Abstract: A control valve assembly for controlling the flow of abrasive slurry from a supply pump, directing a selected amount of abrasive slurry to the lapping wheel of an associated lapping machine, and recirculating the remainder of the supply of abrasive slurry to the supply pump.

Abstract: A method of controlling the ratio between the water flow rates in the primary and secondary circuits of hot water heating systems, particularly of low-temperature hot water heating systems, by mixing flow water with return water passing through an adjustable bypass by means of a multi-way mixing device. To make maximum use of the rangeability of said mixing device and to optimize overall heating system control, the bypass water flow rate is controlled as a function of the mixing device position and the bypass is substantially closed when the way from the primary circuit flow piping to the secondary circuit flow piping is fully opened and/or an appropriate signal is given by the heating system controller.

Abstract: A three-way poppet valve for directing the flow of a fluid that will permit precise, constant thickness patterns of fluid coating upon a moving surface and cause a minimum of after-drool when the coating process is ceased. The three-way poppet valve assembly is also provided with means to rapidly change the direction of fluid flow to create rapid on/off fluid deposition cycle times and facilitate the formation of minimum length coatings on a rapidly moving surface.

Abstract: Apparatus for dispensing cold drinks comprising a cold water supply line in which cold water is flowing continuously, a valve comprising a valve body having passaging, an inlet for delivery of cold water from a first point along said supply line to the passaging, a main outlet for dispensing of cold water from the passaging, a valve member for the main outlet, and an auxiliary outlet for return of cold water from the passaging to a second point along the supply line downstream from the first point, and a Venturi in the supply line for causing a pressure differential in the cold water between the first and second points along the supply line for continuous flow of the cold water from the supply line through the passaging and the auxiliary outlet back to the supply line when the valve member is closed, thereby to assure having cold water on tap in the passaging for being dispensed when the valve member is opened.

Abstract: The temperature controlled valve mechanism herein comprises a valve housing, a valve inlet in the housing for connection with a fluid source, a valve outlet in the housing for draining fluid from the housing and a valve closure member supported for movement toward and away from the valve outlet between closed and opened positions. The valve closure member blocks and closes the valve outlet when it is in the closed position. A biasing spring is provided for urging the valve closure member away from the closed position. An expansion chamber is formed within the housing. Apparatus for introducing a pressure into the expansion chamber is provided for moving the closure member to a closed position against the force of the biasing spring upon entry of a pressurized medium into the expansion chamber. A temperature-activated venting mechanism for venting and depressurizing the expansion chamber upon occurrence of a predetermined temperature drop is provided.

Abstract: Liquid mixtures are prepared in first and second containers (3 and 4). The first container (3) has an outlet (6) spaced from the bottom of the container and communicating with an inlet (7) to the second container (4). A measured amount of first liquid is poured into the first container and fills the latter to the height (h.sub.1) of the outlet, the remainder flowing under gravity into the second container, whereby the first liquid is distributed between the first and second containers in proportions dependant upon the height (h.sub.1) of the outlet (6) and the basal areas of the two containers.A hollow tubular extension (15) is then fitted with one of its ends to said outlet and at the other end has mixture-preventing means (18) for receiving a flow of second liquid and defining an overflow outlet (16) spaced above the outlet (6).

Abstract: A mixing apparatus for multi-component plastics, in particular polyurethane, possesses a mixing chamber (2) with inlet apertures (3) and (4) for the individual plastic components and an outlet aperture (8) for the mixture. In the mixing chamber, a control element (5), which has the same cross-section as the chamber and possesses overflow channels (6) and (7), can be moved to and fro for controlling the component streams. In order to avoid pressure peaks or pressure surges in the transport of the components when the control element passes from the closed position to the mixing position and vice versa, and to provide improved accuracy of metering, the inlet apertures in the inner wall of the mixing chamber, and the corresponding areas of the shell of the control element between its end face (13) and the overflow channels, are matched with one another with regard to their size.

