Abstract: An air tight wood burning stove (10) for heating a designated space comprises a housing (12) having an access opening (50) in the front wall (14) thereof and at least one glass panel (64) containing door (54, 56) hingedly mounted on the front wall for closing the opening (50). A latching mechanism (60) on the door (54, 56) engages with undercut flange means (52, 53) surrounding opening (50) for positively maintaining the door (54, 56) in the closed position. A firebrick lined combustion chamber (34) within the housing receives logs through opening (50) for burning and the production of hot combustion gases. An air chamber (48) is formed within the housing (12) in air flow communication with the combustion chamber (34) for feeding air thereto through openings (94, 96) in the air chamber walls (46, 90).

Abstract: This is a new fireplace, which is either constructed in place or is totally prefabricated in advance and placed within a building where desired. The fireplace is particularly characterized by a pair of overlapping hollow members placed within the throat of the fireplace above the combustion chamber, wherein one of the hollow chambers receives cool air which is heated and then expelled for use, and a second chamber in which an arrangement of tubular members is embedded carrying water into the tubular arrangement for purposes of heating and then bringing the water out of the fireplace. A humidifying liquid is presented into the first chamber and an adjustment for changing the size of the throat is also provided. A method of constructing and assembling the fireplace, or combustion apparatus, in such a manner that it can be prefabricated away from the site of installation.

Abstract: A heating stove including a pair of opposite side walls and front, rear and top and bottom walls interconnecting and extending between front, rear and top and bottom marginal portions of the side walls. A pair of inner side panels are provided and spaced inwardly of the side walls and extend between the top and bottom walls defining interior side wall hollow areas. A rear inner panel is spaced inward of the rear wall and extends between the rear marginal portions of the inner side panels defining an interior rear wall area. A firebox is defined between the side panels and the rear panel and front wall and includes a flue outlet opening outwardly from an upper rear portion of the firebox. Combustion air inlet structure is provided operative to admit combustion air into the lower portion of the interior rear wall area and the upper portion of the interior rear wall area and the rear upper portions of the interior side wall areas are communicated.

Abstract: A wood and coal burning heating unit is provided for heating a residential building or the like. The unit includes a firebox having a double wall on its rear and top sections, with the back chamber and top chamber, which are formed between the respective double walls, being connected in flow communication. Air is blown into the back chamber, flows through the back chamber and top chamber and is expelled through a substantially horizontal, rectangular opening at the front of heating unit. A plurality of elongate, upstanding fins are provided in the top chamber so that the air flowing through the top chamber flows along the upstanding surfaces of the fins. Heat is conducted through the fins from the inner top wall of the firebox and is then transferred from the fins to the air flowing along the surfaces of the fins.

Abstract: A jacketed wood burning stove of the type having an inner firebox door and an outer jacket door in front of the firebox door and wherein a flash inhibitor is provided consisting of a relatively small auxiliary firebox door which is manually biased open but is held closed by an engaging bracket on the outer jacket door when the outer jacket door is closed.

Abstract: A forced air heating unit having a first U-shaped air channel with inlet vents adjacent the front, and a second U-shaped forced air channel interior said first forced air channel communicating with the first forced air channel via an opening in the common rear wall and having exit vents adjacent the front. A fan is mounted to the rear wall having the motor exterior the forced air channels with an impeller in the common rear wall opening. A conical deflector extends from the interior wall of the second forced air channel towards said rear wall opening. A refractory floor in the firebox includes front, side and rear vertical portions with top surfaces inclined towards the respective wall. The rear and side vertical portions exceed the height of a grate or andirons positioned on the refractory floor.

Abstract: A woodburning stove having an inner housing and an outer housing spaced therefrom providing air passages therebetween. A blower circulates air through the air passages for absorbing heat from the walls of the housing and exhausting the heated air into the room where the stove is located. A substantially horizontal plate is spaced below the top wall of the inner housing defining an afterburner space. A duct extends between the passages extending between the two housings and the afterburner space. The duct is provided with a valve so that fresh air can be controllably applied to the afterburner space for causing combustion of gasses flowing through the afterburner space. A fresh air duct extends along the side of the stove and connects with the blower for supplying fresh air from the front of the stove to the blower.

