| Patent Number |
Title Of Patent |
Date Issued |
| 4679485 |
Ballistic tolerant dual load path ballscrew and ballscrew actuator |
July 14, 1987 |
| Ballscrew actuators are well known for use as a primary flight control actuator for operating a flight control surface. The operation of the ballscrew actuator is critical to the success of an aircraft mission; however, when the actuator is subject to ballistic fire a projectile hit |
| 4679462 |
Differential transmission mechanism for a constant speed drive |
July 14, 1987 |
| A differential transmission mechanism using an output differential for a constant speed drive has desirable characteristics including full utilization of the torque capabilities of the hydraulic trim device associated with the output differential; however, there is a limitation on th |
| 4676458 |
Deployment mechanism for a ram air turbine |
June 30, 1987 |
| Deployment mechanism for a ram air turbine has conventionally consisted of a strut pivotally mounted within a storage bay of an aircraft and which pivots to a downwardly-extending position to bring the ram air turbine into deployed position. Such a structure has required a storage bay in |
| 4675804 |
Control system with variable gain integrator |
June 23, 1987 |
| A variable gain integrator for controlling the response time of a controlled device so as to control a condition. The condition is sensed and compared to a set point to determine an error representing the difference therebetween. The difference is integrated by the variable gain inte |
| 4674351 |
Compliant gear |
June 23, 1987 |
| A compliant gear which includes an inner hub portion, an outer ring gear portion, and a compliant laminate between the hub portion and the ring gear portion. The laminate includes a rigid laminar shim of generally uniform thickness sandwiched between a pair of elastomer layers of gen |
| 4674178 |
Method of fabricating a permanent magnet rotor |
June 23, 1987 |
| Loose or frayed fibers at the axial end of a fibrous wrap 42 about the periphery of rotor hub 10 mounting permanent magnets 22 are avoided by placing steps 40 between first and second diametral sections 36, 38 in side plates 32, 34 sandwiching the magnets 22 with the wrap preventing |
| 4673031 |
Variable speed integrator |
June 16, 1987 |
| A variable speed integrator for controlling the response time of a valve which regulates the amount of coolant flowing to a heat exchanger so as to control the temperature of the cooled substance output from the exchanger. The temperature of the cooled substance is sensed and compared to |
| 4673002 |
Flexible fluid for transferring fluids |
June 16, 1987 |
| To transfer a fluid at high service temperature and pressure without the limitations of rigid tubing, a flexible tube is provided with a plurality of generally concentric tubular layers for transferring fluids. The innermost layers define a fluid flow path and provide insulation without |
| 4672556 |
Frequency detector system |
June 9, 1987 |
| A frequency detector in a frequency control for a generating system includes a system processor and a counter for deriving a digital count proportional to the output frequency of the generating system. The system processor executes a series of control cycles during which the processor |
| 4671737 |
Blade pitch changing mechanism |
June 9, 1987 |
| Overspeed conditions in a ram air turbine are eliminated through a novel blade pitching mechanism. The mechanism includes a rotatable shaft with a hub mounted thereon for rotation therewith. The hub rotatably mounts at least one blade and a hollow blade pitch control shaft extends genera |
| 4671211 |
Power source utilizing encapsulated lithium pellets and method of making such pellets |
June 9, 1987 |
| A heat exchanger (16) for a thermal power source includes a chamber provided with an igniter and a reactant inlet. Within the chamber is a mass of lithium pellets, each provided with a coating. |
| 4670828 |
Bi-directional switch for neutral point clamped PWM inverter |
June 2, 1987 |
| Bi-directional switches for use with neutral point clamped PWM inverters have utilized clamping switches which are operated alternately with main power switches in the inverter to periodically connect an output terminal of the inverter to a neutral voltage. However, a delay period is typ |
| 4669999 |
Lubricant delivering and containment overload shearable coupling |
June 2, 1987 |
