Abstract: A humidifier meters water into a chamber in which it is subjected to ultraviolet light for a predetermined period of time sufficient to destroy microorganisms whereupon the static quantity of water is transferred to a water dispersing unit which discharges the decontaminated water in a finely divided form into the environment.

Abstract: The invention is a method and apparatus for generating vortex rings in a fluid medium. The apparatus is immersed in a body of water, and an air pump feeds gas in the form of air directly into the base of the apparatus through a gas inlet or the gas is provided from a container with a Finite quantity of gas. A nozzle extends from the gas inlet to a pocket located on an underside of a lever. As air is pumped into the pocket, the air forms a single bubble, and when the force of the air mass exceeds the weight of the lever, the lever rises and the air mass travels as a cohesive unit to an exit nozzle. When the lever reaches the maximum height displacement defined by a resilient upper stop, the air exits the lever through a nozzle and forms a vortex ring.

Abstract: A humidifier apparatus has a source of water such as a tank, joined through an inlet valve to a manifold providing water flow from the inlet valve to a vent stack and a mist stack. The stacks and extend upwardly from the manifold and are positioned for sharing a common water level. Both stacks are open at their top. An ultrasonic mist generator is positioned below the mist stack and is enabled for generating a mist within the mist stack. The vent stack provides a water sensor enabled for detecting a preferred water level in the vent and mist stacks and for controlling the inlet valve to maintain this preferred water level.

Abstract: A bubbler for use in vapor generation systems that minimizes splashing and the formation of aerosol droplets of liquid, which are carried out of the bubbler in the vapor stream and result in erratic mass transfer of the process chemical. A closed stainless steel vessel contains a carrier gas distribution plenum that distributes the carrier gas to a plurality of small diameter generator tubes, which are submerged into the process chemical. The length, inside diameter and number of the generator tubes are designed to inject a high velocity, small diameter stream of carrier gas into the liquid such that a long small diameter cylinder of carrier gas is created in the liquid. The surface tension of the liquid-gas interface causes the cylinder of gas to be pinched off at intervals along the length of the cylinder to produce a plurality of small bubbles the diameter of which is largely independent of the carrier gas flow rate.

Abstract: In a method of and apparatus for producing sub-micron bubbles in liquids and slurries, gas is maintained on the interior of the gas permeable partition at predetermined pressure. Relative movement between the gas permeable partition and a liquid forms sub-micron sized bubbles in the liquid.

Abstract: A bifurcated fan (1) which draws in atmospheric air through air/liquid contact blocks of plastic grids which are sprayed with the liquid to be treated. The blocks change position in order to be sprayed on both front surfaces alternatively and thus remain clean. The liquid evaporates in the contact blocks and the concentrate is dehydrated in a secondary laminar evaporation base. The arrangement into converging sectors provides a geometry with minimal aerodynamic losses in a liquid with organic matter. The device includes a central tank which facilitates an aerobic biopurification process aided by the oxygenation in the contact blocks. Thermal exchanges may be included at the air inlet, using residual energy, particularly from thermal engines to which it provides refrigeration and cleaning of exhaust gases.

Abstract: Provided is a hand-held, portable, battery operated, reliable, and inexpensive, ultrasonic, visible vapor generator or fog generator for use in contamination sensitive areas, such as clean rooms. The ultrasonic fog generator is useful for visualizing laminar airflow between rooms, around equipment, around ventilation systems, and the like. The ultrasonic fog generator includes a housing and a battery pack sized to be carried by a user. The fog generator of the present invention, therefore, is capable of being easily moved around a room and does not take up valuable floor space in the clean room.

