Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7386942 | Method and apparatus for mapping the trajectory in the subsurface of a borehole An apparatus for determining the orientation of a borehole at a point along the borehole, includes a tiltmeter for measuring the inclination of the borehole relative to the vertical, a vector magnetic sensor for measuring the amplitude of the component of the Earth'... | 06/17/2008 |
| 6227310 | Method and apparatus for providing a magnetic direction reference A magnetic observatory device is deployed at a fixed location such as the sea bed to provide data measuring variations in the local earth magnetic field. This data is used to correct information from magnetic direction sensors, for example in a measuremen... | 05/08/2001 |
| 6176128 | Borehole tilt meter A devised tilt meter detects tilt of the receptacle installed in the ground and/or in the solid construction, to detect the displacement of a pendulum suspended by thin metal springs. A cavity exists near the middle of the receptacle with a pendulum, the ... | 01/23/2001 |
| 5258755 | Two-source magnetic field guidance system A magnetic field guidance system for guiding a movable carrier such as a drill assembly with respect to a fixed target includes a pair of magnetic field sources at one location, such as the carrier, and a highly sensitive magnetic field detector at the ot... | 11/02/1993 |
| 5201128 | Miniature gimbal mounted magnetic field detectors A miniaturized electronic magnetic compass system, or the like, is mounted in a substantially cylindrical gimbal ring unit of about 0.75 in diameter, and 1.25 in length. Critical to the small size is the pendulum that positions the internal magnetic detec... | 04/13/1993 |
| 4747317 | System for surveying fluid transmission pipelines and the like A pipeline survey pig including an onboard inertial reference unit and signal processing units for receiving acceleration and angular velocity signals generated by the inertial reference unit, calculating resultant values of angular velocity and accelerat... | 05/31/1988 |
| 4157619 | Inclination and direction responsive apparatus An inclination responsive device including a coil energized to produce a magnetic field extending along a normally vertical axis of the device, and a flux gate assembly adapted to respond to a horizontal component of that field upon tilting movement of th... | 06/12/1979 |
