidfldoor frame with said door projecting laterally a substantial distance beyond the side wall of said stove, a short flue pipe connection for another side of said stove, and a casing readily attachable to and removable from the radiant stove as a unitary assemblage and substantiallysurrounding the upper portion thereof in spaced relation therewith and with its lower end resting on the lower'portion of the radiant stove for converting the radiant stove to one of the circulation type, said casing having an aper-- ture in alignment with said flue pipe providing for access thereto and having a second aperture in alignment with. said projecting door, the wall of. said casing adjacent said, door being located substantially at the hinge line of said door providing for free opening movement of the door in the assembled position of said casing,and the wall of said casing adjacent said flue pipe connection being spaced outwardly therefrom.

2. In combination, a radiant stove complete in itself and having abase, an ashbox in said base, a door for said ashbox, a combustion chamber of lesser lateral extent than said base supported above said base and having a radiating surface adapted for eflective heat transmission by direct radiation when used as a radiant stove, a door frame, a door for said combustion chamber,

d wall of said casing adjacent said door being 10- cated substantially at the hinge line of said door an aperture in alignment with said projecting door for receiving said door therethrough, the

providing for free opening movement of said door in the assembled position of said casing, and

the wall of said casing adjacent said flue pipe connection being spaced outwardly therefrom.

3. In combination, a radiant stove complete in itself and having a base, a substantially rectangular ashbox in said base, a combustion chamber of generally cylindrical shape mounted above said ashbox and providing a radiating surface adapted for direct heat radiation when used as a radiant stove, a door for said combustion chamber, a door frame extending outwardly therefrom, means for pivotally supporting said door at one side of said stove on said door frame with said door projecting laterally a substantial distance beyond the side wall of said stove, and a substantially rectangular casing which at its lower end is readily attachable to and removable from the top of said ashbox substantially flush with the outer walls thereof and substantially surrounding said radiating surface in spaced relation therewith and devoid of connection to the upper portion of the combustion chamber for converting the radiant stove to one of the circulation type, said casing having an aperture in alignment with said pro- Jecting door and adapted to receive the door therein providing for free and unrestricted moveinent thereof in the assembled position of said casing, said casing in the assembled position, thereof being spaced from the side of said stove a distance substantially corresponding to the outward extent of the door frame therefrom.

4. In combination, a stove having a combustion chamber provided with a radiating surface, a casing substantially surrounding said radiating surface in spaced relation therewith and having means at its lower and upper portions for the 4 asaaaer inlet and outlet of circulating air, said casing having a side wall hinged at an upper portion thereof and adapted to be opened outwardly at its lower portion, said side wall having inwardly extending side flanges maintaining a lateral enclosure of the rising current of air when the side wall is open to provide for direct heat radiation from the radiating surface of the stove in a downward and outward direction.

5. A stove as defined in claim 1 including hinge means adjacent the top of the removable casing for pivotally mounting a side wall portion of the casing for pivotal movement about a horizontal axis, said pivotally movable side wall portion being substantially coextensive with the side of said casing and extending from said top portion substantially to the lower end thereof.

BERI'RAND B. KAHN.

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