Abstract: A kit for formulating and generating different mood modifying or therapeutic aromas, the kit including a battery of vials each containing a different essential fragrance oil, thereby making it possible for a user to compound a blend of oils producing an aroma having the desired effect. Also provided is a vessel formed of cermaic or other dielectric material and having a removable cover. The inner and outer surfaces of the vessel have a glaze thereon whose composition is such that when the vessel is placed in a microwave oven and subjected to microwave energy, this energy is absorbed only by the glaze, as a consequence of which the interior of the vessel is heated to an elevated temperature and acts to volatilize a charge of oil deposited in the vessel by the user, the constituents of the charge being derived from oils taken from selected vials as formulated by the user.

Abstract: A gas generator chemically generates a gas from a chemical reaction between two reagents contained within a common container. The reagents are normally separated by a gas generation chamber into different regions of the container in the absence of gas generation therein. A reference pressure source of a predetermined pressure forces the two reagents into contact with each other when the pressure of gas in the gas generation chamber is less than the predetermined pressure. A valve in fluid communication with the gas generation chamber is provided to withdraw the generated gas from the chamber when OPEN. As the gas flows through the valve from the chamber the gas pressure in the chamber drops permitting more mixing of the reagents. When the chamber pressure becomes equal to or higher than the predetermined pressure applied by the reference pressure source, the reagents become separated again and gas generation ceases.

Abstract: A method of supplying scents to a room of a motor-car. In this method, a scent holder is provided within the room of the motor vehicle, the scent holder containing scents bearing materials for emitting different scents useful for a driver of the motor vehicle. Reference data for respective driving conditions of the motor vehicle are stored, the reference data indicating need for supply of respective scents. After storing the reference data, a driving condition of the motor vehicle is detected for producing an electric drive signal representing the driving condition. The drive signal thus produced is compared with a corresponding reference datum for determining whether or not the detected driving condition requires one of the scents contained in the scent holder. When the detected driving condition requires the one scent, one scent bearing material containing the one scent is selected. Then, the one scent from the one scent bearing material is supplied to the room of the motor vehicle.

Abstract: A consumable article for diffusing active volatile substances, in particular perfume, into the ambient atmosphere, the article comprising a support element of shrinkable material, in particular heat shrink material, with the volatile substance being absorbed in the support element. The invention also provides a method of diffusing volatile substances, in particular perfume, by means of an article of this type, and also a device for implementing the method.

Abstract: A device for processing respiration gas with a filling of an oxygen-releasing chemical in a cartridge that can be received in a housing to which the respiration gas connection can be connected. The filling can be accommodated in a simple, inexpensive cartridge without having to give up protection from water vapor, as a result of which an inexpensive consumable part is to be obtained. To achieve this, the cartridge 1 is closed off with at least one bottom 8 that can be pushed into the inside of the cartridge and has openings 7 in it and is surrounded with a foil 10 that is impermeable to water vapor in a vacuum-tight manner (FIG. 1).

Abstract: A single compact air cleaner unit includes a motor and fan assembly, a mechanical pre-filter, an electrostatic precipitator, a main filter cartridge which is easily removable and which contains both a synthetic mesh media with electrical charges embedded therein and a plastic screen impregnated with activated carbon powder, ionizing needles positioned adjacent a fresh air outlet, an air quality sensing device having an adjustable control for selecting a level of air quality to be achieved, and an automatic control cooperatively associated with the air quality sensing device to keep the unit energized as long as the air being sampled does not meet the selected air quality level.

Abstract: A unitized deodorizer for placement in restricted locations where odor control is desirable. The unitized deodorizer includes a portion of conventional sodium bicarbonate (NaHCO.sub.3) or baking soda which is provided with or without a container. In its non-contained form, a unitized deodorizer is compressed or chemically bonded into a substantially solidified unit of selected shapes including round and block. In its contained form, pulverized sodium bicarbonate is provided within a number of containers composed of a variety of materials including plastic, flexibly woven natural or synthetic cloth, or cardboard.