Abstract: A recirculating paint apparatus comprising a main body provided with a plurality of radially extending openings in communication with a main axially extending delivery channel, and a plurality of selectively operable valve assemblies for controlling communication between different color paints and the delivery channel is disclosed. Each paint is recirculated through its associated valve assembly right up to its valve for controlling flow through an orifice in communication with the common delivery channel so that all areas are subject to recirculating flow and any settling out of pigments or solids in the paint is prevented or minimized.

Abstract: The apparatus comprises a circulation circuit including, in series, a cell containing the degradable solution and a pump for circulating the solution. A second, regeneration circuit is connected to the circulation circuit by valves for injecting into the latter solution having a concentration greater than that of the circulation circuit. The regeneration circuit has a surge tank or a collector vessel for collecting degraded solution from the circulation circuit.

Abstract: A fuel supply system including a fuel supply line extending from a fuel tank to a fuel supplier for delivery of fuel to an internal combustion engine. A water separator is positioned in the fuel supply line, the water separator having a chamber in which fuel and water are separated into a low phase comprising water and an upper phase comprising fuel. The water separator chamber has a first sensor for sensing a low level of water and a second sensor for sensing a high level of water. A control circuit is responsive to the first sensor for providing a warning indication urging a driver to drain the water in the water separator chamber when the water level in the water separator chamber increases to the low level. The control circuit is responsive to the second sensor for interrupting communication between the water separator and the fuel supplier when the water level in the water separator chamber increases to the high level.

Abstract: Disclosed is a reversible refrigeration system comprising a compressor, first and second heat exchangers, an expansion valve, three three-way valves, and apparatus for connecting the elements of the system so that the system will operate in a heating mode with the three-way valves adjusted for heating operation, in a cooling mode with the three three-way valves adjusted for cooling operation and in a defrost mode with the three three-way valves adjusted for defrost operation.

Abstract: A coupler for use in an oil system for an engine which includes a first oil cooler provided adjacent the engine and a second oil cooler provided remotely from the engine. The coupler includes a housing, a first passageway in the housing for coupling an oil output port of the engine to an input oil port of the first oil cooler, a second passageway in the housing for coupling an oil output port of the first oil cooler to an oil input port of the second oil cooler and a third passageway in the housing for coupling an oil output port of the second oil cooler to an oil inport of the engine whereby the first and second oil coolers are connected in series.

Abstract: An arrangement for developing film has a developing chamber which is provided with an inlet and an outlet for the developer. The chamber is located above a first container having an open upper end and arranged to receive developer discharged through the outlet of the chamber. This container is located inside of or above a second container arranged to receive developer which overflows from the first container. The containers have respective outlets which merge into a single conduit leading to the developing chamber. A heating device surrounds the conduit or is accommodated in the first container and functions to heat the developer to a predetermined temperature required for development. A pump for circulating the developer is arranged in the conduit which leads to the developing chamber. The outlet of the second container is provided with a valve which is controlled by a thermal sensor.

Abstract: The invention relates to a control unit comprising two bodies, one of which is located in a main fluid-distributing section, such as a hot water heating system. A shunt valve in this main section body provides for shunting the hot water, of a boiler in the main section, between different channels which are enclosed within the two bodies. The second body section is located in a group flow-distributing section, and may be used in conjunction with a circulating pump. The two bodies are connected to each other via a mechanical heat-blocking device, made of a material having a heat conductivity figure which is lower than .lambda.=1.00 kcal/m h .degree.C. This heat-blocking device also establishes a communication for fluid flow between the channels, enclosed in the two bodies.

Abstract: Spray paint lines, in particular the spray sites in spray booths of auto assembly lines, are provided with the paint material by means of a pump delivering the paint material into the main ring. The pressure level required for spraying the paint is adjusted by means of a pressurized vessel and a pressurized gas above the liquid level. A second pump conveys fresh paint material into the pressurized vessel.

