Abstract: An air purification system chills incoming air to condense water and toxic gases, adsorbs toxic molecules, reheats the air to reduce its relative humidity, and then converts oxidizable contaminants into carbon dioxide with an oxidation catalyst.

Abstract: A chemical oxygen generator is disclosed which includes a pressure vessel surrounding the container containing the chemical. In a space between the tank containing the chemical and the wall of the pressure vessel, a supply of pressurized oxygen is provided. A manually triggerable valve stem is operable to simultaneously open a passage from the pressurized supply and to initiate ignition of the chemical in the tank to generate a further supply of oxygen.

Abstract: A sulfur compound and a nitrogen compound as ill-smelling components can efficiently be removed from a gas containing the same by bringing the gas into contact with an adsorbent comprising activated carbon having supported thereon bromine and a non-volatile acid.

Abstract: A process for treating exhaust gas from an electrophotographic machine which comprises oxidizing, in the presence of a heated oxidation catalyst, an odorous exhaust gas generated in course of the steps of developing an element being developed by means of a developer, transferring the thus developed image onto a transfer sheet and/or heating a copy material consisting of said element being developed or said transfer sheet thereby to make said exhaust gas odorless, and an apparatus therefor.

Abstract: A method for protecting environment from volatile liquid chloride as exposed to the atmosphere, which comprises:spreading foamy particulates of styrene resin over the chloride,initiating a reaction between the resin and chloride at the interface to form a filmy product, andcovering the surface of the chloride to a substantial part with a layer comprising such product, thus blocking evaporation of the chloride to spread and contact with humidity in the atmosphere.

Abstract: An imperforate duct has fluid-inlet and fluid-outlet openings at opposite ends thereof, between which is located a rotor that performs both a ventilating function and a filtering function by way of imperforate, rough surfaces which are adapted to retain solid and liquid particles contained in air or other gas that is being filtered, the rotor being followed by a gas-treating filter through which the fluid passes before emerging from the hood. An aerodynamic block against backflow is located between the inlet opening and the rotor, but not in contact with the rotor.

Abstract: A novel apparatus for the collection and removal of ozone generated during the operation of machines, such as an electrostatographic copying machine, is disclosed which includes the substantially complete collection of ozone generated by the use of an apertured plenum at the point of ozone generation, and the substantially complete removal of the ozone collected by the use of a fixed bed filtering device which has a large bed area to volume ratio. The disclosed apparatus permits the substantially complete collection of all ozone generated in a relatively small volume of air accomplished with a low pressure drop, so that the ozone collection and removal system would not interfere with the normal operation of the electrostatographic copying machine.

Abstract: Positional sensitivity of a Kipp type generator with respect to a gravitanal field is achieved by utilization of one or more selectively oriented gravitational sensitive valves in the chamber containing the liquid capable of providing the desired gaseous output. The gravitational sensitive valves may be used individually or in combination. Each valve permits operation when it has an orientation corresponding to a predetermined orientational range. A chamber whose geometrical shape is a parallelepiped employs an arrangement of four gravitational sensitive valves to provide gas generator operation independent of its orientation in a gravitational field.

Abstract: A dry deodorizing apparatus. More particularly, it relates to a dry deodorizing apparatus wherein bad smell components in the gas to be treated is oxidized and removed by ozone and bromine and hydrobromine acid and, in addition, the ozonizing material such as ozone and bromine entrained by the air to be treated is removed with an adsorbent or a decomposing agent so that no secondary environmental pollution due to ozonizing material takes place.

Abstract: A carbon dioxide scrubber device for use in a closed or semi-closed breatg gas circuit in an underwater breathing apparatus having a low rate of gas flow includes a canister having a plurality of spaced, coaxial walls that are heated by associated helical water flow heat exchangers and define axial gas flow chambers in which particulate carbon dioxide absorbent material is confined in contact with the heated walls. The heat exchangers are served by common supply and drain lines through water flow controlling connectors having flow dividing and uniting orifices.

Abstract: A cooking unit having a hood equipped with air cleaning structures and blowers for moving air through the cleaning structures. The air cleaning structures include a pre-filter having spaced baffles for collecting air borne greases and particles. A primary fiber filter and secondary charcoal and oxidizer beds are located downstream of the pre-filter. A high efficiency filter is located downstream of the secondary cleaning beds. A damper behind the pre-filter closes in response to an increase in temperature of the air moving through the filters. A separate heating unit is used to reactivate the charcoal.

Abstract: A cartridge for a catalytic ozone converter comprising an aluminum honeycomb core, a tubular metal shell surrounding the core and affixed thereto, metal rib support members fastened to the shell and to the honeycomb core, and a catalytic coating deposited upon the cell walls of the honeycomb core.

