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
Method for configuring analog-to-digital converter keys and non-transitory machine readable medium storing program code executed for performing such method
Recovery of a hot-pluggable serial communication link
1,3-diiodohydantoin compound and production method thereof
Motion compensated overlay
Image forming apparatus and control method therefor
Cytokine biomarkers as predictive biomarkers of clinical response for Glatiramer acetate
Philanthropy management apparatus, system, and methods of use and doing business
  Randomly Featured Patents
Injection nozzle having guides for nozzle rod
Methods of making neuraminidase-supplemented compositions
Electron microscope specimen mounting apparatus
Connector assembly having a plurality of discrete components
Ink jet printer method
Nonsaditive antihistaminics derived from benzimidazoles
Cap and substrate electrical connection at wafer level
Method and apparatus for channel allocation integrity in a communication network
Golf ball
Method for isolating the DNA encoding an enzyme