Abstract: The present invention provides systems and methods for delivering a controlled amount of scent to a target user. Such methods and systems will preferably provide carefully direct boluses or streams of scent(s) to a single or small group of individual(s) using a bolus generator so as to avoid cross-contamination of scents with other persons and other locations. The present invention preferably delivers the bolus of scent as an air ring. The scented air ring moves through the air between the scent generating device directly to the user as a cohesive unit of air. This phenomenon is similar to a “smoke ring” exhaled by a smoker. The scent ring can be directed with accuracy to a localized target as small as the nose of a single user, such that the entire dosage can be delivered to only the user's direct vicinity. Such targeted delivery minimizes the amount of scent that must be delivered to achieve a desired level of scenting at the target location.

Abstract: A process is supported in a mixing tank providing a partition dividing the mixing tank into two separate side-by-side cells, the mixing tank further providing a fixed ceiling. A vertical beam engages with and extends upwardly from the mixing tank above the fixed ceiling of the tank and terminates at a pivotal coupling. A supporting beam is joined medially with the pivotal coupling of the vertical beam, for see-saw type tilting motion about the vertical beam, the supporting beam providing a further pivotal coupling at each terminal end. A pair of vertical linear struts, each is pivotally coupled at an upper end with one of the pivotal couplings at the terminal ends of the supporting beam, and each rigidly is joined at a lower end to a buoyancy shell within one of the cells. Each of the linear struts passes through an aperture in the fixed ceiling of the mixing tank, so as to accommodate lateral motion of the linear struts as the support beam moves in a see-saw type tilting motion.

Abstract: An improved fuel air mixture apparatus which enhances the degree of mixing of fuel with air. The fuel-air mixture device includes a primary air passage having an inlet, an adjustable throttle and an outlet; a secondary air passage having an inlet and an outlet to the primary air passage between its adjustable throttle and its outlet; a nozzle having an orifice opening into the secondary air passage for introducing a flow of fuel therein; a needle arranged co-axially of the nozzle with its small diameter at least normally extending from the orifice into the secondary air passage, the needle being axially moveable to provide variability of the orifice and control of the fuel flow; a control device for directly linking or controlling the position of the needle to the position of the adjustable throttle in the primary air passage for adjustment of the orifice of the nozzle.

Abstract: A mist humidifier has a lower space receiving a main water tank for storing water and an upper space divided into an evaporative cavity and a blower cavity. The evaporative cavity is divided into a first water chamber for storing water fed from main water tank having a float ball safety valve, a second water chamber for receiving a nebulizer for vaporizing water for creating cool mist, a third water chamber for receiving a heater for heating water for creating a hot mist, and a water supply tube provided on the bottom of the first water chamber in fluid communication with the second and third water chambers so as to keep all water chambers at a constant equal level, whereby a mist having a temperature at a constant level is discharged into the environment when the humidifier is activated.

Abstract: An alcohol separator is provided with an atomizer which supplies a mist of atomized alcohol solution to one region of a flow path, and an electrostatic collection device which uses an electrostatic field corona discharge to capture, liquefy, and recover alcohol solution mist generated by the atomizer.

Abstract: A sensualizer or sense-simile machine reproduces smells and flavors using a cylinder housing smell and flavor cartridges. Selected cartridges deposit predetermined amounts of sense substances onto a carrier to reproduce the desired smell or flavor. The cylinder rotates to bring rows of cartridges to a position for depositing the substances onto the carrier. The carrier moves back and forth along a path under the row of cartridges and stops momentarily under the cartridges selected to reproduce the particular smell or flavor. An air blast disperses the substances into a tube for delivery to a location where the senses can be aroused. The machine can be activated from a remote location over a standard telephone line or accessed through a computer over a modem. With a computer or other input device, simulations and reproductions can be done locally.

Abstract: An apparatus for vaporizing a liquid material and supplying the material in a gas phase, in which a liquid material for CVD is introduced into a vaporizer at a controlled flow rate, atomized by an ultrasonic atomizing device disposed at the inside or the outside of the vaporizer, heated by a circular flow of a carrier gas and vaporized. When a liquid material for CVD is supplied to a CVD apparatus in the production of semiconductors, the concentration of the material is controlled easily in the vaporization, the concentration of the material in the gas can be changed quickly in response with the change in the flow rate of the material, decomposition of the material does not occur and the operating condition of a CVD apparatus is not restricted.

