| Patent Number |
Title Of Patent |
Date Issued |
| 4989404 |
Turbine engine with high efficiency fuel atomization |
February 5, 1991 |
| Improved fuel atomization for turbine engines operating at low fuel flows and at high altitudes is accomplished in an engine having an annular combustor 26 by utilizing fuel injectors 46 provided with radially inward discharge orifices 56 and planar impingement surfaces 60 within the pat |
| 4989403 |
Surge protected gas turbine engine for providing variable bleed air flow |
February 5, 1991 |
| Surge protection is achieved in a turbine engine intended to provide varying quantities of bleed air and having two compressor stages 48, 36 by providing the inlet 56 of the first stage 48 with variable inlet guide vanes 58, 60. The first stage compressor 48 is a high specific speed, |
| 4987795 |
Vented transmission |
January 29, 1991 |
| The difficulty of venting oil from a transmission with the venting of gas therefrom is avoided in a vented transmission construction including a housing (10), a rotary input (12) to the housing (10), a rotary output (46) from the housing (10), and a transmission (24, 26, 28, 30, 32, 44, |
| 4987328 |
Rotating rectifier in brazed assembly |
January 22, 1991 |
| The problem of assembling and maintaining good electrical contact in a rotating rectifier assembly (40) is solved using brazed connections. The rectifier assembly (40) includes three planar, tear-shaped copper phase plates (62) which are equally angularly spaced about an axis (68) in a |
| 4986734 |
Overspeed protection system for aircraft fan engine |
January 22, 1991 |
| An overspeed protection system for an aircraft fan engine wherein blades are rotatable from a coarse pitch to a fine pitch to a thrust-reverse condition. A wobbler-type hydraulic motor is provided for rotating the blade. An overspeed governor is operatively associated with the motor for |
| 4985752 |
Hermetically sealed compression bonded circuit assembly having a suspension for compression bond |
January 15, 1991 |
| A harmetically sealed circuit assembly (10) containing a plurality of circuit elements (74, 76 and 80) which are to be compression bonded upon application of a force through opposed first and second walls (12, 20) of a hermetically sealed chamber containing the circuit elements to be |
| 4985142 |
Quick release filter by-pass valve |
January 15, 1991 |
| In order to facilitate release of a filter by-pass valve (10) for filter element replacement in relatively inaccessible locations, the valve (10) includes a housing (12) defining a filter chamber (14) having an inlet (16) communicating with the filter chamber (14) at one end (18) of the |
| 4984625 |
Demisting screen arrangement for two-phase thermal management system |
January 15, 1991 |
| An improved demisting screen arrangement utilized in a rotary fluid management device (13) of a two-phase thermal management system (1) employs a multi-layered annular screen (34) held in a casing (52) to define a space (54) on the downstream side of the screen (34). The arrangement |
| 4984473 |
Torque monitor |
January 15, 1991 |
| Reliability problems in a torque monitor are reduced in a simplified construction including a housing (30) journalling first and second coaxial shafts (34), (42). The second shaft (42) is mounted for axial movement within the housing (30), and a sleeve (58) has a threaded connection (56) |
| 4984424 |
Fuel injection system for a turbine engine |
January 15, 1991 |
| The components of a fuel injection system for a turbine engine 10 and provided with a purging system are reduced by utilizing a construction including a main control valve 24, at least one start fuel line 46 connected to a start injector 50, a plurality of main fuel lines 51 connecte |
| 4983902 |
Fast current discharging switch for a variable reluctance motor drive |
January 8, 1991 |
| A circuit (40) for controlling a variable reluctance motor in accordance with the invention includes a first switch (Q1) having first and second electrodes, the first electrode being connectable to a first potential (14) of a DC power supply (12) and the second electrode being connected |
| 4983869 |
Magnetic bearing |
January 8, 1991 |
| A magnetic bearing (10) in accordance with the invention includes a rotatably supported member (14) having a cylindrical magnet (12) with first and second ends which respectively are first and second magnetic poles with a magnetic field produced by the magnet having a uniform strengt |
| 4983141 |
Constant velocity joint for hydraulic actuator in an airframe |
January 8, 1991 |
