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4345462 |
Vessel location system
A system for determining the location of the sinking of a vessel by providing a seaworthy box that is automatically ejected from the vessel at the time of sinking and that has a battery aboard the...
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4346363 |
Electronic circuit for sensing deviations in physical forces thereon
An electronic sensor circuit is provided which generates predetermined frequencies corresponding to the resultant force vector of the gravitational and inertial forces. There is further provided...
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4342274 |
Steering failure alarm
An apparatus for providing the operator of a marine vessel with an alarm when when a malfunction occurs in the steering system of the vessel. The apparatus utilizes a closed loop simulator to...
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4339943 |
Pressure transducer cross-check system
A pressure transducer cross-check system (10) in which a pair of low precision pressure transducers (12, 14) which detect parameters related to each other in content are alternately periodically...
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4340936 |
Microprocessor navigational aid system
A navigational aid system including a microprocessor having peripheral memory devices and being programmed by a read only memory, the system including sensors for measuring variable parameters and...
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4335433 |
Method for correcting navigation errors due to water currents
In a satellite navigation system for an ocean vessel, a major source of error is unknown ocean currents when the navigation is done by dead-reckoning with respect to the waters. The present method...
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4327498 |
Magnetic compass compensation system
In a magnetic compass compensation system suitable for use within a ferrous land vehicle, a secondary magnetic sensor senses, the total magnetic field as components along a three axis system drawn...
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4326189 |
Aircraft control/guidance display and mechanism for enroute and landing utility
A flight director type of aircraft control or guidance display and mechanism for pilot reference which provides a composite integrated display of roll, pitch and heading with a sensing relationship...
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4318300 |
Low cost self aligning strapdown attitude and heading reference system
Apparatus including two two-degree-of-freedom gyroscopes and at least two accelerometers mounted on a turntable on a vehicle. The turntable can be positioned about a vehicle vertical axis in one or...
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4315326 |
Inertial measurement underwater tracking system
An inertial measurement underwater tracking system which determines range sition onboard an underwater vehicle using inertial navigation techniques. The system uses acoustic telemetry to relay the...
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4311046 |
Multiple sensing device and sensing devices therefore
A multiple sensing device has sensors, mounted on a common rotatable shaft, for sensing magnetic field, electric field, gas flow, angular acceleration and linear acceleration. The latter three of...
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4300390 |
Apparatus for determining positional coordinates utilizing the terrestrial magnetism as a directional reference
Apparatus for determining the positional coordinates of a moving object including a plurality of magnetic field vector detecting devices, an inclination detecting device for detecting inclination...
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4295372 |
Gravity measurement apparatus for ships
The output of the vertical accelerometer of a ships inertial navigation sem (SINS), in pulse form, is first counted and scaled to provide an output related directly to the total acceleration. The...
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4283943 |
Method and apparatus for indicating and adjusting the angular position of a sail
Apparatus and method for indicating and adjusting the angle between the horizontal tangent to the luff of a sail and the direction of the apparent wind.
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4283705 |
System for providing an integrated display of instantaneous information relative to aircraft attitude, heading, altitude, and horizontal situation
A display device particularly suited for providing the pilot of an aircraft with combined inflight attitude, heading, altitude, and horizontal situation information previously available only by...
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4281384 |
Rim inertial measuring system
An annular momentum control device (AMCD) 11 is operated in a strapped down position on a spacecraft. The signals from the position sensors 18 and 19 at the several AMCD magnetic bearing stations...
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4280188 |
Survivable redundant vector sensors for systems with differing maximum output requirements
Six sensors are oriented to position their input axes on the surface of a cone. The cone angle is optimized to permit the use of sensors with identical range capacity despite the fact that the...
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4265111 |
Device for determining vertical direction
An improved system for determining the vertical direction relative to a moving base includes gyroscopic rate sensors for determining angular velocities of a device such as a weapon mounted on the...
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4244215 |
Autonomous navigation system
An inertial navigation system utilizing a servo-controlled two-degree of freedom pendulum to obtain specific force components in the locally level coordinate system. The pendulum includes a...
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4240290 |
Skin friction measuring device for aircraft
A skin friction measuring device for measuring the resistance of an aerodynamic surface to an airstream, adapted to be mounted on an aircraft, within an opening defined therein, and characterized...
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4236409 |
Device for indicating optimum sail position
An indicator for indicating the optimum angular position of a sail which is adapted to be rotated in various positions relative to a wind, and wherein the position of the sail may be represented by...
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4215334 |
Aircraft excessive descent rate warning system
In an aircraft excessive rate of descent warning system that utilizes barometric descent rate compared with aircraft altitude above ground to generate a warning, nuisance warnings at airports...
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4212444 |
Gust bias signal-generating circuit for aircraft throttle control system
A system for processing signals representative of airspeed error and inertial longitudinal acceleration in first and second channels, respectively, and providing cancellation of the...
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4212443 |
Strapped down attitude and heading reference system for aircraft employing skewed axis two-degree-of-freedom rate gyros
A set of two two-degrees-of-freedom rate gyroscopes and three linear accelerometers are assembled in a single module adapted to be mounted within a single aircraft electronics control unit, the...
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4190962 |
Navigation devices
Improvements are disclosed in the pattern cone of the magnetic compass as described and claimed in copending application 769409, Harold T. Lyman, Jr., now U.S. Pat. No. 4,132,113. Simpler apparatus...