Abstract: A compact, small size humidifier which may be used as a portable humidifier. The humidifier may include the appropriate electrical plugs and internal electrical transformer to allow use in different countries with different voltages and electrical power systems, e.g., 110V use in the United States, 220V use in Europe, etc. The humidifier also includes an opening for receiving a number of different sockets allowing use of different sized water bottles as the water tank. The different sockets may be detachably affixed to the humidifier body in appropriate recesses or holding arrangements so that the different sockets are easily made available to the user. The humidifier may also include a low water detection assembly which utilizes, e.g., two projecting probes positioned in the water retaining chamber, to indicate the presence of a sufficient amount of water.

Abstract: An improved method and device for decontamination of a contaminated process area is provided whereby a fine aerosol of an encapsulant for use in encapsulating the contaminants within the contaminated environment is generated. The aerosol is generated by a plurality of ultrasonic transducers located below the surface of a reservoir containing a capture liquid. The output of the transducers is focused to a point near the surface of the liquid to cause a surface disturbance which results in the formation of an aerosol of encapsulant from the capture liquid. A pressurization fan is used to force ambient air through the pressurization chamber to transport the aerosol to the process area to be treated. The aerosol forms a thin coating of encapsulant over the hazardous material thereby allowing the hazardous material to be safely removed from the process area or permanently adhered to the walls of the process area.

Abstract: In a method and an apparatus for converting a liquid flow into a gas flow, a liquid flow is introduced into an evaporation volume, the liquid flow is dispersed so as to enlarge the surface of the liquid, the dispersion being not caused by a change of pressure and taking place without admixture of a medium, and the evaporated liquid flow is conducted out of the evaporation volume.

Abstract: A device for generating foam by the Venturi effect mixes liquid and gaseous phases. The device has a liquid insertion nozzle on the same axis as a Venturi stage having a converging portion disposed facing the nozzle, a throat of diameter "D", and a gas inlet coaxial with the nozzle and in communication with the converging portion. In operation, the gas is sucked in by the Venturi effect and directed towards a mixing chamber connected to a foam outlet. Mixing between the two phases takes place in a free jet, and the diverging portion of the Venturi has at least three zones of progressive cone angles, with discontinuities between the zones giving rise to a cavitation phenomenon, and opening out into a turbulent chamber.

Abstract: Disclosed is a method and apparatus for producing gas bubbles of a uniform ize in a liquid. First, the liquid medium flows over a wall or other liquid containment surface. Gas is then emitted into the liquid medium to form gas bubbles from an aperture in the wall at a bubble formation position. A standing wave is then established in the liquid medium at the aperture. It is found that the bubbles formed at the aperture are of a substantially uniform size.

Abstract: A counterbalanced, dual submarine-type liquid mixer provides a pair of counterbalanced mixing devices that move at opposing ends of a balance bar suspended above the surface of a liquid to be mixed. The bar is able to pivot so as to vertically move its ends alternately between a raised and a lowered position in such a manner that when one of the mixing devices is in a raised position in the liquid, the other of the mixing devices is in the lowered position and each of the two mixing devices tends to counterbalance the other. Each mixing device is buoyed upwardly in the liquid by the buoyant force of a gas captured below a concave surface of the mixing device and also by the negative buoyant force of the other mixing device when it has exhausted its buoyant gas. Alternately, each of the mixing devices, on its downward stroke is moved downwardly by its own weight (negative buoyancy) and by the buoyant action of the other mixing device which moves simultaneously on its upward stroke.

