Abstract: The damper is a hollow sheet metal duct-like device of generally rectangular cross section, and is adapted to fit over the combustion air intake of a furnace blower so that the furnace must obtain its combustion air through said damper. A trap door type valve in the lower surface of device automatically opens in response to the suction of the blower to admit combustion air, and automatically closes due to gravity when said blower is de-energized, to cut off the air supply to the furnace combustion chamber when the furnace is not operating.

Abstract: A draft control arrangement for a heating apparatus. The draft control arrangement includes a vent damper comprised of one element formed of a shape memory material and another element form of a thermostat material with the elements arranged for coacting to provide a rapid rate of flow passage opening during an initial phase of temperature rise followed by a rate of flow area opening substantially proportional to further temperature rise.

Abstract: Disclosed herein is an improved wood burning stove employing a combustion chamber and a flue for removing exhaust therefrom and also a catalytic converter means for oxidizing oxidizable species in the exhaust. A passageway is provided for bypassing the exhaust around the catalytic converter means, the passageway being controlled by a bypass damper for controlling access to the passageway for varying impedance otherwise presented to the exhaust by the converter, for example, during the addition of fuel to the stove. Such an arrangement minimizes back pressure caused by the converter means.

Abstract: There is disclosed a damper for controlling the flow of high temperature gases to respective hearth chambers of a multiple hearth furnace, for example, the damper being formed of temperature resistant ceramic plate having an air cooled shaft extending diametrically therethrough and insulated from the plate by a heat resistant ceramic fiber material.

Abstract: The fireplace furnace is constructed with two flues which merge into a single chimney. An upper flue is directly above the fire as is in ordinary fireplace and includes a first damper which can be moved between open and closed positions. A lower flue is near the bottom of the fireplace and contains a secondary damper. Glass or metal doors enclose the front of the fireplace furnace and the fire is built with the upper damper fully open. The glass doors are closed, the upper damper is closed and the lower damper is open. The fireplace then operates as a furnace and can be connected to duct work existing throughout the house. The use of the lower flue increases the radiation of heat and conserves fuel by forcing the heated products of combustion to remain within the burning chamber of the fireplace furnace for a greater length of time. One outside air intake is connected to each side of the fireplace furnace firebox.

Abstract: Fireplace attachments and efficient fireplaces which prevent smoke from escaping from the fireplace into the room. An adjustable controller means is provided which controls the size of an opening to the flue. Also disclosed is a heat deflector means which increases the efficiency of a convection-type heat extractor.

Abstract: The present forced-air heat exchange system has a solar collector through which air is circulated by a blower to the air inlet of a heat exchanger. The heat exchanger has an air outlet connected to a recirculation duct leading to the air inlet of the blower. A recirculation damper in this duct is open when the temperature of the recirculated air in the system is higher than that of the ambient air outside the system, and it closes when the ambient air temperature is higher. Pressure sensitive draft regulators at the inlet and outlet sides of the recirculation damper remain closed when the damper is open and they open automatically when the damper closes, thereby admitting ambient air into the recirculation duct at the outlet side of the damper and venting the recirculation duct at the inlet side of the damper.

Abstract: This invention is concerned with a removable filter to prevent the buildup of Creosote in chimneys which become vulnerable to fires.A hollow enclosure means that is adapted to connect between the chimney and the fire source has within it a support for mounting a filter. The filter is made of a special metal, is knitted with small openings therein permitting the flow of smoke but at the same time to reduce the particles into a minute white ash. The filter acts as a continuous burn reactor. A door is provided whereby the filter can be easily removed from the hollow enclosure and cleaned so that it can be used for an indefinite period without replacement.

Abstract: A stack damper valve comprising a pair of semicircular steel discs typically joined by a removable piano-type hinge. Each of the discs pivot upwardly in the direction of flow from a closed to an open position and vice versa. In the closed position the discs seat in a metal-to-metal relationship against a circular truncated steel seat which is secured such as by welding to the inner surface of the steel stack in which the valve is mounted.

Abstract: A vent control arrangement for energy conservation having bimetallic damper elements mounted in a draft hood which forms an integral part of the heating apparatus. The bimetallic elements open and close the flow passage for vent gases from the combustion apparatus in response to temperature change. The vent control arrangement is designed for minimum resistance to the flow of vent gases when installed in the integral draft hood. A design without friction surfaces and without transfer of movements or signals between components is used. Opening time is minimized by closeness to the heat source and in one embodiment by alternate bimetal reeds of different initial tension, in other embodiments by alternate orientation, or by different flexivity of alternate bimetal reeds.

Abstract: A damper construction, comprises, a central hollow tubular pipe pivot portion having an axially extending interior pipe coolant flow passage therethrough and a substantially cylindrical flat plate portion connected to the pipe pivot portion. The pipe pivot portion is mounted for rotation in a bearing formed at diametrically opposite sides of a tubular conduit made up of walls formed by longitudinal pipes arranged side-by-side in a circular pattern and welded together. The bearing includes a hollow portion and it is furnished with coolant which is circulated through the pipes of the conduit.

