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 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 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: A universal fireplace is provided as standard prefabricated substantially hollow rectangular prism shaped frame adapted to support all six walls of the universal fireplaces supported on the hollow rectangular prism shaped frame. The top wall is adapted to support the exhaust stack and the bottom wall is adapted to support the fire brick for the fire chamber. At least one of the sidewalls comprises a pair of glass doors supported by edge frame means pivoted on upper and lower side support panels which are mounted on said hollow rectangular prism shaped frame.

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: A zero clearance fireplace of the type to be installed inside of a building against or near an outside wall is provided. The box shaped fireplace is provided with four substantially vertical walls, a top wall and a bottom wall. The bottom wall comprises an inner plenum and an outer plenum below the combustion chamber. The rear wall comprises an outer plenum connected to the bottom plenum of the bottom wall, a middle plenum connected to a source of fresh air and connected to the inner plenum of the bottom wall and an inner plenum which is connected to a horizontal exhaust pipe which is inserted through the outside wall and is connected to the combustion chamber through a baffle arrangement.

Abstract: A wood stove is described having a firebox with a baffle mounted therein that extends forward from a rear wall terminating in a forward edge spaced from a front wall. The wood stove has a front opening with a door thereon that includes a window enabling visual observation of the fire in the fuel combustion chamber. Air is emitted into the front wall and is directed downward in a thin laminar flow over the glass to wash the glass and to create a flow of air and gases downward along the front wall, rearward along the bottom wall, upward along the back wall and forward along the baffle in somewhat of a circular flow. The firebox is mounted on a pedestal with a primary air supply means drawing air through the hollow pedestal to an intake within the hollow pedestal for directing air through a channel to the back wall. The back wall includes a diffuser plate for directing air into the fuel combustion chamber to wash the fuel from the rear to assist in primary combustion.

Abstract: Stove for burning solid fuels, particularly wood. The stove has a pedestal which has a primary air inlet and an ash drawer; an upright rectangular main housing which is divided internally into a fire box section and a section for combustion products; a housing for electrical components on the back of the main housing; and a flue. The partition between the fire box and the top portion has a first passageway with a catalyst therein and a damper-controlled bypass passageway. Primary air is admitted beneath the grate and passes upwardly therethrough. Secondary air is admitted to the fire box near the glass-panelled charging doors for solid fuel. The stove has a catalyst chamber for completing combustion of the incompletely burned gases in the fire box.

Abstract: A ventilating duct system including a plurality of ducts are disposed about an oven door on the face of an oven. Each duct includes a plurality of spaced openings to allow cool air from a source of cool air to be directed about the oven door. A first air feed duct extends from a distribution box to one corner of the duct system to direct cool air into a pair of ducts that meet and are connected at that corner. A second air feed duct is similarly connected to the other pair of ducts and to the distribution box. An infeed duct directs air to the distribution box. If desired, a control duct can be disposed in each of the ventilating ducts. The control ducts would be connected to the distribution box to receive the cool air therefrom and would be formed with spaced openings and would be movable from a position with its openings aligned with the openings in the ventilating ducts to facilitate the flow of cool air therefrom to positions out of alignment therewith.

Abstract: A wood stove with glass panels for viewing of the fire therein includes a glass cleaning system with a number of features which in combination effectively prevent soot and creosote buildup. A uniform curtain of hot air is directed downwardly over the glass panels to maintain the interior surface at an elevated temperature and form a barrier to prevent soot and creosote buildup on the glass panels. The curtain of hot air is supplied by a system of interior manifolds, including a first air reservoir manifold and a second manifold positioned above the glass panels for reducing turbulence and forming a uniform laminar curtain of air. Hot air is delivered symmetrically to the air reservoir manifold from side manifolds. In addition, the glass cleaning system includes dual pane glass to help maintain the glass interior at an elevated temperature and andirons to prevent the wood from blocking or deflecting the curtain of hot air.