| A constant velocity joint (10) rotationally connecting rotationally mounted first and second members (12 and 14) together each having an axis of rotation (16 and 18) in accordance with the invention and includes at least one axial bore (42) within the first shaft offset from and parallel |
| 4983099 |
Torque-velocity control for variable displacement hydraulic motor |
January 8, 1991 |
| A control for a variable displacement hydraulic motor (12) is disclosed. The control includes an electrically controlled hydraulic servo valve (14) for controlling displacement of the hydraulic motor for varying position of a wobbler (28) in response to a servo valve control signal (92); |
| 4981018 |
Compressor shroud air bleed passages |
January 1, 1991 |
| A narrow efficient operating island for a centrifugal compressor may be increased in a construction including a compressor section 18 mounting blades 22 surrounded by an annular shroud 38 by placing bleed passages 88 in the shroud 38 and angling them in the direction of flow, both axiall |
| 4979362 |
Aircraft engine starting and emergency power generating system |
December 25, 1990 |
| The problem of excessive weight in an aircraft 10 powered by at least one turbine engine 12 as a result of the incorporation of both a starter for the turbine engine 12 and a source of emergency power is avoided by utilizing a turbine wheel 62 to alternatively start the engine 12 or driv |
| 4979090 |
Power converter circuit board |
December 18, 1990 |
| Prior power converters have utilized discrete components mounted on circuit boards of different design. Failure of one or more of the components requires the components to be separately tested to determine which is faulty. The faulty component or the board containing same must then be |
| 4978279 |
Simplified inlet guide vane construction for a rotary compressor |
December 18, 1990 |
| The expense of variable inlet guide vane structure for rotary compressors is avoided in a structure including a compressor housing 20 with an inlet end 24 and a rotor 10 journaled within the housing 20 by disposing a housing 42 about the inlet end 24 and having an inlet port 54 over a mi |
| 4977492 |
Suppression of switching harmonics |
December 11, 1990 |
| An inverter controller adjusts a selected switching pattern to accommodate minor variations and loads in the neighborhood of that pattern. The controller realizes in real-time the equivalent of an iterative solution of predetermined patterns. A number of representative pulse width mo |
| 4977332 |
Power switching apparatus |
December 11, 1990 |
| A power switching apparatus is provided with a plurality of power switching elements in which each power switching element is configured to receive an input signal, a carry-in signal and two partial duty cycle signals. The power switching element is also configured to provide an output s |
| 4975825 |
Stacked power converter |
December 4, 1990 |
| A power converter comprises a plurality of modular circuit boards assembled in a stacked relationship. The circuit boards include heat exchangers which are interconnected and cooling fluid is provided thereto to remove heat generated by high power devices. |
| 4975824 |
Power converter circuit board |
December 4, 1990 |
| Prior power converters have utilized discrete components mounted on circuit boards of different design. Failure of one or more of the components requires the components to be separately tested to determine which is faulty. The faulty component or the board containing same must then be |
| 4975803 |
Cold plane system for cooling electronic circuit components |
December 4, 1990 |
| The problem is dissipating heat from electronic circuit components is solved by a cold plane system which includes a generally flat housing (10) having a closed interior cavity and a generally flat exterior surface (16a) on which the electronic circuit components (12) are mountable. A |
| 4975670 |
Air cooled transformer |
December 4, 1990 |
| A variable speed, constant frequency generating system has a neutral forming autotransformer connected between a variable speed generator and an AC to AC converter. The converter includes a three phase, full wave rectifier with positive and negative rails connecting the rectifiers with |
| 4974415 |
Staged, coaxial multiple point fuel injection in a hot gas generator |
December 4, 1990 |
| Improved performance in a hot gas generator is achieved by disposing a dual fuel injector 42 having spaced fuel discharge ports 48, 60 on the longitudinal axis 28 of a vessel 18 having a narrow inlet 22, an opposite narrow outlet 14 and an intermediate, enlarged chamber 24 which serves a |
| 4973902 |