Abstract: An apparatus and method for deodorizing a gas mixture including air and a malodorous substance having a flow passage for the gas mixture and a fan for inducing air flow in a predetermined direction through the passage. An ultraviolet lamp for generating uv rays below a critical wavelength is in the flow passage for generating ozone from the air in the gas mixture. An ozone-decomposing catalyst layer is in the passage for contacting the gas mixture, and an ozone-decomposing ultraviolet lamp for generating uv rays above critical wavelength is positioned to irradiate the layer directly. The intensity of the radiation of the two layers is controlled to avoid the discharge of ozone from the downstream end of the passage.

Abstract: A chemical oxygen generator has a chemical mixture based on an alkali-metal chlorate (NaClO.sub.3) which constitutes the charge of a cartridge having an ignition device and an oxygen outlet. This oxygen generator is improved so that the charge is insensitive to shock and so that it can be configured in any desired outer form and size and that an advancing reaction zone is assured without a further assisting device. The charge includes a tight bed of chemical pellets which lie one against the other to form the smallest possible contact surfaces.

Abstract: Apparatuses and methods for selectively absorbing undesirable organic and inorganic vapors and gases from ambient air while providing oxygen level enhancement of the treated air are disclosed.

Abstract: A forced air handling system filter is provided including an inwardly opening, channel-shaped peripheral frame from which corresponding peripheral portions of a panel-like filter batt is supported and an elongated bar of scented material is provided and stationarily supported within a pocket of the frame opening inwardly of the inner periphery thereof. The bar includes a scent impervious cover completely enclosing the bar and one longitudinal edge of the bar projects outwardly of the aforementioned pocket toward the remote side of the frame and that portion of the cover disposed over the bar marginal portion includes a tear strip extending longitudinally thereof. The tear strip is adjustably tearable from the remainder of the cover to expose a corresponding portion of the bar for scent release therefrom.

Abstract: A deodorizer for refrigerators or the like includes a deodorizing element composed of an adsorbent adsorbing odor components contained in the air in a storage compartment containing foodstuffs and a catalyzer oxidizing and decomposing the odor components adsorbed by the adsorbent, and a heater energized and deenergized for applying heat to the deodorizing element. The odor components contained in the air in the storage compartment are adsorbed by the adsorbent of the deodorizing element during the heater deenergization period. When the heater is energized to apply heat to the deodorizing element, the odor components adsorbed by the adsorbent are drawn out from the adsorbent and brought into contact with the catalyzer. The odor components are oxidized and decomposed by the catalyzer.

Abstract: A high flow sodium chlorate oxygen generator assembly (10) of a relatively small diameter. The generator assembly includes a chlorate candle (12) mounted within a containment vessel (14, 16, 18), the chlorate candle being provided with a deep conical recess (54) which is thinly coated with a rapidly combustible material (56). Ignition of the rapidly combustible material is achieved by extending a hollow ceramic tube (58) from a primer (38) located at one end of the containment vessel, the hollow tube directing the flame from the primer, when ignited, towards the center of the deepest part of the conical depression. The above construction provides a high surface area for burning, and also intensifies the heat flux within the chlorate candle thereby substantially increasing the rate of oxygen output over known chlorate candles of comparable diameters.

Abstract: An in-line air purifier for removing water, oil and carbon monoxide from a compressed air stream comprises a two-stage assembly in which the first stage includes replaceable cartridges for promoting coalescence of water and oil into droplets and removing such droplets from the air stream. The dried air is then routed to a second stage where it is passed through a replaceable cartridge containing a bed of activated charcoal for removal of odor-causing matter, and then through a further replaceable cartridge containing a bed of catalytic pellets which function at room temperature to remove carbon monoxide. The resulting purified air is routed through a manually adjustable pressure regulator to a purifier outlet.

Abstract: A deodorizing apparatus adapted to be placed in an enclosure to deodorize the bad smelling components of the foul air within the enclosure. The body has an interior free space and a ozone-decomposing layer. Ozone is generated within the free space and flows in contact with the layer so that it is decomposed before it can leave the body. The ozone is formed either by silent (corona) discharge or by ultraviolet radiation in the free space, and the energy supplied is sufficient to cause the ozone to flow outwardly into contact with the layer and to draw in foul air through the layer so that the decomposing ozone effectively deodorizes by oxidation the bad smelling components. The flow through the device is sufficient to deodorize the entire enclosure.

