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7194816 |
Mobile terminal apparatus
A mobile terminal apparatus 1 uses an acceleration sensor as a tilt angle sensor 24, and realizes various applications based on this detection result. A processing unit 10 counts the number of...
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6826843 |
Electronic compass apparatus and method
An apparatus and method for determining the orientation of Earth's magnetic poles. A magnet is pivotally coupled to a support and is free to orient itself with Earth's magnetic pole. A detector is...
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6742270 |
Luminescent indication compass
A luminescent indication compass includes an electric power supply, a luminescent driver, a luminescent panel, a control panel, a voltage dropping circuit, and an electronic compass module. The...
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6070333 |
Electronic compass
An electronic compass has a compass housing. An electronic magnetic field sensor is disposed in a fixed position relative to the compass housing. A magnet is rotatably mounted relative to the...
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6018302 |
Mechanical pointer drive for avionics display
An avionics display (10) for use in an aircraft navigation system including a navigation receiver. The avionics display (10) includes a needle (12) for indicating the position, heading, glide slope...
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5560115 |
Gimbaled magnetometer with inductive coupling
An apparatus for mounting a magnetometer including a frame and a platform mounted for rotation within the frame. The magnetometer and one or more counterweights are mounted within the platform such...
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5282318 |
Position sensor
A position sensor has a ring of a material of high permeability that is floated on a liquid within a hermetically sealed toroid, so as to hold the ring in a horizontal position. Exciting coils are...
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4750349 |
Microcomputer controlled quick ranging technique and digital filter
A quick ranging technique controlled by a microcomputer, makes predetermined stepped adjustments to the charge times in a ranging circuit to bring the charge time into a required range, thusly...
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4546550 |
Compass
An electronic compass for vehicles comprising at least two magnetic sensors arranged in use to be respectively responsive to orthogonal horizontal components of a magnetic field which includes the...
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4531298 |
Apparatus and method for controlling northerly turning error in direction indicating navigational instruments
A system to control the effect of northerly turning error which may occur in any direction indicating navigation instrument which includes a component responsive to the earth's magnetic field. In...
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4428053 |
Adaptive compass and north stabilization drive system
This system accepts compass outputs from a wide variety of compass output devices such as stepper and synchro devices having different coupling ratios, supply voltages and carrier frequencies. The...
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4412387 |
Digital compass having a ratiometric bearing processor
A digital compass including a two-axis earth's magnetic field sensor and a earing processor computes the bearing for local display or transmission from a remote site to a local site for display...
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4402142 |
Electronic compass for automotive vehicles
An electronic compass for vehicles such as automobiles comprising a float mechanism including a permanent magnet for following the earth's magnetic field and four Hall effect sensors for detecting...
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4398353 |
Compass data converter
The peaks of synchro or step data representative of compass heading are detected and the resulting logic levels are latched into a register by an enable pulse generated in response to the data...
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4379366 |
Direction finding system
A direction finding system of the type finding a present direction on 4N direction divisions defined by 2N boundary levels for automotive vehicles, said system comprising a magnetic sensor circuit...
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4327363 |
System for transmitting heading information from a compass to several followers
A synchro transmitter having a rotor driven by a compass communicates the heading information from that compass to a plurality of loads via respective synchro receivers whose rotors are energized...
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4255866 |
Nonmagnetic compass
A compass device for underwater use and having substantially no magnetic nature or influence utilizes three Hall effect generators in an array wherein two of the generators have their principal...
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4250626 |
Electronic compass
Set out herein is an electronic compass suitable for public use having a conventional pin supported magnetic needle which is placed over a set of magneto diodes or Hall devices arranged in...
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4232451 |
Detector for sensing the angular position of a rotatable magnet
A detector to detect angular positions of a rotatable magnet, i.e., a magnetic compass, having one or more flux-sensitive components, namely Hall-elements. The detector includes a substantially...
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4075619 |
Remote reading compass display
A digital compass display readily movable to different intended mounting positions and including a multidigit numerical indicator mechanically and electrically connected to an end of an electrical...
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4067007 |
Adaptive compass drive system
A radar system having an adaptive compass drive capable of operation over a wide variety of compass outputs and supply voltages and frequencies. For compass outputs in the form of multi-phased...
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4059064 |
Marine auto pilot
A marine auto pilot employing a compass with a Hall-effect sensing element in conjunction with a magnetic circuit designed to provide a high intensity magnetic field; electrical circuitry designed...
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4053829 |
Apparatus for detecting the direction of a magnetic field to sense the position of, for example, a rotary element or the like
Apparatus for detecting the direction of a magnetic field includes a magnetoresistive device comprising an insulating substrate, first and second ferromagnetic metal film strips on the substrate...
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4047168 |
Digital compass and gimbal assembly for two conductor connection
A remote reading magnetic compass operative with only two electrical connections for both power and data purposes. The compass includes a disc which is photoelectrically sensed to provide output...
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3959889 |
Method and apparatus for determining a measured direction relative to an external magnetic direction
An apparatus is disclosed for determining a measured direction such as the direction of a ship or airplane relative to an external magnetic field such as the magnetic field of the earth. This...
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3935645 |
Apparatus for indicating relative azimuth
An arrangement for indicating a relative azimuth between two objects remote from each other, such as a control station and a mobile unit remotely controlled by the station, on which are...
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3921305 |
Method and apparatus for digitally operating a compass card in a navigation system
A pictorial navigation system includes a stepper motor driven compass card. Digital information is picked off of a gyro, decoded to determine direction and processed through a motor sequencer to...
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3906641 |
Autopilot employing improved hall-effect direction sensor
An improved marine compass employs a Hall-effect device which provides an output signal related to the relative rotation of the compass card therein. When the Hall-effect device is mounted on a...
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3906483 |
Compass display circuit
For use with a digital magnetic compass providing a serial pulse train representative of compass heading, a display circuit for converting received pulse trains into parallel codes for driving a...
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3825823 |
APPARATUS FOR DETECTING THE DIRECTION OF A MAGNETIC FIELD RELATIVE TO A MARKER DIRECTION BY SEQUENTIALLY SCANNING PLURAL STATIONARY SENSORS
An apparatus to detect the direction of an external magnetic field is disclosed incorporating a flux gate magnetometer having a plurality of sensing coil arrays. A scanner sequentially connects...
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D235854 |
Title is not available
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3253341 |
Apparatus for determining the orientation of borehole instruments
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3193944 |
Magnetic compass for aircraft
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3146530 |
Pendulous north seeking gyroscopic assembly
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3119189 |
Heading system
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2995827 |
Automatic steering apparatus for vessels, vehicles and other guided bodies
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2924886 |
Transmitting magnetic compass systems
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2886898 |
Compass system
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2806295 |
Electrical borehole surveying device
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