Abstract: A heater comprises a combustion tube connected to receive gaseous fuel or liquid fuel dispersed within a gaseous carrier gas from a source. The combustion tube communicates with an expansion chamber whose surface is provided with a plurality of openings. The expansion chamber is housed within a perforated container, the internal surface of which is spaced from the external surface of the expansion chamber to receive heating blocks.

Abstract: A novel control system for altering a fixed pattern of gas flames in a fireplace having artificial logs comprises a log set having a burner system and the burner system having a gas valve control which is coupled to source of gas or air to be regulated. The control system has a valve which controls the air or gas being supplied to the burner and a control sensor is coupled to the control system for activating the time sequence of the cycle of the control system so as to raise or lower the gas flames being regulated and to disturb the pattern of gas flames to produce the effect of dancing flames.

Abstract: A propane burner system for orchards includes a housing, a venturi system, and a propane fuel system. The housing preferably includes a bottom enclosure interconnected with a stack and may be a converted standard fuel burning orchard heater. The venturi system is positioned within the bottom enclosure so that it extends into the stack. The bottom enclosure has at least one vent/fuel opening and the stack preferably includes an igniter opening. The venturi system includes a support system, a flue that is preferably triangular in crosssection, an exhausting chamber, and a deflector plate.

Abstract: A burn rate control valve for gas fired heaters in the form of a 1/4 turn ball valve having two flow passages through the valve member in which one flow passage is for full gas flow and the other flow passage is smaller in diameter for low gas flow in order to provide a full burn rate or a low burn rate. The two passages are dimensioned and angularly related such that the larger or full burn rate passage essentially provides unrestricted flow when aligned with related ports or piping with the smaller or low burn rate passage being angularly related to the larger passage at an angle less than 90.degree. in order to maintain a flow passageway when the ball valve member is moved to a position with the larger passage perpendicular to the associated ports. This angular relation assures that the smaller flow passage will be opened before the larger flow passage closes too much in order that the burner will not cease to operate and not provide a lower burn rate than intended.

Abstract: Presented is a wall heater or furnace extension structure for mounting in the space between a conventional wall furnace or heater and the ceiling of the room in which the wall furnace or heater are installed. The wall material normally found in this area of the wall is removed to expose the flue connected to the fire-box of the furnace or heater. The furnace extension structure is mounted on the wall so as to enclose the flue, draw air from the room into the space surrounding the flue, and then discharge the heated air back into the room from which it emanated.

Abstract: A gas and solid fuel burning chamber is provided with a control system for the safe and efficient operation of a gas burner. The simple control system uses multiple thermocouples in series to permit the safe operation of the gas burner in a vented device without the need for a draft hood. A combination of gas and solid fuel is demonstrated where gas can be used to start the solid or as an independent source of heat. The control system comprises generally of thermocouples for measuring the flame temperature, the combusted gas temperature and the overall chamber internal temperature and producing signals to regulate the flow of fuel to the gas burner in response thereto.

Abstract: A burner unit for heating a gaseous medium includes a heat exchanger provided with tubes, a space between the tubes connected on the upstream side to a feed duct for the gaseous medium; a combustion chamber connected to the downstream side of the space between the tubes; a burner placed in the combustion chamber; and a fuel supply duct connected to the burner. The side of the combustion chamber remote from the heat exchanger is connected to a first end of the tubes; and a flue gas outlet duct is connected to the other end of the tubes. The elongation of the tubes forming part of the heat exchanger renders the use of a conventional tube plate superfluous. Thus, damage resulting from thermal stresses is avoided.

Abstract: A fireplace structure has a water fountain in at least the front part of a fire box having a gas burner therein. The structure may be either placed in a fireplace or free standing apart from any fireplace.

Abstract: A flueless, portable low nitrogen oxides emissions, low carbon monoxide emissions space heater having a fuel chamber with a fuel inlet and a fuel distributor. The fuel inlet generates a swirling fuel flow within the fuel chamber. A primary air inlet generates a counter-swirling primary airflow with respect to the swirling fuel flow in a primary air chamber. The fuel distributor discharges the swirling fuel flow into the counter-swirling primary airflow thus forming a fuel/air mixture. An ignitor ignites the fuel/air mixture. A combustion chamber is sealably secured to and in communication with the primary air chamber. The combustion chamber wall has a plurality of secondary air supply holes. An intermediate shell surrounds the combustion chamber wall and forms a space between the intermediate shell and the combustion chamber wall. A secondary air inlet is in communication with the space between the intermediate shell and the combustion chamber wall. An outer protective shell surrounds the intermediate shell.

Abstract: An outdoor heating appliance includes a top structure having a top surface, a stationary airfoil, and exhaust openings for flue products. The operation of the heating appliance is rendered wind resistant by generating with the stationary airfoil, in a region above the top surface and in repsonse to wind, an air pressure lower than an air pressure of that wind, and by locating the exhaust openings in that region, whereby the flue products are exhausted from the outdoor heating appliance by the wind. An inlet opening may be provided below the top surface at the airfoil for receiving part of the wind, in order to sustain combustion and generate inside the heating appliance positive pressure toward the exhaust openings by guiding air from the received part of the wind through a channel to a burner in the heating appliance.

