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: A singlet-delta oxygen generator suitable for use in a COIL-type chemical laser system is provided wherein the generator has a gaseous reactant distributor which includes (a) side, top and bottom walls to form a distribution chamber; (b) a thin distribution plate disposed vertically within one of the side walls adjacent to the falling droplet zone, the distribution plate having a plurality of holes to allow the passage of gaseous first reactant therethrough; (c) a plurality of gaseous first reactant inlet openings for allowing the influx of gaseous first reactant into the distribution chamber; and (d) a liquid drain disposed in the bottom wall. In a preferred embodiment of the invention, the gaseous reactant inlet openings are conduits which direct the influx of gaseous first reactant away from the distribution plate.

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: 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: An ultrasonic device for atomizing liquids has at least one atomization unit wherein an upward directed ultrasonic transducer is located at the bottom of the unit with the top of the unit being open. A reservoir is connected to the unit and a minimum liquid level is maintained in each unit during atomization. An electric supply is connected to the transducer and liquid is circulated from the reservoir, across each transducer, and back to the reservoir for removal of impurities.

Abstract: In a combination type humidifier having a heater and an ultrasonic vibrator, an art for preventing the ultrasonic vibrator from being thermally damaged due to a heat produced by the heater is disclosed. First, a current humidity of a space, a water temperature of a humidifying chamber and a target humidity set by a user are detected. When the current humidity is higher than the target humidity, a fan motor begins to operate for a rapid heat loss. Otherwise, when the target humidity is higher than the current humidity, an error message concerning the setting of the target humidity is displayed and the fan motor is driven for a predetermined time. The heater is controlled so that the water temperature of the humidifying chamber is kept below the limit temperature by using a result of comparing the water temperature of the humidifying chamber with a limit temperature that is set for protecting the ultrasonic vibrator while the ultrasonic vibrator and the heater are simultaneously operated by a user's selection.

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 humidifier, especially for room humidification, has a reservoir for water to be dispersed into the atmosphere, a unit for dispersing the water and a passage between the reservoir and that unit which is provided with a UV radiation generator for sterilizing water before it reaches the unit. The unit can be a heater, an ultrasonic atomizer for the water or a wettable surface over which air is passed.

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: A machine and method for separating aerosol particles in a cylindrical ultrasonic member in which the particles are agglomerated in the presence of an injected allgomeration initiator, and retaining the agglomerated particles in a filter.

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 method for forming a web (N) that is permeable to liquids and designed to separate two environments and to allow the liquid to flow in one direction from one of said environments to the other. The web is caused to pass between two contra-rotating cylinders (5, 7) that are pressed against each other, one of said cylinders (7) having a surface provided with projections which cause perforations in said web (N). The cylinder (7) with the projections is turned at a peripheral speed greater than the peripheral speed of the other cylinder (5), with a consequent relative slipping action between the surfaces of the two cylinders (5, 7).

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: 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: 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 device for humidifying and ionizing air includes a first chamber for humidifying the air, a second chamber, which is separate from the first chamber, for ionizing the air, and means for aspirating and expelling the air through the two chambers, keeping the streams of ionized air and of water vapor separate.

Abstract: A hand-held inhalation responsive nebuliser by which a nebulised air stream is created for quick and efficient delivery of a fluid medication to the respiratory tract of a patient through the deep lung. The nebuliser includes a normally open electrical switch and a rotatable trigger ring extending laterally across an air flow path through which a supply of non-medicated ambient air is drawn during inhalation by the patient. The ambient air supply drawn through the nebuliser causes the trigger ring to rotate into contact with and close the electrical switch, whereby a piezoelectric disk is energized to vibrate an emitter mesh. A metered volume of fluid medication delivered to the emitter mesh from a pre-filled medication cartridge is accelerated and pulled through the mesh as a fine mist of fluid droplets to form a nebulised medication plume. The nebulised medication plume is mixed in the mouthpiece of the nebuliser with the supply of non-medicated ambient air to create the nebulised air stream.

