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| Number | Title | Issue Date |
| 4032759 | Shipboard reference for an aircraft navigation system A low cost shipboard reference system for carrying out the rapid alignment of aircraft inertial platforms in which an aircraft quality inertial reference is installed on shipboard and is operated in conjunction with a shipboard Kalman filter providing upd... | 06/28/1977 |
| 4022150 | Sailboat steering indicator system An electrical signal in accordance with the direction of the wind relative to the heading of a sailboat is generated by means of a wind direction sensor and a transducer. This signal is fed to a summing device where it is summed in opposite polarity relat... | 05/10/1977 |
| 4023018 | Navigation system and method A coordinate indicating and plotting system wherein compass heading signals are periodically integrated at frequencies related to the distance traveled by a water, air or land vehicle to obtain coordinate change signals for visual indication of vehicle co... | 05/10/1977 |
| 4023016 | Signal characterizing apparatus A digital circuit for generating an error correction or otherwise characterized signal having a value which changes in accordance with a second signal such as the speed of an airplane (MACH). As a specific example, the generated signal is indicative of th... | 05/10/1977 |
| 4012713 | System for providing an indication of wind shear The output of a transducer providing a signal in accordance with the instantaneous air speed of an aircraft is differentiated and fed to a summing device which subtracts therefrom a signal in accordance with the horizontal acceleration of the aircraft, th... | 03/15/1977 |
| 4009464 | Apparatus for indicating attitude failure Apparatus for indicating attitude failure in an attitude indicator system in which energy is stored and isolated from all other apparatus during normal operation and transferred to the attitude indicator when attitude failure is detected, resulting in an ... | 02/22/1977 |
| 4006632 | Aircraft turn coordinator An aircraft turn coordinator used in an aircraft to sense both yaw and roll rate along the longitudinal flight axis. The coordinator includes a gimbaled rate gyroscope which is connected to a turn indicator arm by a gear train. The rapid rotation or lashi... | 02/08/1977 |
| 4006631 | Magnetic heading reference This invention employs a magnetometer as a magnetic heading reference for a vehicle such as a small aircraft. The magnetometer is mounted on a directional dial in the aircraft in the vicinity of the pilot such that it is free to turn with the dial about t... | 02/08/1977 |
| 4004460 | Ship movement measurement A method and apparatus for measuring and displaying the movement of a ship wherein the longitudinal and lateral velocity of the ship are measured. The longitudinal and lateral velocities are combined with the rate-of-turn of the ship to provide indication... | 01/25/1977 |
| 3998411 | Speed overshoot correction system A system for compensating for certain speed overshoot problems encountered in large instrument-controlled aircraft during long-term deceleration from high speeds, such as may be encountered in preparation for descent to landing approach from cruise condit... | 12/21/1976 |
| 3996787 | Apparatus for indicating ice accretion Apparatus for indicating rate of ice accretion includes an endless test surface upon which ice forms in use. A gas flow passage terminates adjacent the surface in an aperture which is presented to and spaced by a known gap from the test surface. A flow of... | 12/14/1976 |
| 3989208 | Thrust and flight path control decoupling system Signals representative of the acceleration of an aircraft due to the change in flight path angle are coupled through a high pass filter (washout circuit) to obtain a short term compensation signal (Vcomp) which signal is further coupled to a lo... | 11/02/1976 |
| 3988927 | Command bar mechanism for flight director indicator A command driving mechanism for command bars which are rotatable about the longitudinal axis of and transversely displaceable with respect to the horizontal reference line of a flight director indicator includes a command plate, the plane of which is para... | 11/02/1976 |
| 3988713 | Aircraft ground proximity warning instrument An aircraft instrument for warning the pilot that the aircraft is in an unsafe condition in proximity to the ground. The instrument has inputs representing aircraft configuration, flight condition with respect to the ground, and glide slope. Detector circ... | 10/26/1976 |
| 3979090 | Velocity damped erection system for stable gyroscopic attitude and heading reference apparatus An improved second order gyroscopic attitude and heading reference system including separate variable time constant accelerometer integrators for independently controlling the velocity error signals associated with respective east and north acceleration s... | 09/07/1976 |
| 3970829 | Composite situation analyzer and instrument flight system Flight path angle is displayed relative to the aircraft reference indicator in a unique display and aircraft control system particularly useful during approach operations. Flight path angle is computed as a function of vertical velocity of the aircraft an... | 07/20/1976 |
| 3968684 | Apparatus and method for determining optimum direction of process of sailing vessels Apparatus and a method for use in determining the optimum direction of progress of a sailing vessel from one point to a second point are described. The angle of leeway between the direction of heading of the vessel and the course of the vessel is measured... | 07/13/1976 |
| 3967499 | Measuring rate-of-turn on board of ships A method and apparatus for measuring and displaying the rate-of-turn of a large ship while substantially eliminating response to rolling and pitching motions of the ship.... | 07/06/1976 |
