Abstract: A gas-liquid mixing process and apparatus employing two or more stacked impeller-draft tube assemblies adapted to enable effective gas ingestion into a recirculating body of liquid by vortex development to be continued upon an appreciable variation in liquid level during the course of the mixing operation.

Abstract: Located on an air outlet (3) of an air inlet chamber leading to a mixture former is a star-shaped insert (6), which provides for evening-out of the air flowing out of the air outlet (3) by means of linearly oriented air conducting surfaces (8) arranged in a ray pattern. This results in more uniform mixture formation even at varying engine speeds.

Abstract: A device for aspirating liquids which is operable from any position or orientation includes a hollow housing which communicates with a source of carrier gas and a source of gas under pressure. A nozzle is disposed within the hollow housing through which the pressurized gas is directed to produce a high speed stream of gas. An entrainment member defining an aspiration chamber for the liquid is disposed in the housing with the aspiration chamber immediately adjacent to the nozzle outlet in the housing. A multi-directional liquid flow path communicating between the housing interior and the aspiration chamber is defined by the entrainment member and the edges thereof to provide fluid communication between the aspiration chamber and any point in the housing regardless of the orientation of the device.

Abstract: The gas outlet of a pipe or other sparging device is encompassed by a cover or cap which is located between the gas outlet and the mixing impeller at the bottom of a vessel. The cap is closed at the top and has a side wall so that the gas bubbles disperse around the lower rim of the wall. The wall may be non-symmetric, such as square in cross section, so as to be at different radial positions with respect to the gas outlet. The gas bubbles, even if released in pulses are distributed spatially and in time. The lower rim is preferable serrated (as a saw tooth edge) with the teeth being of different height, thereby further spreading the distribution of the bubbles as they are dispersed. The overlap or distance between the rim and the gas outlet is such that a sufficient quantity of gas is confined around the outlet to damp pressure pulsations when the pressure of the gas at the outlet does not significantly exceed the hydrostatic pressure at the outlet into the liquid.

Abstract: A fan shaft of an evaporative cooler is horizontal and carries a driving pulley at one end. A pump spindle is vertical, carrying a driven pulley at its upper end and pump impeller at its lower end, the impeller being in a pump housing in the cooler water tank. A circular section elastomeric band drives the spindle from the fan shaft.

Abstract: A gas-liquid mixing vessel utilizes an axial flow, down-pumping impeller in a draft tube to create vortex development so as to draw gas from the overhead in a body of recirculating liquid. A surge tank is used to accommodate volume changes in the vessel, and a liquid level control feature, in which the gas phase pressures in the mixing vessel and the surge tank are adjusted, is used to maintain the liquid level in the mixing vessel at a desired level for proper vortex development.

Abstract: A mechanism for idling position adjustment of a diaphragm carburetor will be described. The carburetor includes an idling nozzle which receives a fuel/air emulsion from an emulsifying chamber under idling conditions. The emulsifying chamber receives fuel from a fuel chamber and air from an acceleration port opening into the mixing passage. Furthermore, the emulsifying chamber communicates via a flow control valve to a venting port opening into the mixing passage. The flow control valve is coupled to the shaft of the throttle valve via mechanical connection means so that the idle position of the throttle valve is varied in accordance with manual adjustments of the flow control valve. This allows to adjust the fuel/air ratios under idling conditions by means of a single adjustment member.

Abstract: A counter-current operating, gas-liquid or vapor-liquid contact tower having a plurality of randomly dumped mass and heat transfer media. The improvement comprises first means for collecting and redistributing the flow to a lower positioned mass and heat transfer media and second means for introducing gas into an upwardly positioned mass and heat transfer media. More specifically, it comprises first construction elements in the form of horizontal, elongated troughs separated by substantial widths from each other having upturned sides extending angularly outwardly, the ends of said troughs abutting a circumferential flow channel, and second construction elements directly supported by said upturned sides, said second construction elements extending upwardly of said first construction elements.

Abstract: The invention refers to an aeration installation for introducing a gas, in which a cover is arranged on a foundation, through which the gas is able to penetrate this covering through individual, delimitable sections.

Abstract: A vaporizing nozzle comprises a wall of porous material, for example sintered bronze, through which the liquid to be evaporated percolates. The liquid may be, for example, petrol. At the other side of the wall the liquid atomizes or vaporizes into a gas stream, for example an air stream. The nozzle therefore provides a simple and convenient way of vaporizing or atomizing a liquid within a gas stream in, for example, the vaporization of petrol into an air stream for use with internal combustion engines. The nozzle includes selectively closed machined portions for altering the flow characteristics of the material.

