Quotables
"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 6291878 | Package for multiple high power electrical components A semiconductor package includes a plurality of semiconductor devices disposed in an array surrounding a central electrode structure carried by a package support member. The package is capable of withstanding high voltages and currents and includes a heat... | 09/18/2001 |
| 6196361 | Compact electric asymmetry brake An improved braking apparatus having a jaw type clutch coupled to an electrical solenoid through a ball spline mechanism provides significantly greater braking capacity in a given volume than other types of braking devices. The ball spline is configured t... | 03/06/2001 |
| 6152215 | High intensity cooler A high intensity cooling device is disclosed. The cooling device includes first and second superimposed laminations, with each of the laminations including a cavity having a spiral fin defining a spiral flow chamber. One of the flow chambers directs a coo... | 11/28/2000 |
| 6141219 | Modular power electronics die having integrated cooling apparatus A power electronics device incorporating a modular packaging concept and having an integrated device cooler is disclosed. A modular power electronics die cooler is designed for use with a coolant manifold adapted to circulate a coolant medium past a mount... | 10/31/2000 |
| 6118362 | Integrated inductive assembly An integrated inductive assembly includes first and second inductive elements each comprising a winding wherein winding axes of the windings are perpendicular to one another. In addition, the first and second inductive elements are carried adjacent one an... | 09/12/2000 |
| 6059537 | Aircraft fuel pump with centrifugal pump and regenerative pump stages A fuel pressurization and pumping system for use in a turbine powered aircraft or the like makes use of the advantages of centrifugal pumps, even in a high pressure mode and includes a centrifugal volute pump (24) having a fuel inlet (28) and fuel outlet ... | 05/09/2000 |
| 6057619 | Stress relief in a magnetic thrust bearing Undesirably high stresses are minimized in a magnetic thrust bearing (15) having a disc (52) mounted on a shaft (54). The disc (52) is flanked on both sides (60,62) by respective armatures (68,70) which act to apply a magnetic field to the disc (52) to lo... | 05/02/2000 |
| 6022197 | Aircraft pump system with internal pressure control, comprising a regenerative pump and a centrifugal pump Difficulties in adapting centrifugal pumps for use as fuel pumps for turbine powered aircraft are avoided in a system including a centrifugal volute pump (22) on a common shaft (18) with a regenerative pump (24). A pressure responsive throttling valve (46... | 02/08/2000 |
| 6018233 | Redundant starting/generating system A power conversion system allows for redundant starting and generating functions and eliminates equipment normally found in a conventional system so that size and weight are reduced.... | 01/25/2000 |
| 6016739 | Piston and method for reducing wear This invention relates to a piston for reciprocating and simultaneously rotating through a predetermined length of movement within a piston bore having a piston bore surface, and a method for reducing wear on a piston bore surface operatively associated w... | 01/25/2000 |
| 6006776 | Integrated drive generator recirculation valve with feedback control A fluid circulation system in accordance with the invention includes a first fluid utilizing device (12) requiring a minimum fluid flow having an input (14) for receiving the minimum flow and an output (16) for discharging fluid received from the input; a... | 12/28/1999 |
| 6008558 | L-shaped magnetic thrust bearing An electromagnetic thrust bearing having reduced windage losses, improved structural integrity, and enhanced electromagnetic flux density. The present invention provides an electromagnetic thrust bearing having a first annular stator segment and a second ... | 12/28/1999 |
| 6007311 | High speed self-lubricated fuel pump with hydrostatic bearings The weight and volume of a centrifugal fuel pump ideally suited for use in a fuel system for a turbine engine (12) may be reduced in a construction including a single shaft (10) mounting an inducing impeller (18), an impeller (22) for a regenerative pump,... | 12/28/1999 |
| 5994804 | Air cooled dynamoelectric machine The hydraulic components of a cooling circuit for a dynamoelectric machine are eliminated in a totally air cooled dynamoelectric machine which includes a rotor (12) rotatable about an axis (14) and including a central stack (20) of ferrous laminations (22... | 11/30/1999 |
| 5986366 | Rotor for a dynamoelectric machine A rotor (10) is provided for a dynamoelectric machine. The rotor (10) includes a rotor shaft (12) and a laminated core (14). The rotor shaft (12) is adapted to mount the rotor (10) for rotation about an axis (13) of rotation in a dynamoelectric machine. T... | 11/16/1999 |
| 5977648 | Hydraulically driven low reactance, large air gap permanent magnet generator and voltage regulation system for use therewith An electric power generating system comprises a low reactance, large airgap permanent magnet generator driven by a hydraulic motor to generate a poly-phase AC output voltage. Because the permanent magnet generator is a low reluctance, large airgap machine... | 11/02/1999 |
| 5977645 | Aircraft secondary power system A secondary power system for an aircraft utilizes a variable frequency electrical distribution system that provides power to one or more loads that can tolerate distortion components. In addition, a DC distribution system is coupled to the variable freque... | 11/02/1999 |
| 5971798 | Quick release power connector An electrical power connection module adapted to indicate when a weld between a pin and a socket has occurred. The present invention provides a multiple pin plug wherein each pin mounted in the plug is attached thereto using a spring means. The biasing me... | 10/26/1999 |
| 5969452 | Magnetic bearing construction A magnetic bearing (10) is provided for supporting a rotor (12) for rotation about an axis (14). The magnetic bearing (10) includes a plurality of actuator cores (16) spaced circumferentially about the axis (14), and a plurality of non-magnetic spacers (1... | 10/19/1999 |
| 5956960 | Multiple mode environmental control system for pressurized aircraft cabin The need for engine bleed air in a cabin pressurizing/ventilation ECS system for aircraft is avoided in a construction including a pressurizable aircraft cabin (10) having a cabin air inlet (20) and a cabin air outlet (22). The system includes a ram air i... | 09/28/1999 |