Abstract: In a first embodiment of the method and apparatus, the oxidant is loaded upon a support bed and is continuously regenerated by an ozone generator located upstream from the support bed. The ozone generator has a capacity less than the peak load requirement for the oxidant but fully regenerates the oxidant during low load periods. An ozone detector is located downstream from the support bed and includes a control circuit for selectively deactivating the ozone generator when the ozone downstream from the support bed exceeds a predetermined level. The support bed is composed of inert or adsorbing granular material. In a second embodiment, an aqueous solution containing a water soluble oxidant is applied to the support bed and is rinsed out following a purification cycle. The rinsed oxidant is replaced by fresh oxidant from a reservoir and the rinsed, spent oxidant is regenerated in an electrolytic or chemical regenerator and returned to the oxidant reservoir.

Abstract: A composite material is provided for the removal of ozone from a gaseous stream, which is made of a support matrix having coated on its surface an adhering layer of fine particles of Hopcalite. The support matrix is preferably made of a material that has a relatively board transition region. A particularly preferred material for the matrix is a polymeric ethyl vinylacetate.

Abstract: A chemical oxygen generator which is operable by movement of a starter member or thrust member comprises an outer closed container having an end wall on the interior of which an ignition actuation liquid container is mounted. The ignition actuation liquid container is made of a foil material and it is mounted over an ignition mixture container having an ignition mixture which when mixed with the liquid ignites so as to ignite a spark plug for the oxygen generator material.

Abstract: A cartridge for respirators for purifying expiratory air contains a chemical arranged in layers separated by partitions which are connected to a perforated central tube. The partition cooperates with a member spaced from a wall of the cartridge and a guide element disposed on the partition to provide alternate passage of the air into the layers.

Abstract: A chemical cartridge for giving off oxygen for use in respirators, comprises, a container having an oxygen-liberating chemical therein, with a spark plug engaged in the chemical and developing heat and oxygen when started to ignite and aid in the combustion of the chemical. A container of a shape to extend around at least the sides and one end of the spark plug is filled with water and it has an opening which is closed by a plug. The plug is made so that it will open during the burning of the spark plug and supply water to the chemical.

Abstract: A deodorization method which comprises allowing a bad-smelling gas containing (a) hydrogen sulfide and/or a mercaptan, (b) a sulfide and/or a disulfide and (c) ammonia and/or an amine to contact (1) firstly with activated carbon, (2) then with activated carbon or clay mineral having an acid supported thereon, and (3) subsequently with activated carbon in the presence of chlorine or bromine.

Abstract: The present invention is directed to a chlorine dioxide generation apparatus and to a method of generating chlorine dioxide utilizing this apparatus. The novel apparatus comprises a generator having a mix and dwell premix chamber interconnected with a venturi preferably, or to some other source of vacuum, undiluted reactants are permitted to mix and react in the premix chamber, prior to any dilution as by water or other fluid flowing through a venturi eductor to deliver the generated chlorine dioxide to its place of storage or utilization.

Abstract: A starting device for a chemical oxygen generator comprises a casing which has a chemical oxygen generating material therein and with a first wall above the material with an opening bounded by an annular sealing face and an opposite second wall below the oxygen generating material with at least one passage for the passage therethrough of an oxygen which is generated. A liquid ampule is disposed above the oxygen generating material and a thrust bolt is mounted in the opening of the casing over the liquid ampule and is movable when actuated from a starting position overlying and spaced from the ampule to an actuated position in which it penetrates and breaks the ampule. The coil spring is associated with the bolt and it biases the bolt in a direction toward the ampule. A sealing ring is disposed around the bolt and is located initially above the opening and moves with the bolt to engage into the opening and seal the top of the container when the bolt is in the actuated position.

Abstract: A portable air filter and absorber device for removing impurities such as gases and finely divided solids from the atmosphere includes a sectionalized cylindrical housing containing a blower mechanism operatively connected to a motor driving section. An activated carbon section is detachably mounted adjacent the blower section for removing odors and noxious gases from the atmosphere and attached in series to the activated carbon section is a fibrous section which acts to filter particulate material from the air prior to its entry passage into the carbon granule section. The sectionalized cylindrical housing includes a plurality of inner annular grooves which are adapted to matingly engage projecting end portions of the carbon granular section and the fibrous filter section to permit predetermined mounting of these sections in series to the housing.

