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
Method of manufacturing crystalline silicon solar cells with improved surface passivation
Hybrid asynchronous transmission process
Compound containing a carbon or an oxygen isotope, preparation and use thereof, and composition comprising thereof
Spectrometer
Wiring structure in a semiconductor device, method of forming the wiring structure, semiconductor device including the wiring structure and method of manufacturing the semiconductor device
Fast base station switching method and system, and hierarchical zone-based fast handoff approach
System for determining potential lot consolidation during manufacturing
  Randomly Featured Patents
Apparatus for preventing heat damage in an electromagnetic clutch
Locking arrangement for fixing a terminal block
Phenyl-2 indole derivatives
CPR feedback method and apparatus
NMR polarization monitoring coils, hyperpolarizers with same, and methods for determining the polarization level of accumulated hyperpolarized noble gases during production
System for multi-volume, write-behind data storage in a distributed processing system
Printing apparatus for offset printing, printing belt and printing roller therefor, and method for the manufacture of such a printing belt and printing roller
Method and system for processing customized reward offers
Laser processing method
Method for automatically synchronizing the review of two DSA scenes