| 5950774 | Load limiter A load limiter for preventing stall torque from being transmitted from a power drive unit to the flight control surfaces of an aircraft. The present invention provides such a load limiter in a package having lower weight and smaller spacial requirements t... | 09/14/1999 |
| 5953220 | System and method for zero phase error tracking of reference in PWM inverters In an inverting system, a reference VREF is coupled to an input of a predictor. The predictor has an output VP and a transfer function TP. An inverter of the inverting system has a pulse width modulator, a filter, and a tr... | 09/14/1999 |
| 5950714 | Cooling apparatus for an electronic component This invention relates to a cooling apparatus for at least one electronic component. The cooling apparatus includes a first member which has an inner surface and an outer surface. The outer surface of the first member is adapted for mounting the electroni... | 09/14/1999 |
| 5943942 | Copper-based alloy casting process A cost-effective process for providing a copper-based alloy casting, which has superior wear characteristics, to a cylinder block is described. The process includes providing a negative pressure around the cylinder block and a copper-based alloy. The proc... | 08/31/1999 |
| 5936386 | Method of linearizing the performance of switched reluctance generators A method of linearizing the output performance of a switched reluctance generator, comprises the steps of exciting the switched reluctance generator during a first phase of operation at a turn-on angle which need not be accurately calculated to produce th... | 08/10/1999 |
| 5930134 | Starting system for a prime mover A starting system for a prime mover coupled to a generator includes a step-up inverter which converts DC power at a first voltage into AC power at a second, higher voltage. Halfwave pulses in the AC power are selectively applied to the generator by a puls... | 07/27/1999 |
| 5929537 | PMG main engine starter/generator system A starting/generating system for a small aircraft having engines which can be battery started includes a permanent magnet generator (PMG) which can directly supply frequency-insensitive loads and a power converter for developing regulated DC power from th... | 07/27/1999 |
| 5927066 | Turbine including a stored energy combustor In a gas turbine engine having gaseous oxidant delivered to a turbine from a source such as a pressurized bottle via a conduit or duct, a compact annular combustor is provided which offers enhanced performance through incorporation of means for uniformly ... | 07/27/1999 |
| 5925481 | Thermally activated electrical cell A thermal battery (10) includes a heat source (16) fabricated from a combination of metallic lithium and a predominantly fluorine substituted hydrocarbon (PFSH) material. In some embodiments the thermal battery (10) includes a combination anode/heat sourc... | 07/20/1999 |
| 5920162 | Position control using variable exciter feed through A motor generator system in accordance with the invention includes a prime mover (21) for driving an output shaft (18); a main motor generator (16, 105), having a rotor driven by the output shaft, for producing electrical power on a plurality of stator ph... | 07/06/1999 |
| 5920175 | Instantaneous position indicating apparatus for a sensorless switched reluctance machine system A sensorless control for operating an inverter coupled to a switched reluctance machine includes an instantaneous position generation circuit that develops a signal for controlling commutation of the switched reluctance machine. The instantaneous position... | 07/06/1999 |
| 5918836 | Aircraft spoiler blow-down mechanism An electrical mechanical blow-down mechanism for use with an aircraft spoiler avoids possible damage due to high inertial loading when a power failure occurs as the spoiler (10) is moving toward or is at an extended position by means of a structure includ... | 07/06/1999 |
| 5917401 | Conductive bus member and method of fabricating same A conductive bus member operable over a selected operating frequency range includes a cylindrical main body and first and second legs secured to the main body at first and second points whereby first and second current paths having first and second impeda... | 06/29/1999 |
| 5911388 | Environmental control system with energy recovery and bleed air assist The bleed air requirements for a pressurization and environmental control system for the cabin (10) of an aircraft may be reduced by a system that includes a turbomachine (20) having a rotary compressor (22) driven by a turbine wheel (26). A ram air inlet... | 06/15/1999 |
| 5911788 | Compliant gear A radially compliant gear is provided to reduce transmitted shock loads and/or resist jamming as a result of debris entering its mesh with another gear. The radially compliant gear includes a hub adapted to rotate about an axis, and a compliant rim. The h... | 06/15/1999 |
| 5910746 | Gate drive for a power switching device A drive circuit for a voltage controlled power switching device includes a transformer, a full-wave rectifier bridge coupled to the transformer, first and second capacitors connected in series between nodes of the full-wave rectifier bridge and first and ... | 06/08/1999 |
| 5901609 | Method and apparatus for a low friction safelock system A safelock system for removable gears is provided having a self-seating gear segment rotatably mounted on a helical ball spline for bi-directional axial movement with respect to the gear teeth to be locked. A relubrication structure is provided to service... | 05/11/1999 |
| 5899411 | Aircraft electrical system providing emergency power and electric starting of propulsion engines An aircraft is provided that includes one or more engines, an air-driven generator, and a start-circuit for operably connecting an electrical output of the air driven generator for starting one or more of the engines while the aircraft is in flight. Vario... | 05/04/1999 |
| 5899265 | Reflux cooler coupled with heat pipes to enhance load-sharing A heat exchanger for aircraft electronics. The present invention provides a plurality of reflux coolers wherein each reflux cooler is primarily dedicated to cooling a specific electronic component, such as one phase of a multiphase device. The reflux cool... | 05/04/1999 |
| 5880571 | Method of and system for controlling a variable speed induction motor A method of and system for controlling an induction motor detects input frequency to the motor and connects windings of the motor in one of a plurality of configurations in dependence upon the detected frequency.... | 03/09/1999 |