Abstract: This invention provides apparatus and methods for stabilization of ultrasonically generated nutrient fog. To eliminate the sensitivity to the humidity and temperature of the intake air, the fog is recirculated from the growth chamber to the fog-generating reservoir. The chamber and reservoir are connected by a fog supply conduit and a fog return conduit which form a fog circulation circuit. The recirculation eliminates the fog density dependence on intake air humidity and stabilizes the amount of nutrients used. To monitor the fog density, this invention provides an optical fog density detector that operates by measuring the absorbance of the fog. The density detector can be coupled with the fog generator so that the rate of fog generation is responsive to the measured fog density. The detector can be coupled with an alarm to signal fog generator malfunction. This invention also provides fog concentration stabilization by using a large ballast reservoir connected to a fog-generating reservoir.

Abstract: A humidifier is provided of the type which has a water tank or reservoir for holding tap water. Common tap water frequently is "hard" due to dissolved minerals which result in the humidifier emitting a fine dust when such water is used. By affixing electroplated electrodes to the interior of the tank minerals such as calcium carbonate can precipitate on the surface of the cathodes. Temporarily reversing the polarity of the electrodes will cause the calcium carbonate to be dislodged from the electrodes and fall to the bottom of the reservoir where it can be removed.

Abstract: A cooling tower having a housing for forming droplets of hot water in an air stream which causes a small portion of the hot water issuing from said oscillating spray nozzles to evaporate and remove heat from the remaining water thereby cooling said remaining water. A sump collects the remaining water and returns the remaining water to the heat source. The low pressure fluidic oscillating nozzles: (a) form large sized droplets of hot water uniformly over a large area, (b) reduce the quantity of droplets of hot water that are less than 2 mm diameter, (c) issue a spray pattern that reduces aerodynamic interference with air flow from said air blower, and (d) reduce sediments getting into the spraying of said hot water. In a preferred embodiment, the fluidic oscillator is a cusped island oscillator having an outlet with diverging sidewalls.

Abstract: A bioreactor, in particular for a microgravity, comprising at least one cell culture chamber, an oxygen supply and an agitator for a cell culture. In particular, the chamber includes two housing elements (1, 2) having a first (1', 9) and a second (2', 9') wall region, as well as a first (3) and a second (4) separating element extending from respectively the first (1', 9) and the second (2', 9') wall regions in the direction respectively of the second (2', 9') and the first (1', 9) wall regions. The separating region or regions of the separating elements has (have) a height (h) less than the distance (D) between the first (1', 9) and the second (2', 9') wall regions. The agitator includes a first and second devices (7) for moving the two housing elements (1, 2) with respect to each other.

Abstract: A mixing apparatus is used in mixing two fluids, such as two liquids, a liquid and a solid, or a liquid and a gas, within beer fermenter, microorganism culture mediums, waste water disposal plants, and other chemical processes. It is high in efficiency and simple in maintenance and repair. In particular, this apparatus utilizes sound vibration which sends pulses through the apparatus and adds a fluid to the other fluid to be mixed. Therefore, the mixing efficiency level can be raised by using this fluid mixing apparatus.

Abstract: A liquid spraying device including an elongate first vessel closed at one of its ends by a first free face of a piezoelectric transducer capable of emitting waves into a liquid filling the vessel, and open at its end remote from the piezoelectric transducer. The piezoelectric transducer includes a second free face opposite its first free face, and wherein an elongate second vessel is disposed symmetrically to the first vessel relative to the piezoelectric transducer, the second vessel being closed at one of its ends by said second free face of the piezoelectric transducer, which is thus also capable of emitting waves into a liquid filling the second vessel, said second vessel being open at its end remote from the piezoelectric transducer.

Abstract: An electrostatic precipitator including a cylindrical tube the upper end of which is provided with a gas outlet while the lower end is provided with a gas inlet. Mounted adjacent the upper end of the tube is an ion source. Adjacent the lower end of the tube is a diaphragm which is vibrated by an ultrasonic transducer. A liquid is supported on the diaphragm and caused to vibrate in order to produce a mist. An electric potential is established between the ion source and the liquid so that carbon particles contained in the gas stream passing through the precipitator are trapped by liquid droplets which are then conveyed back to a reservoir for the liquid.