Abstract: A stove to burn solid fuels, said stove comprising a combustion chamber with a front (13) with a fuel charging aperture (14) therein and a door (3) with a transparent viewing panel (33) therein mounted over the aperture (14), a baffle (15) dividing the interior of the combustion chamber into a primary combustion zone (A) and a secondary combustion zone (B), a closeable port (16) in the baffle (15) connecting the primary and secondary combustion zones, a combustion gas discharge port (17) to atmosphere from the secondary combustion zone, a gas screen (24) in the gas path between the primary and secondary combustion zones, the gas screen being constructed from materials that will glow at a temperature below the ignition temperature of combustion gases, primary and secondary combustion air inlets (22 and 30) discharging into the combustion zone adjacent a top edge of the door panel (33) and the gas screen (24) respectively, manually resettable temperature actuated flow control means (34) regulating the amount of

Abstract: This stove is divided by a partition into a lower, combustion chamber, and an upper chamber which communicates directly with an exhaust opening in the stove. A catalytic converter is removably mounted in an opening in the partition. A by-pass damper, which is connected to the stove door, is normally held closed over a by-pass opening in the wall of the lower chamber, when the door to the stove is closed, whereby all combustion gases from the lower chamber must pass upwardly through the converter and the secondary chamber to the exhaust opening. When the stove door is opened, the by-pass damper tilts by gravity into an open position so that combustion gases from the lower chamber pass directly to the exhaust opening rather through the upper chamber, and rather than being accidentally discharged out of the open door. The converter causes all by-products of combustion to be subjected to a secondary combustion in the converter before passing to the exhaust opening.

Abstract: A freestanding stove is provided including an elevated firebox mounted atop a tubular pedestal having a horizontally enlarged downwardly opening hollow base at its lower end. The firebox includes a combustion air inlet opening downwardly into the pedestal and the lower end of the pedestal opens downwardly into the hollow base which includes a damper for controlling the flow of combustion air from within the hollow base into the lower end of the pedestal. The base includes feet supporting the base a spaced distance above a horizontal surface upon which the feet rest and the feet are removable whereby the base may rest directly upon and over a horizontal support surface upwardly through which a combustion air opening is formed. The front of the firebox includes an openable transparent window equipped door and combustion air inlet passage structure for sweeping curtains of combustion air across the inner surface of the window from selected marginal portions thereof.

Abstract: The wood burning water heating means of the present invention utilizes a firebox having a grate adjacent the lower end and a flue opening positioned downward from the upper end thereof. The flue extends into the firebox so as to deflect rising hot gases prior to their exit through the flue opening. A main draft opening provides communication of air below the grate to provide oxygen for the fire. A secondary draft opening is provided above the grate for introducing air in such a manner that oxygen will be provided immediately below the flue to facilitate combustion.

Abstract: The door handle of a heating unit is cooled by providing a duct traversing the interior of the handle from exterior of the firebox of the heating unit to the interior of the firebox. The induced flow cools the handle and provides cool air in the firebox to trap and maintain the hot gasses closer to the fire for a more complete combustion. An open, ellipsoid, spiral coil surrounds the grip of the handle.

Abstract: A wood stove has primary and secondary air regulator doors at the bottom and top, respectively, of the stove door each rotating about the axis of a tightening knob in the center of the door opposite a baffle plate that defines with the door inside an air channel open at the top and bottom.

Abstract: A stove (10) for burning combustible solid fuels (64) comprising an enclosed firebox (16), a baffle (54) dividing the firebox into a lower combustion chamber (18) and an upper chamber (20) spaced from the front wall (36,46) of the firebox to permit combustion gases to flow from the combustion chamber into the upper chamber, a door (24) for facilitating introduction of solid fuel into the combustion chamber, an outlet flue (48) communicating with the upper chamber for withdrawing combustion gases from the firebox, a viewing window (38) in a wall of the firebox for enabling the fire to be viewed without opening the door of the firebox, an air inlet (72) for admitting a flow of air into the firebox and means (84) for splitting a flow of air admitted through the air inlet into first and second portions and for directing the first portion toward the bottom of the combustion chamber and the second portion into a stream of hot combustion gases passing from the combustion chamber to the upper chamber; a shroud ( 50)

Abstract: A wood-burning stove includes side walls joined together in an airtight manner to form a firebox and a heat chamber thereabove. The firebox contains upstanding rails to support wood logs for combustion. Streams of heated air are discharged from a manifold that extends from rail-to-rail outwardly from one terminal end of each rail between opposite side walls of the stove. A plate is adjusted to control the flow of air into the manifold. An access door has openings in a spacer side wall for supplying air as desired to the firebox. The spacer walls of the door support a glass panel at an outwardly-spaced location from a deflector to prevent deposits of creosote and other materials on the glass.

