Abstract: A compressor (20) has an unloading slide valve (100). The valve has a valve element (102) having a range between a first condition and a second condition, the second condition being unloaded relative to the first condition. A first surface (200) of the valve element (102) is in sliding engagement with a second surface (202) of the housing (22) during movement between the first and second conditions. The valve element is coupled to an actuating piston (124). The compressor includes a linear bearing (132) guiding a piston shaft (122).

Abstract: A method is provided for making a catalyst support, and includes the steps of providing an aqueous suspension of refractory inorganic oxide and refractory inorganic carbide; forming the suspension into droplets; exposing the droplets to a gelling agent whereby the droplets are at least partially solidified so as to provide substantially sphere-shaped portions of refractory inorganic oxide and refractory inorganic carbide; and drying and calcining the sphere-shaped portions so as to provide substantially spherical particles of catalyst support containing refractory inorganic oxide and refractory inorganic carbide. Catalytically active metal phases and hydrogenation processes using the catalyst are also described.

Abstract: An accessory for a fuel burning or processing engine or machine is provided. The accessory comprises a core formed of a material having ferri-magnetic properties. The core is of elongate form and defines a recess adapted to receive a high tension lead. The accessory further comprises a clamping device for clamping the high tension lead and retain it in the recess. The core is retained within a housing formed of a non-ferrous material. The housing is provided with a device for receiving calibrating elements formed of a material with high magnetic permeability at low field strength and low hysteresis loss.

Abstract: A discharge lamp lighting device is provided to comprise tube current detecting circuits 51 to 5n for outputting detection signals VI1 to VIn of tube currents I1 to In flowing through each discharge lamp 11 to 1n from an inverter 3 connected to DC power source 2 via a plurality of transformers 41 to 4n, a maximum detector 6 for detecting a maximum value VIMX of detected signals VI1 to VIn from current detector 51 to 5n, a minimum detector 7 for detecting a minimum value VIMN of detected signals VI1 to VIn from current detector 51 to 5n, a comparison circuit 8 for computing one or plural values of sum, difference, product and quotient between maximum value VIMX from maximum detector 6 and minimum value VIMN from minimum detector 7 to generate a cease signal VCP when the computed value exceeds a given value, and a control circuit 9 for halting operation of inverter 3 when comparison circuit 8 generates cease signal VCP.

Abstract: A gas turbine engine is piloted with a pilot flow of fuel delivered to a combustor as a liquid. A first additional flow of the fuel is also delivered to the combustor as a liquid. A second additional flow of the fuel is vaporized and delivered to the combustor as a vapor. A fuel injector may have passageways associated with each of the three flows.

Abstract: A method for altering operation of a nerve related to a given body condition includes the steps of identifying at least one nerve root of a nerve related to the given body condition; laparoscopically implanting at least one electrode on the nerve root; and operating the electrode to electrostimulate the nerve root and alter operation of the nerve.

Abstract: A device for transporting freight, especially freight containers in the cargo compartments of aircraft, especially to a power drive unit (PDU) having a drive roller (3) received in a frame (1) wherein the at least one drive roller (3) carrying the drive roll (4) placed thereon is mounted so as to be pivoted relative to the frame for the purpose of replacing the drive roll (4).

Abstract: A gas turbine engine combustor has forward bulkhead extending between inboard and outboard walls and cooperating therewith to define a combustor interior volume or combustion chamber. At least one of the walls has an exterior shell and an interior shell including a number of panels. Each panel has interior and exterior surfaces and a perimeter having leading and trailing edges and first and second lateral edges. A number of cooling passageways have inlets on the panel exterior surface and outlets on the panel interior surface. The shell has a plurality of holes for directing air to a space between the shell and heat shield and adapted for preferentially directing said air toward leading edge portions of first stage vanes of a turbine section.

Abstract: A method is provided for engineering a single crystal cast gas turbine engine first component for cooperating with a second component. An at least local first operational stress on the first component is determined. The first operational stress has a first direction. A crystal orientation within the component or a physical configuration of the component is selected so that the first operational stress produces a desired engagement of the first component with the second component associated with either a negative Poisson's effect or high Poisson's effect in a second direction. Single crystal or highly textured iron- and nickel-base alloys enable one to use such effect in high temperature and/or corrosive environments.

Abstract: A gas turbine engine air valve assembly has first and second valving elements. The second element is rotatable about a first axis relative to the first element. The rotation controls a flow of air through the first and second elements. An actuator is coupled by a linkage to the second element. The linkage includes a spindle having a first portion coupled to the actuator to rotate the spindle about a second axis. A guided spherical bearing couples a second portion of the spindle to the second element.

Abstract: A telescope has an entrance pupil region; a first concave mirror (M1) belonging to a first rotationally symmetric aspheric surface and reflecting light passing through the entrance pupil region; a second convex mirror (M2) belonging to a second rotationally symmetric aspheric surface and reflecting light reflected by the first mirror; a third convex mirror (M3) belonging to a third rotationally symmetric aspheric surface and reflecting light reflected by the second mirror; a fourth concave mirror belonging to a fourth rotationally symmetric aspheric surface and reflecting light reflected by the second mirror to an exit pupil. The first, second, third and fourth rotationally symmetric aspheric surfaces are centered on the symmetry axis of the third mirror. The first, second and fourth mirrors are centered along the first direction perpendicular to the optical axis and off-centered in a second direction perpendicular to the symmetry axis and to the first direction.