Abstract: A chemical oxygen generator for use in respirators and resuscitators for providing an oxygen reserve includes oxygen in chemically bound compacts or oxygen single-candles and the oxygen is released when needed in the course of a chemical reaction. The oxygen single candles are fitted together axially in a canister in modular construction with incandescence elements therebetween. In the cover of the canister, opposite the upper end wall of the first single candle, there is an igniting device, and in the bottom, an outlet opening for the escape of the released oxygen. As soon as the first oxygen single-candle is activated by means of the igniting device, the oxygen reaction sets in and a reaction front moves in the direction of the next single candle. The reaction transmission to the next single candle occurs through the intermediate incandescence element.

Abstract: A disposable rebreathing canister is disclosed for administering oxygen and anesthesia to patients. The canister essentially comprises a housing for a scrubber, including a manifold plate and a rigid container, and a flexible liner disposed within the rigid container. The liner forms an imperforate barrier between the interior of the rigid container and the manifold plate. A scrubber disposed between the manifold plate and liner chemically reacts with gases conducted to it through one of a pair of coaxial passages formed in the manifold plate. Reacted gases are then moved through a tortuous passage either back to the other one of the coaxial passages or removed through an exhaust port.The interior of the rigid container connects with a source of pressure that allows the flexible liner to be collapsed, thus forcing treated gases, fresh oxygen and anesthesia into the lungs of the patient.

Abstract: Oxygen generator for cartridges, having a pressure tank and a cartridge holder connected thereto. The cartridge holder is divided by a gas-tight separable joint into two halves, and its interior is in communication through an opening with the interior of the pressure tank. To maintain functionality over a long period of time, the bottom half of the cartridge holder is joined to the pressure tank with good thermal conductivity in the area of the separable joint and is in communication with the pressure tank through an unplugged opening which is narrow in proportion to the inside cross section of the lower half. Further, the upper half of the cartridge holder is superimposed on the bottom half directly at the top of the pressure tank and is provided with a cooling structure.

Abstract: To provide the perfume carrier of an artificial flower both with a high absorption capacity and with high mechanical stability, a random-fiber fleece of rayon staple fibers is mechanically stabilized by needle punching and then compressed in a press of which all the forming surfaces are heated.

Abstract: A chlorine gas filtering material suitable for use in a high temperature oxygen environment, and a method of making the filtering material. The filtering material is prepared by impregnating a porous manganese dioxide and copper oxide hopcalite catalyst prepared by the carbonate method with sodium hydroxide. The process of making includes the steps of mixing the catalyst into a sodium hydroxide solution and then vacuum baking the impregnated catalyst for at least 8 hours, and preferably for 16 hours at a temperature of 240.degree. F.-260.degree. F.

Abstract: Organosilicon quaternary ammonias and other microbicidal compounds are bound to the surface of discrete inorganic particles such as glass spheres. Inorganic particles coated with the microbicidal compounds are used in hospital fluidized beds, air filters, and other products in which microbicidal qualities are desired.

Abstract: A portable oxygen inhaler comprises a chlorate candle, a mask, a tube connecting the chlorate candle and the mask, and a handily-sized case housing these and other component parts as an integral unit. When an actuation pin provided on the chlorate candle is pulled out of the case, oxygen is immediately generated and supplied to the mask.

Abstract: Apparatus for refilling compressed-gas bottles, having a threaded connector and valve, especially for small gas bottles. A cartridge holder serves to hold jacket-less, oxygen-yielding cartridges whose oxygen can be transferred from the interior of the cartridge holder to the compressed-gas bottle. To solve the problem of achieving the inexpensive refilling of compressed-gas bottles with little oxygen loss, without endangering the operator by the development of undue heat, the cartridge holder of the invention preferably is made in the form of a substantially closed pressure body surrounding the cartridge as closely as possible. Also, a threaded connection is provided for the installation of the pressure body on the compressed-gas bottle. A gas passage serves for the transfer of the oxygen to the compressed-gas bottle connector. Furthermore the pressure body comprises cooling ribs and a heat guard with ventilation openings communicating with grooves between the cooling ribs.

