Abstract: The process described herein comprises the mixing of a chilled gas into a stream of gas-suspended particles. Preferably the chilled gas is the same as the gas in which the particles are suspended and the particles are electrostatically charged. A novel device is described which provides a chamber extending lengthwise of the device into which channels feed the chilled gas into the particle suspension. The chilled gas is introduced from an external cooling system with the gas being advantageously cooled during passage through a coil whose outer walls are cooled by liquid nitrogen or dry ice. This process and device are of particular utility in a system for the spraying of electrostatically charged particles.

Abstract: A cooling arrangement for the trailing edge of a nozzle flap 18 has a trailing edge liner 30,54 and a baffle plate 32,55. Air from plenum 22 passes through openings 38,54 to cool the trailing edge liner. Expansion of the nozzle liner 18 causes abutment seal 52 to open, increasing cooling air in proportion to the temperature of the nozzle liner.

Abstract: A cooled liner assembly for a nozzle has a plurality of longitudinally aligned support hinges secured to a support plate. A thin plate liner of arcuate shape is hinged to the support hinges with cooling air supplied between the liner and support plate. The liner is lightweight resisting the differential pressure of 25 psi in membrane hoop stresses, with components experiencing bending moments remote from the hot gas inside the nozzle.

Abstract: The invention provides a method and an apparatus which assure a sustained vaporization of deodorants, perfumes, pest control agents and other substances intended to modify, condition on otherwise alter the atmosphere. A tape comprising a base material and, as supported thereon, at least one active substance which vaporizes at ambient temperature or under heating in a condition in which its vaporization is inhibited is driven relative to a head which is adapted to remove the inhibition of vaporization, whereby the active substance is vaporized at a constant rate.

Abstract: A nozzle for the refining of metals by oxygen blasting from above the melt is presented. The nozzle includes a nozzle head having a blast pipe therethrough upstream of the mouth of the nozzle. The blast pipe directs a jet of gas comprised, at least in part, of oxygen, having a supersonic speed onto the melt. The blast pipe includes an inner tube. The lower portion of the inner tube has a throat positioned between a convergent and divergent sections, this lower portion defining a laval nozzle. The blast pipe also includes an outer tube coaxial with the inner tube and having a greater cross section than the inner tube. The mouth of the inner tube is spaced back (downstream) from the mouth of the blast pipe. The inner and outer tubes are each provided with flow control valves, and are connected to sources of pressurized gas. Devices are provided to vary the cross sectional area of the mouth of the inner tube.

Abstract: A snowmaking apparatus is formed of a concentric tubes to define an outer flow passage and an inner circular passage with water carried within the inner flow passage ejected across a pressure compensated annular gap defined by the end of the inner tube and the confronting surface of a spring biased nozzle disk tending to close off that annular gap. The same nozzle disk defines a second annular gap between the nozzle disk and an annular ring fixedly mounted within the outer flow passage has an end face confronting the end face of the nozzle disk.

Abstract: A fluid spray apparatus for oscillating a fluid discharge head attached thereto and a self-oscillation apparatus. The fluid spary apparatus may have a mounting for receiving and holding a fluid discharge device or devices, the mounting member being pivotably connected to dual supports which are in turn movably mounted on a body member with a lost motion means so that a component of the force reacting to the fluid discharge effects oscillating movement of the fluid spray device.