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: The uniform droplet injector assembly is a rigid, low mass injector having a plurality of nozzles therein attached to a manifold. The manifold vibrates by piezoelectric actuators and springs in combination. The droplet injector array allows the process stream to flow through the injector assembly with the droplets uniformly dispersed into this stream. The moving parts such as the injector assembly, springs, and actuators are structurally resonant at a frequency near the droplet formation frequency. The colinear, spring/actuator configuration minimizes internal stresses due to manufacturing tolerances, preloading requirements, temperature changes, and cyclic operation in a large area generator. The linear spring/actuator configuration has low stiffness in the vibration direction and high stiffness in transverse direction to eliminate motions which would cause nonuniformly sized droplets.

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: The components of an electric warm-air humidifier are enclosed in a housing resting on a base having a water supply compartment. The housing includes an evaporation chamber in the shape of an inverted cup which has a steam outlet in its top and contains an electric heating element positioned a short distance above its open end. The evaporation chamber and the heating element are immersed in water contained in the water supply compartment. The neck of an inverted, removable, water container filled with water is placed into the water supply compartment and water fills the water supply compartment until its level reaches the lower rim of the water container's neck. The housing and the water container are displaceable from the base so as to provide access to the water supply compartment and the heating element to facilitate cleaning.

Abstract: A system for humidifying air while generating a tornado-like air flow pattern highlighted by water aerosol is described. The system includes air flow devices which generate a circular tornado-like air flow, a water aerosol generator, and a means of injecting the water aerosol into the circular air pattern to produce a visible tornado. Air is blown parallel to and within two opposing parabolic plates, creating a circular flow pattern. Air is exhausted out the top of the device at the center point between the plates, creating an updraft. Water aerosol wafts into the bottom of the circular air flow, gets caught in the upwardly spinning air flow, and exits through the top of the device. A model of a tornado is created and maintained. Also, the water aerosol humidifies the air in the room as it exits the device.

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: A steam generator for the humidifier of an air conditioning system, especially an aircraft air conditioner system, is connected by a duct to a dilution cone located inside an air flow duct (4) of the humidifier. A container (21) has an opening (22) for enabling an exiting of the steam developed inside said container (21). The opening (22) is connected to the humidifier duct (4). An opening (23) for the filling with water, is connected to the outlet of a feed valve (48), the intake opening of which may be connected to a source for the supply of water. Inside the container (21), an electric resistor (30) is completely immersed in the water. A regulating unit (60) receives signals delivered by a hygrometer (9) and that governs the intensity of current passing through the resistor (30). The regulating unit (60) causing the intensity of the current in resistance (30) to be dependent on the value of the signals delivered by the hygrometer (9).

Abstract: Dispensing apparatus comprises a housing defining a chamber receiving liquid to be dispensed and comprising a perforate membrane which defines a front wall of the chamber. A vibrating means is connected to the housing and is operable to vibrate the perforate membrane to dispense droplets of liquid through holes in the perforate membrane. The membrane defines an array of holes each of which is flared such that the cross-section narrows in a direction from the rear surface of the membrane in contact with the liquid towards the front surface of the membrane. The apparatus is suitable for dispensing pharmaceutical products as an atomized mist and provides a hand-held inhaler for oral inhalation.

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: 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: An improved aerosol chamber for an ultrasonic nebulizer which prevents relatively large medicament droplets from being inhaled by a patient. The chamber has a housing formed from a polycarbonate resin and is generally cylindrically shaped with a spherical top surface. The chamber includes an air inlet formed in the top surface and an aerosol outlet formed in a side surface. A centrally located mist tube extends coaxial from the air intake downwardly past the aerosol outlet. A longitudinally extending slot is formed in the mist tube facing the side surface of the housing diametrically opposite the outlet. The slot extends from a lower edge of the tube upwardly toward the air intake. A geyser baffle is disposed at an angle within the mist tube above the slot to deflect larger droplets away from the slot. The baffle includes an upper edge spaced from an adjacent inner surface of the mist tube to define a relatively small gap to allow inlet air to flow through the mist tube.

