Patent ID: 6351890
Filing Date: 2002-03-05
Classification: G01C,Y10S

Abstract:
A laser light referencing tool comprising laser means for emitting a visible laser beam, portable power means for powering the laser means, and gravity-responsive directional means for establishing a datum direction for the laser means, wherein control means is provided for operatively linking the laser means to the gravity-responsive directional means, whereby the direction of the visible laser beam emitted by the laser means relatively to the datum direction established by the gravity-responsive directional means can be selectively altered, to give a chosen angle between the direction of the visible laser beam and the datum direction, with subsequent movement of the directional means in response to gravity automatically causing simultaneous self-adjusting of the direction of the visible laser beam emitted by the laser means to maintain said chosen angle between the direction of the visible laser beam and the datum direction.