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| Number | Title | Issue Date |
| 7350305 | Laser activated audible signal emitting leveler This invention pertains to the leveling device applying the optical interaction between a laser beam and a freely floating air bubble confined in a transparent, liquid-filled vial. When the air bubble is impacted by the laser beam, the curved surface of the air-bubb... | 04/01/2008 |
| 7325321 | Method and device for monitoring the alignment of a measuring instrument, and measuring instrument The method and the device serve to monitor the alignment of a measuring instrument, specifically a balance. To perform this function, the monitoring device is equipped with an inclination sensor based on the principle of a spirit level, with a container filled with ... | 02/05/2008 |
| 7322118 | Non-contact electronic level A non-contact electronic level has a light source, a vial having a bubble and positioned to be irradiated by light from the light source, and a photo sensor located at a position corresponding to the bubble at a fixed distance from the vial. The photo sensor capture... | 01/29/2008 |
| 7305771 | Rotation sensor A rotation sensor comprising a Y-shaped strip and a conducting strip is disposed in a digital imaging device. The conducting strip is disposed below the Y-shaped strip. The Y-shaped strip has two sensing arms and a fixed arm. A metal piece is disposed on each of the... | 12/11/2007 |
| 7188426 | Inclination sensor An electronic inclination sensor is provided for the determination and display of surface inclination and the direction of such inclination. The information regarding the inclination and direction of inclination can be displayed such that an end user can readily and... | 03/13/2007 |
| 7182148 | Tool with motion and orientation indicators A tool has a housing; a display unit attached to the housing; and a motion detection unit operably coupled to the housing and to the display unit, wherein the motion detection unit is configured to detect linear and rotational motion of the housing, to generate a fi... | 02/27/2007 |
| 7069662 | Drill level indicator A power tool includes a leveling device which includes a rotatable member which seeks an equilibrium position which corresponds to a level position. A rotating device includes a member which enables passage of a beam. An electrical circuit which includes an emitting... | 07/04/2006 |
| 6944545 | System and method for determining the inclination of a wellbore A well survey system comprising and electronic survey tool for determining the inclination of a wellbore is disclosed herein with methods of use. In some embodiments, the electronic survey tool includes an electrolytic tilt sensor adapted to measure a first tilt ang... | 09/13/2005 |
| 6922063 | Apparatus and method for capacitive level sensor A capacitive sensor including a pendulum for electronically determining an indication of angular offset and a capacitive leveling device having such a capacitive sensor for leveling an associated reference surface. The capacitive sensor detects a difference in capac... | 07/26/2005 |
| 6349477 | Self adjusting inclinometer An inclinometer utilizing synchronous demodulation for high resolution and electronic offset adjustment provides a wide dynamic range without any moving components. A device encompassing a tiltmeter and accompanying electronic circuitry provides quasi-lev... | 02/26/2002 |
| 5930907 | Uniaxial horizontal sensor A uniaxial horizontal sensor wherein factors causing errors are eliminated having high resolution and reproducibility and stability of detection with which a high levelness of inclination angle zero can be secured by attitude control has a construction wh... | 08/03/1999 |
| 5784794 | Sensing device A computer input device. The device is a body containing at least one tube. There is a first conductor in the tube able to move along the tube. Spaced contacts are formed within the tube and conductors extend from the spaced contacts. First interfaces rec... | 07/28/1998 |
| 5761818 | Digital inclinometer An inclination measuring apparatus including a level for measuring the inclination of an object; an LED for creating an image of the level; and a photodiode array for sensing the image of the level and for generating a level signal representative of the i... | 06/09/1998 |
| 5703484 | Roll independent variable inductance inclinometer The pitch sensor of the invention includes a sealed container filled about half full with a magnetic liquid. A pair of coils are wound around the container and produce inductances corresponding to the amount of magnetic liquid disposed within the opening ... | 12/30/1997 |
| 5428902 | Inclinometer sensing circuitry and operation Measurement circuitry for a biaxial inclinometer having electrolytic fluid incorporates a Schmitt trigger for measuring the resistance of each leg of the inclinometer by measuring the frequency output of the Schmitt trigger circuit while each leg is place... | 07/04/1995 |
| 5428219 | Fiber optic inclination detector system having a weighted sphere with reference points A fiber optic inclination detector system for determining the angular displacement of an object from a reference surface includes a simple mechanical transducer which requires a minimum number of parts and no electrical components. The system employs a si... | 06/27/1995 |
| 5416977 | Pitch sensor system A very small pitch sensor which accurately measures angular rotation about he pitch axis while being substantially insensitive to angular rotations about the roll or yaw axes. The pitch sensor comprises a spherical cavity that is fluid filled. The fluid fi... | 05/23/1995 |
| 5376925 | Motion and direction sensors Motion and direction sensors for end of train (EOT) telemetry equipment employ a piezoelectric film as the sensing element. The motion sensor has a mechanical design which is optimized for detecting vibration on a railroad car. The electrical circuitry of... | 12/27/1994 |
| 5313713 | Electronic level with display scale and audible tone scale An electronic level includes a visual display (similar to a ruler scale) having a number of parallel line segments. The inclination of the device is shown by illuminating various of the scale line segments on either side of the central line. When the devi... | 05/24/1994 |
| 5191713 | Electronic tilt measuring system The invention provides an electronic tilt measuring system for measuring the relative tilts of various platforms such as weapons on a ship. The basic system comprises an inclinometer (1) at each platform, a central control and display unit (2) and a compu... | 03/09/1993 |