| A lubricant delivering coupling adapted to interconnect a power transfer unit and a load having a rotary input. The coupling is comprised of a pair of concentrically disposed inner and outer hollow members. The outer member is in a torque transmitting relationship between the power trans |
| 4669700 |
Pilot operated valve |
June 2, 1987 |
| To minimize friction losses and hysteresis losses while providing convenient adjustability without alignment problems in a pilot operated valve, a poppet is disposed between two ports in a valve body and is biased by means of a spaced diaphragm assembly. The poppet is axially positio |
| 4667779 |
Unidirectional high gain brake stop |
May 26, 1987 |
| This invention relates to a unidirectional high gain brake arrangement that includes in combination a shaft mounted for rotation within a housing. The shaft is rotatable in either direction. A brake is selectively releasably coupled to the housing and to the shaft. The brake has a first |
| 4663985 |
Shaft relative speed limiting system |
May 12, 1987 |
| In order to avoid a large torque spike in a system in the event of a system failure, a shaft relative speed limiting system includes a lost motion device and a brake. The lost motion device is operatively associated with a pair of shafts normally driven at selected speeds such that one o |
| 4663581 |
Voltage regulated permanent magnet generator system |
May 5, 1987 |
| A permanent magnet generating system includes first and second permanent magnet generators, or PMG's each having a permanent magnet rotor structure and a stator structure. Each stator structure has at least one stator winding disposed therein and the stator windings of the PMG's are |
| 4661762 |
Emergency power system |
April 28, 1987 |
| An emergency power generating system according to the present invention includes an emergency power converter which is selectively coupled to the output of a permanent magnet machine forming a part of a constant speed drive in the event of a failure of a main generator so that the perman |
| 4660437 |
Differential gear box |
April 28, 1987 |
| An apparatus for controlling pitch variations of the blades of a propeller. A first planetary gearset includes a sun gear, a ring gear and at least one planetary gear meshed with the sun and ring gears, the sun gear being statically grounded. A second planetary gearset is stacked in conc |
| 4658589 |
Non-condensible ejection system for closed cycle Rankine apparatus |
April 21, 1987 |
| An ejection system including a steam ejector 48 having a steam nozzle 54 aligned with a diffuser 56 which defines a outlet from the ejection system. The ejector has an inlet 46, 52 to the interface of the nozzle 54 and the diffuser 56. A normally closed, non-condensible flow control valv |
| 4653918 |
Low Q body-dithered laser gyro assembly |
March 31, 1987 |
| A low Q ring laser gyro-dither motor assembly which is responsive to a wide range of frequency components of a drive signal having a randomly varying frequency such that the dither imparted to the gyro is frequency modulated by the drive. The frequency modulated dither varies the lock-in |
| 4653687 |
Mixing valve |
March 31, 1987 |
| To provide a thermal cooling system in applications having a pumped fluid cooling loop with stringent reliability requirements, a mixing valve has a housing defining a valve chamber provided with a pair of inlet openings and an outlet opening. A valve support is mounted to the housing an |
| 4652782 |
Flanged stator assembly for dynamoelectric machine |
March 24, 1987 |
| In a dynamoelectric machine, a stator assembly is mounted directly to a mounting face of a housing surrounding a rotor projecting from the housing beyond the mounting face in a cantilevered orientation. The stator assembly includes a plurality of laminations bonded together in a stacked |
| 4651267 |
Proportional base drive circuit for transistorized bridge inverter |
March 17, 1987 |
| A proportional base drive circuit which overcomes the problems of the prior art relative to relatively long turn-off time of power switches in an inverter and the absence of protection circuitry therefor includes a current transformer having a primary winding coupled to a main current |
| 4650732 |
Self-compensating heating system for a reserve electrolyte battery |
March 17, 1987 |
| A self-compensating heating system for a reserve electrolyte battery which may be stored at widely varying temperatures and which has a storage tank for electrolyte to be supplied to the battery, a heat exchanger in a flow path from the storage tank to the battery, a laminar flow device |
| 4648322 |