Abstract: An efficient zero clearance fireplace, space heater is disclosed which is adaptable for installation in either mobile homes or permanent structures. The fireplace unit consists of a stainless steel firebox with an opening for access to the interior thereof. The firebox is surrounded by a first metal skin spaced therefrom which mounts glass doors across the opening. The outer surface of the top, bottom, sides, and back of the first skin are sheathed with an insulating felt. A second metal skin surrounds the first on the sides, back, and top. Outside air is circulated between the firebox and first skin, and heated thereby as the sole source of combustion air. This heated air is also circulated into the room through vents in the front of the first skin. Cool room air from the floor circulates upwardly between the first and second skins only to cool the unit. An optional damper and combustion air control is provided.

Abstract: A stove comprises a firebox formed of two U-shaped interfitting members of steel plate and a U-shapted one piece base. Dual primary and secondary draft air channels extend along the bottom of the firebox from front to back immediately underneath the fire and upwardly at the rear of the firebox. A first or larger channel provides primary combustion air to the fire and the second channel extends farther upwardly to the region where volatile gases would enter the flue to secure more complete combustion thereof. The dual draft channels are controlled by an automatic draft device at the front of the stove through which the draft air is introduced. A heat shield at the rear of the stove cooperates with the one piece base for delivering heated air forwardly to the living area in front of the stove.

Abstract: A stove having an integral heat exchanger and a fan unit for forcing air through the heat exchanger and into a room where the stove is situated through hot air outlet openings in the stove front which are covered by perforated ceramic decorative cover plates. The heat exchanger extends along the rear and side walls of the stove and comprises a conduit of welded sheet metal construction similar to that of the stove walls wherein portions of the stove side walls also serve as the sides of the heat exchanger conduit. The decorative cover plates are retained in position by elastically deformable wire clips which partially encircle an edge of each cover plate and frictionally engage an outwardly projecting lip surrounding the hot air outlet openings of the heat exchanger conduit.

Abstract: An improved wood burning stove for providing heated air to a room or similar area includes an enclosed fire chamber, a hearth at the bottom of the fire chamber, draft inlet means at the front of the fire chamber and a flue at the rear of the fire chamber. Within the fire chamber is an enclosed air chamber having lower and upper portions; the lower portion communicates at the bottom of the stove with the ambient air and extends upwardly adjacent the rear wall of the fire chamber to a point below the flue, where it joins with the upper portion. The upper portion of the air chamber extends upwardly toward the front of the fire chamber at an acute angle with the horizontal, preferably between five and twenty-five degrees; at the forward end of the upper portion the air chamber communicates with one or more air pipes which extend to the front of the stove and there open to the ambient air.

Abstract: A fireplace and room heater that makes use of both natural air convection and forced air principles to efficiently heat an adjacent room. The fireplace and heater is freestanding and includes a firebox that is enclosed on three sides by a shell. The shell forms an air space between its walls and the firebox that is used for passage of air. A bulkhead separates the space into two distinct plenum chambers, an upper chamber and a lower chamber. A blower is provided at the rear of the unit. An intake of the blower opens into the lower plenum chamber. A discharge of the blower opens into the upper plenum chamber. Air is drawn through the lower plenum chamber by the blower and is forced outwardly through the upper plenum chamber through the blower discharge. The blower is controlled by a rheostat and thermostat to facilitate selective adjustment of air flow through the unit.

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 heated air circulator adapted to be placed against a radiant-type heating stove. The housing of the circulator, which defines a chamber therewithin, includes upright back and side walls which are unjoined along their adjacent upper edge portions. A plurality of spaced-apart, transverse fold lines on the back and side walls, where the same are unjoined, permit portions of these walls to be folded over to form a chamber top at a height conforming to the height of the stove. The circulator includes a damper regulated by a temperature-responsive spring whereby flow of unheated air into the chamber increases as the temperature within the chamber increases.

Abstract: An apparatus for extracting heat from the waste gases of a stove to heat the air in the room. The apparatus is mounted on the stove and includes a central chamber in which an inner core, having a plurality of passageways, is positioned. Waste gases from the stove enter the central chamber, pass through the passageways of the inner core so as to heat the air surrounding the inner core, and then exit from the central chamber. A removably mounted closure is mounted on the top end of the central chamber to enable cleaning of the insides of the passageways. A heat shield which extends below the bottom end of the central chamber so as to surround the back and sides of the stove is provided to protect adjacent walls from the heat radiated by the stove.

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: Fire preventing shielding and air circulation apparatus for use with a box-type stove includes means for forming a chamber bounded at its top by the bottom of the firebox of the stove using a flat panel and upwardly extending apertured sides. A preferred embodiment also includes a stack formed on and bounded by the rear side of the stove and connected to communicate with the chamber.

