US3107662A - Space heater stove - Google Patents

Description

Oct. 22, 1963 H. G. GENGE SPACE HEATER sTovE Filed April 4, 1960 taies This invention is concerned with a novel form of device for use by campers or others not only as a cooking stove, but also in the internal heating of tents, and capable of being used in other similar enclosures such as huts used by campers or small out-buildings.

At the outset it may be mentioned that both space heaters and stoves are of course well known, but no construction has so far been proposed embodying the characteristics of both devices into a single unit designed especially for use in tents or the like. For instance, the convent-ional types of space heaters and stoves are more or less of a permanent installation for household requirements. Also the usual stoves and heaters are much too high or large to be suitable for installation in a limited enclosure such as a small hut or tent.

rIihe object of the present invention is to provide a tent or the like space heating stove which is of a compact nature to be capable of easy installation, and be portable.

Generally the invention covers a tent or the like space heating stove having an inner lire or burner chamber with a door-covered access and a waste gases bottom exhaust, an outer surrounding chamber with a cool air bottom inlet and heated air upper outlets, these chambers being of a low compact nature with a flat metal cooking top or hot plate, a cool air funnel adapted to be removably attached to the said inlet and to lay adjacent the ground to the outside of -a tent and a flue adapted to be removably connected to the said exhaust and to lay along the ground to the outside of the tent, whereby cool air may pass along the funnel, be heated in the outer chamber land the heated air pass through the upper outlets, and whereby the Waste gases pass from -the inner chamber through the exhaust and the iiue to the outside of the tent.

The invention will be more fully lreferred to hereinafter .with the aid of the accompanying drawing, in which:

FIGURE l is a view showing the stove installed in a tent or hut,

FIGURE 2 is a sectional elevation, but with I'che cold air inlet not correctly positioned,

FIGURE 3 is a back elevation,

FlGURE 4 is -a sectional plan View, and

FIGURE 5 is a front elevation with the redoor removed.

In further describing the invention, the stove is of a low compact size as for instance one of about fourteen inches in diameter and about ten inches high, but the stove is not limited to these measurements. Slightly smaller or larger types may be produced to suit say small huts.

The inner and outer chambers can be provided by two casings or cylinders 1li, 11, a smaller one arranged within the other, the top plate 12 welded thereto closing the cylinders at this end and providing the cooking surface or hot plate of the stove. Within the outer cylinder 11, which is the peripheral wall of the stove, is provided the access by a large opening 13 over which is hinged the cover or door 14 land strips can be welded or edges of the opening can be inturned across that part of the space between the cylinders to blank oi the outer chamber 11 from the edges of the access opening 13 to the inner chamber 10. Within this chamber are set usual grate bars 15 positioned from below the access across 3`y79652 Patented Oct. 22, 1963 ice to the exhaust, which is a short duct 16 disposed vertically on the inner wall opposite the access opening from a segmental base plate 10 of the inner chamber.

In the outer wall of the stove, just about opposite the access `opening 13 to the inner chamber is provided the air inlet in the form of a socket 17 of about three inches in diameter. The upper air outlets are a number of small holes 1S provided in 4the outer wall just below the top plate 12 and suitably positioned.

The air inlet funnel is an open metal cylinder 19 of a diameter to-t onto the socket 17 and of a length to extend outside the tent or hut. The waste gases or smoke flue consists of a light iron channel 20 with its flanges or edges underneath, having a hole 21 at one end adapted to mate with the bottom of the exhaust duct 16; the flue is of a length to extend outside the tent or hut Iand in its outer end is provided a socket 22 into which is pushed a tapered. chimney 23 which extends vertically to a desired height. The size of lthis iiue and chimney is such as to suit the capacity of the inner chamber of the lire box.

Whilst a stove of circular cross-section has just been described, it may be made of a square or oblong crosssect-ion.

The stove is installed or set in the ground inside the tent and the |air inlet funnel 19 is quickly and easily put in place by disposing it on the ground under the tent wall 24 and at the same time pushing its inner end into the socket 17 provided on the peripheral wall of the stove. lt is impossible for dust from an ash-pit 25 provided under the gra-te to enter the tair circulating system.

