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
End to end email monitor
Generating agricultural information products using remote sensing
Semiconductor devices having through electrodes and methods of fabricating the same
Motor device and method of manufacturing the same
Pyridyldiamido transition metal complexes, production and use thereof
Inhibitors of bacterial tyrosine kinase and uses thereof
Efficient implementation of hash algorithm on a processor
  Randomly Featured Patents
Picture display device with microlens array and beam refracting element array on each side or opposite reflector
Apparatus for feeding a developing agent through a device for developing an electrostatic latent image
Method and system for establishment and maintenance of a global formation of directionally-fixed spacecraft without the use of expendable mass
Compact structural CT detector module
Control apparatus for internal combustion engine
Sailboard gooseneck
Display frame for baseball cards and the like, method of making, and blank therefor
Process for isocyanurating hexamethylene-diisocyanate using a sodium or potassium carboxylate catalyst and a paint composition comprising the product of said process and polyols
Storage container for disk-shaped object
Re-configurable antenna and a method for acquiring a configuration of a re-configurable antenna