Abstract: A fragrant scented air filter particularly adapted for use in conjunction with interior building/air conditioning systems which includes a polygonal frame of a U-shaped inwardly opening cross-section defined by a bight portion and a pair of legs, a pad of air permeable, porous, fibrous filtering material having a peripheral edge portion bordered by the frame, and at least two solid rods of fragrant scented material spanning the frame in embedded relationship to the pad and in spaced parallel relationship to each other whereby air can freely pass the same with minimum velocity reduction and maximum fragrance absorption.

Abstract: A system for deodorizing and decontaminating autopsy rooms where autopsies are conducted on decomposed human remains wherein large amounts of noxious and malodorous gases are given off comprising an exhaust fan for removing large volumes of air and noxious gases substantially instantaneously from the specific autopsy environment and directing the air and noxious gases to a chamber, a burner associated with the chamber such that the flammable decomposition gases being exhausted are bombarded by a flame, ignited, burned and deodorized, and a duct associated with the chamber for directing the air and burned gases to the exterior of the building.

Abstract: A generating device for producing a laser energizing gas in the singlet delta, electronic state comprising a vacuum chamber; a tubular reaction chamber positioned within said vacuum chamber, said reaction chamber having a closed end and an oppositely disposed open end; means positioned in said closed end for introducing a flow of a gaseous reactant into said reaction chamber; means positioned adjacent said closed end at an angle perpendicular to the position of said gas introducing means for introducing a stream of a liquid reactant into said gas flow to effect a chemical reaction therebetween and the generation of a laser energizing, singlet delta gas; and means for interconnection to a lasing device for directing a flow of said generated, singlet delta gas to a lasing cavity.

Abstract: A process for deodorizing polluted air, wherein the air to be deodorized is washed in a washing apparatus with an aqueous solution of hydrogen peroxide. The solution is circulated in a closed circuit while ozone is introduced either directly into the air to be treated or directly into the aqueous solution which is thus regenerated. The initial weight percentage of hydrogen peroxide in the aqueous solution is within the range of 0.5% to 10%.

Abstract: Apparatus for treating a supply of compressed air containing carbon monoxide but substantially devoid of free water and of relative humidity sufficient for comfortable breathing, to render it suitable for breathing purposes. The apparatus comprises four sequential filters for preliminary removal of bulk liquids, particulates, carbon dioxide, oil and water aerosols, and hydrocarbon vapors and odors and a pressure vessel (21) having a heater (39) at its inlet to which the air is supplied without any drying treatment. The heater comprises at least one heating element formed of a material which exhibits a rapid increase in electrical resistance at a temperature of from 101.degree. C. to 110.degree. C. From the heater the air passes to and through a bed of granular catalyst material within the pressure vessel, the catalyst oxidising CO in the air to CO.sub.2. A temperature sensor (37) within or immediately downstream of the catalyst bed controls the heater to maintain a mean bed temperature of not less than 100.

Abstract: A chemical oxygen generator includes a candle in which oxygen is present and which is chemically combined and which is ignited by starting means to initiate the generation of the oxygen. This takes several seconds before a substantial quantity of oxygen is provided. Because a user of this oxygen must be supplied with the oxygen for respiration immediately, the invention includes a generator which has a pressure space, preferably above, below and around the oxygen candle which is located in the space and which is filled with compressed oxygen. The generator includes a member which is actuated upon release of the starting means for the oxygen to permit outward flow of the oxygen in the pressure space which is supplied until the oxygen being released from the candle is produced by the ignition of the candle.