| 3967799 | Head up display and pitch generator A collimated head up display of pitch related information for an aircraft operator. A generated pitch signal combines a gyroscope signal referenced to the airframe with an inertial signal referenced to the head up display or combiner screen. A pitch error... | 07/06/1976 |
| 3960344 | Precision mobile gravity survey and guidance system A gravity survey and aircraft guidance system comprises a pendulum clock mounted in an aircraft in level flight, having a pendulum bob with a signal sender mounted thereon. A signal receiver mounted in proxmity to the pendulum bob generates an electrical ... | 06/01/1976 |
| 3958218 | Aircraft ground proximity warning system with speed compensation By using air speed as an input to a ground proximity warning system that includes: a signal representative of the time rate of change of the aircraft altitude with respect to ground; circuitry for limiting the amplitude of this signal; a signal that repre... | 05/18/1976 |
| 3958219 | Terrain closure warning system with altitude rate signal conditioning In an aircraft terrain warning system utilizing a radar altimeter wherein the rate of closure to the terrain is compared with the aircraft's altitude above the terrain to generate a warning signal when the closure rate is excessive for a particular altitu... | 05/18/1976 |
| 3955071 | Windshear detection system A system for processing signals representative of airspeed error and inertial longitudinal acceleration of an aircraft to provide an output signal representative of windshear induced acceleration which is filtered to remove the high frequency components a... | 05/04/1976 |
| 3949597 | Gyroscopic device for locating the geodetic point of route A device for determining the longitudinal and latitudinal position of a carrier includes a gyroscopic system having a cage on which three pairs of masses are supported for rotation about mutually perpendicular axes. The cage is supported in a support with... | 04/13/1976 |
| 3948096 | Apparatus for computing the acceleration of an aircraft along its flight path Apparatus for providing a measure of the acceleration of an aircraft along its flight path derived from computations involving inertial measurements of longitudinal and normal accelerations of the aircraft relative to the direction of the earth's "g" fiel... | 04/06/1976 |
| 3948437 | Automated pelorus system A pelorus system for automatically providing an output display of the magnetic bearing of sighted objects. A pelorus sight is coupled to a shaft encoder which provides output pulses representative of the relative angular bearing of a sighted object. Pulse... | 04/06/1976 |
| 3947810 | Negative climb rate after take-off warning system with predetermined loss of altitude inhibit In a warning system for aircraft that generates a warning signal when the aircraft is descending during a take-off or missed approach phase of operation, the warning is inhibited for a predetermined loss of altitude in order to allow the aircraft to desce... | 03/30/1976 |
| 3947808 | Excessive descent rate warning system for aircraft In a system that compares the rate of descent of an aircraft with its altitude above ground and generates a warning signal when the sink rate exceeds a predetermined limit for a particular altitude, the maximum warning time is limited to a specified value... | 03/30/1976 |
| 3943764 | Sailboat steering indicator system An electrical signal in accordance with the direction of the wind relative to the heading of a sailboat is generated by means of a wind direction sensor and a transducer. This signal is fed to a summing device where it is summed in opposite polarity relat... | 03/16/1976 |
| 3944968 | Aircraft ground proximity warning system having speed versus altitude compensation The warning system includes a function generator for generating a signal representative of a minimum altitude over terrain as a function of the aircraft's speed. This signal is combined with a signal representing the aircraft's actual altitude over the te... | 03/16/1976 |
| 3943763 | Magnetic heading reference This invention employs a magnetometer as a magnetic heading reference for a vehicle such as a small aircraft. The magnetometer is mounted on a directional dial in the aircraft in the vicinity of the pilot such that it is free to turn with the dial about t... | 03/16/1976 |
| 3941984 | Satellite radio ranging velocity navigation In an integrated satellite navigation system where satellite fixes periodically establish the position of a ship plying a course within the range of a chain of radio ranging stations, ship velocities are accurately determined in the interval between satel... | 03/02/1976 |
| 3935828 | Method and apparatus for obtaining maximum sail boat velocity In a sailboat, signals representing relative wind speed and slot wind speed are differentially compared to obtain a signal that represents the increase in wind speed in the slot over the relative wind speed approximately independent of incremental changes... | 02/03/1976 |
| 3936798 | Indicator display mechanism A drive mechanism for positioning a moveable indicator in rotation about, and/or radial displacement with respect to, a fixed reference index. Dual dial cord drives are employed which are driven from respective inputs definitive of the rotation and radial... | 02/03/1976 |
| 3934222 | Terrain closure warning system with climb inhibit and altitude gain measurement In a terrain warning system wherein the rate of the aircraft's closure to the terrain is compared to the aircraft's altitude above the terrain in order to generate a warning signal for excessive closure rates, a circuit is provided to inhibit the warning ... | 01/20/1976 |
| 3934221 | Terrain closure warning system with altitude rate signal conditioning In an aircraft terrain warning system utilizing a radar altimeter wherein the rate of closure to the terrain is compared with the aircraft's altitude above the terrain to generate a warning signal when the closure rate is excessive for a particular altitu... | 01/20/1976 |