Abstract: This invention discloses an atomizer for hairdressing which generates micro-size liquid particles by means of electricity-mechanical power conversion elements as a source of ultrasonic wave. The atomizer for hairdressing of this invention intakes air and forcibly send it into a path made of an elastic member. Then it generates minute-diameter liquid particles from the surface of a stored liquid by means of the vibration of the electricity-mechanical power conversion means. Those liquid particles are heated and inducted into the above-mentioned path. The micro-size liquid particles having a diameter of several .mu.m or less generated by the ultrasonic vibration can be controlled at a predetermined temperature. Moreover, the particles can be blown out independently or with hot or cool air.

Abstract: Dispensing apparatus (1) comprises a housing (2) defining a chamber (3) receiving liquid (4) to be dispensed and comprising a perforate membrane which defines a front wall of the chamber. A vibrating device (8) is connected to the housing and is operable to vibrate the perforate membrane to dispense droplets of liquid through holes (25) in the perforate membrane. The housing comprises an annular member (11) having a relatively thin inner annular portion (68) connected to the perforate membrane and a relatively thick outer annular portion (66) connected to the vibrating device. The apparatus is suitable for dispensing pharmaceutical products as an atomized mist and provides a hand-held inhaler for oral inhalation.

Abstract: A method and apparatus for conducting chemical reactions in polyphase systems by using emulsifying means for the liquid components consisting of ultrasound emitters or turbines, in the absence or presence of a solid catalyst in fixed bed form with which the emulsified liquid components are brought into immediate contact by continuous circulation.

Abstract: A flotation machine comprises a cylindrical chamber having a tapered bottom to which there are secured a pipe for feeding a flotation pulp containing mineral particles of fine fraction, and a pipe for discharging gangue. Secured at the walls of the chamber is a trough for collecting froth concentrate and a group of pulp aerators, whereas arranged axially inside the chamber is a group of tapered shells spaced equidistantly heightwise of the chamber, bases of larger diameter of these shells facing the top part of the chamber and resting in one tapered surface, and one more group of tapered shells arranged at the top part of the chamber outside the shells of the first group, bases of smaller diameter of the shells facing the bottom and resting in one tapered surface outside the tapered shells of this group. Overlying the chamber is a means for feeding mineral particles of coarse fraction.

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.

Abstract: An aircraft air conditioning system circulates hot air to a humidifier having an atomized or vaporized water generator (2, 35). The exit of the water generator is located at the apex of a conical surface (20, 27, 42) which diverges in the direction of air circulation. The conical surface is pierced by holes (21) through which the hot air passes while encountering and mixing with the water particles or the water vapor mixes them there and carries them along. The conical surface is a surface of revolution (27) opening downstream. The apex of the conical surface is practically in the form of a spherical cap. The center of the apex is pierced by an outlet passage of the generator (2, 35).

Abstract: An ultrasonic fluid processing method is provided for cavitation and processing a first fluid with a second fluid in a sonication or cavitation zone. The method is useful for preparation of emulsions for chemical and pharmaceutical applications, to gasify liquids for purification, for chemical reactions, to accelerate chemical and physical reactions, and to suspend fine particles. The method includes the steps of, forming a vibration element having an axis and with an adjacent sonication or cavitation zone, enclosing the element and zone in a sealed cavity having a first fluid passage, forming a second fluid passage coaxially with the vibration element and disposed adjacent to the sonication zone, and forming a third fluid passage coaxially with the vibration element and disposed adjacent to the sonication zone. With this method, problems with the control of proportions and amounts and uniformity of parts of fluids being mixed or processed are avoided.

Abstract: The present invention relates to a fragrant air supplying method, supplying apparatus, and a building having a fragrant air supplying system for supplying fragrant air to the rooms. A fragrant-material supplying means supplies fragrant material to a mist-generating means to generate mist either by blowing air or by vibration produced by an ultrasonic-oscillating means. The mist is blown to a surface portion formed at the end of a fragrant-air separating means which separates evaporated fragrant air from mist. The fragrant air is then introduced into holes formed in a fragrant-air discharging means, in which the place of holes are offset from the surface portion toward the downstream of the fragrant air. The fragrant air is then blown into a distributing passage from the fragrant-air discharging means to mix the fragrant air with conditioned-air supplied by an air-supplying means.