Abstract: Potassium superperoxide compositions contain an additive product selected from the oxides of alkaline-earth metals and magnesium, particularly calcium oxide CaO, incorporated preferably in a concentration between 2 and 30% by weight, based on the weight of the total composition. These compositions of KO.sub.2 are used to regenerate breathable atmospheres, particularly as regenerating charges in closed circuit individual rebreathing devices.

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: The object of the invention is a safety device for packagings which contain pyrophoric metallic catalysts that emit hydrogen. The apparatus consists of a hollow stopper, open upward, in the bottom of which a pressure relief valve is fitted, an oxidation catalyst arranged in the stopper, and a gas-permeable closure covering the upper side of the stopper.

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: An oxygen supply apparatus, particularly for use by a coal miner, has a plurality of housings mounted on a belt, which is worn by the miner, with each housing having a cartridge of oxygen generating material therein and removable from the bottom thereof for replacement. Each housing has a cover with a resiliently biased shaft supported thereby for relative movement to activate the oxygen generating material in the cartridge. The shaft functions as a timer activator so that the timer is set when the shaft is activated. The timer produces an alarm signal just prior to the expiration of time for depletion of oxygen from the cartridge within the housing. Each of the covers has a chamber receiving the oxygen from the cartridge and supplying it through tubing to oxygen receiving means worn by the miner such as a mask, for example.

Abstract: An improved method and apparatus for producing dry excited singlet delta oxygen for use in iodine lasers.

Abstract: An electrolytic device adapted for mounting on the interior wall of a container housing sorbent chemicals for detection and display of moisture content. A sandwich or tab-type probe includes superhydroscopic MgClO.sub.4 or CaSO.sub.4 particles which resist electrical current flow when dry and have a higher affinity for moisture than the sorbent chemicals in cartridges or filters. Moisture intrusion is drawn to the anhydrous MgClO.sub.4 or CaSO.sub.4 particles changing their ohmic resistance and thereby enabling visual and nondestructive detection of the moisture intrusion into the container or cartridge. The probe is spaced away from the sorbent chemicals avoiding the transfer of mechanical stresses and any additional pressure drop through the sorbents, thereby permitting the device to be used in combination with a wide range of sealed containers and air filters.

Abstract: A singlet delta oxygen generator 10 comprises a static or motionless mixer 12 having a gas inlet 14 through which chlorine gas reactant is introduced into the static mixer and a liquid inlet 16 through which the basic sodium hydroxide/hydrogen peroxide solution is introduced. As the reactants pass through static mixer 12, the gaseous products and liquid by-products are formed. The product stream passes through liquid/gas separator 26 wherein the liquid by-product stream is diverted to sump 28 and the gaseous product stream is conveyed to a low volume trap 30. The temperature of trap 30 is maintained at approximately -80.degree. C. so as to solidify and thereby remove any water or hydrogen peroxide vapor which might remain in the product stream. From the low volume trap 30, the product stream is then conveyed to chlorine trap 34 wherein any excess chlorine gas present in the system is retained.

Abstract: An environmental enclosure or clean room composed of a structural frame which supports a flexible transparent plastic film which defines a sealed chamber or room. Air is introduced into the chamber through a two-stage filter system and is exhausted through a filter duct. Located adjacent the chamber is a small entry compartment, and the entry compartment has sealed doorways leading to the exterior and to the interior of the sealed chamber respectively. To inspect objects in the sealed chamber, the operator enters the entry compartment and puts on a hermetically sealed suit that is normally stored in the compartment. With the operator sealed within the suit, the entry compartment is sterilized and the operator can then enter the main chamber. The suit has a provision for receiving air from the outside and for discharging air from the suit to the exterior of the chamber.

Abstract: A fireproof respiratory face mask for use in fires and smog has a granular expanded calcium aluminum silicate base material coated with layers of soda lime, active carbon dust, copper dust soaked into a caustic soda solution and manganese dioxide dust held between two layers of ceramic fiber fleece-like materials felted together to hold the coated granules. The face mask is stored in an easy opening ceramic fiber fireproof package with a pair of fireproof gloves.

