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| Number | Title | Issue Date |
| 7886451 | Integral electrode tilt sensor and method for making same Fabrication methods are provided for an electrolytic tilt sensor which includes a containment envelope defining an interior space; at least first and second electrodes disposed along, and in contact with, a first interior surface portion of the containment envelope,... | 02/15/2011 |
| 7408626 | Laser transmitter with thermally induced error compensation and method of transmitter compensation The transmitter for projecting a beam of laser light includes a source of a beam of laser light, and a projection arrangement for directing the beam of laser light at a selected grade. The transmitter further includes a temperature sensor for detecting the temperatu... | 08/05/2008 |
| 7370429 | Integrated electronic level device A device adapted to be integrated with a wall hanging for indicating an off-level condition is provided. The device includes a series electrical circuit including a power supply and a signal element connected with the power supply, wherein the signal element is capa... | 05/13/2008 |
| 7353615 | Anti-vibration tilt detector The tilt detector has a container with a receptacle located therein. The receptacle has open and closed ends. In its normal, upright orientation, a first mass is located inside of the receptacle. A second mass is located adjacent to the open end of the receptacle. W... | 04/08/2008 |
| 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 |
| 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 |
| 7228739 | Precision flexure plate A precision flexure plate includes a flat disk positioned between two capacitor plates and supported by S-shaped beams. Deflection of the disk due to gravitational loads and resulting capacitance change is used to measure the accelerations in the direction perpendic... | 06/12/2007 |
| 7190278 | Asset tag with event detection capabilities Described herein are a transient event detector comprising electrical circuitry suitable to detect a transient event, and a container having a wall with at least two electrically conductive contacts that are electrically connected to the electrical circuitry, each o... | 03/13/2007 |
| 7124634 | Single plate capacitive acceleration derivative detector A capacitance accelerometer includes a housing, and a plate fixed within the housing. A moveable plate is disposed in substantially parallel relation to the fixed plate and is coupled to the housing along at least an edge. The moveable plate and the fixed plate defi... | 10/24/2006 |
| 7100294 | Method of sensing tilt, tilt sensor, and method of manufacturing same A method of sensing tilt includes applying an electrical signal, such as voltage, current, a constant signal, or a time-varying signal to at least one electrode of a first set of electrodes and measuring an electrical parameter using at least one electrode of a seco... | 09/05/2006 |
| 7095486 | Laser transmitter with thermally induced error compensation and method of transmitter compensation The transmitter for projecting a beam of laser light includes a source of a beam of laser light, and a projection arrangement for directing the beam of laser light at a selected grade. The transmitter further includes a temperature sensor for detecting the temperatu... | 08/22/2006 |
| 7068053 | Orientation sensor especially suitable for use in an underground boring device An orientation sensor especially suitable for use in an underground device is disclosed herein. This orientation sensor includes a sensor housing defining a closed internal chamber, an arrangement of electrically conductive members in a predetermined positional rela... | 06/27/2006 |
| 7055254 | Tiltsensor An adjustment-free tiltsensor for application in the fields of geodesy, geophysics and geotechnics, with a tilt angle measuring range greater than ±5° to ±10° and an essentially enhanced angular resolution better than 1 microradiant, in which an electrolytic liq... | 06/06/2006 |
| 6987460 | Orientation device Disclosed is an orientation device that may be deployed in a mechanical assembly such as a surveillance camera or enclosure to positively determine the physical orientation and/or attitude (tilt), or any change in such physical orientation and/or attitude, of either... | 01/17/2006 |
| 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 |
| 6903560 | Orientation sensor especially suitable for use in an underground boring device An orientation sensor especially suitable for use in an underground device is disclosed herein. This orientation sensor includes a sensor housing defining a closed internal chamber, an arrangement of electrically conductive members in a predetermined positional rela... | 06/07/2005 |
| 6688013 | Electrolytic-tilt-sensor An electrolytic tilt sensor is disclosed which comprises a containment envelope having a metallic container and a header, the envelope defining a chamber and having at least one pair of apertures, an electrolytic solution partially filling the chamber, an... | 02/10/2004 |
| 6628373 | Laser transmitter with thermally induced error compensation and method of transmitter compensation The transmitter for projecting a beam of laser light includes a source of a beam of laser light, and a projection arrangement for directing the beam of laser light at a selected grade. The transmitter further includes a temperature sensor for detecting th... | 09/30/2003 |
| 6621560 | Laser transmitter with thermally induced error compensation and method of transmitter compensation The transmitter for projecting a beam of laser light includes a source of a beam of laser light, and a projection arrangement for directing the beam of laser light at a selected grade. The transmitter further includes a temperature sensor for detecting th... | 09/16/2003 |
| 6400159 | Orientation sensor especially suitable for use in an underground boring device An orientation sensor especially suitable for use in an underground device is disclosed herein. This orientation sensor includes a sensor housing defining a closed internal chamber, an arrangement of electrically conductive members in a predetermined posi... | 06/04/2002 |
