Abstract: A combination of a gas stove with oxygen device is provided. The disclosure comprises generally a pair of valves secured to the front side of a gas stove. The valves each has a rotor plug therein and each rotor plug has an elongate shaft axially connected and extended outward through the central hole of the valves with one of the shaft connected to a knob at a free end. Each of the shafts has a gear perpendicularly secured to an appropriately middle periphery and meshed each other. So that the two valves can be operated in concert when turns the knob. One of the valves supplies gaseous fuel and other supplies oxygen to the same burner in proper rate and mixed in the burner before burnt at the apertures. Both the gaseous fuel and the oxygen are supplied via a branched pipe so that they can enter into every portion of the burner.

Abstract: A fireplace having a low density ceramic fiber duct with a first duct portion which promotes secondary combustion of unburned products of combustion and a second duct portion which removes products of combustion from the front of the combustion chamber. The ceramic fiber duct is positioned within the fireplace at a location along the flow path of the products of combustion that is intermediate the fireplace combustion chamber and flue. The first ceramic fiber duct portion includes a number of horizontally spaced and longitudinally extending circuitous, internal passageways which define the flow path as well as segregate the products of combustion. Due to their ceramic fiber construction, the passageways heat up quickly to promote secondary combustion of combustion products therein soon after fire ignition. In addition, the passageways are structured such that the combustion products must cover an extended exhaust path, which lengthens their stay within the heated passageways and promotes secondary combustion.

Abstract: A method and apparatus for reducing particle emissions from combustion processes and increasing combustion efficiency. A high voltage electrical potential is passed through a combustion flame to agglomerate particles, which are then removed from the exhaust gases through combustion or deposition on nearby surfaces of the apparatus. It is believed that application of high voltage electrical potential increases movement of the ions and free electrons within the combustion flame, causing increased oxygen mixing, and combustion efficiency. In one embodiment of the invention, a high voltage electrical potential is applied to the combustion flames of a wood stove and secondary air is supplied in the vicinity of the upper periphery of the flames. Application of the high voltage electrical potential and secondary air dramatically reduces particle emissions produced by the wood stove.

Abstract: Modular discharge structure for closed gas appliances having an inner end and an outer end, comprising: an outer tubular casing; an inner gas exhaust pipe, being placed inside the casing to define an annular supply line for combustion air therewith; a combustion air supply hood, forming a connection between the outside air and the annular supply line, and a combustion gas exhaust hood, forming a connection between the outside air and the gas exhaust pipe, and further comprising retaining means for axially keeping together, in series and in a mechanical and releasable manner, the casing, the combustion gas exhaust hood and the combustion air supply hood on the gas exhaust pipe.

Abstract: An indoor fireplace comprises a base, a feeding device, a combustion chamber, and a ventilation device. The base has a sliding plate provided with a feeding pipe in communication with the combustion chamber. The ventilation device comprises an air drawing apparatus, an air discharging apparatus, and a plurality of air circulation ducts.

Abstract: The invention concerns a thermostatic air flow controller. Such flow controllers may be specially useful for controlling the intake of air to a heating stove. The controller has a main air passage with a set of matching register plates which may open or close the passage according to the influence from a temperature sensing element, which is placed in a secondary air passage. The controller according to the invention has this temperature sensing element placed close to the register plates and between those plates and a heat shield which guards the temperature sensing element from the influence of the temperature in the air receiving vessel. This configuration admits a very compact construction which is specially useful for mounting the flow controller on the intake opening of a heating stove.

Abstract: A heating appliance has a firebox and an ash chamber. A primary preheating chamber is located beneath the ash chamber. The preheating chamber is U-shaped in cross section and raised portions or arms extend upwardly and define opposite sides of the ash chamber. The upper flat surfaces of the arms serve as mounting blocks to support a grate above the ash chamber.

