Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Methods of fabricating semiconductor device
Semiconductor apparatus
Data paths using a first signal to capture data and a second signal to output data and methods for providing data
Display device and method of repairing display device
Business flow processing method and apparatus
Semiconductor device with hetero-junction bodies
Precision geolocation of moving or fixed transmitters using multiple observers
  Randomly Featured Patents
Substituted benzene derivative, liquid crystal composition, and liquid crystal display element
Memory apparatus with a bus architecture
Convertible package/shelf organizer
Data comparator
Arrangement for releasing a fire curtain in a theater
Electronic component cooling system
Salvia plant named `Salv Bule`
Method for rearranging logical volume
4-(arylaminomethylene)-2,4-dihydro-3-pyrazolones
Under pressure gas tank with control of delivered gas flow