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| Number | Title | Issue Date |
| 7409312 | Handheld laser light detector with height correction, using a GPS receiver to provide two-dimensional position data A laser light receiver is provided with an integral laser distance measurement (LDM) device for measuring the distance from a laser plane of a desired elevation to a desired physical target point to be measured on a jobsite. The laser receiver can be combined with a... | 08/05/2008 |
| 7367129 | Hand-held laser level with retractable adhesive-type retention feature A leveling or plumbing device for indicating a line or a plane on a surface, such as wall or floor. The device includes a light beam generator that emits a light beam exteriorly of a body or housing. Level and/or plumb indicators, such as vials, are mounted to the h... | 05/06/2008 |
| 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 |
| 7342504 | Monitoring system and method A monitoring system includes one or more monitoring devices, positioned in sewer manholes, storm drains, etc., and a remote monitoring station that communicates wirelessly therewith. The monitoring device may be an integrated unit, including sensors, a two-way telem... | 03/11/2008 |
| 7299557 | Tilt sensor A tilt sensor has a source for optical radiation, a pattern support having an optically effective pattern for the passage of the optical radiation generated by the source, a tilt-sensitive unit downstream of the pattern support in the direction of propagation of the... | 11/27/2007 |
| 7181854 | Laser leveling device having a suction mounting arrangement A laser leveling device having a suction mounting arrangement includes a housing and a mounting seal extending from the lower portion of the housing. The mounting seal cooperates with an attachment surface to define a suction mounting area therebetween. The suction ... | 02/27/2007 |
| 7117608 | Spirit level A spirit level comprising a body having a level face for setting a surface, at least one bubble vial mounted in the body, the bubble vial having a longitudinal axis generally perpendicular to the level face, and an optical transfer element fixed to the body which tr... | 10/10/2006 |
| 7002481 | Monitoring system and method A monitoring system includes one or more monitoring devices, positioned in sewer manholes, storm drains, etc., and a remote monitoring station that communicates wirelessly therewith. The monitoring device may be an integrated unit, including sensors, a two-way telem... | 02/21/2006 |
| 6675489 | Laser sighting device The present invention provides a laser sighting device, which comprises a tilt detecting device having a liquid member for forming a free liquid surface and a fixed reflection member fixedly mounted, the tilt detecting device being used for detecting angu... | 01/13/2004 |
| 6649927 | Tilt detecting device A tilt detecting device for detecting tilt by a reflection light from a free liquid surface, comprising a photodetection element, a liquid member for forming the free liquid surface, a fixed reflection member fixed on a structural member, a free liquid su... | 11/18/2003 |
| 6625895 | Servo-controlled automatic level and plumb tool A method and apparatus for leveling at least one output light beam in a construction tool. One embodiment of the apparatus includes a laser optical assembly for producing output light beams that define plumb, level, and right angle beams for use in constr... | 09/30/2003 |
| 6410932 | Radiation-sensitive-device based level An apparatus including an enclosure having an interior surface and an exterior surface; a first radiation sensor coupled to the interior surface being configured to produce a first signal dependent on the radiation sensed by the first radiation sensor; a ... | 06/25/2002 |
| 6384913 | Active compensator damping in laser transmitters A laser transmitter is provided including a specialized compensator assembly damping mechanism. In accordance with one embodiment of the present invention, a compensator assembly position detector is arranged to detect a position X1 of the comp... | 05/07/2002 |
| 6324455 | Laser level selection The apparatus and the system for precise vertical navigation of a grading machine in profile of a curved job site terrain is disclosed. The system includes an integrated satellite navigational receiver and a laser detector system. A plurality of laser sys... | 11/27/2001 |
| 6248989 | Tilt detecting device The tilt detecting device of the present invention comprises a light transmission type electric bubble tube, a light source for emitting detection light to the electric bubble tube, a photodetector element for detecting emitted light amount for detecting ... | 06/19/2001 |
| 6204498 | Inclination sensor and surveying instrument using the same The present invention relates to an inclination sensor which utilizes a liquid member having a free surface. A first optical system collimates light emitted from a light source, a dark field pattern allows the light from the first optical system to pass t... | 03/20/2001 |
| 6137568 | Optical axis compensator The present invention provides an optical axis compensator, which comprises a liquid sealing container 1 with a transparent liquid 14 sealed therein so as to form a free liquid surface 2, an optical axis compensating unit 44 for allowing a light beam to p... | 10/24/2000 |
| 6128076 | Apparatus for measuring truck tilt and preventing roll-over An apparatus for measuring side-to-side tilt of vehicles such as trucks, trailers and the like that elevate one end of a bin to dump material therefrom. A curved transparent tube filled with liquid except for one gas bubble is mounted on the vehicle. A se... | 10/03/2000 |
| 5959729 | Automatic tilt angle compensator An automatic tilt angle compensator, which comprises a sealed container for sealing at least two types of liquids to form a free interface, a light projecting system arranged to project a light beam through the free interface, an entry window for allowing... | 09/28/1999 |
| 5953116 | Tilt detecting device A tilt detecting device of the present invention comprises a bubble tube 21, a light emitting element 22 for emitting detection light and photodetector elements 23 and 24 arranged opposite to each other with the bubble tube therebetween, and at least a li... | 09/14/1999 |