Abstract: A breathing apparatus chemical canister includes a central vertical tube, around which there is a body of chemical granules covered by an upper sheet of filtering material provided with inner and outer downwardly extending flanges engaging the tube and the side of the canister. Disposed between the chemical body and filter sheet is an upper screen having inner and outer downwardly extending flanges pressing the filter sheet flanges against the tube and side of the canister to form seals. A similar lower sheet of filtering material and lower screen around the lower end of the tube support the chemical body and the flanges of the lower screen press the filter sheet flanges against the tube and side of the canister to form seals.

Abstract: Filter for removal of ozone from air, e.g. in aircraft cabins, comprising a porous and preferably light weight and thermally stable substrate, particularly an organic polymer such as polybenzimidazole, containing a film or coating of manganese dioxide. The article can be formed by treating the substrate with a permanganate solution under conditions to reduce the permanganate to MnO.sub.2.

Abstract: A candle for producing oxygen when ignited is mounted in the bottom of a chemical canister that is to be inserted in an open-bottom breathing apparatus receptacle provided with a depending projection. A primer for igniting the candle extends through the bottom of the canister and is exposed in the top of a firing mechanism housing secured to the canister bottom. At one side of the primer a hammer has one end pivotally connected to the housing on a transverse axis, with a spring urging the free end of the hammer into contact with the primer. Pivotally mounted in the housing on a transverse axis below the hammer is a trigger having one end engaging the bottom of the free end of the hammer in its cocked position, with the opposite end of the trigger positioned to be engaged by the receptacle projection when the canister is moved up into the receptacle, whereby to turn the trigger to disengage it from the hammer in order to release the hammer.

Abstract: Production of a device or filter for removal of ozone from air, e.g. in aircraft cabins, by depositing an oxide film containing manganese dioxide on a substrate, particularly a light weight thermally stable substrate, e.g. polybenzimidazole, by treatment with a permanganate solution containing a soluble ceric salt such as ceric ammonium nitrate, and preferably also a dichromate such as sodium dichromate, to form a dense strongly adherent film or coating of MnO.sub.2, ceric oxide and preferably also chromic oxide, on the substrate. A solution containing an oxidizable organic component such as abietic acid can be first applied to the substrate, followed by treatment with the above permanganate solution.

Abstract: A carbon dioxide absorbent cannister in underwater breathing apparatus of e forced recirculation type. The cannister includes a plurality of stackable condenser elements that serve to cool exhaled gas of high relative humidity so that water, necessary to the desired carbon dioxide removing reaction, is condensed from the gas. The condenser elements are characterized by a plurality of radial, blade-like legs, the outer ends of which are in heat transfer relation to the cannister wall, and by a conical diffuser disc that serves as a heat sink.

Abstract: A sterile air recycling module is mounted to a wall of a room and includes a housing having an outlet for discharging sterile or clean air into the room, opposed grilled inlets for controlling the volume of air drawn into the interior of the housing from the room, and an inlet for fresh air or plant conditioned air, a supply pressure plenum chamber within the housing for discharging air through a high efficiency particulate air (HEPA) filter which is in fluid communication with the housing outlet, and a blower within the housing for withdrawing air from a negative pressure plenum within the housing and an outlet in fluid communication with the supply pressure plenum, the housing inlets being in fluid communication with the negative pressure plenum.

Abstract: A catalytic unit for treating gases, particularly exhaust gases of internal combustion engines, comprising a housing, adapted to be connected in an exhaust gas line, and a monolithic carrier body provided with a catalytic agent. The carrier body is mounted within the housing by an intermediate layer arranged in compression between the circumferential surface of the carrier body and the housing. According to the invention, the intermediate layer is so compressed by the surrounding housing that it exerts a pressure on the surface of the carrier body in the range of 20 to 80 N/cm.sup.2.

Abstract: A dispensing package for a volatile composition such as a room deodorant and the like that comprises a container having at least two chambers. In one of the chambers is packaged a bed of inert solid, adsorbent granules having absorbed thereon a volatile ingredient for dispensing into the atmosphere. The container has an outlet vapor port in a wall of the chamber and a second vapor inlet port which communicates with a second chamber; the latter having a collapsible wall surface. A check valve is provided in the wall of the second chamber to permit air intake whereby volatile components adsorbed on the surface of the solid bed of granules can be dispensed into the atmosphere by pumping the collapsible wall of the second chamber, thereby forcing air through the bed of solid granules and desorbing of the the volatile adsorbate, which is dispensed into the atmosphere.

Abstract: An air-regeneration filter is provided having air regeneration agent means toward one end opening thereof and drying agent means toward an opening at the other end thereof. The direction of air flow through the filter can be chosen according to the requirement for conditioning the air to be treated as to oxygen and moisture content.