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| Number | Title | Issue Date |
| 5499765 | Nozzle capable of varying the direction of discharge of fluid therefrom A nozzle is provided which is capable of varying the direction of discharge of a fluid. As shown in FIG. 2 the nozzle 11 has sidewalls defining a circular opening 12 and a plug 14 mounted within the nozzle for transverse movement in the plane of the nozzl... | 03/19/1996 |
| 5273213 | Variable area nozzle for turbomachines A variable area nozzle for a turbomachine comprising, a duct 25, an axially movable shroud 28 located at the downstream end of the duct 25, at least one circumferential array of plates 30 mounted at their upstream ends on the shroud, and an outer wall 34 ... | 12/28/1993 |
| 5261505 | Collision detector for a vehicle A collision detector for a vehicle, comprises a waveguide which is locatable on and acoustically isolated from the vehicle. The waveguide allows stress waves to propagate therethrough, and the waveguide is arranged to produce stress wave activity when the... | 11/16/1993 |
| 5107675 | Gas turbine engine A gas turbine engine of the type comprising a first compressor 4, a second compressor 6, a combustor 8 and turbines 10 for driving the compressors 4 and 6 is provided with an air intake 16, leading to the second compressor 6. The flow from the first compr... | 04/28/1992 |
| 4826645 | Method of making an integral bladed member A method of manufacturing a bladed disc from a fiber reinforced composite material which comprises injecting a mixture of short fibers and a matrix material into a dividable die so configured as to define the form of a disc having integral radially extend... | 05/02/1989 |
| 4798514 | Nozzle guide vane structure for a gas turbine engine A nozzle guide vane assembly for a gas turbine engine comprises inner and outer porous sheet metal platform rings and a plurality of aerofoils extending between the rings, each of the aerofoil portions having mounting means at its inner and outer extremit... | 01/17/1989 |
| 4673871 | Digital noise generator A digital noise generator for use in aeroengine noise testing can accurately and repeatably reproduce a standard noise spectrum so that differing noise analysis systems can be calibrated to a common standard. The noise generator comprises a pseudo-random ... | 06/16/1987 |
| 4642867 | Brush seal manufacture An apparatus for use in the manufacture of brush seals which comprise a plurality of filaments of brush material sandwiched between two sideplates. The apparatus comprises a workplate onto which is mounted one of the sideplates of the seal. A plurality of... | 02/17/1987 |
| 4638946 | Variable configuration exhaust discharge opening for a jet propulsion engine A gas turbine jet propulsion engine has a rectangular exhaust gas outlet 14. A pair of U-shaped tracks 21,22 one on each side of the outlet and which extend downstream of it, support rollers carrying the plates 24a etc. of a pair of articulated deflectors... | 01/27/1987 |
| 4628008 | Method for eliminating, or minimizing the effects of, defects in materials A method is described for the manufacture of articles in defect immunized materials in which the defects are eliminated, or broken up and oriented in such manner as to minimize their harmful effects on the article. Referring to FIG. 1e, a rotor disc for a... | 12/09/1986 |
| 4617977 | Ceramic casting mould and a method for its manufacture The present invention provides a method for manufacturing a thin-walled ceramic casting mould which is particularly suitable for casting directionally solidified articles in which rapid cooling of the cast material is required. The mould is transfer mould... | 10/21/1986 |
| 4610410 | Compound helicopter and powerplant therefor A compound helicopter shown in FIG. 1 of the drawings has wings 12 in addition to a helicopter rotor 14 and has twin powerplants 16 each including a low pressure compressor 18, a gas generator 20, a power turbine 22 driven by the gas generator and connect... | 09/09/1986 |
| 4607680 | Method and mould for casting metal articles A method for moulding multiple castings in which each mould is fed from a source of molten metal through a thin slit the width of which lies in the range 1.25 mm down to 0.25 mm. The cast articles can easily be removed from the runner and riser system aft... | 08/26/1986 |