Abstract: A remote control apparatus for power washers includes a water line having a flow control switch device which is in series therewith. The flow control switch device includes an electrical flow responsive switch which is actuated in response to water flow through said line and is deactuated in response to the absence of such flow. A time-delay starting switch device is connected to the flow responsive switch and includes a starting switch which is actuated after a predetermined period of time in response to actuation of the flow responsive switch and is deactuated directly in response to deactuation of the flow responsive switch. The starting switch device further includes a timer for operating the starting switch which is activated in response to actuation of the flow responsive switch and is reset upon deactuation of the flow responsive switch. A relay for controlling a motor operated pump is actuated and deactuated responsive to the operation of the starting switch.

Abstract: The invention relates to a method and a device for producing a solid-forming or foam-forming flowable reaction mixture by metered injection of flowable reaction components into a mixing zone from which the finished reaction mixture is discharged.

Abstract: An improved water-level control method and apparatus automatically maintains the water level in a pool by selectively filling or draining water as required during the period that the circulating system is not operating.

Abstract: Method and apparatus for providing a controlled pressure liquid circulation system comprising a circulation conduit through which a liquid can be circulated and recirculated to accomplish a desired function, such as heating and/or cooling of a work station such as a mold. The invention involves opening and closing said circulation conduit to a source of supply liquid, such as city water, at elevated pressure while maintaining the controlled pressure of the liquid within said circulation conduit at a substantially lower pressure, and is characterized by maintaining the circulation conduit open to a drain line at all times and providing or maintaining a drain pressure which is at least slightly above atmospheric and is equal to the pressure desired within the circulation conduit in the area thereof which is open to the drain.

Abstract: An oil burner of the type of pumping up a fuel oil is disclosed which has a first oil level setting means of an airtight type having an overflow pipe means constantly immersed at the lower end thereof in a fuel oil to be pumped up to the first oil level setting means and has a second oil level setting means disposed below the first oil level setting means and directly connected to a fuel oil supply tank. A fuel oil supplied from the second oil level setting means is drawn up to the first oil level setting means by a pumping-up means and subsequently supplied through a supply pipe to a combustion means. The level of a fuel oil in the first oil level setting means is kept constant at a position above the outlet end of the supply pipe. The overflow pipe means may be movable in the vertical direction so as to vary only the supply rate of a fuel oil.

Abstract: The first and the second circulation pipe systems are respectively and circularly connected to a tray which a processing solution is supplied into, respective pumps to pump up the processing solution, respective containers which a circulated processing solution is retrieved into, and an over-flow unit to keep the level of a processing solution supplied into the tray at desired level, the over-flow unit being provided to the opening of the bottom of the tray. In the respective circulation pipe systems, valves for switching over between the systems are further provided, alternatively to circulate a desired processing solution by controlling the valves.

Abstract: A method and apparatus for producing fluidized lime is disclosed herein. The apparatus includes a storage tank for holding and storing a fluid medium. Lime particulate is mixed by an inductor unit with the fluid medium in a closed conduit to thereby eliminate the problem of air pollution. The apparatus also includes a suitable valve and conduit system for delivering the fluid medium to the inductor unit, for returning the mixture of lime particulate and fluid medium from the inductor unit to the storage tank, and for circulating the fluid medium and mixture in a manner to achieve thorough mixing.

Abstract: Exchanger means for exchanging a first fluid with a second fluid, in varying proportions and employs a first duct, carrying the first fluid, a second duct carrying the second fluid, and a transfer chamber connected to both ducts, through which some, or all of the second fluid is able to be transferred back into the first duct, and variable control means in the form of first and second damper blade means in the chamber which can be swung together, thus dividing the chamber and preventing transfer, and which may be swung apart to procure varying proportions of such transfer. The chamber also has inlet means for inlet of the first fluid and outlet means for discharge of the second fluid.

Abstract: Apparatus for aeroponic growth and development of a multiplicity of plants comprising at least one plant development unit including at least one perforate plant support member adapted to secure plants above the root portions thereof and thereby to directly expose substantially all of the root portions thereof to the atmosphere; spraying apparatus for providing a nutrient mist directly to the exposed root portions of the plants; and nutrient collection and recirculation means; and control means for determining the timing of mist provision.