Abstract: A liquid cooling tower construction incorporates a tower fill assembly with liquid contact plates which interconnect in abutting relation by use of detachable connectors formed on the sides of the liquid contact plates.

Abstract: A multiple level distributor and method for the distribution of a downwardly flowing liquid in a gas-liquid contact column and the upward flow of a gas within the gas-liquid column and which distributor comprises a trough type distributor having a plurality of holes therein, the holes arranged in at least two different levels of height from the bottom of the trough type distributor, the number and size of the holes and the height of the holes so arranged to provide for control of the liquid turndown and the liquid flow of the downwardly flowing liquid in the gas-liquid column.

Abstract: Water control apparatus for evaporative cooling system includes a medium which is saturated with water from a water supply and water draining from the medium is directed to a pan or trough in which there is a float system and which includes orifices through which water flowing into the pan flows out of the pan. The float system includes a microswitch which controls a solenoid connected to the water supply system either directly or indirectly through a time delay relay. The relay may be variable so that the delay time may be adjusted in accordance with appropriate parameters.

Abstract: Flowing an ozone-containing gas through one passage which is either the space between an outer tube and an inner tube disposed in the outer tube or the space in the inner tube, and flowing an aqueous liquid through the passage, which the ozone-containing gas is not flowing through, provides aqueous ozone solutions of high concentration and purity provided that the inner tube possesses a number of pores with an average diameter of 2 to 4 microns.

Abstract: A diffusion fogger is packed on a road case. Fans draw air through a baffle chamber and through fan openings into a fan chamber, an air compressor above the fan chamber provides compressed air to a fog head assembly. The fog head assembly releases an oil mist fog into a fog duct. Air from the fan chamber is blown through the duct and out through a front opening, entraining and delivering the fog. Air from the fan chamber is circulated over a path that serves to cool the compressor, compressed air, and exhausts from the outlet ducts. The fog head is a removable vertical assembly of an oil sump chamber and a nozzle array chamber. The nozzles, with inlets to an air manifold draw up filtered oil from an oil manifold and spray a fine mist of oil and decompressed air into the nozzle chamber. The mist continues through the next above baffle box filled with marbles, removing large oil droplets.

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: A submersible centrifugal pump especially for aquariums includes a motor driven impeller for circulating water through the pump and a movable flow indicator visible from the exterior of the pump for visually indicating the water flow rate through the pump. The impeller is mounted on a hollow motor shaft which protrudes above the pump to provide for the passage of air down through the shaft for mixing with the water within the pump. The shaft is rotatable relative to the impeller to permit turning of a valve shutter connected thereto relative to a valve seat for controlling the water flow rate through the pump.

Abstract: The invention is directed to a membrane carburetor having an intake channel and a choke flap and throttle flap movably mounted in this channel one behind the other when viewed in the direction of flow through the channel. The choke flap is arranged in the intake channel for enriching the mixture for a cold start. The choke flap is pivoted into an out-of-service position so that the choke flap is fully opened after start and after the engine is running and has warmed. The membrane carburetor is as a rule tuned for the idle condition and for the full-load condition. However, relatively lean mixtures can form in the part-load region which can lead to a non-quiet running of the engine and possibly to engine damage. According to the invention, the throttle flap is coupled to the choke flap via a four-rod linkage for achieving a mixture enrichment in the part-load region of the engine. The choke flap is pivotable independently of the choke flap position predetermined by the linkage for the start position.

Abstract: A high volume aeration device comprises a motor and propeller tube suspended in a pond by a float. A propeller on the motor shaft and inside the propeller tube creates a generally hollow water output stream that rises out of the propeller tube. A diffuser plate is longitudinally slidable inside the hollow water output stream. The water output stream strikes the diffuser plate and locates it at an equilibrium location whereat the force of the water output stream on the diffuser plate periphery equals the weight of the diffuser plate. If the propeller cavitates, the reduced water output stream causes the diffuser plate to fall toward the propeller and redirect the water output stream to the propeller. The redirected water output stream reloads the propeller and enables the aeration device to resume full output without outside intervention after the cause of the cavitation has been eliminated.

Abstract: Generally there is provided an elastomeric diffuser membrane configured to overlie a planar base and to wrap around the edge. A plurality of lobe extensions of the membrane protrude under the base and are interconnected by a strap to secure the membrane to the base.