Abstract: A fuel-fired burner of the gas-fired fully premixed type comprises a plenum chamber 2 formed by walls 5, 7, 8, 9, 10 and 11, the wall 11 having an inlet port 4 to enable the plenum chamber 2 to receive a mixture of gas and air from a mixing chamber 3 and the wall 5 comprising a plate having therein several through-going rectangular slots 6 which communicate with the chamber 2. The mixing chamber 3 has an inlet end 15 for connection to a source of pressurized air and a further inlet opening 17 in a wall 13 formed with a stub pipe 18 by means of which the chamber 3 can be connected to a source of fuel gas.

Abstract: A firefighting installation for floating roof hydrocarbon storage tanks comprises a series of vertical pipes disposed regularly around the tank. A sprayer at the top of each pipe is adapted to form a flat jet of extinguishing foam directed towards the interior of the tank along its inside wall. A pressurized water supply is connected to the pipes through an emulsifying agent feed system. An air injector on each pipe near the sprayer favors the formation of the foam. Each sprayer includes two nozzles set at an angle to each other and directed towards the floating roof. Each nozzle incorporates a longitudinal slot in its end portion opposite the free end and facing towards the floating roof.

Abstract: Air knife designed to be used in coating machines or equivalent to finish and smooth the coating by blowing air onto it, e.g. to remove excess coating material, said air knife comprising a main channel into which the air is blown in the axial direction of the channel at least from one direction, the main channel being so constructed that there are two air jets flowing in opposite directions and having equal and constant velocities over the whole length. Thus the air jets discharged from slits next to a partition between the two main channel sections, after being merged, flow in a direction perpendicular to the slit and the air flow is evenly distributed over the whole length of the slit. By using a construction in which the partition is movable, the location of the point at which the two jets mix can be varied, thus allowing the turbulence of the air jet blown at the web to be controlled and, consequently, an influence to be exerted on the properties of the coating surface.

Abstract: A gas feeding nozzle feeds at least one kind of gas to form a thin film on a substrate by a normal pressure vapor deposition process. The nozzle is constituted by a plurality of plate-like bodies. A single or a plurality of slit-like gas discharging apertures are formed by stacking spacers each having at least one cut portion in the gas-discharging direction and partition plates for separating a stream of gas from another stream of gas adjacently flowing. A gas supplying plate with at least one gas supplying opening and at least one groove for flowing the gas in its width direction is attached on at least one of the outermost plate-like bodies.

Abstract: A nozzle for spraying rust proofing material onto automobile panels including an elongate inner tube having an inlet end and axially spaced radially extending slots positioned to provide portions of the slots entirely encircling the tube.

Abstract: An air nozzle for blowing water off a vehicle moving through a car wash comprises a unit nozzle housing of molded plastic material having opposed front and rear walls and a side wall, with the front and rear walls terminating in opposed concave converging sides defining a lateral nozzle having a series of elongated throated orifices. The walls and sides define an elongated air chamber communicating with the orifices. An air inlet at one end of the housing is a part thereof and is adapted to receive a flexible hose connected to a pressurized air source. The front and rear walls have molded therein spaced mount plates or pads adapted for connection to a support arm and to a sensor respectively. A plurality of spaced threaded insert fasteners are molded, interlocked and enclosed selectively within one of the front and rear walls and the corresponding mount pads. The method of making a unit nozzle housing of molded plastic material is also disclosed.

Abstract: A header assembly comprises a plurality of substantially V-shaped, slotted troughs disposed in a substantially parallel relationship and interconnected perpendicularly to a manifold. Each trough comprises two substantially parallel, rigid side walls, two rigid end plates and two oblique walls which converge and attach to define an apex of the V-shaped trough. A plurality of alternating spacing elements and slots extends longitudinally along the length of the trough and equidistantly and obliquely along both oblique walls at the apex of the trough. Each trough contains a fiberglass-woven cord extending along the length of the trough and is disposed above the spacing elements and slots and in contact with both oblique walls.

Abstract: A device for cleaning or chemically treating workpieces, particularly printed circuit boards with solutions applied to the workpieces by nozzles comprises a two-part housing, the lower portion of which is supplied with a treatment solution and is communicated with the upper part which is subdivided into two chambers by a separating wall. Each chamber is limited from the upper wall of the housing by a flat perforated wall through which the solution flows to the nozzles formed by elongated slots.