Abstract: A stove bench comprised of a metal liner forming an interior duct which is covered with tiles or masonry to form the outer face of the stove bench, an inlet to the duct for receiving hot exhaust gases from a stove or furnace, and an outlet from the duct for the exhaust of the gases to a chimney or the like. The bench has a top that is also covered with tiles, masonry, or soapstone, permitting heat conduction thereto, and permitting the top to serve as a seating or sleeping surface. The stove bench is preferably supported on two legs and has a clean-out door, preferably disposed at one end of the stove bench. A damper is disposed at the outlet from the structure for controlling the gases passed through the stove bench.In an alternate embodiment of the stove bench there is further included an insulated bypass duct disposed beneath the first, heat-conducting duct.

Abstract: The field of this invention is fluid flow control through large conduits. In particular, this invention is contemplated for use in a combined cycle power plant wherein gas turbine exhaust gas is either sent through a heat recovery steam generator (HRSG) or diverted to the atmosphere. The invention is a damper and frame assembly believed to be well suited to the purpose of channeling the hot exhaust gas within the context of a combined cycle power plant either as an isolation damper to the HRSG or a bypass damper to the exhaust stack. One key consideration is the thermal relationship between the damper blade and its adjacent frame and provision is made to provide a damper blade that will not warp and a frame wherein thermal growth and distortion are limited.

Abstract: This invention is directed to a heat circulating fireplace arranged and constructed to control the temperature in which air is delivered to an insert module and to control the temperature of the heated air discharged into the fireplace room and/or adjacent rooms. The fireplace includes an air control assembly operably coupled to an insert module which is adapted to be mounted into an existing fireplace or may be part of the original fireplace assembly. The air control assembly including damper means is associated with the fan means and is capable of proportioning outside air and/or room air into the insert module so as to maintain a predetermined temperature of heated air being discharged. The damper means is operable to control or proportion room air and/or outside air to maintain a desired temperature gradient between air to be heated and discharged air to the fireplace room and/or adjacent rooms. Air inlet ducts and heated air outlet ducts are coupled in fluid communication to the insert module.

Abstract: A device intended for flue gas passages includes a pivotable damper plate which is connected to a regulating device for automatic adjustment of the damper plate between a closed position and an open position in response to the operating condition of an installation connected to a flue gas passage. Adjustment is effected with regard to the economical operating position to prevailing outside wind conditions. An anemometric chamber with an associated diaphragm is arranged to be actuated by the gas pressure in the flue gas passage downstream of the damper plate and is connected to the damper plate in such a way that the degree of opening of the damper plate in the economical operation position is decreased for decreasing gas pressure in the flue gas passage.

Abstract: A combined chimney cover and damper comprising an elongated sleeve having a closed end defining the cover and an open end supported within the chimney, support means extending laterally from the sleeve and engageable with the top of the chimney to support and maintain the cover and damper in operative relation to the chimney, at least one aperture in the sleeve between the support means and the closed end of the sleeve, a damper normally resiliently urged upwardly within the sleeve against its closed end to cover the aperture, and means for moving the damper across the aperture to establish communication between the interior of the chimney and the atmosphere. The cover preferably includes a flange spaced horizontally outwardly from and at least partially overlapping the aperture to protect it against wind blown rain and snow.

Abstract: A method and device for applying heat-activatable adhesive tape to boxes and the like, using sealing tape with adhesive that can be activated through radiant heat or hot air prior to its application to the box surface, where, in contact with a cold surface, the adhesive is instantaneously cured. The device includes a suction-type conveying device for the adhesive tape, either a belt conveyor cooperating with an infra-red heater, or a suction drum with a hot air supply.

Abstract: Exhaust system control apparatus operative to automatically close a damper in an exhaust duct leading from a spray booth when the spray booth is not in operation. A reversible damper motor is energized to rotate the damper to an open position when the spray booth is in operation. The damper motor is automatically reversed to close the damper in response to termination of spray booth operation. Energy is thus conserved by reducing the amount of heated air that would otherwise escape through the exhaust duct when the spray booth is not being used.In case of fire, the same damper is automatically rotated to a closed position in the exhaust duct by a spring loaded sprocket assembly on the damper shaft. This safety action takes place in response to the melting of a fusible link located in the exhaust duct and connected to a sprocket retention cable.

Abstract: A damper assembly constructed to close a flue pipe for a burner during non-use of the burner and to automatically open prior to burner ignition. An actuator operated by a thermo-statically controlled heater and an expansible fluid, rotates a baffle of the damper assembly to open the flue pipe. A safety interlock requires the baffle to be opened before the burner is ignited. When the burner is turned off, the actuator delays closing of the baffle for a time to allow exhausting of residual combustion products. In one embodiment, two baffles are operated to close a flue pipe above and below a draft diverter.