The smoke iiue channel 20 is laid flush with the ground from the tire box with its hole 21 aligned with the exhaust duct 16 to the outside of the tent, clear of its wall, by setting channel 2t? in Ia small ditch so that smoke is trunked at ground level. A damper or draft control plate 26 consisting of a fiat piece of tin or steel is positioned across the front of the ditch so that on movement it regulates degree of draft required. The draft control plate 26 is completely separate from the stove proper so that it may be slid back or forth over the front edge of the ash pit 25. The tapered chimney 23 is slipped into the socket 22 at the outside end of the tlue channel and the stove installation is complete. The ditch is blocked between the grate and the liuc automatically by the iiue channelling.

With the stove set at ground level, re started in the lire box 1G, cold air is drawn in through the inlet funnel 19 from outside, the air passing over the walls 10, 11 becomes heated, rises and passes outof the Aupper outlets 18 to circulate about and heat the space inside the tent. The stove being low set will provide plenty of room above it for a clothes-drying rack. The top hot plate 12 can be used for cooking or making toast. The cold air funnel 19, smoke flue 20 and chimney Z3 are not screwed or bolted, but may consist of sections so that they can be quickly and easily dismantled without the use of tools, and these parts fand the stove carried for later use at another camping site.

In areas where lit would be permitted, the digging of the ashpit under the stove would solve the problem of lash disposal, ln the case of camping ground installation which would be on open ground and semi-permanent, the stove would be set on concrete level with the ground surface. A recess under the stove in `the concrete would act as an -ashpit from which ashes could be removed with an ordinary household shovel. lf it was desired to have a readily controlled tire burn all night, a known type of diesel oil burner could be fitted in the lire box.

Finally, the advantages of this stove yare its compactness with portability, minimum of 4working parts, ease of installation, its cooking and space-heating facilities together with the incorporation of a flush iiue with ground level flue which has a flat upper surface to provide extra cooking Aand heating surface. No alteration is required to a tent for use of the stove. The stove lis so designed that it brings in fresh air from outside the tent Wherever the lire is burning. The design of the stove has obviated the usual feature of down-draft lues, i.e., that a large volume of smoke is created inside the tent after kindling the tire and before the flue and chimney create a good draft.

Having now described my invention, what I claim is:

A comp-act camp stove particularly adapted for space heating and cooking Within a tent comprising an inner cylindrical casing of sheet metal forming a lire chamber, an access aperture Within said casing, a hinged door covering said aperture, a segmental base plate mounted across a portion of the bottom end of said inner casing opposite said aperture, a grate comprising a plurality of parallel bars mounted Within the remaining, open portion of said bottom end and extending thereacross, said grate adapted to be disposed over a ground hole serving as an 'ash pit, an adjustable draft plate extending from the bottom of the casing and adapted to cover an edge portion of the ground hole beneath said grate to regulate the draft through said grate into the lire chamber, an exhaust opening in said segmental plate adjacent the inner casing and opposite said aperture, an exhaust duct surrounding said opening and extending upwardly therefrom along the inside of said inner casing to a position spaced below the top edge of the inner casing, said duct constituting a discharge for the products of combustion, a cylindrical outer wall of sheet metal spaced from and substantially surrounding said inner casing except in the region ofthe door-covered aperture therein, said outer Wall therebyk defining -a convection chamber, a flat, circular metal plate closing the top ends of both said inner casing and said convection chamber, said plate forming a rst cooking and heat radiating surface, a cold air inlet socket extending radially through the outer w-all yat the bottom thereof and offset circumferentially from said exhaust duct, a horizontal funnel coupled to said socket, said tunnel being adapted to extend outside the tent at ground level to convey fresh air to said convection chamber, a plurality of spaced holes in the upper edge of said outer Wall for emitting heated air from said convection chamber into :the tent, la channel-shaped flue means below said casing for conveying the waste products of combustion out of the tent, said flue means being adapted to be mounted in a shallow ditch extending to the outside of the tent with the upper surface of said iiue means flush with ground level, the upper surface of said iiue moans being adapted to form a second, distinct cooking and heatV radiating surface inside the tent, means connecting one end of said line rneans to said exhaust duct, and achimney connected to .the other end of said flue means.

References Cited in the file of this patent UNlTED STATES PATENTS 753,104 Pelmulder Feb. 23, 1904 1,000,063 Akin Aug. 8, 1911 1,122,536 Price Dec. 29, 1914 1,348,427 Landers Aug. 3, 1920 2,214,292 Dalzell et al Sept. 10, 1940 2,715,897 Newland et al Aug. 23, 1955

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