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: Fireplace furnace apparatus includes separate air systems for combustion and for heating and the combustion gases flow from a primary combustion chamber into a secondary combustion chamber and into additional settling chambers for particulate matter and the heated air flows through finned chambers adjacent the chambers through which the combustion air flows.

Abstract: A furnace is provided which is capable of heating a circulating current of air by heat produced from the combustion of either solid or fluid fuel. The furnace is constructed with two separate combustion compartments and an intervening chamber for circulation of the air to be heated. By means of temperature sensor and control means, the fluid fuel supply is stopped when adequate heat is being produced from the solid fuel. The furnace is adapted to heat remotely located rooms by means of conduits which transport said heated air. The room in which the furnace is located is heated by radiation and convectively heated contiguous air.

Abstract: A fire box is provided having upstanding peripheral walls and bottom and top walls. The fire box includes draft air inlet structure opening through the bottom wall thereof and flue gas outlet structure opening upwardly through the top wall thereof. The lower portion of the fire box includes horizontally outwardly projecting seat structure extending peripherally about at least all but one peripheral wall portion of the fire box and a downwardly opening hollow plenum box including upstanding peripheral walls and a top wall is also provided with the plenum box being removably downwardly telescoped over the fire box and with the lower portions of the peripheral walls of the fire box seated against and in at least reasonably good air sealed engagement with the seat structure and with the corresponding peripheral walls and top walls of the fire box and plenum box disposed in spaced relation defining a heating chamber therebetween.

Abstract: A freestanding fireplace and room heater is described that is both pleasing in appearance and is an efficient room heater. The heater includes an upright firebox selectively sealed by a door on a front wall thereof. The door may be opened and swung to a position adjacent one side of the firebox for free access to the firebox interior. The door includes a removable glass window for a clear view of a fire within the firebox. The window may be selectively removed and replaced with a metal panel. A relatively inconspicuous blower unit is mounted at the rearward side of the firebox to receive and direct air across the back side, then out across the top, bottom, and sides of the firebox. Also included is a draft arrangement adjacent to the glass pane. The draft arrangement operates to draw cool air in and downwardly across the inside surface of the glass pane. The draft arrangement provides air to support combustion within the firebox and prevents build-up of soot and dust on the glass pane.

Abstract: A forced air room heater for installation in a Franklin stove includes a mounting plate configured for covering the flue opening located in the back wall of the stove and having a central opening passing therethrough. A plenum chamber arranged for placement above the baffle which divides the firebox of the stove has an inlet interconnecting it to the opening in the mounting plate and an outlet opening outside of the stove. An electric motor powered fan is attached to the mounting plate opposite the inlet for forcing air first into the plenum where it is heated, then out of the outlet. In one embodiment the outlet opens out of the stove through its front door opening. In a second embodiment the outlet exits the stove through the mounting plate allowing operation of the stove with its door closed.

Abstract: A unitary firebox enclosed by a cabinet through which air is circulated for heating purposes. A blower forces air into the interior of the firebox through louvers located on the opposite side walls at a level adjacent the fire. Secondary air is drawn into a secondary combustion chamber to assist in complete combustion of the gases. A hinged door for the firedoor is held closed by a toggle latching arrangement, and the door is adjustable in order to assure a tight seal even if warpage should occur. A bypass damper may be opened to assure that smoke and ash are drawn into the flue instead of drifting out through the firebox door during the loading of fuel.

Abstract: A solid fuel burning heater has an inner combustion chamber housing enclosed within an outer housing with a fuel feed door in the inner combustion chamber housing being aligned with an outer housing door; an air inlet in the bottom of the combustion chamber housing has a thermostatically controlled air inflow closure valving member connected to a wire bail having an upper end encircling a cam rod connected to the outer housing door. Opening movement of the outer housing door moves the cam rod so that the air inflow closure valving member is opened to provide combustion air into the combustion chamber and prevent blowback upon the subsequent opening of the fuel feed door.

Abstract: A forced air assembly for attachment to an otherwise unjacketed space heater consisting of a fan or blower centrally mounted in a relatively thin (height compared with width) channel, the channel being adapted to wrap around varying contours of stoves by virtue of a series of cut-out regions in side walls of the channel. Air is forced through the channel, heated, and flows out of the ends of the channel.