| 6282804 | Continuous monitoring inclination sensor A arcuate resistive sensor element is imprinted upon a ceramic substrate forming a wall of a ceramic body in which an electrolyte, advantageously silver nitrate dissolved in a mixture of methanol, water and butanol, is sealed. To avoid the effects of elec... | 09/04/2001 |
| 6249984 | Electrolytic tilt sensor having a metallic envelope An electrolytic tilt sensor and a method of assembling the tilt sensor. The tilt sensor includes a metallic envelope comprising a metal container and a metal header welded to the enclosure, hermetically sealing the envelope. The envelope defines a chamber... | 06/26/2001 |
| 6123866 | Electrolytic solution for clinometric sensor A pair of upper electrodes are formed on an upper inner surface of a closed container constituting a clinometric sensor and a lower electrode is formed on the bottom of the closed container. An electrolytic solution comprising potassium iodide and a solve... | 09/26/2000 |
| 6066955 | Orientation sensor especially suitable for use in an underground boring device An orientation sensor especially suitable for use in an underground device is disclosed herein. This orientation sensor includes a sensor housing defining a closed internal chamber, an arrangement of electrically conductive members in a predetermined posi... | 05/23/2000 |
| 6032375 | Inclination sensor An inclination sensor includes a container in which an electrolyte liquid and a gas bubble are sealed. The container has a top member with a concave surface having a radius of curvature in a first direction larger than a radius of curvature in a second di... | 03/07/2000 |
| 5937528 | Tilt sensor, mask and coat holder In a tilt sensor including a sealed container which is comprised of a container body and a top cover plate which is adapted to close the container body and is provided on the inner surface thereof with a recess whose depth gradually increases from the per... | 08/17/1999 |
| 5511320 | Angle measurement device employing angle sensor and electronics with lead circuitry integrally formed on a printed circuit board An integral resistive angle measurement device employs a printed circuit board having electronic components mounted on the front surface thereof and having a pair of sensor plates etched into the back surface thereof and a metallic web mounted between the... | 04/30/1996 |
| 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 |
| 5390104 | Adaptive control man-augmentation system for a suspended work station An adaptive control man-augmentation system controls the movement of a suspended work station. A support structure, usually mounted on a chassis, has an extendible boom and a work station at the end of the boom. A directing member pivots in accordance wit... | 02/14/1995 |
| 5381604 | Angle measurement device employing angle sensor and electronics integrally formed on a printed circuit board An integral angle measurement device employs a printed circuit board having electronic components mounted on the front surface thereof and having a pair of sensor plates etched into the back surface thereof. Containment of the sensor fluid adjacent the se... | 01/17/1995 |
| 5351539 | Sensor for measuring acceleration and tilt with a bubble level A sensor is proposed which is used for detecting the acceleration and the inclination of a movable object (10), in particular a motor vehicle. A bubble level (11) is fixed on the object (10). The bubble level (11) comprises a housing (12), a liquid (16) c... | 10/04/1994 |
| 5199712 | Golf swing training apparatus A golf swing training apparatus is disclosed having a housing, a circuit board, a buzzer, a battery, an on/off switch, and a pair of mercury switches. The housing has a clip member extending therefrom with the housing being capable of attachment in a pref... | 04/06/1993 |
| 5144823 | Bend angle indicator A removable attachment for a tube bender or for the tube to be bent for predetermining a selected bend angle to which the tube is to be bent prior to the bending operation. In a first embodiment of the device, an audio and/or visual indicator indicates wh... | 09/08/1992 |
| 5143208 | Level sensor An apparatus for sensing the horizontal level of a table or other surface and returning that table or other surface back to level. The apparatus includes a housing within which first and second mercury switches are positioned relative to each other in a m... | 09/01/1992 |
| 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 |
| 5005308 | Tilt indicator for firearm scopes A firearm scope which is coupled in axial alignment with a firearm barrel includes a number of components. A tubular scope barrel is provided. An objective lens assembly is coupled to one end of the tubular scope barrel for receiving a target image. An er... | 04/09/1991 |
| 4797661 | Motion sensing device This invention relates to a device adapted to sensing motion when powered by passage of an electric current between two electrodes that is comprised of a container partially filled with an electrically conductive liquid along with two electrodes in contac... | 01/10/1989 |
| 4672753 | Rotation sensor A toroidal liquid filled sensor measures rotation with respect to vertical in any plane normal to the earth's surface and comprises a sealed, non-conductive, hollow toroidal housing of square or rectangular cross section with an interior circular cavity o... | 06/16/1987 |
| 4654977 | Electronic level An electronic level having a horizontal and/or a vertical transducer, each of which exhibits an effective impedance that is a function of the deviation of that transducer from a reference plane. Preferably, each transducer is an electrolytic transducer fo... | 04/07/1987 |
| 4574491 | Level with audio indicator A bubble level has at least two position sensing devices, such as mercury switches, disposed at right angles to each other and connected in a circuit having a three-position switch and an audio indicator, such as a buzzer. When the level is to be used to ... | 03/11/1986 |