Abstract: The invention provides a compartmented gas fired heater in a cabinet-type outer stove casing. The outer stove casing has a downwardly positioned covered bottom with adjustable legs at four corners and an upwardly positioned opened top edge. A heat chamber insert having a covered bottom and an opened top is fitted inside the outer stove casing and retained so a corridor exists between all wall surfaces and the two bottoms. The top of the two sections are covered over the corridor area by a framing cover leaving the top of the heat chamber insert open as a hot air outlet. A caged outlet cover fits over the hot air outlet. Cool air is passed into the heat chamber insert through an air inlet casing. When a controlled gas burner is fired in the corridor below the bottom of the heat insert chamber, heat spirals up the corridors, is conducted through the outer stove casing and through the heat chamber insert walls and convected up through the top hot air outlet.

Abstract: A space heater which is generally rectangular in shape and which has a chamber inside which is generally square in cross section. This square shaped chamber has inlets along the bottom thereof and outlets along the top thereof. An improved burner assembly is disposed centrally on the bottom wall of the chamber housing and includes a vertically extending conduit having an opening in the top thereof. A first square plate is attached to the top of the vertically extending conduit and the first square plate is disposed generally horizontally and has a round opening in the center thereof for allowing a fuel and air mixture to exit therethrough. The first square plate has upwardly extending flanges on each edge thereof for directing flames upwardly and causing the flame to be of the same cross sectional shape as the chamber. A second square plate, smaller than the first square plate, is disposed just above the first square plate and is also horizontally disposed.

Abstract: A low intensity infrared radiant heating system comprising an exhaust effluent temperature sensor for disabling burner operations to keep thermal operating efficiences within preselected limits. A minimum burner run timer is used to avoid corrosive condensate accumulation in the primary emitter length. Multiple burner systems utilizing a microprocessor control system is disclosed.

Abstract: A discharge pipe is directly associated with one of the main heat exchange walls of a monoblock heating body, and a backflow damping device comprises two siphons placed symmetrically on either side of the pipe, each having a passage above the level of the horizontal axis of the pipe, which axis is situated in the median transverse plane of the heating body, and each of the siphons is situated substantially in line with an opening formed in the corresponding lateral side near the corresponding one of the two ends of the burner.

Abstract: A space heater for small compartments in which the burner is received in an upwardly open tray bottom which has an outwardly extending flange connected to an outwardly extending flange at the lower end of the combustion chamber. The tray has a lateral opening for the combustion air thereby eliminating the need to go through the floor with a pipe forming a combustion air intake.

Abstract: A furnace for wood log fuel having apparatus which automatically inserts the logs into the furnace combustion chamber. The log fuel is retained in a sloping ramp storage compartment. Electrical circuitry controlled by a thermostat operates to move a log into an elongated chamber from which a motor driven injector pushes the log into the combustion chamber through a doorway covered by a flexible, segmented flap covering and also a door which is pushed open by the advancing log. The presence of the log on a spring mounted grate operates certain switches to return the injection mechanism to its ready condition and also to operate a fan which provides combustion air to the combustion chamber. The reduced weight on the grate by the consumption of the log by the fire permits the grate to move to a position to re-initiate the log injection cycle.

Abstract: A cooking utensil comprising a pan with a flat bottom and vertical side means formed integrally with said bottom, and an array of evenly spaced substantially uniform holes formed in a portion of said bottom to provide a food extrusion area, the remaining portion of said bottom providing a food holding area.

Abstract: This invention relates to a liquid fuel combustion apparatus such as oil space heater in which liquid fuel is vaporized by a vaporizer and the vaporized liquid fuel is injected through a first nozzle to a burner. The vaporizer is heated by combustion of fuel gas which is injected through a second nozzle to the burner before the vaporizer has been heated up to a temperature at which the liquid fuel passing the vaporizer is evaporated. The injection of the fuel gas from the second nozzle to the burner is changed to the injection of the vaporized liquid fuel from the first nozzle when the vaporizer has been heated up to a desired temperature. The supply of the liquid fuel to the vaporizer is carried out by a fuel pump which is driven by electric power generated by a thermopile.

Abstract: A portable heater, and component parts thereof, is provided that is capable of safely generating large amounts of heat over a relatively long time frame without significant amounts of pollution. A source of combustible gas, such as a canister of liquefied butane, is in operative communication with a combustion chamber through a control valve. The combustion chamber comprises an elongated tubular member concentric with a chimney. Air and combustible gas are drawn into the bottom of the tubular combustion chamber and combust without flame on a plurality of metal heat-resistant screens. A simple relative rotation between top and bottom casing components controls the flow of gas. A removable piezoelectric igniter is mounted on top of the heater to effect ignition.

Abstract: A radiant heater is provided with a fuel-fired radiant housed in a combustion chamber having a wall with a radiation-transmissive panel. A plenum adjacent the combustion chamber is provided with air under pressure greater than that in the combustion chamber. Air from the plenum is employed as primary combustion air for the fuel-fired radiant, and air from the plenum also is caused to flow cocurrently into the combustion chamber and to provide adjacent the inner surface of the radiation-transmissive panel a constantly replenished pool or cushion of cool air cooling the panel and providing a buffer layer to prevent impingement of hot combustion product gases thereon. The orientation of the heater within a space to be heated may be varied within limits without adversely affecting its operation, and the heater may be made of small size.