Abstract: A manure agitation system directed to an open top tank for storage of manure slurry. A gate valve is located in the floor of the tank which can be opened from outside the tank to draw manure slurry from the inside of the tank through a piping system and pump assembly and flow it under pressure through the piping system to an agitator nozzle for substantially high pressure discharge and located inside the tank generally centrally of the floor of the tank and which can be rotated to different positions from outside the tank. A pair of first and second flow control valves are opened to permit the flow of the manure slurry as described and a third control valve is then in closed position.

Abstract: A compact valve and actuator includes a housing with a cylindrical bore which is open on one end of the housing and substantially closed at the second end except for an inwardly extending coaxial inlet tube. A cylindrical slide member is concentrically received between the outside of the tube and the inside of the bore and is provided with a piston-forming flange which is restricted in axial movement by a stop ring also located around the slide member midway of the bore. The second end of the bore and the stop ring form ends of a cylinder for the aforementioned piston-forming flange of the slide member. The slide member further includes valving apertures which cooperate with the stop ring to communicate fluid received via the inlet tube either to the open end of the bore, or via apertures in the stop ring to a by-pass.

Abstract: Apparatus and method for producing a slurry. The apparatus includes a slurry reservoir, a closed circuit and a pump for circulating slurry from the reservoir through the closed circuit and back to the reservoir. Means are provided for introducing both particulate and liquid materials into the closed circuit for forming the slurry. A first control circuit provides a particulate flow rate signal indicating the rate of flow of particulate material into the closed circuit. A flow meter provides a liquid flow rate signal indicative of the actual flow rate of liquid material into the closed circuit. A density measuring and control circuit measures the density of slurry flowing within the closed circuit and provides a density signal indicative of the difference between the measured density of slurry and a desired desity based upon data inputted to the density measuring and control circuit.

Abstract: A rinsing tank in a developing machine for X-ray films or the like is equipped with a circulating system which draws liquid from the bottom zone of the tank and returns the withdrawn liquid to the upper zone of the tank. The contents of the tank can be evacuated without resorting to any values by using a siphon whose intake end is connected with the suction side of a jet pump in the pipeline for circulation of liquid, the uppermost section of which is located at a level below the normal level of the upper surface of the body of liquid in the tank, and the discharge end of which is connected with a liquid removing pipe. When the pump which causes the liquid to circulate by flowing through the pipeline is arrested, the jet pump is deactivated and allows the liquid in the siphon to rise and to flow into the uppermost section. The liquid thereupon continues to leave the tank in the form of a continuous stream which flows along a second path defined by a portion of the pipeline, the jet pump and the siphon.

Abstract: This invention is concerned with a method and apparatus for the development of photographic films in a photographic film processor in which the films are developed when the exposed films pass through a developing tank containing developer. The object of said invention is to attain uniform development with a simple method, that is, to make the change of the activity of the developer during the development of the films to be treated very small from the leading end to the trailing end of the film. The said invention makes the influence of the momentarily changing activity of the developer in contact with the films as small as possible by compensating for the decrease of the activity due to the exhaustion of the developer by gradually increasing the immersion time of the films in the developer from the leading end toward the trailing end of the photographic films by gradually changing the relative level of the liquid surface when the films are fed into the developer.

Abstract: An air flow reverser apparatus for use in association with an air flow system having air supply and return port means, said apparatus comprising a main supply duct, and a main return duct, said ducts being connectable to said respective supply and return port means of said air flow system, at least two branch supply ducts communicating with said main supply duct, at least two branch return ducts communicating with said main return duct, supply damper means for selectively shutting off at least one of said branch supply ducts, while leaving at least one said branch supply duct open, return damper means for selectively shutting off at least one of said branch return ducts while leaving at least one said branch return duct open, and means interconnecting said supply and return damper means whereby when a selected one of said branch supply ducts is closed, a selected one of said branch return ducts is open, and power operated means for moving the same from one position to another simultaneously.