| 5946087 | Laser survey instrument The present invention provides a laser survey instrument, which comprises a rotary irradiation system main unit and an object reflector, wherein said object reflector has reflection sectors divided into two or more, at least one of the reflection sectors ... | 08/31/1999 |
| 5893215 | Inclination sensor and surveying instrument using the same The present invention relates to an inclination sensor capable of detecting inclinations in two X- and Y- axis directions with use of only a single linear sensor. In this inclination sensor, a first optical system collimates the light emitted from a light... | 04/13/1999 |
| 5847824 | Automatic angle compensator An automatic angle compensator comprising a liquid sealing container 4 having transparent liquid to form a free liquid surface 1 sealed therein, light projecting systems 21 and 22 for projecting light at a given angle to the free liquid surface, and an op... | 12/08/1998 |
| 5844679 | System for adjusting the orientation of a plane of laser light A system for adjusting the orientation of a plane defined by a rotating laser beam from a laser transmitter is provided. The laser beam is swept across one or more targets having a plurality of sections. The targets each include a first reflective section... | 12/01/1998 |
| 5684579 | Automatic tilt angle compensator The automatic tilt angle compensator of the present invention includes a liquid sealing container with a transparent liquid sealed therein to form a free liquid surface, a light projecting system for projecting light beam to the free liquid surface at a g... | 11/04/1997 |
| 5682233 | Interstitial fluid sampler A sampling apparatus for sampling interstitial fluid includes a sampler having an external geometry selected to mate with an internal geometry of a testing apparatus such that the sampler may be inserted within the testing apparatus in a predetermined ali... | 10/28/1997 |
| 5636018 | Laser beam survey instrument having a tiltable laser beam axis and tilt detectors According to the present invention, fixed tilt detectors are fixed in planes crossing perpendicularly to each other of shaft center of a laser projector, and tilting tilt detectors are mounted on a plate, which is tiltable with respect to shaft center of ... | 06/03/1997 |
| 5513001 | Tilt angle automatic compensator in all directions A tilt angle automatic compensator used for a device requiring verticality or horizontality is disclosed. The automatic compensator comprises a container 4 where a transparent liquid to form free liquid surface 1 is sealed, a light projection system for p... | 04/30/1996 |
| 5485266 | Laser beam survey instrument having a tiltable laser beam axis and tilt detectors According to the present invention, fixed tilt detectors are fixed in planes crossing perpendicularly to each other of shaft center of a laser projector, and tilting tilt detectors are mounted on a plate, which is tiltable with respect to shaft center of ... | 01/16/1996 |
| 5392112 | Inclination angle metering apparatus An inclination angle metering apparatus is arranged such that a beam from a light source is split into two beams by a half-mirror provided in a light path between the light source and the surface of a liquid. One beam is reflected by the liquid surface fa... | 02/21/1995 |
| 5371951 | Two-axis inclinometer A two-axis inclinometer having an inclination-sensitive ray-deflecting device is described, via which a geometrical figure having at least one angle is projected onto a linear array. In addition to providing high resolution, a large measurement range is a... | 12/13/1994 |
| 4993162 | Apparatus for measuring inclinations of a component The apparatus comprises a stable carrier plate for carrying prisms cemented thereto and conducting an optical ray path from its source to a position sensitive photoelectric receiver. A liquid horizon is provided on the carrier plate for shifting the optic... | 02/19/1991 |
| 4988193 | Method and apparatus for measuring incident light angle relative to level Apparatus operable in accordance with the method of the present invention for measuring the angle of incidence of a light beam or plane relative to level comprises a photodetector array for sensing the light and a level mirror preferably comprising a pool... | 01/29/1991 |
| 4970629 | Headlamp assembly A headlamp assembly having a retainer member supporting a rectangular lamp unit and provided with a level device that is capable of being adjusted relative to the retainer member by a screw located between one of the sections of the retainer member and th... | 11/13/1990 |
| 4902129 | Orientation indicator for a flexible fiberscope or endoscope including method of manufacture An orientation indicator is disclosed for observing or reading the orientation of the distal end of an endoscope or of a fiberscope having an elongated flexible shaft relative to the proximate end thereof where the flexible shaft the fiber optic bundles o... | 02/20/1990 |
| 4869590 | Geodetic instrument The invention relates to a geodetic instrument with a telescope, an objective with a reticle in the focal plane, a clinometer and optoelectronic elements with the objective of avoiding faulty measurements due to a vibrating or oscillating target image, as... | 09/26/1989 |
| 4802067 | Headlight aiming and leveling device A headlamp aiming and leveling device is provided for attachment to an automotive headlamp to facilitate leveling and aiming of the headlamp beam relative to an automotive vehicle upon which the headlamp is installed. The device comprises: a level-indicat... | 01/31/1989 |
| 4794495 | Headlamp assembly A headlamp assembly having a retainer ring for supporting a lamp unit and which includes a level device that allows the lamp unit to be readily aimed about a horizontal axis.... | 12/27/1988 |
| 4666299 | Inclination measuring apparatus having a prism with associated liquid container An inclination measuring apparatus having a prism and a container having a liquid sealed therein for providing a liquid surface perpendicular to the direction of gravity. A member constructed from thermal conductive material is position under the liquid s... | 05/19/1987 |
| 4441818 | Deflection unit A deflection unit on a path parallel to a light beam has a rider, which grips the track of a measuring guide (not shown) and permits a beam component to pass while deflecting a component. A levelling means is provided on a line bisecting the angle between... | 04/10/1984 |
