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| Number | Title | Issue Date |
| 8141259 | Method of determining the dip of a formation A method of determining the dip or apparent dip of a section of a subterranean formation is described using the measurements of a borehole gravity meter and a dip-dependent model for the response of the gravity meter. ... | 03/27/2012 |
| 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 |
| 7162807 | Geomagnetic sensor having a dip angle detection function and dip angle detection method therefor A geomagnetic sensor supporting a dip angle detection function. The geomagnetic sensor includes a rotation angle measurement part for measuring pitch and roll angles of the main body with respect to the surface of the Earth; a geomagnetic measurement module for outp... | 01/16/2007 |
| 7086164 | Method and device for measuring directional, and computer program A method for measuring a directional of a body in a three-dimensional space defined by an X-axis (magnetic north), a Y-axis, and a Z-axis is proposed. A geomagnetic force along an x-axis, which is the direction towards which the body points and an x-axis tilt angle,... | 08/08/2006 |
| 6962001 | Magnetic north detecting device and magnetic north detecting method The magnetic north detecting device comprises: a 3-dimensional geomagnetism sensor unit including three geomagnetism sensors for detecting respective components of a geomagnetism magnetic field intensity in respective directions of three coordinate axes perpendicula... | 11/08/2005 |
| 6957156 | Method for searching for dip angle using tilt-compensated electronic compass A method of finding a dip angle in a tilt-compensated electronic compass includes the steps of a) setting a predetermined azimuth angle indicative of a horizontal status of a geomagnetic sensor to a reference azimuth angle; b) if the compass is slightly tilted, step... | 10/18/2005 |
| 6739063 | Combination compass A combination compass. The compass includes a housing, a compass device mounted inside the housing, a top cover pivoted to one end of the housing and capable of covering over the compass device. The top cover has a mouthpiece, a resonance chamber, an air passage con... | 05/25/2004 |
| 6701631 | Convertible directional azimuth and dip measuring modular compass and method A compass adapted to measure direction and dip values with or without the assistance of the earth's magnetic field. A laser pointer module and a magnetic needle module are interchangeably arranged in a body having an attached reference angle plate appropr... | 03/09/2004 |
| 6665944 | Magnetic marine compass A self-balancing marine compass. A described embodiment includes a pivot assembly, a buoyant-magnetic chamber assembly, a reading card assembly, and a dome. The pivot assembly includes fulcrums, each of which fit within fulcrum holders located on an inner... | 12/23/2003 |
| 6516526 | Pocket transit A transport for measuring strikes and dips. The transport includes a locking mechanism for locking the needle assembly n place. The needle assembly can be momentarily released to allow a measurement to be made, and then locked to allow the measurement to ... | 02/11/2003 |
| 5086568 | Geological gyrocompass The geological gyrocompass is an accurate, portable instrument useful for geologic mapping and surveying which employs an aircraft gyrocompass, strike reference bars, a pair of sights and leveling devices for horizontally leveling the instrument. A clinom... | 02/11/1992 |
| 5035060 | Method of mapping underground mines A method wherein a light emitting device, such as a laser, is used to precisely measure strike measurements of planar geologic features; for example, bedding planes, fractures, or fold axes. A pre-existing survey line between two spads is first located on... | 07/30/1991 |
| 4462094 | Method and apparatus for determining angle of inclination of seismometer and leveling seismic motion detectors A geophone is hung from a ball bearing in a pendular fashion so that it is free to swing in any direction. Because it is weighted, it will assume the correct positioning for operation. A clamp, carried with the pendular geophone in a seismometer designed ... | 07/24/1984 |
| 4092779 | Device for determining angle relationships of or between planes A device for determining angle relationships of or between planes, such as in geological structures, having a first member having on a planar surface thereof a family of concentric circles indicative of angles from the range 0° to 90°, the circles each ... | 06/06/1978 |