Propulsion and directional control mechanism for an underwater device |
March 10, 1987 |
| A propulsion mechanism for an underwater device and, more particularly, a mobile mine having directional control provided by a pair of positionable fins each independently positionable by an associated fluid cylinder having a piston rod extending therefrom with a rack engaging with a pin |
| 4647805 |
Dynamoelectric machine |
March 3, 1987 |
| Windage losses in a liquid cooled dynamoelectric machine having a stator 10 including an armature 14, a rotor 20 journalled for rotation about an axis within the armature 14, a pump 50, a sump 56 and a liquid flow path 24 within the rotor 20 are avoided through the use of a first transfe |
| 4647804 |
High speed generator rotor oil path air vent |
March 3, 1987 |
| A rotary electric machine including a stator, a rotor journalled for rotation relative to the stator about an axis of rotation and carrying electrical windings. The rotor includes a fluid inlet spaced from a fluid outlet and a cooling liquid flow path is located in the rotor intercon |
| 4643639 |
Adjustable centrifugal pump |
February 17, 1987 |
| An improved pump for efficient operation at low flow rates to avoid undue power consumption and heating of the fluid being pumped. There is provided a centrifugal pump including a housing with an inlet. A radial or mixed flow discharge impeller is rotatably mounted within the housing and |
| 4643290 |
Bi-directional overtravel stop |
February 17, 1987 |
| Rotational overtravel stops are often crucial components of actuators used in environments where not only cost but also power requirements, reliability, weight, size and simplicity are important. A bi-directional overtravel stop for a rotatable actuator shaft is disclosed which includes |
| 4643250 |
Fluid jet impingement heat exchanger for operation in zero gravity conditions |
February 17, 1987 |
| Liquid-vapor phase separation in reservoirs for cryogenic liquid propellants in space vehicles at zero gravity conditions is achieved through a system including a unique heat exchanger. A mixed phase inlet stream is partially separated by centrifugal force imparted to the stream by s |
| 4642535 |
Electromagnetic energy storage and supply system |
February 10, 1987 |
| An electromagnetic energy storage and supply system for supplementing a main power supply to provide D.C. current to a pulsed load by providing that portion of the load current which is above the average load current commanded. The load current is sensed and compared to an average curren |
| 4641737 |
Bi-directional overtravel stop |
February 10, 1987 |
| An overtravel stop for a rotating shaft has a pair of gears associated with the shaft to rotate therewith. Each gear engages an associated limiting gear and the two engaged gear pairs have different gear ratios. One of the limiting gears is threaded over a shaft which is secured for rota |
| 4641544 |
Motion transmitting and timing mechanism |
February 10, 1987 |
| A motion transmitting and timing mechanism including an input gear 36, a timing gear 44 rotatable about an axis 50 and meshed with the input gear 36, and an output gear 64 rotatable about the axis 50 and shiftable along the axis into positions in and out of a plane including the input ge |
| 4641080 |
Permanent magnet generator with fault detection |
February 3, 1987 |
| A generating system including a permanent magnet generator having a stator, a rotor journalled for rotation in proximity to the stator and normally separated therefrom by a small air gap. Permanent magnets and windings are provided on the stator and the rotor respectively, or the reverse |
| 4639188 |
Turbine wheel containment |
January 27, 1987 |
| Axial dislocation of a containment ring for a turbine is avoided through the use of housings having portions overlapping and extending across a radially inwardly opening containment groove in a containment ring. Upon separation of a blade from a turbine wheel, the sleeves are deformed in |
| 4637456 |
Heat exchanger |
January 20, 1987 |
| To provide a cooling arrangement utilizing liquid coolant, and capable of operating at or near the freeze point of the liquid coolant so as not to freeze solid, a steady state heat exchanger is provided. The heat exchanger includes a liquid impingement plate having a liquid carrying |
| 4637272 |
Ballscrew actuator |
January 20, 1987 |
| There are many requirements for an actuator where safety considerations dictate several independent means of actuation. This invention pertains to an actuator utilizing a single ballscrew with drive units associated therewith to provide a level of redundancy which permits full performanc |