Abstract: A stove (1) for the combustion of solid fuel (4), such as wood, a fire box within the stove forming the combustion chamber (2) for the fuel is provided with a hollow hood (20) extending over the combustion chamber. A primary air inlet (7) and channel provide a supply of air to the combustion chamber for primary combustion and a secondary air inlet (9) and channel provide a supply of air to the hollow hood (20). The hollow hood has a multiplicity of air exit apertures (32) distributed across the lower surface (25) of the hood to provide air for secondary combustion in the upper region of the fire box. A flue gas exit orifice (36) is provided in the hood, the orifice being defined by a hole in both the lower surface (25) and upper surface of the hood, the holes being connected by a wall or walls (37) with a plurality of apertures (39) therein. Air is thereby supplied to the flue gases (10) exiting through the orifice (36) enabling secondary combustion to occur in the orifice.

Abstract: The invention is directed to a balanced flue or direct vented, solid fuel burning fireplace which may be installed in a building and is operable at energy input levels greater than 75,000 BTU/hour. An enclosure including a top wall, bottom wall and four side walls defines a combustion chamber. At least one of the side walls includes an operable, sealed, transparent access door. A flue is connected to the enclosure and disposed in fluid communication with the combustion chamber and an outside ambient environment external to the building. A combustion air duct is connected to the enclosure and disposed in fluid communication with the combustion chamber and the outside ambient environment external to the building, whereby substantially all of the combustion air supplied to the combustion chamber flows through the combustion air duct when the access door is in a closed position.

Abstract: The space heating system has a stove (1, 2) with a sealed combustion chamber (3); air is heated in the stove in a heat exchanger (12) therein, and heated air is conducted through hollow blocks (80) of chamotte arranged, for example, as heating panels, heated walls, benches, floors or the like. The hollow blocks are formed, internally, with projections or obstructions (83) to increase heat transfer, and may be faced at the outside with decorative tiles. To seal the combustion chamber, a vertically movable panel, typically of fire-resistant glass, is slidably located in front of a fuel inlet opening (7). In operation, the panel is sealed, so that the combustion chamber (3) will receive air only under controlled conditions, in two air paths; a primary air path supplies air to a narrow space (22) below a fuel support grate (25), after being preheated by passing around an ash receiver (18); and a secondary air flow, passed through ducts (30) within the combustion chamber, and ejecting air towards the panel.

Abstract: A fireplace assembly of the type used as a room air heater comprises a second pane of glass in front of and spaced from the glass pane forming the front of the combustion chamber. The two panes form an air passageway for delivering intake air from an upper vent to the bottom of the combustion chamber. The intake air cools the panes of glass such that a relatively inexpensive glass material can be used and such that the front of the fireplace assembly is relatively cool to the touch.

Abstract: A stove (1) comprises a fire-box (4), and an ash-chamber (5) separated by a grate (19). Air intake means (21,23) is provided beneath the ash-chamber. Air supply means (30) connected to the air intake means extends vertically past the ash-chamber and the fire-box to an upper region of the fire-box. Air delivery means (27) provides communication between the air supply means and the fire-box. In use fuel burning inside the fire-box causes external air to be drawn into the air intake means, through the air supply means and through the air delivery means to a region above fuel in the fire-box. External air is pre-heated by passing underneath the ash-chamber and past the ash-chamber and the fire-box during its passage into the fire-box. Turbulence caused by an interaction between pre-heated air entering the fire-box and heated air already present causes smoky combusted air (F) to be pushed away from a dose (35) at the front of the fire-box.

Abstract: A unitary furnace through which air is circulated for heating purposes is disclosed. A blower forces air through a number of heat exchange tubes horizontally positioned within the combustion chamber for space heating purposes. Another blower is provided for the delivery of air to the burning material disposed upon a fuel support frame within the combustion chamber through an air distribution manifold. The manifold is fitted within the combustion chamber and has a number of air discharge openings positioned above and below the fuel support frame. These openings are oriented and arranged to direct the air passing therethrough generally inwardly toward the fuel on the fuel support frame. An electrical circuit including temperature sensors is provided for regulating air flow from each of the two blowers. One sensor is positioned in the furnace flue outlet and the other sensor is positioned exteriorly of the furnace in the space to be heated.