Abstract: An ultrasonic fluid processing system is provided for cavitation and processing a first fluid with a second fluid in a sonication or cavitation zone. The system, in a preferred embodiment, includes a converter with a power supply, a vibration means connected to the converter and defining at least in part a sonication or cavitation zone and a cell having walls forming a cavity. The cell also has a first inlet means with an inlet opening for providing a first fluid to the cavitaito zone. The cell also has a second inlet means with an inlet opening for simultaneously providing a second fluid to the cavitation zone. The cell has an outlet opening for exit of fluid after processing and cavitation.

Abstract: A method for supplying aromas to a space includes the steps of retaining a plurality of aromatic materials in respective reservoirs, selecting at least one of the aromatic materials according to a predetermined timetable determined on the basis of activities of people in the space at each time, diffusing a predetermined amount of the selected aromatic material in air to obtain aromatized air, and sending the aromatized air into the space. The apparatus for supplying aromas includes a receptor having plural aromas, a controller for controlling the receptor to select one stated aroma from the plural aromas in the receptor according to an influence on people by the stated aroma at a stated time in a day, and a ventilator for supplying an air containing the stated aroma. A facility provided with an apparatus for supplying aromas includes plural zones with each being provided with the apparatus, and plural routes for connecting the zones to each other.

Abstract: Disclosed is an apparatus for treating moisture-depleted hair with water vapor. The apparatus is constructed so as to be very convenient to the user in treating his or her hair. It includes a first base section which can be a table top unit or a wall mounted unit, and a flexible and collapsible hose portion which is connected to the base section and adapted to be maneuverable by the subject so as to be positionable in an infinite array of directions. The base section includes a removable water reservoir chamber and a housing which includes a vapor generation section as well as an airflow section. A fan is provided in order to entrain water vapor which may be produced by way of either an ultrasonic vibrator or heating coils, and force them out through the flexible hose and onto the subject's head. A variety of interchangeable nozzles are adapted for use on the end of the flexible hose, and are configured in a variety of shapes so as to provide the user with great flexibility in their hair care method.

Abstract: The present invention pertains to an ultrasonic fragrance generation apparatus for buildings, vehicles, aircraft, and the like, as well as for open areas. In particular it pertains to an ultrasonic fragrance generation apparatus by which means a suitable fragrance may be dispersed into the ambient air at a suitable time in the optimum concentration. By employing a material having increased surface area on the ultrasonic vibrating surface, it is possible with the present invention to generate a fragrant mist at an increased rate.

Abstract: An ultrasonic humidifier system which is mounted to an air duct of a heating system. A vibrator excites water within a reservoir so as to create a fog within a fog chamber. A panel directs air flow from an upstream furnace into the fog chamber for interaction of the air flow with the fog. This interaction increases the moisture content of the air flow so as to increase the humidity level thereof. Reed switches are provided to preclude vibration if the level within the reservoir is low and/or if no air stream is delivered from the furnace.

Abstract: An ultrasonic nebulizer includes a supply container for the liquid to be nebulized, and an electrolytic cell having electrodes for generating a gas according to the amount of electricity conducted through the electrodes. The generated gas is effective to control the pressure in, or volume of, the supply container, and thereby the feed of the liquid therefrom to the ultrasonic nebulizer nozzle.

Abstract: An ultrasonic humidifier having a pair of water tanks which release their water into a reservoir in a staggered sequence. The staggered emptying of the water tanks enables the tanks to be refilled in a more efficient manner. Several different embodiments are disclosed.

Abstract: A fog producing apparatus for suspending fine particles of water in air in an economical and reliable manner. Ultrasonic transducers potted in an electrically insulative and liquidproof material are placed in a container in which a predetermined water level is maintained by a float and valve device. Alternatively, the potted transducers are suspended below floats floating on the surface of the water whereby the critical water depth over the transducers is automatically maintained. In addition compressed air is conducted through the emanating fog plumes to provide a more homogeneous and dispersed fog effect. A copious amount of fog can thereby be efficiently and reliably produced to create theatrical or visual effects.