Abstract: An oxygen respirator container for an oxygen releasing chemical cartridge comprises a cylindrical bottom part having a bottom wall and an interior side wall with a plurality of spaced apart raised ribs with a recess between adjacent ribs. An oxygen generating cartridge is disposed in the bottom part on the bottom wall and over the ribs of the side wall and at least one holding element is disposed in the recess between adjacent ribs between the side wall in the container. The holding element has a top head portion which projects outwardly from the holding element into the bottom part and overlies the top edge of the cartridge so that it holds the cartridge over the bottom wall. The side wall of the container also includes an indented part adjacent the top of the cartridge with a top ledge of the indented part defining a holding nose. The holding element has a deflectable tab portion which engages in the indented part under the nose.

Abstract: In a nuclear facility such as a reprocessing plant for nuclear fuel rods, the central air cleaner discharging ventilating gas to the atmosphere must meet preselected standards not only as to the momentary concentration of radioactive components, but also as to total quantity per year. In order more satisfactorily to comply with such standards, reprocessing steps are conducted by remote control in a plurality of separate compartments. The air flow for each compartment is regulated so that the air inventory for each compartment has a slow turnover rate of more than a day but less than a year, which slow rate is conveniently designated as quasi-hermetic sealing. The air inventory in each such compartment is recirculated through a specialized processing unit adapted to cool and/or filter and/or otherwise process the gas. Stale air is withdrawn from such recirculating inventory and fresh air is injected (e.g.

Abstract: A portable gas cleaning unit having a box-shaped housing supporting filters operable to remove particulates, pollens, odors, and smoke from a gas, as air. A motor driven fan located within the housing moves gas through the filters and discharges cleaned gas to the environment outside of the housing. In one form of the invention, the motor is a D. C. motor powered by a 12-volt battery. The filters are mounted in a recess in the top wall of the housing and include a coarse fiber filter and a particulate charcoal filter. A protective open rectangular grid is located over the fiber filter and is mounted with a tight fit on the top wall to hold the filters in the recess. An open top tank is located within the housing for carrying a liquid, as water. Vapor plates mounted on the tank are used to facilitate the evaporation of liquid into the gas flowing through the housing.

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 method of manufacturing a chemical oxygen generator using two plates and a chemical substance which produces oxygen through a chemical reaction and an isostatic pressing device, comprising, forming at least one depression between two flat portions of each plate, placing the plates together by superimposing their flat surfaces together in the isostatic press, and arranging their depressions so that they oppose each other, and filling the depressions with the chemical by inserting the chemical axially into the depression and deforming the plates by pressing the pressing device to close the depressions along the flat surfaces at each end and to compress the chemical within the depressions. The invention construction advantageously includes plates having two sets of depressions or one continuous serpentine depression in each plate, which are arranged in mirror orientation and closed at one end and contain an ignition device for the chemical at the opposite end.

Abstract: A replaceable cartridge-type oxygen generator is described including a quick-opening pressure casing containing a chemical oxygen-generating cartridge having a severable hermetically-sealed container and an ignition device, the casing further including an actuating device capable of actuating the ignition device only when the cartridge is disposed within the casing and the casing is closed. The casing further includes a high-volume vent automatically effective in case of the sudden build-up of a high pressure, such as may be caused by the ignition of a contaminant. Also described is an oxygen supply system including a plurality of such generators connected to an outlet manifold having pressure sensing means controlling the ignition of the cartridges.

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: A control and monitoring system for an oxygen generation device having a plurality of chemical oxygen generation elements sequentially decomposed to continuously generate oxygen.

Abstract: An adapter, particularly for medical gas systems which require sanitary interconnections, comprises a housing which has a gas flow passage therein containing a filter or other sterilizing device with a connection at one end permitting easy coupling to the gas supply line and the housing has another connection for the discharge of the gas after filtering to the place of use.

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: A safety enclosure is disclosed which provides a portable self-contained ultra clean enclosed space environment, with easy access to the interior of the enclosure and which can be operated at relative positive, zero or negative pressure, depending on the usage conditions required so as to provide biological protection for an animal handler or investigator, to reduce contamination of the material inside the enclosure, and to prevent escape of noxious material to the outside.