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7414921 |
Portable electronic device with radiofrequency signal receiver and method for determining the position of the same
The portable electronic device, preferably a wristwatch, includes a radiofrequency signal receiver for receiving, in particular, GPS signals via an antenna, a magnetic compass, a microprocessor...
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7134213 |
Magic compass
A magic compass that gives the illusion it defies the laws of nature, providing usage as an aid for locating the direction of prayer as well as a novel promotional device for companies, having a...
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7113451 |
Electronic watch having a compass function
The multi-function watch ( 1 ) includes a magnetic sensor assembly associated with its electronic circuits. The hands ( 7 to 9 ) of its display are activated by electric motors to indicate the...
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6633813 |
Navigation system for supplementary representation of directional information
The invention relates to a navigation system for a land vehicle having a measuring arrangement for supplying position, direction and/or distance data, having a data source arrangement for supplying...
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6282802 |
Hand-held needleless compass
A multi-function, hand-held compass is made up of a base member having a compass vial at one end and a socket at the opposite end to releasably attach to a clip. A lateral depression is formed in...
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6185157 |
Timepiece including a GPS receiver, arranged in particular, for indicating the direction of a "target" location
A timepiece (7) including hands (4, 5), direction determining means (10, 11, 14, 12) including data input means (14) arranged for inputting the geographical coordinates of a "target" location in...
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5995913 |
Method of stabilizing the horizon of magnetic compasses
Disclosed is a method of stabilizing the horizon of magnetic compasses. At measuring points measurements are taken of spatial components of the geomagnetic field vector and of an overall...
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5749150 |
Direction indicator for navigation
An electronic audio/visual direction indicator for underwater or other types of navigation which gives unobtrusive and continuous directional feedback without the need for manual manipulation.
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5701259 |
Method for stabilizing the directional display of magnetic compasses
A method is specified for stabilizing the directional display of magnetic compasses on bodies moving in a magnetic field, in particular the terrestrial magnetic field, against magnetic interference...
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5697162 |
Arrangement serving to indicate the direction of a given geographic location
The arrangement (42) according to the invention is formed by a watch comprising a dial (8) on which is shown a map (14) centered on a given geographic location, Mecca in particular. The arrangement...
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5566462 |
True magnetic compass
A magnetic compass comprising an arrangement to displace a correcting marker to create a compass correcting coefficient equal to the sum of the variation and the deviation errors effecting the...
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5467532 |
Hedge trimmer aid
A hedge trimmer aid including a reference indicator similar to a bubble level wherein an included air bubble is replaced by a small sphere of lower density than a surrounding fluid provides a true...
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5388337 |
Angle orienting level apparatus
A level includes a compass member fixedly mounted within the level, the level having spirit levels positioned on opposed sides of the compass, and the compass having a rotatable ring arranged to...
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5381603 |
Reference pointer for a compass display
An electronic compass has a display including a reference pointer that indicates a reference heading stored in response to an input signal. The reference heading is the current heading at the time...
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5367781 |
Directional indicator
A directional indicator made to fasten around the wrist for guiding the user in a predetermined direction, including a magnetized needle attached rotating dial balanced on a pointed pin inside a...
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5173709 |
Electronic direction finder
An electronic direction finder (10) includes a navigation receiver (28) and a compass (32) to generate a bearing signal that indicates that direction of a desired destination. The bearing signal is...
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4571843 |
Device for preventing error in a compass
A device for preventing error or misreading in a marine compass fastened to a sloping plane, the compass being provided with a pendulum (9) mounted for limited pivoting movement inside its...
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4418480 |
Magnetic heading reference
Devices for vectorially summing two signals. In a first embodiment (FIG. 3) the vectorial summation is implemented by a mechanical sin/cos mechanism in which a crank 22 drives two linear...
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4372052 |
Device for indicating direction to a predetermined locale
A direction indicating device has an azimuth card which is positioned upon a compass. The card is provided with a number of indicia marks corresponding to specific geographic locations. An...
