Abstract: An improved paint ball gun and improved rotary breech, regulator, control valve, power piston and power valve assemblies for utilization in paint ball guns or related devices. The paint ball gun eliminates moving metal to metal surfaces to provide a consistent operation and easy regulation. The paint ball gun has a rotary breech to minimize damage to paint balls utilized in the paint ball guns.

Abstract: A device for curling polypropylene ribbon comprises means (12) for delivering a supply of curlable ribbon, curling means (17) for the ribbon, and drive means (31-33) for drawing the ribbon across said curling means. The device may include guide means to control the approach angle of ribbon to the curling means, drag means to impose drag on said ribbon, and shredding means to shred said ribbon subsequent to curling.

Abstract: The wall downstream of the slot of an ejector forms a divergent angle relative to the upstream wall adjacent to the slot so that the flow discharging from the slot expands and avoids having the primary air from pinching the secondary air and adversely affecting the cooling film issuing from the slot. When multiple slots in the ejector are utilized the downstream wall in relation to the upstream wall is similarly configured to obtain local multi-expansions.

Abstract: A fuel/mixer injection system for a combustor of a gas turbine engine comprising two major assemblies including a burner-mounted swirler with two outer air passages surrounding a central passage and a piloted air fuel nozzle containing a main fuel injection orifice and a pilot fuel injection orifice the main fuel mixes with swirling air in the central passage and the pilot fuel mixes with the swirling air in the outer air passage. In another embodiment, the piloted fuel nozzle contains an airblast-atomized main fuel injector annulus and a concentric ring with a plurality of circumferentially spaced holes feeds air to the main fuel injector annulus.

Abstract: A relatively inexpensive cannula is sized by including indica on a cannulated dilator that is used to measure the depth of a body cavity, and in one embodiment with the use of a cuttable fixture inserted into an initially enlarged dilator retractor made from a cuttable material the excess of the dilator retractor is snipped by a commercial cutter. A tool engaging the end of the cannulated dilator provides leverage on the cannulated dilator for rotation as it is forced into the body cavity, a pusher tool provides leverage on the dilator retractor for inserting the dilator retractor into the body cavity. A clamp that fits the top of the dilator retractor serves to support the dilator retractor through an arm to a rigid structure. In an alternate embodiment one of a series of sized dilator retractors are selected commensurate with the measurement attained by the scaled cannulated dilator.

Abstract: A convergent spray gun which combines a liquid resin and dry metallic powder externally of the nozzle of the spray gun that utilizes a pair of diametrically opposing passages disposed at 0.degree. and 90.degree. relative to the central resin discharging orifice where the central orifice is approximately 0.015 inch and the air for atomizing the fluids is approximately 0.187 inch and the atomizing angle is approximately 180.degree.. The metallic filler is added to the plume of the convergent spray at the low pressure section and the ratio of the fluids are controlled by a computerized system. The spray gun, controls and mixing chambers of the resin (two part) and powder fillers are housed in separate rooms and the dust where the powder fillers are metered is controlled.

Abstract: Film cooling effectiveness for internally air cooled turbine blades of gas turbine engines is enhanced by including an interconnecting passage to the film cooling hole that is in communication with a lower internal pressure in the blade to create a suction at the exit end of the film hole to limit penetration into the gas stream.

Abstract: Apparatus and method is provided for applying agriculturally active substances in a controlled manner from the ground in the most effective droplet size range and at ultra low volumes so that efficiency is optimized while contamination of areas adjacent to the targeted area is greatly reduced.

Abstract: Two composite parts, such as sheet and a hollow gas turbine liner tile, are fastened together using a fastening system that includes a journal bearing that fits in a bore in the sheet and springs to support a bolt fastener that is tightened to hold the parts together. Resilient spacers are placed between the sheet and the liner. The springs may comprise a stack of rings, each ring being a tightly wound helical spring, giving the ring a hollow cross section and resilient qualities.

Abstract: A flow diverting mechanism for the twin duct offtakes or coannular offtake for a turbo fan engine powering aircraft with either thrust reversing or short takeoff and vertical landing or both capabilities includes a rotary drum mounted between the turbine and afterburner sections and includes ports complementing the inlets in the offtakes to divert the core stream through the offtakes and passages to proportion the fan discharge air utilized for cooling purposes in the engine to cool the liner and walls of the offtakes and the engine components located downstream of the rotary drum while assuring separation of the core stream flow and fan air flow.

Abstract: A blow back rudder consisting of a rudder blade, rudder shaft and a plate assembly that is pivotally mounted to the nozzle of a jet nozzle of a personal water craft is spring biased in the steering mode and is positioned out of the water by the impingement force of the jet stream discharging from the nozzle acting on the plate. This provides off throttle steering. The plate is contoured to allow the plate to remain in the jet stream at low thrust and water craft speeds for rudder steering. In another embodiment, these features are contained and the plate is contoured with a concave face and its position relative to the discharge port of the jet nozzle is controlled in order to obtain reversing of the water craft.