Abstract: A flat spray nozzle for a powder spray gun comprises a nozzle body formed with an axial powder flow passageway, a pair of spaced powder discharge slots intersecting the powder flow passageway and a bore located between the powder discharge slots. The bore in the nozzle body receives an electrode which extends forwardly of the spray nozzle, between the powder discharge slots for electrostatically charging particulate powder material emitted from the powder discharge slots without disrupting the spray pattern of particulate powder material.

Abstract: A gas distribution system provides a gas to a chamber comprising a feed tube, having a tube-like configuration with an input and an output. The gas supplied to the input escapes via the output, the output being configured to have a first and second slot opening. The first slot opening has a predetermined first length along the length of the feed tube and has a predetermined first width across the length of the feed tube, and the second slot opening has a predetermined second length along the length of the feed tube and has a predetermined second width across the length of the feed tube. The second slot is contiguous with and abuts the first slot, and further the predetermined second width is smaller than the predetermined first width. The first and second slot configuration provides the gas at the output at a predetermined pressure, the predetermined pressure being reduced from an area near the output.

Abstract: An electrostatic spray device for coating powder has a powder channel, the downstream end of which has a spray opening for the spraying of the coating powder. At least one gas channel with at least one gas outlet opening is arranged substantially in the radial center of the powder channel upstream of its spray opening, the gas outlet discharging axially in the direction toward the spray opening. At least one electrode, around which gas from the gas channel flows, is located in the gas outlet opening, the downstream electrode end of the electrode terminating substantially at the downstream end thereof. Within the powder channel, directly in front of its spray opening, a funnel-shaped powder channel section is provided for compacting the powder concentration. The gas stream injects electric charges into this section, which the stream of gas has taken up from the electrode. The spray opening preferably has the shape of a slot.

Abstract: A gun head constituting the front section of an electrostatic powder painting gun makes the pattern of powder flow spouted out therefrom into the form of a flat fan-like shape to decrease the velocity of the powder flow traveling toward a workpiece to be painted to thereby enhance the efficiency of adhesion of the powder paint to the workpiece. A spout section of an end wall of a cylindrical body constituting a fundamental section of the gun head has a pair of opposed slits bored therein such that the spacing between these slits decreases progressively as approaching the outer ends thereof, and the inner ends of these slits communicate with a powder path formed inside the cylindrical body at opposed spots close to the inner surface of the powder path.

Abstract: A blowing nozzle for a highly pressurized gaseous fluid comprising at least two narrow slot-form exhaust passages (12) having a width (d) insignificantly larger than the size of polluting particles occurring in said fluid and a length (L) no more than ten times the average width (d) of each slot, the exhaust passages extending in parallel or radially over the end surface of the nozzle in a projection perpendicular to its longitudinal axis.

Abstract: A cast air nozzle is adapted to be mounted on the bottom of a combustor, particularly a fluidized-bed combustor. The air nozzle comprises a substantially gun-shaped body having a substantially horizontal upper part with a front portion and a rear portion, and a substantially vertical lower part with a through, substantially vertical inlet duct, two substantially horizontal outlet ducts in the upper part extending from the upper end of the inlet duct and opening at the front end of the front portion. The outlet ducts diverge towards the front end of the front portion, whereby an air current flowing through the air nozzle is caused to leave the nozzle in the form of horizontal diverging air jets. The upper part has at the front portion a horizontal planar upper surface and at the rear portion a backwardly-downwardly inclined upper surface, said surfaces forming an angle with each other, whereby the material in the combustor, which is conveyed across the air nozzle, does not collect on the upper portion.

Abstract: A gas nozzle for a dryer apparatus for use with moving webs includes a planar pressure plate with an upstream end portion and a downstream terminus portion and a gas discharge nozzle disposed at the upstream portion of the pressure plate to define a slot for gas flow parallel to the pressure plate. The nozzle includes a first jet forming plate which engages the upstream end portion of the pressure plate and at obtuse angle and which includes a vortex forming step. The nozzle also includes a second jet forming plate located a distance from the first jet forming plate. The two jet forming plates and the step define a passageway for gas flow parallel to the pressure plate.

Abstract: A checkvalve is provided for dispersing a fluid into a flowing stream. All operating parts of the checkvalve are located in the flowing stream to provide uniform and rapid dispersion of the fluid.