Fault detector for aircraft variable speed, constant frequency power supply |
November 27, 1990 |
| A variable speed, constant frequency aircraft power system uses current sensing diodes to rectify the power generator output. The current flow through pairs of diodes is compared to generate phase currents to detect feeder faults. |
| 4973899 |
Current sensor and method utilizing multiple layers of thin film magneto-optic material and sign |
November 27, 1990 |
| A sensor (1) for sensing the magnitude of current flowing in a conductor (12) based upon the Faraday effect. The sensor (10) includes a light source (14) for emitting a beam of light which is transmitted through the magneto-optic material (28) with one or more layers which causes a r |
| 4971104 |
Self powered servo actuated backpressure regulating valve |
November 20, 1990 |
| A self-powered servo-actuated backpressure regulating valve including a valve housing (1) having an inlet port (2) and an outlet port (3). A valve plate (4) is disposed in the housing (1) and supported by an evacuated chamber (12) defined by a bellows (10) so as to be movable toward and |
| 4970866 |
Magneto caloric system |
November 20, 1990 |
| In this magneto caloric heat transfer system the working material comprises paramagnetic particles suspended in a fluid which circulates continuously in a closed loop path between a region of high magnetic intensity field and a region of low magnetic field intensity. |
| 4970865 |
Spray nozzle |
November 20, 1990 |
| A spray nozzle including a body having a fluid inlet at one end thereof and an exit orifice at the other end thereof. The fluid inlet communicates with the exit orifice through a fluid flow path extending through the body. The exit orifice is adapted to atomize the fluid as the fluid lea |
| 4970635 |
Inverter with proportional base drive controlled by a current transformer |
November 13, 1990 |
| An inverter in accordance with the present invention includes a plurality of bipolar transistors (102) with each bipolar transistor having a freewheeling diode (108) poled in parallel with outputs of the bipolar transistor, a current transformer (112) in a positive feedback circuit ( |
| 4969081 |
Inverter switch current sensor with shoot-through current limiting |
November 6, 1990 |
| The problem of sensing current through inverter switches is solved by a current transformer which has windings connected with the flyback diodes to demagnetize or reset the current transformer core. Size and weight of the transformer are minimized while avoiding a buildup of flux which w |
| 4968926 |
Power conversion system with stepped waveform DC to AC converter having prime mover start capabi |
November 6, 1990 |
| A power conversion system is operable in a generating mode to convert motive power developed by a prime mover into electrical power and in a starting mode to convert electrical power developed by a source of AC power into motive power for starting the prime mover. The system includes |
| 4968912 |
Single piece punched and bent neutral lead |
November 6, 1990 |
| The problem of effectively and quickly detecting fault conditions in an electromotive machine (10) is solved using a current transformer assembly (28) having a neutral lead (44). The neutral lead (44) comprises a single piece copper strap (80) having laterally extending strips or posts ( |
| 4968219 |
Multi-stage compressor with seal heating |
November 6, 1990 |
| A sleeve seal heating system for a multi-stage compressor is disclosed. The multi-stage compressor includes a mechanism for dissipating heat disposed between and in fluid communication with a pair of compressor stages in the multi-stage compressor. The present invention contemplates the |
| 4967886 |
Dual function brake and manual drive actuating system |
November 6, 1990 |
| A dual function brake and manual drive actuating system for selectively holding a rotatable member of a drive train and manually driving the drive train. A support structure is provided, with a brake operatively associated between the support structure and the rotatable member for ho |
| 4967563 |
Turbine engine with high efficiency fuel atomization |
November 6, 1990 |
| Excellent fuel atomization in a turbine engine may be obtained with fuel injectors 46 including elongated, laminar discharge orifices 72 and impingement surfaces 76 disposed in the path of fuel 78 being discharged through the discharge orifices 72. Preferably, the fuel 78 is discharged |
| 4967562 |
Turbine engine with high efficiency fuel atomization |
November 6, 1990 |