Abstract: In a chemical solution circulator including a tank, a pump with an intake pipe connected to the tank and a discharge pipe for delivering solution to an enclosure communicating with the tank; a chemical concentration control system for the automatic addition of liquid chemicals for maintaining a predetermined concentration thereof within the tank comprises a diverter and chemical additive pipe connected to the discharge pipe for continuously sampling the solution and outletting into the tank. An aspirator is connected into the diverter pipe and has a low pressure additive intake pipe connected to a chemical solution storage tank. A normally closed solenoid valve is interposed in the additive intake pipe. An electronic controller is connected to the valve. A flow through conductivity cell is interposed within the diverter pipe upstream of the aspirator for signaling the controller at a set value maintaining the valve closed.

Abstract: In a fluid circulation system of the type having a pump for supplying pressurized fluid to an apparatus requiring a supply of pressurized fluid, a sump containing a volume of fluid from which the pump draws its supply, and an overage fluid return line, a sump level maintenance system including a remote fluid reservoir disposed above the sump, a housing in communication with the fluid in the sump and defining a pair of ports in communication with respective ones of the reservoir and the overage return passage, a float structure operative to open both ports when the sump level is below a low level and to close the port to the reservoir to prevent replenishment when the sump level is between the low level and a high level and to close both ports when the sump level is above the high level to prevent overage fluid from returning to the sump, and a fluid conduit from the overage passage to the reservoir operative to divert overage to the reservoir when the second port is closed thereby depleting the fluid volume i

Abstract: An electrically operated device such as a duplicating machine has a recptacle for accommodating a fluid for the chemical treatment of sheet material and like objects. The receptacle may be in the form of a dip tank designed for passing sheet material therethrough. This dip tank is connected via a supply conduit to a storage tank and the supply conduit includes a pump controlled by an automatic charging and metering unit for supplying fluid to the dip tank. A drain conduit leading to the storage tank is connected to the dip tank. This drain conduit includes a solenoid valve for stopping or allowing the flow of fluid through the drain conduit.

Abstract: A valve assembly for selectively connecting either one of a pair of fuel supply tanks through supply and return lines to and from a combustion engine while isolating the other tank from communication both with the selected active tank and with the engine. The valve includes first and second chambers dedicated respectively to supply and return service. Valving elements in the chambers are operated by a selector shaft shiftable between first and second positions corresponding to the first and second tanks. The valve is advantageously ported in a manner which only requires a single supply line and a single return line to and from the engine.

Abstract: This method and apparatus comprises displacing the product to be removed from a tank by forming and permanently maintaining at the upper part of the tank, above the product, an aqueous phase filling progressively the tank as the product is removed through a drain pipe. Jets of hot water are introduced into this aqueous phase and a secondary injection is effected in said aqueous phase above the level of these jets.

Abstract: A spear head access mechanism in a liquid development system wherein a machine mounted manifold, bearing a flow-through spear head connects the developer delivery system to a storage bottle. The bottle has a self sealing closure through which the spear head is forced and is encircled in an air tight manner when the bottle is pushed into operational position. A suction tube within the bottle is entered by the spear head. Upon removal of the bottle from the machine the self sealing closure forms a liquid tight seal preventing spillage of any remaining contents.

Abstract: A check valve central metering system for delivering determinable quantities of fuel to at least one fuel injection valve or injector of a fuel injected engine. The check valve central metering system containing a bi-level pressure regulating means, a 3-way valve, a check-valve, return lines and orifice interconnecting a fuel pump to a fuel rail adapted to receive at least one injector and connected in a fuel circulating mode during times not involving fuel injection and a dead-ended configuration during times involving fuel injection.

