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Surveying machine for construction work

  • US 5,218,770 A
  • Filed: 10/31/1991
  • Issued: 06/15/1993
  • Est. Priority Date: 11/27/1990
  • Status: Expired due to Term
First Claim
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1. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, at least two light sources, each of the two-face reflector members having one light source associated therewith, the light sources each emitting laser light.

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