Abstract: A freestanding stove is provided including an elevated firebox mounted atop a tubular pedestal having a horizontally enlarged downwardly opening hollow base at its lower end. The firebox includes a combustion air inlet opening downwardly into the pedestal and the lower end of the pedestal opens downwardly into the hollow base which includes a damper for controlling the flow of combustion air from within the hollow base into the lower end of the pedestal. The base includes feet supporting the base a spaced distance above a horizontal surface upon which the feet rest and the feet are removable whereby the base may rest directly upon and over a horizontal support surface upwardly through which a combustion air opening is formed. The front of the firebox includes an openable transparent window equipped door and combustion air inlet passage structure for sweeping curtains of combustion air across the inner surface of the window from selected marginal portions thereof.

Abstract: A log-burning stove having a stove door with an angled plate element secured thereto, the top portion of the plate element deflecting combustion gases inwardly to the combustion chamber, and the lower portion deflecting draft air inwardly and downwardly into the combustion chamber, the plate element also forming a log-support and log-sliding surface.

Abstract: A solid fuel furnace is disclosed as including a firebox disposed inside of a heating chamber through which air to be heated is passed. A pair of baffles guides the air through the heating chamber to progressively heat the air. In addition, an auxiliary air system is provided to inject air into the fire when there is a heating demand to increase combustion and provide more heat when it is most needed.A modified solid fuel furnace is also disclosed which includes a combustion chamber having a door designed to prevent flash-back when the door is opened, a valve for preventing a flow of combustion air to the combustion chamber when the temperature in the combustion chamber rises above a present level, and a manual override for the valve.

Abstract: A device for preventing blow back through the fuel loading door in stoves or heaters in which the rate of combustion is controlled by restricting the supply of air to the combustion chamber. When the stove is burning during normal operation the fuel loading door is closed and an air inlet to the combustion chamber is blocked by a pan member of the outer cabinet door. A thermostatic damper controls the rate of combustion in the combustion chamber by restricting the quantity of air supplied via other air intakes. When the outer cabinet door is opened to gain access to the fuel loading door, the pan member on the cabinet door is moved away from the air inlet to the combustion chamber thereby allowing additional air to enter the combustion chamber via the air inlet to the combustion chamber. The additional air supplied via this air inlet increases the rate of combustion prior to the opening of the fuel loading door.

Abstract: The present invention relates to a processing chamber which is suited for the processing of food, for example meat or meat products, by smoke or steam, comprising at least one unit for the generation of steam and/or smoke and/or for the cleaning of the chamber. The invention consists in that at least one of these units and/or a fan is arranged in the door (1) of the chamber or on the inside or outside of said door.

Abstract: A hot air furnace has an outer housing and a firebox positioned within the housing. A space between the outer housing and the firebox defines a pre-heating chamber which communicates through an air distribution blower to a lower chamber and an upper chamber within the housing. The walls of the firebox are hollow and open into the lower chamber and the upper chamber so that air extracted by the distribution blower from the pre-heating chamber and directed into the lower chamber is heated as it is channeled up through the hollow walls of the firebox prior to entering the upper chamber. A smoke chamber is located within the upper chamber and it serves to further heat the air entering the upper chamber. A combustion air blower is provided and it together with the distribution blower is automatically controlled by a thermostat located within the space to be heated.

Abstract: A wood burning heating unit having walls defining a combustion chamber, the walls having wall cavities therein for heating a liquid; baffle means within the walls dividing the wall cavities to provide directional liquid flow paths; a heat absorption unit formed of spaced tubes communicating with the wall cavities positioned above the combustion chamber; and inlet outlet water conduit means communicating with the wall cavities.

Abstract: A draft air deflecting device is mountable proximate to a window contained in a firebox and serves as a conduit which directs draft air across the inner surface of the window prior to its supporting combustion of the fuel in the firebox. In this respect, the draft air deflecting device is formed as a box which communicates with draft air holes located in the firebox and which includes a forwardly extending lip serving to define a nozzle for both increasing the velocity and directing the incoming draft air across the firebox window. The incoming draft air is thus utilized to cool and to prevent soot, creosote and other particulates from accumulating on the window.

Abstract: In a wood burning heater of the type having a relatively large glass window in the side of the heater for viewing the fire within the heater box, a door for shielding the glass window from the fire when the door is closed, a vent for controlling the flow of air to cool the glass and means for opening and closing the door, such that the vent must be open permitting air flow to cool the window in order for the door to be opened.

Abstract: A damper control system wherein a control screw is threadedly mounted in a door and engages a depending contact arm on a damper to move the damper between a closed position and various open positions.