Abstract: An improved wood burning heating unit which possesses a trapezoidal housing including a fire box portion possessing in a combustion zone a fire brick grid for supporting fuel wood. An air duct extends beneath the fire brick grid, upwardly along a back portion of the heating unit, and terminates in fluid communication with a helical heat exchanger section. The heat exchanger section surrounds a central chimney including an open upper end and an open lower end selectively closable by a damper. An outside air T connection includes a first leg connected to an outside air inlet, a second leg communicating with the chimney, above the heat exchanger section, and a third leg connected for directing combustion air to the fire box. The outside air T connection also includes a pair of air pressure actuated flapper valves for regulating combustion air flow depending upon conditions within the fire box.

Abstract: A solid fuel burning stove includes a firebox having front side and rear walls, a top and a bottom, and a secondary combustion unit formed from high temperature insulative refractive material mounted on the top and rear wall of the firebox. The unit is connected to the firebox by a mouth located in the rear wall adjacent the floor of the firebox and by a perforated plate on the firebox top wall. A vertical combustion passage extends from the mouth up to a mixing and combustion chamber located in the unit above the top wall of the firebox. The secondary combustion unit efficiently burns secondary combustion gases flowing into the unit through the mouth and plate during different stages of burning solid fuel, particularly wood.

Abstract: There is disclosed a refractory baffle for use in a fireplace which dispenses, via apertures provided therein, preheated combustion air over the central combustion zone of the fireplace. The refractory material substantially avoids warpage, flame quenching and other limitations associated with metal baffles.

Abstract: A combustion device is described by several embodiments to enable efficient, clean burning of fuel in combustors. In stove and fireplace embodiments, primary, secondary and tertiary air supplies are provided within a firebox at selected locations relative to an upwardly inclined baffle to maximize combustion of particulates and gases. The primary air feed includes openings above the intended coal bed and includes an intake partially spaced from the firebox to maintain incoming primary air cool and oxygen rich, and to avoid direct impingement with the fuel bed. Secondary air is provided adjacent a forward downturned end of the insulated baffle to produce turbulence and supply oxygen to support combustion adjacent to baffle edge. Tertiary air tubes receive air from side chambers that in turn are connected to air delivery ducts situated with respect to the firebox to maintain incoming airstreams just under the baffle.

Abstract: Particulate emissions from a wood fire in a fireplace having a baffle for preventing the direct flow of fluid into the flue from the wood fire are reduced by locating a hydrocarbon gas pilot source in proximity to the baffle. Ignited gas from the pilot combines particulate emissions from the wood fire while they are in the fireplace and before they reach the flue. Air from outside of the fireplace is supplied into proximity with ignited pilot gas so the outside air and the ignited pilot gas mix. A flame sensor for the pilot controls the flow of gas to the pilot source and ignition of the pilot source.

Abstract: An air guide element is installed between air supply vent and the inside of he door of the heating appliance which consists of an adjustable damper for regulating the supply of secondary combustion air and ballast air in the appliance and in which at least one heat sensitive element is connected between said damper and one of the components of the heating appliance which serves to adjust said damper, which element reacts to the prevailing temperature in the combustion chamber of the appliance.

Abstract: A high efficiency clean burning fireplace for burning solid fuels at pyrolytic temperatures is provided with refractory walls maintained about 1100.degree. Fahrenheit at different burning rates. A top wall of the combustion chamber includes an exhaust stack and a primary air heat exchanger having an exhaust manifold for discharging primary preheated combustion air down and across the inside surface of glass panels in the doors of the fireplace. A secondary air heat exchanger is mounted below the primary air heat exchanger and separated therefrom by a top refractory panel in the combustion chamber. The secondary air heat exchanger exhaust manifold is in the combustion chamber and discharges secondary combustion air across the top of the combustion chamber and into the primary combustion air creating a high turbulence and complete burning of the secondary production of combustion while heating the refractory walls above a pyrolytic temperature at different burning rates.

