Abstract: An improved multi-boom field spraying apparatus designed to spray in a sequential manner one or more of a plurality of liquids to a selected spray zone among a number of spray zones is described. The apparatus contains a novel spray, agitate air and rinse system. A novel spray boom and vessel apparatus are also described.

Abstract: A nozzle for the gunning of monolithic refractories, being provided with a liquid adding mechanism (6), characterized in that an air or air-liquid mix feeding portion (4) having an inlet (4a) and a tube protecting pipe (3) are arranged in order following the liquid adding mechanism (6), a flange portion (1a) of a flexible inner layer tube (1) is anchored on the liquid adding mechanism side of said feeding portion (4) while another flange portion (2a) of a flexible outer layer tube (2) is anchored on the side of an outlet (10) of the feeding portion (4) thereby to insert the inner layer tube (1) into the outer layer tube (2), and an annular dead space (11) communicating with the inlet (4a) is formed between the inner layer flange portion (1a) and said outer flange portion (2a).

Abstract: A pneumatic pesticide duster for use in the application of pesticide dusts in structures. The apparatus comprises a dust reservoir, compressed air source, manually operated control valve and metallic discharge tube having an opening ranging in size up to about 3/4 inch capable of imparting an electrostatic charge to the expelled air/dust mixture such that dust is attracted to the walls of the structure and to insects therein. The apparatus is easily handled by one person while the amount of pesticide dispensed within the structure and the areas to which the pesticide is confined can be closely controlled.

Abstract: A powder feed system with a recirculator is provided for a plasma spray apparatus so that spraying operations may be started and stopped abruptly. The subject system utilizes a pressurized gas to direct a powdered material from a powder feed hopper to the plasma spray applicator. A diverter valve is located intermediate the powder feed hopper and the plasma spray applicator and in close proximity to the plasma spray applicator for selectively diverting the powdered material toward or away from the plasma spray applicator. Powdered material diverted away from the plasma spray applicator is directed to a powder accumulator for subsequent reuse. The powdered material is kept in continuous motion during both spraying and diverting operations thereby avoiding the need to overcome inertia each time spraying operations are commenced.

Abstract: A fertilizer spreader includes an attachment assembly for use with a portable hand-held air blower for entraining granular fertilizer or the like into the discharge air stream of the blower, whereby the fertilizer is broadcast by the air stream over a lawn or garden area. The attachment assembly comprises an adapter nozzle connected in-line with the discharge air stream of the blower and including a pressure port through which a portion of the discharge air stream is directed for passage through a pressure tube to a diffuser mounted within a portable vented fertilizer-receiving container near the bottom thereof. The diffuser turns the air stream upwardly within the container and divides the stream into a plurality of turbulent air flows for agitating and suspending particles in a localized region above the diffuser, with a substantial portion of the air stream escaping from the container through a vent at a position remote from the localized region.

Abstract: Powder, such as metallic powder for marking workpieces, consists of a blend of fine powder and of coarse powder.

Abstract: The invention relates to a device for a nozzle of a powder sprayer, which by way of example can be used for spraying for example color powder, which is electrostatically charged, or for disintegration and distribution of solid particles in powder form transported in a gas stream. By means of the present device, which is easy to operate and easy to connect with a transportation circuit respectively, the particle material is effectively disintegrated and distributed. The device has means (17; 51, 58, 75, 76) for the introduction of a gas stream under pressure in the stream of particles flowing through the device, whereby the powder during its forward transportation through the device under simultaneous compression is mixed with the gas rushing in.

Abstract: A portable rock dust blowing apparatus comprising a wheel or skid supported framework upon which is mounted a blower designed to derive it's driving power from a belt engaging roller which is also supported on the framework. Also mounted on the framework is a pair of inverted U-shaped channel members which are employed for adjusting the framework relative to an endless belt travelling under the framework. A hopper for containing a rock dust or the like is used along with the aforesaid apparatus whereby the blower assembly will be employed for directing the rock dust on to the walls, ceiling and floor of a mine tunnel or shaft by one utilizing the rock dust blower of the present invention.

Abstract: A fertilizer spreader includes an attachment assembly for use with a portable hand-held air blower for entraining granular fertilizer or the like into the discharge air stream of the blower, whereby the fertilizer is broadcast by the air stream over a lawn or garden area. The attachment assembly comprises an adapter nozzle connected in-line with the discharge air stream of the blower and including a pressure port through which a portion of the discharge air stream is directed for passage through a pressure tube to a diffuser mounted within a portable fertilizer-receiving container near the bottom thereof. The diffuser turns the air stream upwardly within the container and divides the stream into a plurality of turbulent air flows for agitating and suspending particles in a localized region above the diffuser.

Abstract: A method and apparatus are disclosed for the spraycoating of the interior of a hollow body, one region of which, e.g. a seam, must receive a heavier coating than the remainder of the surface to be sprayed. A single spray coating operation is performed, in which a relatively heavy spray jet is concentrated on the seam and a relatively thin cloud of coating material is used to coat the entire interior surface of the body. Preferably, a cloud of electrostatically charged coating material is formed by an atomizer fed by a feed conduit from which a certain amount of coating material is diverted to be formed into the relatively highly concentrated spray jet directed at the seam. The relatively high-velocity particles of material of the spray jet which is concentrated onto the seam and the relatively low-velocity particles of material of the coating cloud together produce on the seam a thinner layer of material than would normally suffice and which, nonetheless, adheres well.