| Excellent fuel atomization in a turbine engine may be obtained with fuel injectors 46, 47 including elongated, laminar discharge orifices 72, 100 and impingement surfaces 76, 102 disposed in the path of fuel 78, 106 being discharged through the discharge orifices 72, 100. Preferably, the |
| 4967551 |
Turbine engine |
November 6, 1990 |
| A turbine engine including a rotary compressor 10 to be driven by a turbine wheel 12 and provided with an annular combustor 36 including an outlet 44 whereby gases of combustion may be directed to a nozzle 46 to be directed against the turbine wheel 12 to drive the same. Fuel injectors e |
| 4967334 |
Inverter input/output filter system |
October 30, 1990 |
| A filter system for removing selected frequencies from AC power provided on at least two phase lines and a neutral line includes a phase-to-phase filter for removing a first selected AC component at a first frequency from the AC power wherein the frequency component has a line-to-phase |
| 4967132 |
VSCF start system current estimator |
October 30, 1990 |
| The problem of excess size and weight resulting from the use of current sensors in a VSCF start system is solved by a motor control system which utilizes a current estimator to develop a current feedback value. The current estimator is coupled to a rotor position detector and an input |
| 4967122 |
Digital synchronizing circuit for brushless DC motor |
October 30, 1990 |
| An acceleration system (10) for a brushless DC motor (12) is disclosed having the functional capability of rapid acceleration through one or more mechanical resonance points with electronic commutation of the windings being controlled by pulses generated by sensing the position and r |
| 4967096 |
Cross-start bus configuration for a variable speed constant frequency electric power system |
October 30, 1990 |
| This invention relates to a bus configuration for a dual channel variable speed constant frequency motor/generator aircraft power system providing for both power generation and engine starting. The subject invention provides for isolation of faults which can occur in long power feeders. |
| 4966067 |
Involute cam actuator with piston drive |
October 30, 1990 |
| A mechanism for converting linear displacement of a piston to angular displacement of a shaft by positioning a cam in a recess of a unitary piston which is adapted for positioning by differential fluid forces applied to opposite ends of the piston. To provide a linear displacement dr |
| 4965995 |
Power unit with stored energy |
October 30, 1990 |
| The weight of a high pressure storage vessel 20 for an oxidant used to oxidize fuel in a combustor 12 which in turn provides gases of combustion to a turbine wheel 10 may be minimized by providing an incendiary device 32 within the vessel 20 which is triggered by a sensor 34, 36 in respo |
| 4965477 |
Integrated drive generator with permanent magnet generator on second shaft |
October 23, 1990 |
| An integrated drive generator (40) for generating constant frequency alternating current which is driven by a drive shaft (12) at variable rotational speeds includes an alternating current generator (23) having a rotor (37) mounted on a first shaft (42), which is driven by an output of |
| 4964790 |
Automatic regulation of balancing pressure in a screw compressor |
October 23, 1990 |
| A system and method are provided for the automatic regulation of a balancing pressure to be applied to a rotor of a rotary screw compressor. The system includes a microprocessor which computes a balancing pressure to be applied to the rotor in response to an input of various compressor |
| 4964027 |
High efficiency power generating system |
October 16, 1990 |
| A power generating system (10) in accordance with the present invention includes a converter (14) for producing an AC output (16) including a fundamental and at least one harmonic of the fundamental; a frequency analyzer (18), having at least one input coupled to the AC output, for p |
| 4963976 |
Integrated electrical conducting, cooling and clamping assembly for power semiconductors |
October 16, 1990 |
| A multiple phase electronic semiconductor package 10 including a stack of electrically conductive plates 12 with two opposed clamping plates 14, at least one interposed semiconductor component 16 and two side plates 18 flanking the stack. The height of the side plates 18 is a predetermin |
| 4962829 |
Oil management tank system |
October 16, 1990 |
| An oil management system (80) for a case (12) containing at least one rotating element which requires a supply of pressurized oil during rotation in accordance with the invention includes an oil sump (16) within the case for collecting oil after lubrication of the at least one rotating |