Abstract: A portable camp stove is disclosed. It consists of a frusto-conical main body, a preheating chamber, and spiral flue chambers. The stove may be placed over a fire in a pit in the earth, or the stove may completely contain a fire within it when its bottom plate and legs are attached. Other accessories of the stove include a stovepipe and oven combination, a water heating system, and a grill and a rotisserie.

Abstract: A single chamber wood stove has primary and secondary combustion zones in direct fluid flow communication with each other. Air from outside the stove is supplied to the primary and secondary combustion zones. Gaseous hydrocarbon fuel from a source located outside the stove is selectively supplied to the secondary combustion zone and is ignited by a glow plug in the secondary combustion zone in response to a signal derived by a temperature detector in the secondary zone. The gaseous hydrocarbon fuel flows to the secondary combustion zone at a rate in the range of about 0.25 to 3 cubic feet per hour. The fuel is supplied to the secondary zone when the secondary zone temperature is above carbon monoxide ignition temperature.

Abstract: A stove for burning solid fuel, such as coke or coal, comprises a feed hopper for storing a stock of fuel and a supporting member for supporting fuel present in a fireplace. The feed hopper is in communication near its lower side with the space incorporating the fireplace via a downwardly sloping fuel supply channel. The boundary walls of the channel are arranged one above the other. A passage is provided for the supply of primary combustion air near the lower side of the combustion chamber. An inlet passage for the supply of secondary combustion air is provided above the combustion chamber. The primary combustion air is sucked-in with the aid of a fan disposed upstream of the combustion chamber. The passage for supplying the primary combustion air is automatically closed by a valve when the fan is made inoperative.

Abstract: A solid fuel burning stove of the present invention includes an internal combustion chamber, a primary air feed to the combustion chamber and a heat exchanger above and providing a secondary heated air feed to the combustion chamber. This secondary air feed raises burning temperatures and reduces pollutants from the exhaust of the stove. The heat exchanger itself has a horizontally layered substantially closed box-like construction including a heated gas outflow layer fed by the hot exhaust gases from the combustion chamber, at least one secondary air inflow layer into which secondary air is drawn from outside of the stove, a heat exchange wall between and isolating the gas outflow layer from the secondary air inflow layer and an air feed from the secondary air flow layer to the combustion chamber. The heat exchanger further includes an exhaust stack receiving opening for fitting an exhaust stack with the gas outflow layer without penetrating the secondary air inflow layer.

Abstract: A pellet burning stove includes a firebox defining a combustion chamber, a pellet burner located within the firebox, a feed system for moving combustible pellets to the pellet burner and an ash pan for receiving ashes from the pellet burner. The pellet burner includes a horizontal surface having an elongated combustion zone defined by a plurality of primary air openings in the burner surface, and a feed surface adjacent to the combustion zone. The feed system moves a thin layer of combustible pellets across the feed surface into the combustion zone. An air plenum surrounding the feed surface of the pellet burner supplies combustion air upwardly through the primary air opening and the layer of combustible pellets. The air plenum maintains the pellets relatively cool until they reach the combustion zone. Ashes drop off an edge of the burner surface into an ash pan. An artificial log set and a log support member fabricated of refractory fiber material define a secondary combustion cavity above the pellet burner.

Abstract: The invention relates to a combustion device for wood or coal comprising a front wall with a fuel charging opening, two side walls, a rear wall, a bottom wall, a top wall, a door for the fuel charging opening, a control element for controlling a fresh-air inlet opening, an inner dividing wall which divides the interior of the device into a pre-combustion chamber and a post-combustion chamber, and a passage opening between the two chambers and a grating at the bottom of the pre-combustion chamber and a flue gas discharge opening; the dividing wall is horizontally disposed and a shaft pipe surrounded by an annular chamber which is in communication with the fresh-air inlet opening is inserted sealingly into its passage opening; the grating is placed on its upper end.

