| Patent Number |
Title Of Patent |
Date Issued |
| 4901746 |
Anticipating overspeed governor |
February 20, 1990 |
| A speed responsive control device is useful for preventing a dangerous overspeed condition of a propulsor. The device begins governing before the dangerous overspeed condition occurs through the use of an acceleration responsive mechanism which actuates the spool of a governor pilot valv |
| 4901524 |
Staged, coaxial, multiple point fuel injection in a hot gas generator |
February 20, 1990 |
| Improved performance in a hot gas generator is achieved by disposing a multiple port fuel injector 42 having three spaced fuel discharge ports 46, 48, 49 on the longitudinal axis 28 of a vessel 18 having a narrow inlet 22, an opposite narrow outlet 14 and an intermediate, enlarged ch |
| 4901201 |
Plate fin/chic heat exchanger |
February 13, 1990 |
| Electrical devices which generate different amounts of heat are selectively cooled with a heat exchanger having a first portion formed of a fin-type heat exchanger and a second portion formed of a compact high intensity cooler wherein a jet impingement cooling mechanism is employed. Cool |
| 4901015 |
Ambient electromagnetic field compensating magnetic pick-up circuit for integrated drive generat |
February 13, 1990 |
| This invention relates to a magnetic pick-up circuit for use in integrated drive generators of the type employed on board aircraft for power generation. Prior art magnetic pick-up circuits failed to compensate for interference due to operation within an ambient electromagnetic field or |
| 4900233 |
Reciprocating compressor providing a lubricant free compressed gas |
February 13, 1990 |
| The presence of a lubricant in compressed gas from a reciprocating compressor including at least one cylinder 76 reciprocally receiving a piston 74 mounted on a rod 60 and connected to a rotary shaft 12 by a rotary to reciprocating motion converting mechanism 44 is avoided by placing |
| 4899538 |
Hot gas generator |
February 13, 1990 |
| Carbon build-up in a hot gas generator is avoided in a construction including a vessel 24 having a narrow inlet end 26, a narrow outlet end 28 and an intermediate, relatively wide, combustion chamber 30 by either disposing a heat shield 50 on the interior surface 48 of the combustion |
| 4899536 |
Starting system for a turbine engine |
February 13, 1990 |
| Difficulties in starting turbine engines 10 at high altitudes are avoided in a starting system which includes a combustor 34 having a gas outlet 32 adapted to be in communication with a turbine engine nozzle 28, a fuel inlet 36, and an oxidant inlet 38 so that fuel may be oxidized within |
| 4898265 |
Torque limiter |
February 6, 1990 |
| A torque limiter which includes an input shaft and an output shaft coaxial with the input shaft. A ball ramp torque transmitting device is disposed concentrically relative to the shafts. A first spring is axially disposed of the ball ramp device for normally preloading the device. A fric |
| 4897994 |
Method of starting turbine engines |
February 6, 1990 |
| The turbine engine may be started without the use of start injectors by a method including the steps of initiating rotation of a compressor and turbine wheel by applying an external angular accelerating force thereto, introducing fuel through a minority of the fuel injectors employed at |
| 4897583 |
Variable speed variable torque brushless DC motor |
January 30, 1990 |
| A variable speed variable torque brushless DC motor (32) having at least one position sensor (34) with each position sensor producing a position signal indicating position of the rotor and having a frequency equal to a frequency of excitation current applied for activating stator winding |
| 4896507 |
Solar power system |
January 30, 1990 |
| A solar power system includes a solar concentrator and a power conversion unit for converting direct solar energy from the concentrator to electrical energy to power appropriate loads. The power conversion unit operates through the medium of a working fluid, such as a turbo-generator. |
| 4895219 |
Fill valve for liquid containing device |
January 23, 1990 |
| A device (1) for use in conjunction with an engine (25) is adapted to contain a predetermined level (A) of a liquid such as oil therein. A fill passage (4) is provided for adding liquid to the device and a drain passage (7) is provided for draining liquid from the device when the liq |
| 4895192 |
Process and apparatus for filling a constant speed drive |
January 23, 1990 |