Abstract: A pair of concentric tubes having an inlet and an outlet with the outer tube being closed at either end and the inner tube having a plurality of holes with compound angles designed to impart a swirling motion of the air admitted into the interior of the inner mixing tube. The holes are judiciously located around the inner tube for creating a swirling pattern. The inlet of the tubes leads the dry particles of two different compositions intended to be mixed into the mixer and the outlet leads the mixture to the next station utilizing the mixture. Air admitted internally of the outer tube feed the plurality of holes and the force of the air can be controlled to control the transport of the mixed particles.

Abstract: The internally air cooled turbine cast blade is molded with a ceramic core for defining the interior cavity with coolant passages where the ceramic core is configured to fair radially inwardly at the attachment portion of the blade until they form a single wall, parallel to and centered in the blade attachment. The blade is cast in the mold by pouring molten metal into the mold, curing and the core is leached once the metal is cured and the mold removed. Another embodiment includes a metering plate attached to the root of the blade for metering coolant to provide a coolant to gas flow ratio at the film cooling holes.

Abstract: A portable brick oven is made with a sealed brick lining for the back, opposing side and top walls with a door mounted in the front and bottom bricks defining the cooking chamber. The bottom bricks are not sealed and are aligned to define a flat baking surface and these bricks are located so that the edges of the baking surface are spaced from the back and opposing side walls and the individual bricks are not sealed so that the flame of the burner is capable of flowing between bricks. This arrangement provides, radiant, convective and conduction heating. The brick oven is modular constructed and fits into a chassis mounted on wheels. The door is uniquely hinged and clasped to allow for the ease of access into and out of the brick oven.

Abstract: A damper for the blades of a turbine rotor for attenuating the vibrations excited in a radial direction by configuring the damper to have at least two legs bearing against the blade and the disc supporting the blade for grounding the radial vibrations transmitted radially through the damper and offsetting the center of gravity of the damper from the point of contact with the blade.

Abstract: A portable bow making machine with three clutches controlling the size, arc generation and a no-back clutch assuring that the belt driving the impaler assembly doesn't go into reverse The user requiring no particular skill, merely threads the ribbon in a channel under the reciprocal carriage and the two stroke operation automatically makes one of the loops of the bow. Stroking continues until the bow is complete and a stapler automatically retracts the needles of the impaler and the staple is forced against an anvil to secure the bow. The stapler is configured to hold a removable self-gluing card that is concomitantly attached to the bow. The forward stroke carries a carriage and clapper along the carriage slides, The clapper reaches a predetermined point and drops onto the impaler to secure each of the loops to the bow. The return stroke repositions the carriage for the next forward stroke.

Abstract: The fuel nozzle is configured with a fuel injector with a pair of coaxially mounted air swirlers utilized in an annular combustor of a gas turbine engine that is dimensioned to provide 70-90 percent of the mass airflow in the inner passage and the swirl angle of the inner swirler is 45.degree.-55.degree. and the outer swirler is 70.degree. and the L/D of the combustion hole location relative to the fuel injector is 0.6-0.7 which serve to produce an outer shear layer flame for improved lean blowout characteristics.

Abstract: In a building construction individual concrete panels are formed utilizing a horizontal casting platform to tailor the panels to meet structural and aesthetic requirements with each panel having abutting joints that interlock. The method of installing the panels to erect the building is to prepare the strata including a final layer of mixed sand and stone, wetting the surface, erecting the panels in position and temporarily bracing them and vibrating the strata, attaching the adjacent panels and removing the bracing. The panels are individually molded with a interlocking base on a planar horizontal table including the form edges that are oriented to define the configuration of the panels.

Abstract: The invention is a system of spraying coating on the surface of a substrate with a convergent spray gun that utilized separate pump and flow metering systems. Each part of a two part resin is pumped and metered separately. The third part which is a foaming agent and surfactant is also pumped and metered separately in a mix chamber. All three materials are mixed in the mix chamber and then atomized and combined with dry filler in the convergent zone of the spray gun. The quantity of the filler and the three part foaming resins are proportioned in order to maintain a predetermined ratio.

Abstract: Many industries such as construction and aerospace industries use high build coatings for various purposes. Spray system for applying high build coatings allow thick coating to be applied relatively quickly as opposed to manual methods. The present application provides for a spray system including a spray apparatus having a conveyance device which provides a motive force created by a vacuum for delivering a dry material to the nozzle of the apparatus, the conveyance device including an array of bores for separating the dry material to provide substantially uniform wetting of the dry material when the dry material enters the nozzle. The conveyance device is particularly useful in applying plaster and stucco. The present apparatus eliminates concerns of pot-life, waste and product uniformity by wetting the dry material close to the nozzle outlet.