Resources Contact Us Home
Three-dimensional optical levelling, plumbing and angle-calibrating instrument

Image Number 4 for United States Patent #5539990.

An optical levelling, plumbing and angle-calibrating instrument includes: a frame; a plumb body universally pendulously mounted on the frame and defining a vertical plumb line gravitationally; at least an illuminator electrically connected to a power supply and mounted on the plumb body for emitting laser light; and at least a cylindrical-surfaced lens mounted on the plumb body in front of the illuminator for planarly diverging the laser light as emitted from the illuminator through the lens to form a laser light plane transverse to a lens axis of the cylindrical-surfaced lens, whereby the laser light plane will projectively intersect an objective wall to form a straight line of optical image, serving as a reference line for levelling or plumbing use.

  Recently Added Patents
Combination of a microorganism and a phytosphingosine derivative, composition, methods of use
Hedge shear
Pelvic registration device for medical navigation
Controller with screen
Blocky hydroxyethylcellulose, derivatives thereof, process of making and uses thereof
Resuming piecewise calibration of a real-time-clock unit after a measured offset that begins at the next calibration period
  Randomly Featured Patents
Reservoir cap
Two pack type curable composition comprising epoxy resin and silicon-containing elastomeric polymer
Test probe with thermally activated grip and release
Thermosetting resin composition and use thereof
Device for adjusting the angle of incidence of a rotor blade of a wind power installation
Metal roof reroofing system and method
Finding relevant documents
Trisubstituted 1,3,5-triazine derivatives
Internal combustion engine dual fuel system
Thermistor element and method of manufacturing the same