| A service valve (10) is provided to provide an apparatus and method for filling a constant speed drive without overfilling and for preventing gas entrapment in the oil circuit of the drive. The valve (10) has a spool (12) movable in response to pressure from a filling fluid so as to conn |
| 4892360 |
Brake activation apparatus and power drive unit therefor |
January 9, 1990 |
| The brake activation apparatus comprises first and second brake devices capable of being selectively applied, a shifting mechanism for selectively applying either the first or second brake device and not the other, a mechanism for overriding the shifting mechanism for applying both of th |
| 4891942 |
Hydraulically powered actuator for maintaining a member under preload |
January 9, 1990 |
| A hydraulically powered actuator (16) for moving a member (28 or 30) into and away from a position at which the member is under a preload is disclosed. A hydraulically powered motor (22) is utilized which is coupled to the member for moving the member to and from the position at which th |
| 4891936 |
Turbine combustor with tangential fuel injection and bender jets |
January 9, 1990 |
| The cost of fuel injection nozzles 50 and their tendency to clog in a gas turbine having an annular combustor 26 can be reduced by alternating the fuel injection nozzles 50 with bender jets 56 configured to introduce a combustion supporting gas into an annular combustion zone 40 at locat |
| 4891532 |
Darlington connected switch having base drive with active turn-off |
January 2, 1990 |
| A Darlington connected switching circuit (20) having a bipolar driver transistor (22) and at least one driven transistor (24) having a rapid and reliable turn-off characteristic with low losses suitable for use in power applications such as inverters. The collector to emitter potential o |
| 4890979 |
No-back apparatus for propeller pitch control |
January 2, 1990 |
| An improved no-back mechanism for propeller pitch control comprises a brake which resists motion of a first member and a uni-directional coupling between the first member and a drive connecting a pitch control prime mover to an adjustable pitch propeller. The coupling permits limited |
| 4890702 |
Brake or clutch assembly |
January 2, 1990 |
| A brake or clutch assembly including a drum (18) and a transfer tube (36) for supplying hydraulic fluid to the drum (18). The transfer tube (36) includes a ring-like seal (59) for sealingly engaging the interface between the transfer tube (36) and the drum (18). A resilient O-ring (62), |
| 4888493 |
Speed trimming integrated drive generator |
December 19, 1989 |
| A speed trimming integrated drive generator 18 includes a differential 24 having inputs coupled to a prime mover 20 and to a wild frequency generator 48, the output thereof being coupled to a main generator 14. In order to control main generator speed, and thus the frequency of the power |
| 4887490 |
Sequential mechanical mode shifter |
December 19, 1989 |
| An improved system (10 and 100) is disclosed in which a plurality of actuation systems (12 and 14) are activated in a timed sequence by a single prime mover (16). The prime mover is coupled to a transmission (18) which drives the first and second actuation systems for moving the first |
| 4887479 |
Ball cage for helical ballspline |
December 19, 1989 |
| A ball cage for a helical ballspline of a mechanical movement device comprises a cage in the form of a tubular sleeve adapted to be arranged between a helically threaded inner member and a complimentary helically threaded outer member of the helical ballspline. The inner and outer me |
| 4886530 |
Single stage pump and separator for two phase gas and liquid mixtures |
December 12, 1989 |
| Difficulties in pumping mixtures of gases and liquids are avoided in a rotary machine which both pumps and separates the mixture and which includes a generally tubular, elongated pump housing 10 having a suction inlet 22 at one end, a first outlet 32 for gas at the other end, and a s |
| 4886417 |
Fuel pump and radial-flow impeller therefor |
December 12, 1989 |
| A single stage centrifugal fuel pump which can provide a large range of flow, 1 to 300 gpm, while maintaining low flow, high speed operation with pressure instability at minimum values comprises a radial-flow impeller having a front shroud and a discharge for discharging fuel from the |
| 4885909 |
Method of operating a multipurpose auxiliary power unit |
December 12, 1989 |
| A single gas turbine may be made alternately useable as an auxiliary power unit, a load compressor, an air turbine starter, or an air turbine starter motor by placing a selectively operable clutch 38 between a centrifugal compressor 10 and a turbine wheel 30, by placing a valve 58 in duc |