Abstract: A gas-feeding device for feeding a starting gas for deposition-film-formation by the chemical vapor deposition method, comprising a container having a space for discharging the starting gas containing an organometallic compound by introduction of a carrier gas; a gas-introducing means connected to the container for introducing a carrier gas is described. A plurality of openings for introducing the organometallic compound into the container is also provided, wherein each opening is part of an atomizer employing a piezoelectric element to eject the organometallic compound in a mist state into the container where the carrier gas passes through the space, and a container is provided for storing the organometallic compound.

Abstract: A gas-feeding device for feeding a starting gas for forming a deposited film by the chemical vapor deposition method, comprising a storage area for an organometallic compound having a high viscosity, wherein the storage area has a space for discharging a starting gas containing the organometallic compound by introducing a carrier gas into the storage area. The carrier gas is introduced into the organometallic gas via a gas-introducing member having a number of openings. An ultrasonic oscillator is provided in the storage area to generate cavitation in the organometallic compound. A deposited-film forming apparatus incorporating the gas-feeding device is also described.

Abstract: A mist generating, self-contained room air humidifier ensures substantially complete evaporation of the mist introduced to an air flow drawn from a room environment prior to discharge back into the room by preferably providing a vertical column extending upwardly from the mist generator to the humidifier outlet and having sufficient height to allow complete evaporation.

Abstract: A humidifier reduces the noise generated by the dropping of water droplets and can also vent bacteria-destroyed mist. An auxiliary water tank is installed under a water supply tank for receiving the water supplied from the water supply tank. An ultrasonic humidifying vessel is connected to the auxiliary water tank. A heating-type humidifying apparatus is provided at the upper portion of the ultrasonic humidifying vessel. A heating coil is wound around a driving pulley of the heating-type humidifying apparatus. First and second idle pulleys are immersed in the water contained in the ultrasonic humidifying vessel. A humidifying endless belt trains around the driving, the first idle, and the second idle pulleys.

Abstract: An ultra low volume fog or aerosol generator produces a fog with droplets whose particle size or sizes are easily varied from about 5 microns to about 20 microns during the operation of the machine. This generator includes an air blower, the discharge of which is directed along a prescribed path, thence, through a passageway and, thence, through a nozzle into the ambient air. Liquid supplied to the nozzle is entrained by the air as it passes through the nozzle for producing finely droplets dispersed in the air. The particle sizes of the droplets are regulated by altering the volume of air discharged through the nozzle by means of an air regulator valve, which diverts a portion of the air from its prescribed path. An electrical motor controls the opening and closing of the air regulator valve.In one embodiment, the motor cyclically modulates the opening and closing of the valve. In another embodiment, the motor is a reversible, D.C.

Abstract: A humidifier for adding liquid from a mist source to a gas flow improves the evaporation of the liquid by reducing the quantity of larger water droplets from the mist introduced to the gas flow by slowing a diverted portion of the gas flow, routing the gas flow through a partitioned chamber and deflecting the gas flow from direct impact on the mist while catching splattered liquid droplets within the humidifier.

Abstract: The vehicular humidified cool wind system includes a blower, atomizing means, a water tank and an air passage which are integrated, and is mounted on the ceiling above the driver to blow out a humidified wind downward. The air passage is divided into a humidified wind passage to be fed with atomized water and an ordinary wind to be fed with no atomized water. The air outlet has a double duct structure, an internal cylinder and external cylinder, in which the humidified wind having passed through the humidified wind passage is blown out of an internal cylinder whereas the ordinary wind having passed through the ordinary wind passage is blown out of an external cylinder around the internal cylinder. The humidified wind is prevented from diffusing while being surrounded by the ordinary wind, so that it efficiently reaches the driver to give him a cool feeling.