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4189122 |
Wide angle gimbal system
A system for mounting a gimbal assembly to expand the range of angular mon of the gimbals and to permit direct connections to the gimbals. Two counter rotating members between the mounting base and...
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4189118 |
Shear detection and compensation circuit for aircraft throttle control system
A system for processing signals representative of airspeed error and inertial longitudinal acceleration in first and second channels, respectively, and providing cancellation of the...
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4182171 |
Navigation device for aircraft navigation
An aircraft navigation display which allows a pilot to easily envision his position, heading, wind drift and direction of travel relative to one or more radio stations. The presentation allows the...
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4179818 |
Tetrahedral redundant inertial reference unit
A redundant inertial reference system is provided with four gyroscope units, with the spin axes of the gyroscopes in the units being oriented, respectively, perpendicular to the four faces of an...
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4167113 |
Display systems
A head-up display system for an aircraft has a display unit which projects a display of symbology representing the aircraft flight parameters onto a separately mounted partially-transparent...
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4163387 |
Aircraft cabin display unit
A cabin display unit accepts information from a plurality of sources such as the petot static tube, a static air pressure source, a temperature source, cabin pressure source and the like and...
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4156548 |
Magnetic suspension and pointing system
Apparatus for providing accurate pointing of instruments on a carrier vehicle and for providing isolation of the instruments from the vehicle's motion disturbances. The apparatus includes two...
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4151519 |
Protective circuit for compass repeater amplifier systems
Gyrocompass heading step-by-step repeater amplifier channels are provided with protection from damage by accidental short-circuits occurring in one or more compass step-by-step data repeaters or in...
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4149410 |
Method of navigation for sailing boats
A method and a device for facilitating the determination of wind direction and the position of a sailing vessel on a racing course. One and the same geographical bearing determined by the wind...
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4140077 |
Portable navigational aid
A portable navigational aid or device for use in a user-sailboat or similar vessel, where the user-sailboat and another approaching boat are traveling along courses which intersect, to indicate...
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4129087 |
Combination pursuit and compensatory display system
This invention is a display system to assist a human operator in manually ntrolling a ship. This system may be operated in a conventional autopilot mode, where the system controls the ship...
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4127249 |
Apparatus for computing the rate of change of energy of an aircraft
A rate of change of energy computer utilizing signal processing of the inner vectorial product of inertial acceleration and inertial velocity wherein such parameters are derived utilizing outputs...
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4125017 |
Redundant inertial measurement system
A system providing economical redundant strap-down inertial measurement capability in a space navigation system. By appropriate orientation of two-degree-of-freedom dry tuned rotor gyros, the...
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4123019 |
Method and system for gravity compensation of guided missiles or projectiles
A control system for a guided missile or projectile in which signals to compensate the steering commands of the guided missile or projectile for the effects of gravity are dynamically produced and...
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4122710 |
Course to wind guidance device
A guiding device for guiding the helmsman of a sailing vessel in steering a preset course relative to the apparent wind. The device employs a course selector a single setting of which presets the...
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4116057 |
Pendulous induction compass transmitter with means to compensate for heading errors in turns due to the vertical component of the Earth's magnetic field and due to two cycle error
The invention relates to an apparatus for compensating the output of a pendulous induction compass transmitter to eliminate heading errors during turns due to the vertical component of the Earth's...
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4114436 |
"Strapdown" induction compass transmitter with compensation for heading errors due to the vertical component of the Earth's magnetic field and due to two cycle error during turns and during climbing and diving maneuvers
The invention relates to an apparatus for compensating a "strapdown" induction compass transmitter to eliminate heading errors during turns and during climbing and diving maneuvers which are due to...
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4114437 |
Navigation instrument for the navigation of land vehicles
The vehicle is operated over land which is described by a grid coordinate system having a north direction offset from geographic north. The vehicle has a pick-up to determine its heading speed...
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4112755 |
"Strapdown" induction compass transmitter with means to compensate for heading errors during turns and during dives and climbs due to the vertical component of the Earth's magnetic field and due to two cycle error
The invention relates to an apparatus for compensating a "strapdown" induction compass transmitter to eliminate heading errors during turns, and during climbing and diving maneuvers which are due...
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4112754 |
Pendulous induction compass transmitter including means external to the transmitter to compensate for heading errors in turns due to the vertical component of the Earth's magnetic field and due to two cycle error
The invention relates to an apparatus for compensating the output signals from a pendulous induction compass transmitter to eliminate heading errors during turns due to the vertical component of...
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4109886 |
Semi-automatic flight control system utilizing limited authority stabilization system
A flight control system utilizing a limited authority stability augmentation system having a long term attitude and/or path control input to enhance the automatic flight capability of the stability...
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4107988 |
Navigation aid for sailing vessels
A navigation aid for sailing vessels which provides a continuous indication of the actual progress towards a selected position or goal, such as a course mark in a sailboat or yacht race, is...
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4104722 |
Method and apparatus for celestial navigation
This invention provides an improved method and apparatus for celestial navigation. A reference spherical triangle is established from the coordinates of the ground position of an observed selected...
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4103638 |
Automatic piloting system
An automatic piloting system for the automatic steering of a marine or other vessel along an intended course in which a digital signal representing an intended course is processed to provide rudder...
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4103279 |
Diver navigation system
An underwater navigation device wherein a flux gate compass provides head difference signals, a doppler navigation sonar provides drift angle signals, which signals are combined by a summer to...
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