Abstract: A laminar flow cooling system employs a laminar flow nozzle comprising a pair of plate members defining slit through which cooling water flows to form a cooling water screen. One of the plate members of the laminar nozzle is deformable at least in a direction perpendicular to the cooling water flow direction to adjust the path area in the nozzle. At least one of the plate member is preferably responsive to the cooling water pressure to cause variation of the path area for adjusting the cooling water path area.

Abstract: A spray-shower pipe is equipped with flat fan nozzles having a dome-shaped indentation directed to the pipe inside and located inside a nozzle base formed with a recess that conforms with and engages the outer surface of the pipe wall and an annular extension of length corresponding to the pipe wall thickness at the circumference of the opening in which the extension is snugly seated. The front surface of the extension facing the inside of the pipe has a curvature which corresponds to the curvature of the pipe wall inside surface. The dome-shaped indentation is formed with an aperture that forms an angle with the longitudinal axis of the pipe that is slightly less than 90.degree., typically 83.degree..

Abstract: A railroad switch, snow deflecting apparatus is described in which air is fed through conduits to primary nozzles for directing air along the rails and towards the switch points to a position adjacent the apex of the switch. Secondary nozzles are spaced from the primary nozzles and behind the switch points so as to direct air along and between movable rails of the railway switch, and in the same direction as air from the primary nozzles to maintain the railway switch operationally free of snow.

Abstract: An adhesive dispensing apparatus for applying continuous, parallel adhesive beads onto the center portion of a substrate and intermittent, parallel adhesive beads on the outer portions of a substrate, particularly the plastic backing sheet of a disposable diaper. The apparatus includes a slot nozzle, divided into two center sections and two end sections, which is formed with flow passageways for each section having a coat hanger profile including a plurality of spaced, discharge orifices to form the parallel beads. A valving arrangement including solenoid-operated center dispensing valves for each center section of the nozzle, and solenoid-operated dispensing and recirculation valve pairs for each end section of the nozzle, controls the flow of adhesive to the nozzle.

Abstract: The invention relates to a gas lighter with a flat flame widened in its median part, of the type comprising a burner (22) having two gas exit nozzles (23, 24) with diverging axes. According to the invention, said nozzles have a shape or are disposed such that, at their lower parts, they terminate at a tangent to an adjacent surface of the burner or body of the lighter, licked by the gas flow they emit.

Abstract: Heat treating apparatus in which a diffuser mounted beneath a bed of sand in a heating chamber passes gas through the sand to fluidize it. In one form of the invention, the gas rises through slits coined in a metal plate that supports the sand. In another embodiment of the invention, the gas rises through ceramic fiber mesh which uniformly fluidizes the sand.

Abstract: An apparatus is described for forming cracked ice by producing a layer of ice on the inner wall of a cylindrical chamber, heating the chamber to loosen the ice, forcing the ice cylinder upwardly past a breaker which is stationary and allowing the ice to accummulate in a hopper. A ring-shaped conveyor provided with circumferentially-spaced paddles is driven by means of a motor mounted on one side of the hopper to carry pieces of cracked ice toward an outlet in the hopper.

Abstract: An airless spray coating nozzle having at least two orifices formed by the interpenetration of a plurality of grooves through a nozzle tip. The pressurized side or backside of the nozzle tip includes a single groove, and the unpressurized side of the tip includes two parallel grooves. Each parallel groove interpenetrates the backside groove, thereby forming orifices through the tip. The nozzle tip is used to spray a wide, flat spray pattern of coating material having an even distribution of coating material across the spray pattern even when the coating material is applied at a high flow rate.

Abstract: At least two exhaust holes are formed in an atomizing nozzle of an apparatus for spraying an air-water mist for cooling which is used in continuous metal casting. The respective spraying mist streams from the exhaust holes cross each other before they reach the surface of a cast strand and are diffused forwardly due to the influence of the kinetic energy which is directed in the spraying direction after they crossed, so that they sufficiently enter the region between the surfaces of guide rollers and cast strand, thereby directly spraying the air-water mist over almost the entire region of the surface of the cast strand. In addition, a header is disposed in parallel to the guide rollers and a plurality of water branching pipes are attached in line to the header in the longitudinal direction thereof. The inner diameter of these water branching pipes are set to be sequentially smaller toward the lower stage.