Abstract: Line painting equipment mounted on a small tractor with an air compressor mounted on the front of the tractor and a paint containing tank mounted on its rear portion. A further elongated pressurized paint container is mounted on one side of the tractor and inclined downwardly towards the front of same. A boom is clamped to the tractor forward of the pressurized paint container which is also normally inclined downwardly towards the front of the tractor. The boom is so secured to the tractor that it can be selectively rotated on its longitudinal axis, moved outwardly on a substantially vertical axis and moved vertically about a substantially horizontal axis. A paint spray gun is removably mounted on the front of the boom as is an adjustable boom support wheel which governs the height of the paint spray gun over the underlying surface. An adjustable guide to indicate to the operator where the paint is sprayed is mounted from the steering linkage of the tractor.

Abstract: A device for marking workpieces by means of powder includes a nozzle from which emanates a powder spray circumscribed by a heating flame with a burner being at one end of the nozzle attached for powder marking and whose other end is attached to a powder container connected to the nozzle via a tube.

Abstract: Apparatus for evenly and uniformly depositing particulate suspended in a gas on at least one surface, and in at least one direction, of a substrate. The apparatus has an exit slit (13) and a passage for communication of product including a main conduit (1), a plurality of secondary conduits (2) which are of equal length and internal diameter and a primary slit (6) communicating with a chamber (7). The slits are coextensive in length and the secondary conduits, of equal length, connect along the primary slit at regular spacing so that product is delivered uniformly to said exit slit.

Abstract: The apparatus comprises an explosion chamber made in the form of a tube closed at one end and accommodating at least one spark plug. The explosion chamber communicates with a chamber for preparation of an explosive mixture and with a batcher metering pulverulent coating material. The batcher includes a mixing chamber of the batcher communicating with a hopper via a passage. The passage accommodates a device for controlling the cross-sectional area thereof and is provided with a jet nozzle for positively feeding the coating material to the explosion chamber. A partition wall of a gas-permeable material is mounted within the hopper in equally spaced relation to the walls thereof to define an annular space communicating with a compressed gas source prevent self-compaction of the powder. A non-return valve is mounted in the batcher passage in the portion thereof connected to the hopper to close the passage in case of back impact from the explosion chamber.

Abstract: An electrostatic flocking system having a hopper for gravitationally feeding flock fibers at a controlled rate to a pickup chamber in an air flow pump. The flow pump has a venturi inlet connector with a multi-branched outlet for delivering accelerated air into the pickup chamber. The pickup chamber has an arcuately recessed bottom wall to cause air from the inlet connector to swirl within the chamber to entrain the flock fibers and to carry them out of the flow pump via an outlet connector to an applicator gun. Conveniently, the flow pump has an auxiliary air inlet port opening into the pickup chamber to allow additional flock-entraining air to be pulled into the chamber by the air swirling therein. The applicator gun has a non-conductive outlet nozzle for reception into the front of the applicator gun, with a plurality of electrodes extending forwardly from the nozzle for electrostatically charging flock fibers passing therethrough.

Abstract: An electrostatic spray gun for powdered material in which separate connecns for supplying powder and compressed gas are provided. An intake for introducing the powdered material to a conveying gas stream, and a spray tube and spray nozzle are also provided with the gun. A charging device charges the powder electrostatically. The connections for the powder and compressed gas supply, as well as an injector are held in a common housing portion. Supply channels for the powder and conveying gas lead from their respective connections to the injector. A metering gas channel leads from the compressed gas connection to the powder supply channel, and control valves are provided in the metering gas channel and the conveying gas channel. The common housing portion has a connection for a powder magazine and a connection for loosening gas to be supplied to the magazine. This connection leads to the compressed air connection via a passage located in the housing portion and having an additional control valve.

Abstract: A chemical fire extinguishing apparatus which includes a chemical storage chamber, chemical discharge conduct connected to the chamber for conveying and distributing the chemical, and a source of relatively high pressure gas connected to the chamber and communicating with the interior thereof to agitate and fluidize the extinguishing chemical by impingement of high pressure gas. Upon agitation and fluidization, gas is delivered then to the chamber at a lower pressure to entrain the chemical in a constant, relatively low pressure gas stream flowing from the chamber to the chemical discharge conduit.

Abstract: A disperser of a powdery cloud which may be used to defeat infra-red sens used by enemy forces and an arrangement which will effectively and efficiently produce a cloud of powder for military applications.The disperser is provided with a barrel containing powder to which a cover is secured. The cover has an axial opening provided with an upper and lower cylindrical pipe section communicating therewith. A hollow elbow-like pysi is also secured to a second opening in the cover. Air is forced into the upper cylindrical pipe and travels down through the lower cylindrical pysi into the powder. This forced air carries the powder up to the elbow-like pipe and out into the atmosphere as a powdery cloud. Control of the dispersion process is by means of two slide-valves provided on the upper cylinder pysi.

Abstract: A dry powder aerosolizer for both dispersing and investigating the propers, behavior and measurement of airborne particles has a cylinder and a piston head dividing the cylinder into first and second sub-chambers. The first sub-chamber contains a quantity of dry powder and the second sub-chamber has an inlet opening in communication with an input flow controller admitting pressurized air flowing into the first sub-chamber about the periphery of the piston head to aerosolize the dry powder. The aerosolized powder exits the aerosolizer through a flow control tube extending through a square shaft to which the piston head is mounted. An opposite end of the square shaft extends through a Pelton turbine wheel to which a tangential flow of pressurized air is introduced from the input flow controller to cause rotation of the piston head.