Abstract: A stove has a firebox for burning solid fuels such as wood or coal, an opening in a side wall communicating with the firebox, a window housing surrounding the wall opening and protruding laterally from the stove, a transparent window pane mounted in the window housing in alignment with the wall opening and through which the interior of the firebox may be viewed, and a door assembly arranged in the window housing between the window pane and the wall opening. The door assembly includes a door having first and second panels, with hinges connecting the lower edge of the first door panel to the upper edge of the second door panel for pivotal movement about a first horizontal axis. Inclined track members extend downwardly along the interior sides of the window housing and inwardly away from the window pane.

Abstract: A fireplace stove comprising a generally rectangular metallic housing adapted to extend into a fireplace opening, with penetration being limited by a flange around the housing which engages and seals against the face of the fireplace. A metallic inner fire shell is closely spaced within the inner surfaces of the housing to provide airflow passages between them. An air inlet with a blower is located at the lower end of one side of the housing and a narrow, hot air outlet extends across the top. Air is directed to flow almost completely around the fire shell for maximum heating. An air inlet with a blower is located at the lower end of one side of the housing and a narrow, hot air outlet extends across the top. Air is directed to flow almost completely around the fire shell for maximum heating. An access door is held in sealed engagement by a spring latch and a combustion air duct in the door extends into the interior so that the air entering thereto is preheated before actual contact with the fire.

Abstract: A free standing stove having excellent thermal emission and fuel combustion characteristics comprising front, back, base, top and side plates of high strength, heat transmitting metal defining a main body of the stove. The interior of the main body of the stove is provided with a horizontal baffle plate disposed between top and base plates to divide the stove into a lower fuel-receiving and heating compartment and an upper heating compartment. The two compartments communicate by a passageway adjacent a side plate of the stove, and the side plate is provided with an access opening and door to permit insertion of fuel into the lower fuel-receiving compartment. The access door is provided with upper and lower dampers which may be adjusted to circulate air across the stove to retard the movement of combustion gases and by-products through the passageway communicating the upper and lower compartments, and to provide oxygen for combustion of the fuel in the upper and lower compartments, respectively.

Abstract: The specification discloses a fireplace stove in which heat exchange tubes slope upwardly from a sloping rear wall to a sloping front wall of a polygonal body and are open at each end. A door is openable and/or removable from the body to form a fireplace. A door frame has a thermostat controlled damper at its top and outlets to the fire area near in the lower, side portions thereof. A baffle is spaced below the flue outlet and is aligned with the flue outlet.

Abstract: A rectangular stove structure has a stepped top with a sloped intermediate top portion having heated air outlets. Room air is passed through U-shaped ducts arranged along the inside surfaces of the stove side walls, and firebrick is provided on the floor of the stove structure between these ducts. Air is drawn into the ducts through a side opening which may have a blower and conduit associated therewith. The door of the stove has rotary combustion air inlets, and a baffle plate is provided inside the door to provide primary air for the fire, and secondary air for improving air circulation and ventilation inside the stove. Domestic hot water can be heated at the rear of the stove structure in an annular chamber defined for this purpose at the connection for the exhaust gas flue. Domestic hot air can be supplemented by a plenum provided on the lower front top, and the plenum receives heated air from the outlets in the sloped intermediate top portion.

Abstract: A free-standing unit for heating air in a U-shaped channel surrounding a fire box having a pair of spaced vertical vents for directing the heated forced air to converge in front of the fire box opening to limit air flow towards said openings. Mesh in the vertical vents directs the forced air downward to be combined with the hot forced air from a bottom horizontal vent. A baffle plate depending from the top of the fire-box adjacent the flue port and an opening along the top of the doors ignite the gases adjacent the top and directs some gases back into the fire. By forcing heated air at a low level and drawing cool air from a high level, the air being heated is of a uniform temperature. A hood extending along the top edge of the fire box opening diverts exiting gases back into the fire box. A thermostatically controlled blower creates the forced air and cools the fire box walls.

Abstract: The wood burning heating means of the present invention utilizes a firebox having a grate adjacent the lower end and a flue opening adjacent the upper end thereof. A baffle is positioned immediately below the flue opening in such a manner as to deflect rising hot gases prior to their exit through the flue opening. A main draft opening provides communication of air below the grate to provide oxygen for the fire. A secondary draft opening is provided above the grate for introducing air in such a manner that oxygen will be provided immediately below the baffle to facilitate combustion of the gases which have accumulated adjacent the baffle.