Abstract: Apparatus useful for blending predetermined accurately measured quantities of gaseous components transferred from separate pressurized supply tanks to a gas blending system, preferably on input signals received from a computer. The gas blending system includes a mixing vessel, a pressure transducer associated with said vessel for measuring the pressure of the gases, and producing an output signal and transmitting same to the computer, a circulating pump connected in series via conduits which form a circuit, and valves; preferably a multi-component valve assembly operatively communicating the two ends of the conduits for flow of gas therethrough in providing the functions of purging gas from the system, evacuating the system of gases, admixing the gaseous components received from the pressurized supply tanks to form the gaseous blend, and producing a product output blend of the admixed gases.

Abstract: An air flow reverser apparatus for use in association with an air flow system having air supply and return port means, said apparatus comprising a main supply duct, and a main return duct, said ducts being connectable to said respective supply and return port means of said air flow system, at least two branch supply ducts communicating with said main supply duct, at least two branch return ducts communicating with said main return duct, supply damper means for selectively shutting off at least one of said branch supply ducts, while leaving at least one said branch supply duct open, return damper means for selectively shutting off at least one of said branch return ducts while leaving at least one said branch return duct open, and means interconnecting said supply and return damper means whereby when a selected one of said branch supply ducts is closed, a selected one of said branch return ducts is open, and power operated means for moving the same from one position to another simultaneously.

Abstract: A machine for mixing , metering and dispensing fluids such as polyurethane, elastomers etc., composed of a number of fluid components. A valve assembly, during a recirculation cycle, receives a component from a source and returns the component to the source. During a shot cycle, the valve assembly directs at least part of the component into a mixing chamber which receives a component from another valve assembly to mix them and form, for example, polyurethane. In one embodiment, the valve assembly has a partition which divides the component entering the assembly into at least two channels, both of which direct fluid back to the source. One of the channels also has a port communicating with the mixing chamber. Each channel has a rototable ball valve, in which the one channel ball valve is rotatable to direct a predetermined amount of fluid to the mixing chamber and to the source.

Abstract: A method of dispensing includes the steps of carbonating a beverage, storing a supply of the carbonated beverage, conducting the carbonated beverage from the supply and into a circulation loop, circulating the carbonated beverage in a predetermined direction around the loop at a predetermined rate of volumetric flow, selectively dispensing carbonated beverage from the loop at a volumetric rate of flow greater than the circulation flow rate, reversing the direction of flow of carbonated beverage in the return part of the loop during the dispensing, and conducting carbonated beverage from the supply to the dispensing outlet in both the predetermined and reverse direction while cooling both the predetermined direction and reverse direction of flows; apparatus for dispensing includes a carbonator, a storage receptacle for carbonated beverage, a carbonated beverage circulation loop conduit having a pump, a delivery line, a return line, and one or more dispensing valves; a beverage supply conduit connects the stora

Abstract: Fluid is withdrawn from plural fluid-filled tanks via respective outflow conduits leading into a common mixing conduit which includes a mixing pump, and then branches off through respective inflow conduits for return of intermixed fluid back to the individual tanks. Each inflow conduit is provided with a valve unit comprising a vessel-like housing having an inlet port and an outlet port. The flow from the inlet port to the outlet port is regulated in dependence upon the height of fluid in the respective tank. The fluid height is sensed indirectly by sensing the height or pressure of fluid in the interior of the vessel-like housing, the latter being at least partly lower than the height of fluid in the respective tank. Thus, the return of fluid into each tank is regulated to maintain a respective fluid height therein independently of the other tanks.

Abstract: A slide valve has a spool valve element that is moved unidirectionally to a sequence of three positions during its operating cycle. The valve structure and unidirectional motion of the spool provide a precompression of the fluid being handled. The valve structure also permits relief of excess downstream pressure. Preferably hydraulic liquid is used to drive, position, and reset the spool valve. The spool valve itself has a hollow body with one groove on its outside surface and a valve body with a port at one end that is always in communication with the hollow portion of the spool valve. The slide valve is especially designed for and preferably used in a liquid reaction molding system to direct a reagent between a source (e.g. reservoir) and a destination (e.g. a mixing head). When applied to such a reaction molding system each slide valve replaces three conventional ball valves and one check valve and yet provides the additional features of precompression and relief of excess pressure.