| 4606191 | Control systems for gas turbine aeroengines A fuel control unit forms part of a control system of a gas turbine aeroengine. The control unit is in communication with a main fuel line leading to the aeroengine and comprises a fuel accumulator, i.e. volume varied by free piston, which is controllable... | 08/19/1986 |
| 4603546 | Control systems for gas turbine aeroengines Surge conditions in the compressor of a gas turbine aeroengine can be automatically controlled by a surge control system in which compressor outlet pressure is monitored and a signal P corresponding to it is processed in a surge detector to determine the ... | 08/05/1986 |
| 4604031 | Hollow fluid cooled turbine blades Hollow fluid cooled turbine blades of the multi-pass type used in gas turbine engines have suffered from separation of cooling fluid from longitudinally extending walls defining longitudinally extending passages as the cooling fluid is turned through a tu... | 08/05/1986 |
| 4602478 | Marine gas turbine power transmission A marine gas turbine engine including a fluid coupling between its low pressure turbine and power turbine. During forward drive the fluid coupling is drained so that the exhaust gases from the low pressure turbine drive the power drive in a first directio... | 07/29/1986 |
| 4598542 | Gas turbine power plant A gas turbine engine is of a size suitable for generating electrical and heat energy for domestic and other purposes. The engine has a low number of components, and some of the components are capable of performing more than one function. For example, the ... | 07/08/1986 |
| 4596460 | Optical determination of clearances Simplification in manufacture and use of an optical triangulation probe is achieved by providing it with a T-shaped optical path. The cross-bar of the T-shape extends between a light source comprising a laser diode and a light detector comprising a photod... | 06/24/1986 |
| 4593566 | Vibration monitoring in rotary machines A rotary bladed machine (10) is provided with two probes (16,17) which provide output signals upon the passage past them of the tips (15) of an annular array of rotor blades (14) mounted within the machine (10). Electrical circuitry associated with the pr... | 06/10/1986 |
| 4588954 | Apparatus for processing of pyrometer signals A circuit is provided for eliminating the effects of spurious signals from a pyrometer in a gas turbine engine. The pyrometer signal is fed to a part of the circuit (8,12,16,20,24) which produces an inverted and rate limited output signal c representative... | 05/13/1986 |
| 4586329 | Anti rotation device Those gas turbine engines which have reserver cascades covered by a translatable cowl portion when reverse thrust is not required, may undergo inadvertent translating of the cowl portion on take off or cruise with consequent disasterous results. The inven... | 05/06/1986 |
| 4584879 | Component inspection by self generated transient stress wave detection A method of inspecting a component in which the surface of the component is scanned with a loud speaker, the sonic output of which is arranged to be at such a frequency or frequencies as to cause any cracks, fractures or unbonded regions within the compon... | 04/29/1986 |
| 4582426 | Optical radiation pyrometer To be of most use as an input signal for the control system of a gas turbine aeroengine, a pyrometer-derived turbine blade temperature signal should represent the average temperature of the hottest parts of the blades with fast and accurate response when ... | 04/15/1986 |
| 4577462 | Exhaust mixing in turbofan aeroengines The core engine of a mixed exhaust turbofan aeroengine is provided with a conical afterbody. The normal outlet guide vanes which remove residual swirl from the turbine exhaust gases are dispensed with and replaced by ducts within an afterbody having entri... | 03/25/1986 |
| 4578611 | Piezoelectric stress wave transducer with boron nitride piezo support A transducer for detecting stress waves comprises a piezo-electric member which is mounted on a brass backing member and carried by a boron nitride support member. The piezo-electric member is deformed under the influence of stress waves to generate an el... | 03/25/1986 |
| 4576002 | Exhaust mixer for turbofan aeroengine The exhaust mixer can be classified as being of the multi-lobed type, with troughs between the lobes. The lobes and troughs comprise confronting pairs of flow surfaces which are twisted between their upstream and downstream ends such that a vortex flow sy... | 03/18/1986 |