Abstract: A method and apparatus rapidly cools hot material of any shape without inducing distortion-causing temperature gradients between thick and thin sections. Water spray guns mounted on an enclosure surrounding the hot material launch drops of water towards the surface with sufficient speed to penetrate the vapor leaving the surface, but with insufficient flow rate to form a blanket of water thereon, to establish a turbulent mixture of water drops and vapor in equilibrium at the water boiling point temperature of 212.degree. F. Turbulent heat transfer to the vapor and evaporation of drops maintain the surfaces of the enclosure and the hot material at 212.degree. F. to cool the inner core of the hot material to 212.degree. F. by conducting heat to its surface. Irregularly shaped objects are cooled by setting each gun water spray rate to be proportional to the thickness of material where its jet strikes or by directing air at thinner locations to minimize temperature gradients within the material.

Abstract: A burner distributor tip for projecting a fuel-oxygen mixture from a premix-type gaseous fuel burning system to a refractory furnace surface is disclosed.

Abstract: This disclosure is directed to an oxy-hydrogen torch (10) comprised of a plate (16) captured between first and second outer members (12 and 14). Each outer member has a plenum (18) which open towards, and is separated by, the plate (16). The plate (16) has a plurality of groups (29, 30, 31) of spaced grooves (32--32) in one major surface (34). The groups of grooves (32--32) are arranged in an interleaved relationship with groups (29', 30', 31') of spaced grooves (36--36) on the opposite surface (38). The grooves (32 and 36) extend from one surface 46 of the plate (16) to the respective plenums (18--18) in the outer members (12 and 14). Each of the grooves (32 and 36) in a group are radially directed at a different point. Oxygen is directed into one plenum (18) and hydrogen urged into the other plenum. The gases pass through the respective grooves (32 and 36) to the surface (46) of the torch (10) for mixing and ignition.

Abstract: A variable output nozzle for permitting the output of air or gas from the nozzle to be varied. The variable output nozzle includes a nozzle housing having a bore located therein, a spherical ball located within the bore for reciprocal movement within the bore and an aperture in the nozzle housing for supplying pressurized air or gas to the bore in the nozzle housing. A plurality of slots are also located in the nozzle housing and extend into the upper portion of the bore and the bottoms of at least some of these slots are located at different depths so that the volume of pressurized air or gas exiting the nozzle will vary as the spherical ball passes the bottoms of the slots. The variable output nozzle is particularly useful as a pneumatic pressure transducer nozzle.

Abstract: A steam distributor for applying steam to a paper sheet moving beneath it and spaced from the distributor. The distributor has a leading edge and a trailing edge relative to the sheet movement. There is a header for steam extending along the leading edge. At least one opening formed in the header enables steam to be directed towards the sheet. The steam so directed forms a curtain to eliminate air entrained by the sheet.

Abstract: A gas black burner is described which is used normally in connection with a rotating cooling roller as a deposition surface, so that its discharge openings for the operating gas containing the raw material for the carbon black are directed against the cooled deposition surface. The burner is characterized by the fact that it is formed as a pipe shaped chamber provided with at least one supply line and disposed in parallel relationship to the deposition surface, which chamber has slit shaped discharge openings in its jacket.The invention relates to a gas black burner with openings to be directed against a cooled deposition surface.

Abstract: The present invention discloses a particle generating system which is capable of breaking up agglomerations of particles and producing a cloud of uniform, submicron-sized particles at high pressure and high flow rates. This is achieved by utilizing a tubular structure 11 which has injection microslits 12 on its periphery to accept and disperse the desired particle feed 16. By supplying a carrying fluid 19 at a pressure, P.sub.in, of approximately twice the ambient pressure of the velocimeter's settling chamber 20, P.sub.sc, the microslits 12 will operate at choked flow conditions. The shearing action of this choked flow is sufficient to overcome interparticle bonding forces, thereby breaking up the agglomerates of the particle feed 16 into individual particles.

Abstract: A steam distribution apparatus has a first header having an inlet for steam and a plurality of discrete outlets for steam arranged along the header. The outlets increase in size with distance from the inlet. A first chamber surrounds the first header to receive steam from the outlets in the first header. There are first, relatively large outlets in the first chamber. The relative positions of the first header and the first chamber ensure that steam leaving the plurality of outlets in the first header impinges on the interior of the chamber and must travel around the chamber to reach the first outlets in the first chamber. A second chamber communicates with the first outlets from the first chamber. There are outlets in the second chamber. A shrouding is positionable above a paper web and communicates with the elongate outlets in said second chamber. The apparatus permits uniform steam flow along the entire length of the distributor.