Abstract: Frying apparatus including a fry pot and a filter system operable during a cleaning cycle for dislodging food particles which cling to the fry pot and for removing food particles suspended in the cooking oil is disclosed. The filter system includes a shower apparatus which discharges jets of cooking oil along the interior side surfaces of the fry pot to dislodge food particles clinging thereto. The cooking oil is drained into a drain pan, strained through a filter and means are provided for pumping the filtered cooking oil back to the fry pot where it is discharged through the shower apparatus. Food particles are continuously separated from the cooking oil as it is conveyed from the fry pot through the filter into the drain pot. In a preferred embodiment, a control circuit is provided for automatically turning off the fry pot heaters when the cooking oil is drained during the filter cycle.

Abstract: A material metering device and method for repetitively charging consistently accurate quantity charges of a lubricant retaining and wicking material to lubricant reservoirs of dynamoelectric machine bearings. A metering head is movably supported on a base for motion toward and away from a bearing and its support while both are held in alignment with the metering head. The metering head includes a dispensing chamber which may be sealingly coupled to the bearing support structure. The chamber receives lubricant retaining material from a source with excess material returning to the source. A valving arrangement interrupts the supply of material without substantially changing either the volume or pressure of the material in the dispensing chamber. An evacuation passage material flow path from the chamber to the bearing support structure or other workpiece is established and the material is extruded from the chamber.

Abstract: A power steering system has a pump, a steering gear and pressure and return passages. The pump does not include a cover member which conventionally provides space for the storage of excess fluid. The return passage has an expansible chamber included therein which accommodates the fluid volume change within the system resulting from fluid temperature changes thus permitting hermetic sealing of the system. An aspirator can also be included within the expansible chamber to improve the inlet pressure condition at the pump.

Abstract: This method and apparatus comprises displacing the product to be removed from a tank by forming and permanently maintaining at the upper part of the tank, above the product, an aqueous phase filling progressively the tank as the product is removed through a drain pipe. Jets of hot water are introduced into this aqueous phase and a secondary injection is effected in said aqueous phase above the level of these jets.

Abstract: A centralized deicing system includes, in one embodiment, a large fixed location supply tank of deicing fluid which is heated and supplied to a plurality of terminal boxes located at several aircraft loading ramps. The system includes a recirculation loop for preheating the conduits for the deicing fluid by circulating heated deicer fluid through them before application to an aircraft. Each terminal box includes a coupler for receiving ends of a hose employed on a movable vehicle used for deicing an aircraft to also preheat the hose. In one embodiment of the invention, separate tanks of water and glycol are provided, and the terminal box includes a mixing valve which can be remotely controlled by an operator for blending the heated water and glycol in the desired proportion depending on weather conditions.

Abstract: A diverter valve apparatus for the control of fluid flow and pressure within a high-pressure fluid system, wherein the system includes a plurality of fluid devices and a related number of diverter valves, each being fitted with an internal bypass orifice in its return port, which simulates the operating pressure drop through the fluid device controlled by the respective diverter valve. The diverter valve includes a shaft gate having a porting passage located therein, so that as the gate is rotated from the ON toward the OFF position the porting passage to the outlet port is reduced.

Abstract: A fuel metering device for internal combustion engines is simple in structure, efficient in operation and capable of recirculating unused fuel. The device primarily comprises a plurality of passage elements interconnected to form the configuration of an inverted isosceles triangle having a median. The lower vertex of the triangle is connected to a fuel nozzle adjacent a venturi in an air supply passage of the engine, fuel is supplied under pressure from a pump to one upper corner of the triangle, and unused fuel is recirculated from the other upper corner to the fuel pump. The device operates in a manner equivalent to an electrical wheatstone bridge such that the fuel flow in the device tends to produce a balanced condition.