| 4883148 |
Fill valve for liquid containing device |
November 28, 1989 |
| A device (1) for use in conjunction with an engine (25) is adapted to contain a predetermined level (A) of a liquid such as oil therein. A fill passage (4) is provided for adding liquid to the device and a drain passage (7) is provided for draining liquid from the device when the liq |
| 4883117 |
Swirl flow heat exchanger with reverse spiral configuration |
November 28, 1989 |
| A heat exchanger is provided with a first conduit which utilizes a reverse spiral concept and a second fluid conduit which directs a fluid in thermal communication with the first conduit. One of the fluid conduits of the heat exchanger is formed with a generally S-shaped portion which cr |
| 4882513 |
Dual permanent magnet generator |
November 21, 1989 |
| The effects of operational loading on a permanent magnet generator of the type having first and second permanent magnet assemblies 28, 30 mounted on a shaft 26, and movable relative to each other is eliminated by rotatably mounting each of the assemblies 28, 30 for rotation relative to t |
| 4882120 |
DC content control for an inverter |
November 21, 1989 |
| Power inverters for converting DC power into AC power often produce a DC component in the inverter output which is objectionable. In order to overcome this problem, an inverter control according to the present invention detects the magnitude of the DC component in the inverter AC out |
| 4881001 |
Stator laminate retainer assembly |
November 14, 1989 |
| In a dynamoelectric machine, a stator assembly is mounted directly in a bore of a housing for surrounding a rotor. The bore has an axially extending slot. The stator assembly includes a plurality of laminations bonded together in a stacked array for circumferentially surrounding the |
| 4880352 |
Centrifugal liquid pump |
November 14, 1989 |
| A centrifugal liquid pump including a housing section having an intake cavity and defining a rotational axis of the pump. An impeller section is in communication with and extends coaxially of the intake cavity of the housing section. An impeller is mounted in the impeller section rotatab |
| 4880055 |
Impingement plate type heat exchanger |
November 14, 1989 |
| The problem of providing a lightweight, efficient and compact impingement plate type heat exchanger for exchanging heat between at least two fluids is solved by providing a stack of generally parallel plates (36) which include end plates (38, 48), intermediate impingement orifice plates |
| 4879662 |
Fluid flow self calibration scheme |
November 7, 1989 |
| A fluid system for calibrating a variable area metering valve during flight when the fluid receiver is not in operation employs several single point fixed calibration orifices that are sequentially used to establish a corresponding number of calibration points in a short time interval. T |
| 4879624 |
Power controller |
November 7, 1989 |
| A system is disclosed for sequentially disconnecting multiple phases of a first power source (12) from an electrical load (14) requiring a minimum of interruption and connecting a second power source (28) to the electrical load. A first embodiment of the invention disconnects immedia |
| 4879484 |
Alternating current generator and method of angularly adjusting the relative positions of rotors |
November 7, 1989 |
| An improved actuator for angularly adjusting first and second rotors of an alternating current generator reduces friction and minimizes the power necessary for affecting the angular adjustment. The rotors are driven by a common shaft through left and right hand helical ball splines. Axia |
| 4878809 |
Power source and control mechanism for propeller pitch control |
November 7, 1989 |
| A pitch controller (10) for controlling the pitch of a plurality of blades (11) of a fan powered by a turbine propulsion engine, with a pitch adjusting device (16) having an input (18) for controlling the pitch of the blades. An input drive shaft (15) provides rotary power from the free |
| 4878805 |
Blower for use in particle contaminated environments |
November 7, 1989 |
| An impeller-type blower for use particularly in environments of particle contaminated air includes a housing defining an aft cavity. An impeller, including a shaft, is rotatably mounted in the housing by a bearing forward of the aft cavity. Passages communicate the aft cavity with a |
| 4876906 |
Non-jamming actuator system |
October 31, 1989 |
| A non-jamming electro-mechanical hydrostatic actuator system includes one embodiment in which a ballscrew assembly has a rotatable nut and an axially movable ballscrew. A motor rotates the nut to axially move the ballscrew. An actuator is operatively connected to a load to be actuated. |
