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
Display sheet, display device, and electronic apparatus
Optoelectronic semiconductor chip and method for manufacturing a contact structure for such a chip
Filler containing composition and process for production and use thereof
Vapor phase decarbonylation process
Modulators of cystic fibrosis transmembrane conductance regulator
Piezoelectric quasi-resonance linear motors based on acoustic standing waves with combined resonator
Compositions and methods for concentrating and depleting microorganisms
  Randomly Featured Patents
Recording medium
Zoom lens
Device for introducing particulate material
Method and system for routing text based interactions
Diaphragm operated float controlled valve
Secure housing
Inlet valve mechanism for a toilet tank
Water well pump
Sealed surgical access device
Transmission cable