Abstract: A pellet stove has an arrangement for improving the flow of air therethrough. Air entering the stove is split into first and second portions. The first portion is diverted upwardly through a combustion chamber, wherein pellets are burned, thereby aiding in the burning of the pellets. The first portion of air then exits from the combustion chamber. It is directed to a rear of the stove through a heat exchanger where a flue exhaust is located. The second portion of air has three parts. The second portion of air is simultaneously diverted upwardly around the hopper and auger mechanisms, whereby the mechanisms and the pellets therein are cooled. One part of the second portion of air then is received in the flue exhaust so that this one part of the second portion of air exits the stove, creating a negative pressure in the combustion chamber.

Abstract: A combustion device is described by several embodiments to enable efficient, clean burning of fuel in combustors. In stove and fireplace embodiments, primary, secondary and tertiary air supplies are provided within a firebox at selected locations relative to an upwardly inclined baffle to maximize combustion of particulates and gases. The primary air feed includes openings above the intended coal bed and includes an intake partially spaced from the firebox to maintain incoming primary air cool and oxygen rich, and to avoid direct impingement with the fuel bed. Secondary air is provided adjacent a forward downturned end of the insulated baffle to produce turbulence and supply oxygen to support combustion adjacent to baffle edge. Tertiary air tubes receive air from side chambers that in turn are connected to air delivery ducts situated with respect to the firebox to maintain a desired range of 250.degree.-650.degree. F. of incoming airstreams admitted by the tubes just under the baffle.

Abstract: A pollutant-controlling combustor assembly for use with a fuel-burning room heater includes at least two combustors through which gaseous combustion products are routed before being discharged into the atmosphere. Each combustor has a downstream side through which combustion products exit the combustor, and the combustors are arranged so that the downstream side of each combustor is fully exposed to the downstream side of every other combustor in the assembly. In addition, the downstream sides of the combustors are positioned about a common space so that combustion products which exit the downstream sides of the combustors enter the common space.

Abstract: A controller for automatically regulating the supply of secondary combustion air to woodstoves and small furnaces. The controller includes a movable air valve for controlling the amount of secondary air admitted into the chamber. A self powered means monitors the concentration of combustible gases and vapors and actuates the movable air valve to increase the supply of secondary air in response to increasing concentrations of the combustible gases and vapors. The self-powered means can be two fluid filled sensor bulbs, one of which has a coating of a combustion catalyst. Alternatively, the self powered means can be two metallic stripes laminated together, one of which is coated with a combustion catalyst, and when heated, causes the air valve to actuate.

Abstract: A resistance heater heats air forced by a fan into a woodstove secondary combustion chamber having an ignitor. The fan, heater and ignitor are controlled by a temperature sensor for gas flowing from a primary combustion chamber to a secondary combustion chamber. Two ignitors, extending through the stove back wall into the secondary combustion chamber, are controlled by the temperature sensor.

Abstract: A heater for the burning of wood or other similar fuels in a fire box. The fire box has a door at the front, there being a primary air inlet to the fire box above the door. The fire box also has a secondary air inlet at the rear and a tertiary inlet at the top. The heater has a double skin so that all air for the secondary and tertiary inlets passes between the two skins so that it is pre-heated.

Abstract: The specification describes a system for initiating and promoting combustion of fuels such as wood, coal, oil, etc. Virtually complete combustion is achieved by feeding combustion air under pressure through openings in a diffuser plate with the diameter of the opening having a calculated size and spacing therebetween. By-products of primary combustion are burned by the system. The specification also describes an exemplary wood stove and a cooking unit which utilizes the novel combustion principle.

Abstract: A heater for burning combustible pelletized fuel. The pelletized fuel is delivered at a controllable rate to a double-walled burn pot in an enclosed combustion chamber. Combustion air is injected into the combustion chamber at a pressure higher than the ambient air pressure surrounding the heater. Combustion air is injected between the walls of the burn pot through ports in the inner wall into the fuel at or slightly below the top of the fuel level. Additional combustion air is injected approximately horizontally across the top of the burn pot through an injection air manifold. Crossfire injection air is injected approximately vertically about the periphery of the burn pot, confining fumes and exhaust air directly above the burn pot. Heated exhaust gasses rise to the top of the combustion chamber and are drawn from the combustion chamber through a heat exchange unit surrounding the combustion chamber. The exhaust gasses are drawn from the combustion chamber by suction created by and extraction air mechanism.