| 5174033 | Angle sensor for a steerable boring tool A roll sensor is provided for determining the roll angle of a rotatable member. The roll sensor includes a plurality of elements arranged in a predetermined manner, each element having a first state and a second state. A controller controls the respective... | 12/29/1992 |
| 5172481 | Electronic inclinometer A sensor for an inclination measuring device which comprises a capsule (3) part-filled with a conductive liquid. First to fourth electrodes (A-D) are disposed within the capsule in contact with the liquid. An electrical signal is applied between electrode... | 12/22/1992 |
| 5159761 | Electronic level indicator An electronic level indicator, having a housing including at least one planar surface, at least one gravity responsive sensor mounted on the housing, the sensor constituting at least a part of two branches of an electronic bridge circuit, a pulse generato... | 11/03/1992 |
| 5148018 | Laser beam levelling device The laser beam levelling device has a vessel (1) with a U-shaped cross section filled with a dark liquid. A respective photoelectric sensor (2) is located on the exterior of the two free arms of the U. The two sensors (2) are connected to an evaluating de... | 09/15/1992 |
| 5094004 | Railroad track gager/leveler/linear measurer An instrument for measuring railroad track geometry for a pair of tracks. e instrument includes a carriage having wheels for permitting the carriage to ride on one of the tracks. An elongated cross-level bar has one end mounted on the carriage and the oth... | 03/10/1992 |
| 5072615 | Apparatus and method for gauging the amount of fuel in a vehicle fuel tank subject to tilt A vehicle fuel tank gauging apparatus is disclosed comprising sensor means for measuring the amount of fuel in the tank, electronic memory means for storing a signal indicative of the amount, inclinometer means for detecting whether the vehicle is level, ... | 12/17/1991 |
| 5056237 | Electronic indicating device for coaxially aligning a pair of rotary members A machine shaft aligning apparatus includes electronic indicating devices for automatically outputting signals to a computer indicative of the magnitude and direction of radial displacement of two coupled shafts as the coupled shafts are rotated to 4 cloc... | 10/15/1991 |
| 5038137 | Sleep posture monitor and alarm system A sleep posture monitor and alarm system detects one or more of four possible sleep positions and sounds an alarm when an individual wearing the apparatus assumes one or more of the detected positions. In addition, interface units for providing a monitori... | 08/06/1991 |
| 5031330 | Electronic boresight Pairs of level sensing devices are used in a method that aligns plane surfaces to one another. One of the pairs of level sensing devices is located on each of the plane surfaces. The level sensing devices of each pair are aligned and positioned parallel t... | 07/16/1991 |
| 5027522 | Electronic level indicator An electronic level indicator, having a housing including at least one planar surface, a gravity responsive sensor mounted on the housing, the sensor constituting at least a part of two branches of an electronic bridge circuit, a pulse generator coupled t... | 07/02/1991 |
| 5012588 | Self-recording readout system for surface measurement device A data processing system associated with a surface flatness measuring device, distinguishes between differential elevation signals respectively generated by an accelerometer type sensor while at rest and in motion. The readout of time-spaced data is there... | 05/07/1991 |
| 4994741 | Magnetic motion sensing device for sensing inclination and swaying A motion detecting device comprises an encoder for generating two signals of A phase and B phase, 90° out of phase with each other, when a member being measured is subject to an inclination or swaying. A pulse generation section generates a positive puls... | 02/19/1991 |
| 4942668 | Digital inclinometer A digital inclinometer for detecting the angular orientation of a structure includes a rotatable encoding disk on which is mounted a horizontal tilt sensor. The inclinometer electronically measures, by angular indices on the encoding disk, the difference ... | 07/24/1990 |
| 4922620 | Device for determining the inclination of a plane with respect to theoretical horizontal plane The present invention relates to a device for determining the inclination of a plane with respect to a theoretical horizontal plane, including a box-like body defining a base plane. An inclination detector element is rotatably associated with the box-like... | 05/08/1990 |
| 4912662 | Inclinometer An inclinometer 20 has a sensing unit 40 for providing a varying capacitance signal depending on the orientation of the inclinometer 20. An oscillator circuit unit 82 includes the sensor unit 40 as a capacitive element for providing a signal having a peri... | 03/27/1990 |
| 4878297 | Hydrostatic level and elevation measuring device An hydrostatic pressure sensor module is in liquid communication with a body of liquid under ambient atmospheric pressure via an elongated, flexible liquid conduit, the conduit being filled with the liquid. A transducer as a part of the sensor module conv... | 11/07/1989 |
| 4858331 | Method and apparatus for measurement of caster, king-pin-inclination, and camber on motor vehicles A method is disclosed for the correction of errors in the measurement of caster, king-pin-inclination and camber on motor vehicles. Inclinometers are used whereby errors are avoided of the type caused by non-horizontal positioning of the vehicle under tes... | 08/22/1989 |
| 4747216 | Clinometer/accelerometer and method A clinometer includes a cyclindrical cavity having a conductive cylindrical wall and a vertical annular wall having a high resistance resistor uniformly distributed thereon. A freely moving, heavy conductive ball seeks the lowest point in the cavity. The ... | 05/31/1988 |
| 4716534 | Microprocessor based level and angle finder An angle finder (10) and level (40) are disclosed. The level (10) and angle (40) have digital displays (17) which provide a visual, numerical representation of the angular alignment of a reference surface in relation to a gravitational vector. Angle finde... | 12/29/1987 |
| 4694584 | Reduced volume digital inclinometer A high resolution, digital inclinometer having a full 360° linear range with accuracy which is independent of the angle of inclination. The linearity of the inclinometer is essentially flat throughout its range and greatly exceeds analog equivalents. A m... | 09/22/1987 |