| 4637215 |
Regenerator with spray cooler |
January 20, 1987 |
| Component size difficulties in a closed-cycle steam turbine system are eliminated by disposing an annular regenerator about a turbine wheel and providing spray nozzles at the outlet of the regenerator for eliminating superheat in the exhaust steam passing through the regenerator prior to |
| 4635441 |
Power drive unit and control system therefor |
January 13, 1987 |
| A power drive unit and control system therefor avoiding performance degradation which can occur in control of the variable displacement hydraulic motor of the power drive unit by measurement of the angle of a displacement-setting wobbler of the motor and the speed of the motor. This |
| 4635177 |
Control for a neutral point clamped PWM inverter |
January 6, 1987 |
| Prior types of neutral point clamped PWM inverters have included memories for storing a plurality of PWM waveforms, one of which is utilized to control switches in the inverter to maintain an output parameter within prescribed limits. Such types of inverter controls, however, cannot |
| 4634479 |
Power source utilizing encapsulated lithium pellets and method of making such pellets |
January 6, 1987 |
| Encapsulated lithium including a shot shaped and sized body (10) of lithium metal encapsulated in a thin layer (12) of a predominantly fluorine substituted polyolefin based polymeric material, a method of making the same and a power plant utilizing the encapsulated lithium as fuel (FIG. |
| 4633382 |
Inverter control system |
December 30, 1986 |
| AC motor drives which include static inverters typically are operated by inverter controls that are designed according to certain criteria so that the inverter is operated in an efficient manner. Generally, it is desirable to design such a control to reduce as much as possible losses in |
| 4633381 |
Inverter shoot-through protection circuit |
December 30, 1986 |
| Prior circuits for protecting inverter switches from the possibility of overlapping operation which may cause shoot-through have required complex and expensive delay circuits to provide a fixed delay between turn-off of one switch and turn-on of the complementary switch. In order to over |
| 4633113 |
Side plate construction for permanent magnet rotor |
December 30, 1986 |
| Loose or frayed fibers at the axial end of a fibrous wrap about the periphery of rotor hub mounting permanent magnets are avoided by placing steps between first and second diametral sections in side plates sandwiching the magnets, with the wrap preventing radial displacement of the m |
| 4631573 |
Cooled stack of electrically isolated semiconductors |
December 23, 1986 |
| Electrical isolation of semiconductors in a stack with interposed heat sinks is attained through the use of a thin sheet 30 of electrical insulating material disposed between first and second, electrically conductive heat sink elements 26, 28, each having a planar surface 32, 34 and |
| 4631009 |
Lubrication scavenge system |
December 23, 1986 |
| A lubrication scavenge system for an engine bearing compartment or the like utilizing a gear pump with two or more independent inlets with separate flow paths through the pump. The inlets and flow paths are maintained separate from each other by the use of inlet and discharge seal arcs t |
| 4631000 |
Variable displacement hydraulic pressure intensifier |
December 23, 1986 |
| A hydraulic pressure intensifier for boosting normal system pressure in a hydraulic system to a higher level in order to increase the force provided by a pressure-operated actuator. The hydraulic pressure intensifier has a motor-pump unit with a rotatable cylinder block with cylinders de |
| 4628219 |
Rectifier assembly for mounting in a rotor |
December 9, 1986 |
| Disclosed is an improved rectifier assembly for use in a rotor of a dynamo electric machine which includes a tubular housing receiving a stack of plates sandwiching diode wafers between studs on certain of the plates and confined by annular ridges on others of the plates. The plates are |
| 4627330 |
Unitary bearing retainer for a swashplate bearing |
December 9, 1986 |
| The invention is directed to a unitary cage assembly annularly positioning a plurality of rollers in a pair of roller bearings supporting a cradle swashplate. By utilizing the unitary cage assembly, a parallel relationship between the rollers is assured and, furthermore, only a singl |