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4357756 |
Magnetic compass
A magnetic compass comprises a case having a transparent cover and a magnetic compass card having a hub, which is rotatably supported on a central shaft projecting up from the base of the case by...
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4341023 |
Digital compass
A digital magnetic compass provides an octant display of magnetic bearing in alphabetic characters and incorporates a magnetic sensor for providing signals representative of the orientation of the...
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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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4184267 |
Compass having a course directing pointer
A compass is provided with a course indicated pointer, rotatable about the same center as the compass card, and frictionally engaging the same. A mechanism, including a finger for catching the...
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4150491 |
Indicator of true wind direction for sail boats
A compass with means attached thereto for presenting a visual indication of the direction of the true wind. Such compass includes a compass dial divided into a plurality of equal parts, and it can...
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4089118 |
Course indicator
A course indicator including a marker which is normally movable following a compass and which may be automatically set to a reference position in alignment with a lubber line upon command....
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4085514 |
Parallel wall indicator
The indicator includes rotationally movable indicator means for indicating a selected reference angle and pendulum actuator means for maintaining the angular position of the indicator means...
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4037328 |
Spatial orientation device
A navigational device for use by underwater swimmers and divers in which a telescopically extensible boom is releasably and pivotally attached to the swimmer or diver. A compass device such as a...
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3975831 |
Directing instrument
A directing instrument for control of the inclination of the drill post of a drilling apparatus comprising means for sensing the inclination of the post in two directions at right angles to one...
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3947970 |
Roll alignment gauge
An alignment gauge for use in determining whether two elongated members, such as cylindrical rolls, are in parallel relationship. The gauge includes a rod or standard, and a pad is connected to a...
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3919782 |
Magnetic compass assembly
A compass assembly having an adjustable sighting element whereby the line of sight may be set to meet individual requirements. The assembly is constituted by a transparent compass capsule having a...
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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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3871108 |
Directional device
A directional device for overland travel to aid in returning to intersect a roadway, in which a pair of concentric rotatable dials and a freely rotatable compass needle are mounted on a frame. One...
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3853089 |
COURSE SELECTOR AND INDICATOR
A compass and course indicator comprising a compass having means for directing energy toward the indicator from a point determined by magnetic North, a positionable course selector and indicator...
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3824947 |
COMPASS DEVICE FOR SAILING
A compass device for use in sailing, which has a compass frame mountable in the sailcraft and comprising a compass card box provided with a main steering index and, outside this box external...
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3804057 |
SAILBOAT RACING CALCULATOR
A sailboat racing calculator which is mounted on a sailboat adjacent a compass. A compass dial marked with compass bearings is coaxially rotatably supported below a reference disc having windows...
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3802088 |
GUIDANCE SYSTEM FOR UNDERWATER SWIMMERS
A torso-mounted guidance package to be worn by an underwater swimmer. It orporates a magnetometer circuit supplying earphoes with dichotic and proportional course error signals. These signals are...
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3786571 |
AUDIO COMPASS
The audio compass includes a first polarized transparent sheet affixed to a magnetic needle of a magnetic compass, and second and third polarized transparent sheets affixed to a graduated compass...
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3660907 |
UNDERWATER NAVIGATION INSTRUMENT
A device adapted to be worn on a diver's wrist for indicating a course underwater comprising a magnetic compass mounted in a case having a side window with means attached to the compass for...
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3552029 |
COMPASS
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3538881 |
HORIZONTAL SITUATION INDICATOR WITH NONLINEAR COMPASS CARD
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3522728 |
NAVIGATIONAL INSTRUMENT
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3521597 |
HEADING-SETTING CONTROLS
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3516173 |
NAVIGATION APPARATUS
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3448522 |
APPARATUS FOR INDICATING A SUPERELEVATION OF A TRACK
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3237584 |
Steering aid assembly
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3193944 |
Magnetic compass for aircraft
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3070895 |
Inclinometer
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3045483 |
Aircraft instrumentation
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2909845 |
Compass
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2864990 |
Automatic pilot
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