Abstract: A sheet metal constructed modular pack kitchen including utility tables, sinks and cabinetry, along with an airtight wood stove and flue-mounted oven. When disassembled, the components self-store in nested relation within one another. The stove includes an airtight non-warping cook top, hollow double bottom, hinged hot water tank and supports a double-walled, damper-controlled oven and warming shelf. Slip-mounted, interlocking cook top and flue/oven sections provide a knock-down, airtight construction.

Abstract: Heating stove which permits essentially two modes of combustion: (a) upwards combustion i.e. with combustion air entering from beneath the grates. (b) downwards from the combustible material i.e. the combustion air enters from above the hearth so that the combustion gases pass downwards through the grates. The modes of combustion being regulated by a device of flaps.

Abstract: A stove with a continuously open draft provides a fire chamber peripherally configured to cause circular motion of burning gases therein to provide substantially complete combustion of fuel. A continuously open elongate draft vent is positioned above and immediately inwardly of a door window to aid cleaning of that structure and to reinforce the circular motion of combustion gases. Baffles and exhaust dampers also are configured to aid the circular motion of combustion gases in the fire chamber. Heated surfaces defining the upper fire chamber walls catalyze the combustion reaction and rearward surfaces reflect radiant energy back into the combusting fuel to further aid combustion.

Abstract: A solid fuel burning space heating appliance comprises a combustion chamber including front, side and rear walls, a top and a bottom. An apertured grate arrangement is provided in the combustion chamber for supporting solid fuel. An ash collecting region is located under the grate arrangement, with an air inlet for providing combustion air. A first air outlet in the combustion chamber is located below the grate arrangement, and a second air outlet in the combustion chamber is located above the grate arrangement. An air diverting arrangement is provided for selectively diverting air from the air inlet between the first and second air outlets. A glass cleaning system provides a vertical curtain of air over the interior surface of a glass panel. The glass cleaning system includes an air supply adjacent one side wall, an air reservoir connected to the air supply and a dam defining a tapered outlet slot for providing the curtain of air from the air reservoir.

Abstract: A wood burning stove incorporates a catalytic cell for reducing exhaust emissions from the stove. A pair of heat shields are spaced from opposing surfaces of a combustor to exchange thermal radiation with the combustor. The combustor is oriented at an acute angle to enhance the combustor life. One of the heat shields also functions as a deflector for deflecting exhaust toward the combustor. A secondary air unit supplies secondary air to the vicinity of the combustor. A dynamic grate assembly is employed to prevent under firing of the firebox.

Abstract: A solid fuel heating apparatus including a secondary combustion chamber in gaseous communication with a primary combustion chamber for increasing heating efficiency and for reducing polluting emissions. The secondary combustion chamber is lined with a refractory material. The entrance to the secondary combustion chamber is disposed at the bottom thereof adjacent the grate, and the grate containing the fuel is sloped at an acute angle with respect to the vertical to cause charcoal to accumulate adjacent to the orifice and to cover the entrance orifice of the secondary combustion chamber. Exhaust gases drawn into the secondary combustion chamber must first pass through the charcoal so that they are preheated prior to being mixed with secondary air. Means are provided for metering secondary air into the entrance orifice to cause mixing of the secondary air with the exhaust gases when the exhaust gases are at their maximum temperature.

Abstract: An improvement in a woodburning stove of the type including an exhaust flue opening; a combustion chamber for primary combustion, having an access door, a support for wood to be burned and a primary air inlet means for supplying primary air to support primary combustion of the wood to produce flue gases containing combustible particulate material; conduit means for directing the flue gases from the combustion chamber to the flue opening in a preselected path; and, secondary combustion means for burning the particulate material in the flue gases before the flue gases pass through the exhaust flue opening.