Abstract: An improvement in heat exchangers for hot air furnaces and water heaters. The improvement is a rotating damper having an opening above each flue that momentarily closes off the outlet of each flue in turn. This holding of hot gases provides more time for the transfer of heat before the gases are discharged to a chimney. The damper openings are sized and arranged so that at least one of the flues is open and one or more closed at any particular moment during the cycle. When a particular flue is opened by the rotating damper the held gases which have now cooled are discharged to the chimney and replaced by a new supply of hot gases. When this flue is closed by further rotation of the damper, it becomes a holding chamber for the hot gases. The other flues operate in turn in the same manner.

Abstract: A butterfly damper with a plurality of blades which can be locked in the open position, and which, when released, rotate about a hinge to the closed position. A pawl member, attached to one blade, extends away from the blade and through an opening in a second blade when the blades are in the open position. A mounting member attached to the second blade restrains the pawl member thereby holding the blades in the open position. A bimetallic link attached to the mounting member causes the pawl member to be released when the temperature of the air passing through the duct increases beyond a preselected level. A closure spring attached to the blades acts on the blades tending to force them apart against the action of the mounting member and the pawl member when the blades are restrained in the open position. The damper blades can be insulated to prevent the heat from a fire on one side of the damper from being conducted by the damper to the other side when the blades are in the closed position.

Abstract: A damper assembly for conserving fuel consumption in a heating furnace comprises baffle means pivotally mounted in support means arranged to fit in an outlet flue communicating between the furnace and a chimney stack so that the baffle means is movable between a fully open position whereby the flow of combustion gases from the furnace to the stack is substantially unimpeded and a fully closed position providing a restricted flow path for the gases whereby the gas flow to the stack is reduced. Associated wth the baffle means is thermostatic control means responsive to the temperature of the combustion gases for moving the baffle means to the fully open position at a relatively low temperature indicating that the furnace is inoperative and for moving the baffle means to the fully closed position at a relatively high temperature indicating that the furnace is operative.

Abstract: A ventilated poppet damper assembly for use in a gas conveying conduit to selectively allow and prevent the flow of gas through the conduit has a movable pair of spaced apart damper plates which define a transverse chamber when in the closed position. The transverse chamber is vented to insure that there is no leakage of conveyed gas past the closed damper plates.

Abstract: An apparatus for opening and closing the draft hood discharge opening and vent and fuel line of a fluid fuel-fired heating device such as a domestic water heater. The disclosed apparatus includes a diaphragm-type expansible chamber fluid motor assembly positioned in the burner fuel supply line. The motor assembly is mechanically linked to a damper assembly such that the supply of pressurized fuel acts to actuate the motor for opening the damper assembly prior to the motor assembly admitting fuel to the burner. Additionally, when the supply of fuel is terminated, the motor assembly does not close the damper assembly until after the motor assembly stops fuel to the burner.

Abstract: A kitchen ventilating system typically has an exhaust duct and power fan means therein which communicates through passage means with an inlet located in the kitchen. This disclosure teaches particular means for mounting a damper so that it can be pivoted to open and close the passage means, and further can be easily installed and removed from the passage means. The damper pivot means include stub shafts that project beyond the end edges of the damper and thin plate bearing means that receive and journal the respective stub shafts, where the bearing means can be releasably secured relative to the passage means wall structure.

Abstract: A damper assembly for high temperature or corrosive gases including a flow through housing with a damper blade disposed therein, the damper blade including a metallic plate member attached to a transversely extending support member which extends through openings in the side walls of the housing. The plate member includes means for receiving refractory thereon wherein the refractory substantially covers the plate member and is divided into a plurality of preselected sections, each section being separated by a material having a relatively low disintegrating temperature whereby upon initial heating of the damper assembly to temperatures higher than the disintegrating temperature of the relatively low disintegrating material, the said material disintegrates thereby leaving spacing in the refractory for expansion and contraction over a wide range of temperatures.

Abstract: Automatic damper having pivotal semi-circular vanes which are moved to open position by pivotal movement of a longitudinal element disposed along the central gap between the vanes. The movement of the longitudinal element is controlled by a temperature responsive element. Retraction of the longitudinal element causes closing of the vanes. A J-slot arrangement locks the vanes in open position.

Abstract: In a building heating system having a furnace, the instant invention incorporates a furnace enclosure for spacedly enclosing the furnace, an inlet air duct for conducting fresh air to the enclosure space for supporting combustion in the furnace, a combustion products outlet duct extending from the furnace, radiant heating duct means extending from the combustion products duct in radiant heat exchange relation with building space, and flue means communicating with the radiant heating duct for exhausting flue gas.