Abstract: The invention concerns a method for compressing and decompressing a structured document, associated with at least a tree diagram structure defining a document structure and comprising nested structure elements, associated with a type of information, and representing sets of data, the method comprising steps which consists in: performing a syntactic analysis of the structure diagram and standardizing it so as to obtain a single predefined sequence of the elements of the diagram; compiling the standardized diagram to obtain finite automata, each automaton comprising states interconnected by transitions respectively representing the elements of the structure; and compressing the document, and executing at least a compression algorithm associated with a type of information, when a set of data having the type of information is encountered in the document.

Abstract: A method for controlling blade tip clearance within a gas turbine engine includes a compressor having at least one first rotor assembly, wherein the blade tips in each of at least one first rotor assembly has a mating geometry with at least one of at least one blade seal surfaces, and a clearance distance extending between the blade tips and the blade seal surfaces; a turbine having at least one second rotor assembly, wherein the blade tips in each of at least one second rotor assembly has a mating geometry with at least one of at least one blade seal surfaces, and a clearance distance extending between the blade tips and the blade seal surfaces; providing an actuator selectively operable to move at least one rotor assembly relative to the shroud; providing an electronic engine controller having a control logic for operating the actuator; and moving at least one first rotor assemblies and at least one second rotor assembly relative to the shroud using the actuator at a response rate according to the control l

Abstract: A method for intensifying combustion of gas-fuel mixtures consists of stimulating the combustion mixture in a combustion chamber by a pulsed high-voltage discharge of nanosecond duration, wherein the discharge amplitude is set up according to a condition of maximising a heat input in electronic degrees of freedom and in a gas dissociation and preventing the passage of plasma electrons to an escape mode at a main discharge stage, the high-voltage pulse leading edge build-up time is limited by the condition of obtaining a homogeneous filling of a discharge gap by plasma and a pulsed energy efficient transmission to the plasma, a high-voltage pulse time is limited by the condition, wherein a highly-unstable plasma state is attained, the discharge gap resistance is reduced, the discharge gap is better matched to a generator, and an efficient electric power input into the plasmas is obtained.

Abstract: A segmented abradable ceramic coating comprises a bond coat layer, at least one segmented 7 weight percent yttria-stabilized zirconia layer disposed upon said bond coat layer, and at least one 12 weight percent yttria-stabilized zirconia layer disposed upon said at least one segmented 7 weight percent yttria-stabilized zirconia layer.

Abstract: A system for the projection of cinematographic works or digital works with sound having at least one sound channel. The system comprises a screen and, for the sound channel, at least one woofer and at least one medium/treble transducer. The screen is a non-perforated screen. The medium/treble speaker is a flat sound transducer placed against the screen to the rear thereof in relation to the direction of projection. An extreme treble speaker is disposed on the periphery of the screen.

Abstract: The invention increases the fidelity of gas turbine engine module performance estimates that in turn enhance performance tracking and visibility. The methodology obviates input signal filtering since filtering may mask the onset and detection of a rapid measurement shift indicative of serious engine performance issues. The invention supports trend detection processes for timely detection, isolation and alerting of performance and engine system related faults.

Abstract: To provide a portable chord producing device capable of producing chord sounds by a simple operation. In or on a housing 10 of a portable size, an operation switch 121 with which eight different chord sounds can be designated, and a display screen 11 which also serves as a touch sensor panel are formed. A memory card 20 has a chord data file recorded thereon that is used for letting chord sounds that have characteristics of sounds on a real musical instruments be produced. The chord producing device produces the chord sounds designated by the operation switch 121 through a sound production mechanism in a manner that is associated with a specific touch operation only during the time when it is selected.

Abstract: A spread spectrum method for a digital input signal (x(n)), comprising the following steps: coefficients of a reversible digital periodical linear filter are selected in such a way that the spectrum of the input signal (x(n)) is spread in order to occupy a spread frequency band (B) with the exception of at least one eliminated frequency sub-band (B?), included in a spread frequency band, and the input signal is processed via the digital periodical linear filter in such a way as to obtain a spread spectrum output signal (y(n)).

Abstract: In one aspect a method for remotely managing a non-compliant Internet Gateway Device (IGD) residing in a Local Area Network (LAN) is provided. The method includes providing a proxy agent that resides on a computer in the LAN. The proxy agent receives from a Wide Area Network (WAN) configuration device a Customer Premises Equipment (CPE) WAN Management Protocol (CWMP) request message, converts the request message to a protocol that is used by the IGD and communicates the converted request message upstream toward the IGD. The proxy agent receives a response from the IGD, converts the response from a first protocol to the CWMP, and sends the converted response upstream toward the WAN configuration device.