Abstract: The invention relates to a masonry fireplace, particularly a baking oven, comprising: a furnace (4) in which the fuel is burnt and the bottom of which is formed by a baking grate (5), the furnace (4) being provided with an oven door (1) positioned in the front wall of the oven; an ash chest (7) positioned below the furnace (4) and provided with an ash door (2); a secondary fire chamber (10) positioned above the furnace (4) and into which a throat (9) leads from the back portion of the furnace (4); and substantially vertical cheek flues (15) extending downwards from the secondary fire chamber (10) on both sides of the oven door (1).

Abstract: A wood burning air augmented stove for reclaiming heat from the discharge gases employing a plurality of spaced catalytic combustors, one combustor being detachably mounted on the edge of a smoke baffle, and another combustor being positioned in a portion of the chimney flue which may be selectively moved from a gas intercepting position to a gas bypassing position. The catalytic combustors are so arranged that if one combustor is overheated, the second combustor will provide the additional gas heating and cleansing function needed. These combustors act in series to magnify temperature and heat increases.

Abstract: A wood-burning stove comprising a body providing a primary combustion chamber and a secondary combustion chamber, primary air supply means to supply preheated air at lower and intermediate levels of the primary chamber, secondary air supply means to supply preheated air to the secondary chamber, and temperature actuated control means to regulate the supply of primary combustion air based on the temperature of flue gases entering the secondary combustion chamber.

Abstract: A combustion apparatus for burning wood or coal comprises a cooking enclosure mounted above a combustion chamber enclosure. An upper space of the combustion chamber enclosure contains a combustion chamber having a floor and walls made of refractory material. The combustion chamber is closed all around except for the top. A plurality of primary air holes are provided in the floor of the combustion chamber and a plurality of secondary air holes are provided through the combustion chamber enclosure at the level of the open top of the combustion chamber. An ash pan is mounted for sliding into the combustion chamber enclosure below the combustion chamber to act as a regulator for air entering the combustion chamber enclosure. A cooking plate is pivotally mounted in the cooking enclosure so that it can be lowered into a cooking position over the open top of the combustion chamber.

Abstract: An improved coal stove grate including a floor and side walls to either side of the floor. Coal is pushed along the floor, up a rise surface, past a crest at the end of the rise surface and along a fire support section to the end of the grate. Part of the coal forced up the rise surface rolls back to fill a reservoir space in the grate and fuel a fire extending the full length of the grate during heating and a stable long-burning fire during turndown of the stove.

Abstract: A pyrolytic self-clean gas wall oven having a bake and broil burner wherein a baffle separates the secondary air supply for the bake burner from the broil burner primary combustion air flow path so that, when the broil burner is off, combustion products from the bake burner are prevented from recirculating back to the bake burner via the broil burner and its primary combustion air supply path. Further, the oven has fans for moving cooling air around the outside to limit the external surface temperatures. The cooling air and the combustion air have independent flow paths so that the flame characteristics are not affected. The oven may have two oven compartments each with its own bake and broil burners.

Abstract: The present invention relates to a gasification burner for heating apparatus (boiler, hot air generator or the like) which uses solid fuel. The gasification burner is placed generally at the center of the hearth of the heating apparatus to achieve gasification of the solid fuel before its transformation into charcoal or coals.

Abstract: A stove for burning fuel in which secondary air is introduced and mixed with the products of combustion in a firebox with primary air, the secondary air being kept from the firebox by a gravity-induced downward movement owing to the greater density of the secondary air-combustion products mixture as compared with the products of combustion per se.

Abstract: A self-contained, free standing, on-demand, woodburning furnace including a firebox (52), including means to force combustion gases through a manifold (68), a hot air gathering plenum and means to selectively force feed the fire (34, 36, 38, 40, 68) and draw heated air from the furnace (8, 10, 12, 14).