Abstract: A spraying system for cryogenic liquid, e.g. a liquefied gas, provides a distribution duct formed with a plurality of slit-shaped spraying orifices. Preferably a phase separator is provided upstream of the orifices and the orifices are close to the liquid compartment of the phase separator.

Abstract: A plurality of arcuate, secondary (fuel) nozzle members are juxtaposed, so that respective two of them define between them a curved, primary slit nozzle, producing a primary (oxidizer) expansion flow while the two flows mix downstream, predominantly transversely to the expansion. The nozzle members are mounted in the aperture of a plate; large-scale assemblies are described.

Abstract: A method and apparatus for randomly applying a foam composition containing a coloring agent dispersed therein onto a textile fabric is disclosed. The coloring agent is mixed into the foam in a non-homogeneous manner and randomly applied onto a fabric in a system having random application means for delivering the foam-coloring agent composition to a depositing means which is rotated and moved transverse to the direction of travel of the fabric being treated. The foam-coloring agent composition is caused to flow axially and in one embodiment over the edges of a baffle means in a random manner onto the textile fabric being treated so as to impart a random application of the coloring agent thereon.

Abstract: The present invention relates to a burner for combustion apparatus employing a so-called multistage atomization system in which a tip of a nozzle is blocked, an outer peripheral surface has an inclined portion formed therein, fuel is forced in a string-like pattern through a multiplicity of outflow passageways formed on the inclined portion while at the same time the flow of air is substantially brought to intersect thereto at right angles for atomized disintegration and the fuel flowing along the inclined portion is formed into substances in the form of film and subject to filmed disintegration at the top of a frustoconical portion.

Abstract: An air nozzle for a jet drier has a nozzle slot extending transverse to a moving material web during use and has an elongated nozzle lip which together with the material web forms the boundary of a channel for drying air. The elongated nozzle lip has a planar portion and at least one stabilizing zone for the drying air which extends over the entire width of the nozzle and which interrupts the planarity of the planar portion of the nozzle lip. Each stabilizing zone includes equalizing openings, so spaced from the nozzle slot that stabilization of the flow is assured with widely varying drying air velocities.

Abstract: An adjustable orifice fluid knife utilizing a fluid such as air and including a supporting structure adapted to be connected to a source of fluid. A passage network is on the supporting structure terminating in an opening for transmittal of fluid from the fluid source and out of the opening. A nozzle assembly is on the supporting structure in alignment with the opening for directing the flow of fluid therefrom in a controlled high velocity stream capable of acting as a knife. The nozzle assembly includes a fixed plate on one side of the opening at a predetermined angle with respect to the opening. A bar assembly is on the opposite side of the opening and includes an adjustable blade on the bar assembly responsive to adjustment structure to be angularly shifted with respect to the opening and the fixed plate to a variety of different positions along its length thereby providing for a range of orifice sizes along the length of the blade in alignment with the opening for passage of fluid therethrough.

Abstract: A steam distribution apparatus includes a first header having an inlet for steam and a plurality of discrete outlets for steam arranged along the header. The outlets increase in size with distance from the inlet. A first chamber surrounds the first header to receive steam from the outlets in the first header. There are first, relatively large outlets in the first chamber. The relative positions of the first header and the first chamber ensure that steam leaving the plurality of outlets in the first header impinges on the interior of the chamber and must travel around the chamber to reach the first outlets in the first chamber. A second chamber communicates with the first outlets from the first chamber. There are outlets in the second chamber. A shrouding is positionable above a paper web and communicates with the elongate outlets in said second chamber. The apparatus permits uniform steam flow along the entire length of the distributor.

Abstract: A laser nozzle, optical cavity walls, and combustion manifold system is formed having a plurality of laser nozzle members formed having two elongated projections on each side thereof, a forward projection and a rearward projection, and when said members are placed together, the rearward projections meet to form a solid wall while said forward projections are spaced to form an elongated nozzle. Side plates enclose the ends of the nozzle members and end plates cover the ends of the side plates and exposed surface of the end nozzle members. A cavity is formed between each pair of meeting rearward projections and spaced forward projections of adjacent nozzle members. A hot gas flow distributor liner is placed in each cavity through an opening in one side wall. The liner has a plate at one end which mates with a recess in the outer surface of the side wall. An opening in said plate is connected to the inside of said liner.