| 4576001 | Gas turbine engine oil systems A gas turbine engine oil system is provided in which the centrifugal separator is arranged to act as a pump for supplying bearing chambers directly, and the scavenging of the bearing chambers is achieved primarily by the pressurization air which flows int... | 03/18/1986 |
| 4573867 | Housing for turbomachine rotors A housing for a rotor of a turbomachine comprising, radially spaced inner and outer casings. The inner casing comprises a plurality of segments 20(a) to 20(e) each of which comprises one or more stator vanes 23. A first of the casings 19 has two or more a... | 03/04/1986 |
| 4570947 | Gas sealing and fluid scavenge apparatus A hydraulic seal and an oil scavenge system are combined, and oil pumping gears and other associated equipment thus obviated. The hydraulic seal 32 comprises an oil reservoir holding centrifuged oil, and an annular fin 22, the periphery of which dips in t... | 02/18/1986 |
| 4568183 | Detection of changes in transparency of optical elements In a radiation pyrometer in a gas turbine engine, non-uniformly distributed changes in transparency of an optical element in the system, e.g. contamination of pyrometer objective lens L1 by combustion products from the turbine can be automatica... | 02/04/1986 |
| 4566270 | Gas turbine engine infra-red radiation suppressor A gas turbine engine infra-red radiation suppressor comprising an exhaust nozzle which is surrounded by a duct having a plurality of diffuser vanes at its downstream end. The exhaust nozzle and duct constitute an ejector which is powered by the exhaust ef... | 01/28/1986 |
| 4561491 | Investment casting A method of manufacturing a mould for use in the investment casting of a hollow gas turbine engine blade in which a ceramic core is coated with a surface modifying material prior to the application of wax thereto to define a pattern of the object to be ca... | 12/31/1985 |
| 4561257 | Gas turbine engine combustion apparatus A gas turbine engine combustion apparatus for vaporizing fuel comprises a flame tube having an upstream end wall in which are located a number of flow guides having associated fuel ducts. In operation, fuel and air flow through the U-shaped duct in each g... | 12/31/1985 |
| 4562033 | Method of manufacturing articles from a composite material A method of vacuum moulding a composite material in which laid-up prepregs uncured resin and reinforcing filaments are placed on a heated former and covered with a sheet of a microporous film material a breather material and an impermeable membrane. The v... | 12/31/1985 |
| 4559246 | Method of increasing the wettability of a surface by a molten metal A method of treating filaments in order to increase their wettability by molten magnesium or an alloy thereof. The filaments are treated by coating them with particulate molybdenum trioxide, chromic oxide, ferric oxide or nickel oxide and subsequently inf... | 12/17/1985 |
| 4552197 | Mould assembly for casting metal articles and a method of manufacture thereof The invention relates to a mould assembly including a plurality of individual moulds. The mould assembly of the present invention is made by separately transfer moulding a starter base 16, a plurality of moulds 12, a downpole 14 and pouring cup 19, provid... | 11/12/1985 |
| 4552198 | Removing refractory material from components A method of removing refractory material from a component comprises contacting the refractory material with a chemically active agent whereby to convert the refractory material to a more easily removable substance, and removing the more easily removable s... | 11/12/1985 |
| 4551064 | Turbine shroud and turbine shroud assembly To enable shroud segments in a gas turbine rotor blade stage to operate at high temperatures with an adequate margin of safety, the shroud segments are mounted and cooled such that they are thrust outwards against seatings on surrounding high strength sup... | 11/05/1985 |
| 4551062 | Device for passing a fluid flow through a barrier A device is provided for passing a fluid flow across a static or rotating barrier wherein there is relative rotation between the flow and the barrier and wherein it is necessary to pass the maximum of flow through the device while keeping the diameter of ... | 11/05/1985 |