| 4875826 |
Pitot pump assembly for a rotating fluid management device |
October 24, 1989 |
| A pitot pump assembly including a rotating drum 12 having a central bore 14 and a cavity 20 between its two axial ends and at least one radially extending opening 22. A stationary shaft 24 is inserted within the bore 14 and includes a plurality of fluid passages 26. The shaft 24 has one |
| 4875403 |
Variable displacement port plate |
October 24, 1989 |
| An improved hydraulic apparatus is disclosed which may function as either a hydraulic pump or hydraulic motor. A port plate (18) is provided with a high pressure arcuate prot (82) which permits the full range of rotation of the port plate to be used in linearly adjusting the rate of flui |
| 4875149 |
Phase separation control |
October 17, 1989 |
| Polyphase inverters for converting AC power into polyphase AC output power typically experience phase shifts due to unbalanced phase loading. The resulting phase error is undesirable and should be eliminated, if possible. In order to overcome the foregoing problem, a control for main |
| 4875148 |
Control for producing a low magnitude voltage at the output of a PWM inverter |
October 17, 1989 |
| At times, it may be necessary to operate switches of a PWM inverter to provide a low output voltage. However, in order to produce such a low voltage, it may be necessary to operate the switches near their minimum on time limit, which can in turn lead to damage or destruction of the s |
| 4874972 |
Magnetic isolation and cooling system in dynamoelectric machines |
October 17, 1989 |
| In a dynamoelectric machine which includes a rotor and a stator, an integral magnetic isolation and cooling system. A housing is disposed about the machine, the housing being fabricated of magnetically permeable material to define a flux path therethrough. A cooling jacket is sandwic |
| 4874961 |
Electrical power generating system having parallel generator control |
October 17, 1989 |
| A power generation system (40), (120), is disclosed in which the phase and frequency of alternating current generated by one or more generators (14) is locked to the phase of alternating current generated by a master generator (12) or to an external power source (124). A master control u |
| 4874190 |
Specialized hose connector for connecting hydraulic hoses and ports of different ratings |
October 17, 1989 |
| The present invention is directed to a specialized hose end connector utilized for connecting a hydraulic hose dimensioned according to a first industry standard to a hydraulic port dimensioned according to a second industry standard. As one example meant for illustrative purposes only, |
| 4871303 |
Fuel drain safety system for fuel pumps and the like |
October 3, 1989 |
| A fuel drain system for use in a fuel pump for an aircraft fuel tank or the like which includes a housing and a pump cartridge positionable in the housing for removal therefrom. A drain plug is removably mounted on and projects from the pump cartridge for draining residual fuel from the |
| 4869126 |
Mechanical mode shifter |
September 26, 1989 |
| A mechanical mode shifter is provided including an input and first and second outputs, which rotate simultaneously during a first portion of operation. The first output is coupled to the input for providing a continuous drive to the first output. Timing means including sector gears a |
| 4869106 |
Governor checkout apparatus and method |
September 26, 1989 |
| An overspeed governor for adjusting the blade pitch of a propulsor in an unducted fan aircraft engine to prevent propulsor overspeed comprises a flyweight governor which is rotated in response to rotation of the propulsor, a governor pilot valve with a valve spool which is axially mo |
| 4869071 |
Cooling system for an aircraft pod |
September 26, 1989 |
| A cooling system is disclosed for a pod (20) of an aircraft. The cooling system includes an air circulation loop (28) for supplying cooled air to an air input (32) of the pod to cool a load disposed in the pod and for receiving air discharged from an air discharge (34, 35) to the pod whi |
| 4868906 |
Centrifugally activated switch for a synchronous generating system |
September 19, 1989 |
| When operating a synchronous machine as a synchronous generator, a suppression resistor is required across the main generator field. However when operating the synchronous machine as an induction motor, a current is induced in the main generator field which is typically greater than the |
