Laser plumb line

摘要

A laser is pivotally concentrically mounted in a gimballed mounting structure having outer and inner pivotally mounted concentric rings. An angle indicator is mounted to said outer ring so as to be viewable by a user and cooperates with said inner ring to as to indicate to said user an angle of inclination of said gimballed mounting structure when lowermost ends of said legs are placed on a solid surface. A generally elongate linearly calibrated gauge is mounted to a base between said legs of the structure so as to extend between said legs beneath a lowermost end of said laser. The gauge is graduated so that a first angle gradation, may be aligned with a mark to be transposed on said solid surface. With said gauge aligned generally perpendicularly to a line of constant elevation on said solid surface if said solid surface is sloped, and with said mark to be transposed aligned with said first angle gradation on said gauge and with said first angle gradation corresponding to said angle of inclination indicated by said angle indicator, said lowermost end of said laser housing may be manually grasped by said use to rapidly damp and cease oscillatory swinging of said laser housing about said first axis of rotation, so as to rapidly indicate an overhead illuminated mark on an overhead surface where said light beam intersects said overhead surface, thereby vertically transposing said mark to be transposed.