Abstract: The invention relates to a spraying device including a tank which is open at its upper part, capable of containing a liquid to be sprayed, such as water, while being filled up to its opening, a piozoelectric element capable of emitting waves into the liquid and fan means for creating a circulation of air in the vicinity of the surface of the liquid. The waves are focused in the vicinity of the opening of the tank, and the cross-section of the tank (1) has a progressive constriction towards the opening (2) of the tank (1).

Abstract: The liquid treating method according to the present invention introduces a bubble into liquid phase and applies vibration waves, such as ultrasonic waves, from each sides of the bubble. Collision of the vibration waves with the bubble imparts the compression pressure to the bubble. This effect is used to dissolve a gas forming the bubble into the liquid phase or to improve liquid quality of this liquid phase.

Abstract: A fogging system and fogger bar assembly are disclosed wherein a plurality of foggers are mounted on an array and operatively connected to air and primary water lines. A second water line is introduced in parallel with the primary water lines to provide an equalization of pressure in the primary water lines and dampen vibrations from the foggers. Check valves are used near the foggers to reduce the feedback of undesirable shocks and noise from the foggers into the primary water lines. A system is described wherein a plurality of pressure regulators are used to supply the same pressure to primary water lines in a system where a plurality of fogger bar assemblies are used in a vertical orientation.

Abstract: Apparatus and method for inhibiting the accumulation of bacteria within a humidifier includes a primary water path for directing water directly from a water source to a humidifier during its operation. When the humidifier is shut-down for a cleaning operation, water is directed through a bacteria-removing device before entering the humidifier. Water contact surfaces within the humidifier are preferably lined with copper to further inhibit bacterial growth.

Abstract: A humidifier that can be used on a forced air circulation system for injecting atomized liquid into the cold air portion of that forced air circulation system includes a neubilizer for atomizing water fed thereto. The humidifier can be used in conjunction with an air cooling system and includes a demineralizing filter for removing white dust before the water reaches the humidifier. The filter can take various forms and can include several elements. One form of the humidifier can be connected between a hot air plenum and a cold air plenum of the forced air circulation system whereby the pressure drop between these two plenums is used to move moisture entrained air into the cold air plenum.

Abstract: A domestic electric appliance comprises a water purifier employing an electrodialyzer. The electrodialyzer includes an anode, a cathode, cation exchange films, and anion exchange films. The cation and anion exchange films are alternately arranged between the anode and the cathode and serve as partition walls. The domestic electric appliance further comprises a unit for using the water purified by the water purifier.

Abstract: A fog generator includes a reservoir for a liquid to be atomized, a plurality of ultrasonic transducers disposed in spaced relation to each other in the reservoir so as to be submerged within the liquid therein, a gas inlet duct extending through the reservoir, and a dome-shaped deflector overlying, and of larger diameter than, the gas inlet duct to deflect the gas flowing through the duct back towards the reservor to pick up liquid atomized by the transducers.

Abstract: An ion generator capable of producing a quantity of negative electrically charged ions comprises a container for a liquid including H.sub.2 O. A stirrer or pump imparts controlled rotation to the liquid, while maintaining continuous surface tension on the liquid surface.

Abstract: In an ultrasonic wave nebulizer having a piezoelectric vibrator (1) at the bottom of a water container for exciting ultrasonic vibration of water on the water surface to convert water to mist, a flat plate (16) having a center aperture (15) is provided above the vibrator (1) with a spacing (Z) between the plate (16) and the vibrator (1), so that the aperture (15) is positioned above the center of the vibrator (1). The plate (16) has no further apertures except the center aperture (15). The diameter (D) of the aperture (15) is smaller than the diameter (A) of the vibrator (1). The presence of the aperture (15) above the vibrator (1) improves the performance of the nebulizer, and increases the generation of mist.