Abstract: A wood or coal burning stove having walls defining a fire chamber with a flue disposed in one of the walls. A door provides access to the fire chamber, and a vent for controlling the combustion air is provided in the door. A manifold connected to inlet and outlet pipes passing through the walls provides for circulation of water through the fire chamber to heat the water with a fire burning in the fire chamber. Fuel supporting members extend downwardly from the manifold to support the fuel below the manifold, a number of generally U-shaped pipes with both ends of each pipe in fluid communication with the manifold providing the fuel supporting members. A baffle or like structure is provided in the manifold for preventing short-circuiting between the inlet and outlet pipes, and the manifold is supported in a generally horizontal plane.

Abstract: The furnace for burning wood or coal has a cabinet with a front wall and interconnected spaces between the inner and outer walls at the sides, top, bottom and rear. One of two outer walls have an inlet and outlet for flow of air to be heated. There are aligned flue openings in the upper portion of one of the sets of spaced walls. A grate and an ash pan below are mounted within a lower portion of the cabinet. The front wall has at least one opening closed in an airtight manner by one or two doors. A damper, having a pipe and plate pivotally mounted on the top of the pipe at its front end, is connected to a bimetallic thermostat above it. Both are mounted on the front of the furnace. The thermostat is mounted for movement to open the damper. The front wall of the cabinet or the door, when there is one door, separates the thermostat from the fire chamber within the cabinet above the grate.

Abstract: A store having a parallelepiped-shaped combustion chamber and a parallelepiped-shaped flue chamber smaller in all dimensions than the combustion chamber and with four similar shaped flue outlet frames on the top, rear and sides thereof. The stove includes one flue outlet collar and three blanking plates which can be fitted in any chosen arrangement to the flue outlet frames. The stove has a lift-off hob giving access to the flue chambers even when the flue outlet collar is fitted in the top outlet frame. The fire door occupies the full frontal area of the combustion chamber and the side walls are each formed in two parts of substantially uniform section. The combustion chamber base has sinuous finning.

Abstract: A log-burning stove which contains a full refractory firebox, the stove designed to permit the easy insertion of large, economical, wood logs, particularly green logs, which stove comprises a shell defining a combustion chamber, the combustion chamber fully lined with refractory material, and having an entrance and a full-length loading door adapted to permit the easy introduction of logs into the combustion chamber, the door adapted to move between a closed, upright, sealed position and an open supporting position extending generally laterally from the lower portion of the entrance opening, the door containing roller means on the internal surface thereof which provides for the lateral movement of a large log thereon which permits the positioning of the log adjacent the center of the entrance, whereby, after said positioning of the log adjacent the opening, the log may be moved inwardly through the entrance and into the combustion chamber.

Abstract: A fuel burning heater has a lower combustion chamber with a front door and an upper heating chamber with a discharge port at the rear thereof for products of combustion. A common wall between the combustion chamber and the heating chamber defines a top for the combustion chamber and a bottom for the heating chamber. A first discharge passageway through a forward portion of the common wall conveys products of combustion into the forward portion of the heating chamber. A second discharge passageway through a rear portion of the common wall conveys products of combustion into the rear portion of the heating chamber. A damper is mounted in the second discharge passageway for movement selectively toward an open position for faster burning and toward a closed position for slower burning. Lower and upper draft regulators are mounted in lower and upper portions, respectively, of the door for introducing controlled amounts of combustion air.

Abstract: A stove having an external casing provided with an opening and a cylindrical fire chamber disposed within the casing and provided with a hole arranged adjacent to and in communication with the opening of the casing. Arranged extending transversely across the cylindrical fire chamber is a grate, while a door assembly is disposed removably covering the opening provided in the external casing. Included in the door assembly is a hinged cover provided with a vent for controlling draft in the fire chamber, and with a lock which releasably secures the cover to a cowl of the door assembly on which the cover is hingedly mounted.

Abstract: The present invention involves a high-frequency heating apparatus of the type which comprises a heating chamber for accommodating an object to be heated, a door openably and closably provided for an opening of the heating chamber, a high-frequency energy generator for supplying high-frequency energy to the interior of the heating chamber, a fan for forcibly ventilating the interior of the heating chamber, and a heating chamber air-outlet cooperative with the fan to effect the forcible ventilation for the interior of the heating chamber. Temperature of air flowing out of heating chamber through the heating chamber air-outlet is detected by a temperature sensor to actuate an automatic heating control unit for controlling the supply of high-frequency energy. The apparatus is also provided with a manual heating control unit for manually controlling the heating time.

Abstract: A cooking apparatus employing a purging device.In the apparatus, an exhaust gas which is produced from food being cooked in a cooking chamber is passed through the purging device and is exhausted to the exterior of the chamber at a temperature of 130.degree. C or at a discharge rate of higher than 0.5 m/sec thereby being purged sufficiently.