Abstract: A distribution duct for a reactor which can be easily fabricated. The duct has an elongated back plate and an elongated perforated front plate made up of flat segments separated by elongated angular breaks, and two flat marginal edge portions on the opposite sides thereof, the marginal edge portions being in flush engagement with, and secured to the back plate adjacent to the sides thereof, the flat segments defining with the back plate a flow chamber.

Abstract: In a burner tube having burner ports formed by a series of struck-in tabs, improved structure wherein the tabs have trapezoidal shape to increase the amount of unsevered metal supporting each tab, each tab being formed by cutting through the tube wall along a line perpendicular to the tube axis and then simultaneously bending the tab inwardly and severing the tube wall from the ends of the cut along lines which converge in an outward direction.

Abstract: The liquid sprayer pipe made of a flexible material has liquid spraying slits inclined in an acute angle with respect to a wall of the liquid sprayer pipe. The slits are opened with vibrations by the pressure of a liquid which passes through the liquid sprayer pipe, whereby the liquid is sprayed in a wide range and in a long distance along the liquid sprayer pipe. In the case of a cylindrical pipe, the liquid spraying slits are formed along a tangent of an inner surface of the pipe.

Abstract: The present invention relates to gas treating apparatus for treating web-like or granular material conveyed through the apparatus, and more particularly to a novel nozzle arrangement for such apparatus which insures that a uniform, unbroken stream of treating medium impinges against the web-like or granular material. The present invention is particularly applicable to the transverse orientation of polymer film, the drying of particulate material, the drying or heat setting of films or fabrics, and other such applications where precise control of processing conditions is required.

Abstract: A laser nozzle, optical cavity walls, and combustion manifold system is formed having a plurality of laser nozzle members formed having two elongated projections on each side thereof, a forward projection and a rearward projection, and when said members are placed together, the rear projections meet to form a solid wall while said forward projections are spaced to form an elongated nozzle. Side plates enclose the ends of the nozzle members and end plates cover the ends of the side plates and exposed surface of the end nozzle members. The cavity formed between the two projections is fed a lasing gas through openings in the side plates from a manifold system. The laser nozzle members can be internally cooled along with associated combustion distribution manifolds.

Abstract: A laser nozzle and optical cavity wall construction is formed of a plurality of stacked blocks bonded together to prevent inter-nozzle leakage and optical cavity sidewall mismatch in the flow area significant thereto. The blocks are formed having end sections which are bonded together with contoured center sections forming the plurality of nozzles and with integral elongated projections extending downstream to form the optical cavity walls. The blocks have hollow ends which absorb thermal expansion in bending rather than in crushing and tension. The laser device flanges holding the ends of the blocks are also provided with a cantilevered spacing block which maintains a seal load while allowing for expansion, preventing undue stresses resulting from temperature changes.

Abstract: A distributor duct for a reactor which can be easily fabricated. The duct has an elongated back plate and an elongated perforated flat plate made up of flat segments separated by elongated angular breaks, and two flat marginal edge portions on the opposite sides thereof, the marginal edge portions being in flush engagement with, and welded to the back plate adjacent to the sides thereof, the flat segments defining with back plate a flow chamber.

Abstract: Apparatus and method for removing tarry deposits from the sealing surface of coke oven doors. At least the lowermost portion of the sealing surface is cleaned by reciprocating, fan-shaped, high pressure water jets, directed so as to undercut the tarry deposit. Removal of the deposits from the side portions of the sealing surface may be accomplished by the use of movable scraper blades which on encountering a hard deposit are adapted to be pressed more firmly into the deposit.

Abstract: Apparatus is disclosed which provides for the efficient self-watering of plants from a moving flow of water in a display unit tray. The watering apparatus includes an interior upright drain conduit disposed within the tray. This conduit includes drain aperatures providing a continual first flow of water from the tray. A cap including a top and a skirt extending downwardly substantially perpendicular to the top is disposed on the conduit and is movably adjustable thereon. A plurality of aperatures extend through the skirt of the cap and communicate with the conduit to provide a selectively varied record flow of water from the tray in conjunction with a relieved portion on the conduit which selectively communicates with the plurality of aperatures extending through the skirt of of the cap.