Abstract: The present invention provides an improved ion vapor generator device for producing a quantity of negatively charged ions from a liquid comprising water. The ion vapors generated may be utilized for the enhancement of combustion processes. By supplying ion vapors to a combustion region of a furnace or internal combustion engine, a catalytic reaction is produced that may be used to reduce fuel consumption and undesired exhaust emissions. The negative ion vapor of the invention can also be supplied to an enclosed area occupied by humans to reduce many noxious or otherwise undesirable odors and breathing irritants therein, and to provide a beneficial stimulation of the respiratory system. The ion vapor is generated by imparting controlled disturbance to the surface of a liquid. Also, an amount of the liquid is withdrawn, continuously aerated, and introduced to the vapor space above the liquid.

Abstract: An apparatus for injecting air freshener or other airborn vapor into the air of a building, mounts to the side of a manifold or other air passageway, which is part of the building air conditioning or heating system. A solid, liquid-saturated dispersant cylinder is ultimately inserted into the passageway and removed from the passageway into a substantially sealed container by means of an electric motor drive which is controlled by a microprocessor-driven control system. The programmable control system is set to introduce the solid dispersant into the air passageway at selectable times of the day and for a set duration, but may be overridden manually in the event a party is to be held, etc.

Abstract: An ultrasonic wave nebulizer has a vibrator-heater assembly unit (4) mounted at bottom of a water container (1) for converting water to mist, and heating water to provide warm mist. The assembly unit (4) has a circular piezoelectric vibrator element (9), and a ring-shaped conductive plate (7) surrounding said vibrator element (9). A heater (11) is attached on the rear surface of the conductive plate (7) so that the heater (11) is out of water. The assembly unit (4) has also a circuit element (13) for energizing the vibrator element (9). Water is heated, preferably, at less than 70.degree. C.

Abstract: Methods and devices for generating gas bubbles including a microbubble generating cell having a microporous mat permeable to gas appied thereagainst under pressure which has a ultrasonic energy generator such as a piezoelectric transducer in wave energy communication therewith for promoting flow and impeding fouling thereof. Such mat is comprised of compressed corrosion-resistant metal fibers of a diameter of between 2 and 80 microns, has a density of less than 70% of the density of the fibers and an average pore diameter of between 5 and 100 microns. Such methods and devices are associated with a vessel and/or a foil for a vessel for generating and dispensing microbubbles along the hull surfaces to reduce friction and turbulence on the wetted surface. The foil is positioned forward of vessel bowpeak with its trailing edge confronting same and has a microbubble dispenser for dispensing microbubbles in the path of the hull of the vessel.

Abstract: A habitat for raising aquatic life such as fish, monitors the temperature and the dissolved oxygen content of the water therein and introduces water from the epilimnion to increase the dissolved oxygen content and the temperature. The habitat is air powered by a low pressure air source which releases air into the habitat to move water during a cyclic operation of a ram-like member. An alternative embodiment can draw cool water from the hypolimnion to mix with warm oxygen-laden epilimnion water, and an embodiment powered by wave action in the open sea is disclosed.

Abstract: In the embodiments described in the specification, a floating aerator for the introduction of air into a body of water such as an activated sludge plant having at least one air supply line extending along the surface of the water with aerators suspended below the surface of the water, has floats mounted on the air supply line and branch air lines extending from the air supply line through each float to a suspended aerator. Each air supply line is a continuous line extending through the floats and the floats are made of two preformed interlocking, buoyant sections.

Abstract: An ultrasound flotation unit for separation of tails from liquors obtained by floating ores, wherein the unit comprises a vertically disposed cylindrical mixing chamber that forms a bubble-particle contact region within a cylindrical flotation cell that has a bubble-pulp separation region surrounding said mixing chamber; the chamber having an air feed conduit in a lower portion thereof, an ore pulp feed conduit in a higher portion above said air feeding chamber, an ultrasonic transducer disposed above an aperture in a top portion of the mixing chamber and means for subjecting said chamber to an amount of power in kilowatt-hours per metric ton through a sonic probe to focus an amount in watt/ml of ultrasonic power to the chamber to provide a residence time of slurry within the bubble-pulp separator region that is about 30 to 100 times longer than in the ultrasonic mixing chamber.