Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 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 data processing unit for processing data provided by the receiver and th... | 08/19/2008 |
| 7353614 | Vehicle compass system with continuous automatic calibration The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One suc... | 04/08/2008 |
| 7349805 | Wristop computer and a method in connection with it The invention relates to a wristop computer and a method in connection with a wristop computer (20). The display of the wristop computer intended for a compass application consists of a matrix-display element (1). The wristop computer includes means ( | 03/25/2008 |
| 7340841 | Slope level A slope level for measuring the slope of a surface is provided. The slope level includes a body having a front face and a back face and defining a first planar measurement surface. A transparent arced tube is disposed on the body. The arced tube has a first end and ... | 03/11/2008 |
| 7194814 | Self-balancing, no-spin magnet compass A self-balancing, no-spin magnetic compass. A described embodiment includes a compass card assembly, a retainer assembly, a pivot assembly, a gimbal assembly, a cup, and a dome. The compass card assembly includes an air chamber which provides buoyancy. The retainer ... | 03/27/2007 |
| 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 magnetized compass needle (16) which is attached via a linking m... | 11/14/2006 |
| 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 time in a time mode and directions in a compass mode. In... | 09/26/2006 |
| 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 navigation data, having an input arrangement at least for... | 10/14/2003 |
| 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 the base member to facilitate gripping of the compass, and ... | 09/04/2001 |
| 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 data processing means (12). This timepiece is characterized ... | 02/06/2001 |
| 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 acceleration vector that is equal to the difference of the accelerat... | 11/30/1999 |
| 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.... | 05/12/1998 |
| 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 sources. The spatial components of the magnetic field vec... | 12/23/1997 |
| 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 (42) comprises a device (48) for indicating the direction... | 12/16/1997 |
| 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 compass so as to counteract the compass error, and to indicate... | 10/22/1996 |
| 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 horizontal reference, an adjustable pointer with magnifier... | 11/21/1995 |
| 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 provide for angular deflection relative to a predetermined o... | 02/14/1995 |
| 5383280 | 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.... | 01/24/1995 |
| 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 of the input signal, and the reference pointer in the disp... | 01/17/1995 |
| 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 casing, a needle pointer fastened to a center shaft on the r... | 11/29/1994 |
| 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 received by a display driver (34) which causes an electro... | 12/22/1992 |
| 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 spherical casing (1), the pendulum having rotatably and pivotably ... | 02/25/1986 |
| 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 potentiometers 27 and 29, 90° out of phase. In a second embodiment ... | 12/06/1983 |
| 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 adjustable straight-line cursor is positioned to be aligned with a... | 02/08/1983 |
| 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 bearings comprising a thrust bearing between the hub and th... | 11/09/1982 |
| 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 sensor with respect to the earth's magnetic field, a micro... | 07/27/1982 |
| 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 axes of magnetic response extending normal to one another an... | 03/17/1981 |
| 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 pointer, is provided for adjusting the pointer to any selected... | 01/22/1980 |
| 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 be arranged to suit different viewing angles. To suit diff... | 04/24/1979 |
| 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. Thereafter, the marker will indicate any deviation from the course... | 05/16/1978 |
| 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 substantially constant with respect to vertical. The indicator is... | 04/25/1978 |
| 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 magnetometer or fluxgate sensor is mounted at the end of the... | 07/26/1977 |
| 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 another. Said means being supported by a holder arranged to b... | 08/24/1976 |
| 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 micrometer and is mounted for lateral movement with respect... | 04/06/1976 |
