Abstract: In a device for supplying secondary air in a gas turbine engine provided with an inner shaft (8) supporting a low pressure compressor and a low pressure turbine and a hollow outer shaft (7) coaxially nested with the inner shaft and supporting a high pressure compressor and a high pressure turbine, a seal air introduction passage (41, 45, 48) for introducing a part of high pressure air drawn from the high pressure compressor into a seal section provided in each of the bearing boxes is provided with a high pressure air introduction turbine (62) attached to the outer shaft in a rotationally fast manner.

Abstract: In a device for supplying secondary air in a gas turbine engine provided with an inner shaft (8) supporting a low pressure compressor and a low pressure turbine and a hollow outer shaft (7) coaxially nested with the inner shaft and supporting a high pressure compressor and a high pressure turbine, a seal air introduction passage (41, 45, 48) for introducing a part of high pressure air drawn from the high pressure compressor into a seal section provided in each of the bearing boxes is provided with a high pressure air introduction turbine (62) attached to the outer shaft in a rotationally fast manner.

Abstract: A method for manufacturing an oxide superconductor thin film is disclosed, which comprises the steps of: (1) preparing a substrate; depositing an oxide superconductor thin film on said substrate by directing a beam containing constituent elements of an oxide superconductor to said substrate; and supplying excited oxygen to or near a thin film deposition site on said substrate during the deposition of said thin film, wherein said beam is selected from the group consisting of an ion beam, neutral particle beam, molecular beam, cluster beam and cluster ion beam, and wherein said excited oxygen is produced by means of generating discharge in an oxygen gas or oxygen-containing gas or by irradiating an oxygen gas or oxygen-containing gas with a beam.

Abstract: A method for manufacturing an oxide superconductor film is disclosed, which comprises the steps of: preparing a substrate; depositing an oxide superconductor film on said substrate by chemical vapor deposition (CVD); and supplying excited oxygen to or near a film deposition site on said substrate during the deposition of said film.

Abstract: A metal vapor laser apparatus has a gas supply device. The device supplies at least two kinds of gases to a container of the laser apparatus controlled individually. One of the gases is selected from the group of the molecular gas such as hydrogen gas, the other is selected from the group of rare gas such as neon gas. By adjusting the mixture ratio of these gases, the laser beam output is obtained efficiently. The molecular gas should be supplied when a metal lump, such as copper, arranged in the container is melting.

Abstract: A contrarotating propeller type propulsion system having first and second output rotary cylinders which are carried individually on an outside support cylinder fixedly secured to a first support structure, the first output rotary cylinder being borne on the outer peripheral surface of the first support cylinder through bearings and the second output rotary cylinder borne on the inner peripheral surface of the first support cylinder through bearings. The first and second output rotary cylinders serve to support the first and second contrarotating propellers, respectively. The first and second output rotary cylinders are supported on the first support cylinder at two axially spaced points. The driving shaft is borne on a second support cylinder fixedly secured to the support structure and surrounded by the first support cylinder.

Abstract: A vacuum ultraviolet light source for generating a pulse discharge in a low pressure gas and extracting ultraviolet light from a plasma created in that discharge, is disclosed which comprises a discharge space P, a plate-like anode located in the discharge space, a plurality of hollow cathodes located in the discharge space in an opposed, spaced-apart relation to the anode, auxiliary electrodes provided in an inside space of the hollow cathode in a state shielded from the hollow cathode, means which, while maintaining a pressure in the discharge space constant, flows a gas along a route in the discharge space after passing through an inner space in each hollow cathode, a power supply for supplying an electric power for generating a main discharge across the hollow cathode and the anode after a pre-discharge is produced across each hollow cathode and the anode, and ultraviolet extracting means for extracting ultraviolet light radiated from a plasma which is produced by a discharge in the discharge space.

Abstract: A laser beam 5 is directed to a target made of an oxide superconductor to allow a target spot which is irradiated with the beam to be evaporated and a matter which is evaporated to be deposited as a thin film on the surface of a substrate 3 at which time excited oxygen is supplied to or near a thin film deposition site on the substrate 3. In this way, an oxide superconductor thin film is formed on the substrate with oxygen atoms incorporated in the crystal structure of the thin film.

Abstract: Disclosed is a laser apparatus for effecting laser oscillation by exciting a laser medium by discharge between an anode and a cathode opposedly arranged to each other in a discharge tube, comprising means disposed in the discharge tube to support both the electrodes movably along the axial direction of the discharge tube so as to prevent warp of the electrodes on laser oscillation and keep the parallelism therebetween with high accuracy. Also disclosed is a laser apparatus comprising main discharge means for effecting laser oscillation by exciting a laser medium by generating discharge, and preionization means for generating ionization previously to the discharge by the main discharge means so as to stabilize laser oscillation under a high gas pressure and a high current density.

Abstract: An X-ray preionization pulse laser comprises a laser tube in which a pair of main electrodes are disposed to face each other. Pulse discharge between the main electrodes excites a laser medium, thereby obtaining laser oscillation. The laser has a sealed vacuum chamber in which a sliding discharge area is arranged. The sliding discharge area produces sliding discharge that generates X-rays for preionizing the laser medium before the main discharge occurs for laser oscillation.

Abstract: Disclosed is a turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, wherein: a plurality of variable nozzles are arranged outside of a throat section having a locally minimum cross section which is defined in the turbine casing around the turbine wheel. The variable nozzles may be defined by fixed vanes and moveable vanes which cooperate with each other in such a manner that each of the moveable vanes and the corresponding fixed vane define a substantially smooth and continuous airfoil. The moveable vanes may be pivotally supported by a back plate of the casing while the fixed vanes may be integrally provided with a fixed vane member having a disk portion which defines a surface opposing the inner surface of the back plate.

Abstract: The soft X-ray apparatus of the present invention includes a vessel at low pressure or a vacuum in which a liquid target material, preferably mercury, is discharged in the form of a series of discontinuous droplets. The flow of the droplets of liquid target material is controlled by a control device, and synchronized with a high energy pulse beam, preferably a high energy laser pulse beam, provided by a laser device through a window in the vessel. In the preferred embodiment, this laser device also is controlled by the control device so that the laser pulse beam impinges a droplet of mercury inside the vessel to produce plasma to thereby generate soft X-rays. The droplets of mercury are sized to correspond to the size of the laser pulse beam at the point where the laser pulse beam impinges the droplet of mercury to maximize the strength of the soft X-rays and efficiently utilize the power of the high energy laser pulse beam. The soft X-rays exit the vessel through additional windows for subsequent use.