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 lowe rmost ends of said legs are placed on a solid surface. A generally elongate linearly calibrate d gauge is mounted to a base between said legs of the structure so as to extend between said legs b eneath a lowermost end of said laser. The gauge is graduated so that a first angle gradation, may b e aligned with a mark to be transposed on said solid surface. With said gauge aligned generally p erpendicularly to a line of constant elevation on said solid surface if said solid surface is s loped, 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 ang le indicator, said lowermost end of said laser housing may be manually grasped by said use to rapid ly damp and cease oscillatory swinging of said laser housing about said first axis of rotati on, so as to rapidly indicate an overhead illuminated mark on an overhead surface where said light be am intersects said overhead surface, thereby vertically transposing said mark to be transposed .