Laser angle adjustment device for laser measuring instruments

A laser angle adjustment device for laser measuring instruments comprising:

• an elongated aluminum casing having a circular transverse through hole;
• a barrel turned within the circular transverse through hole of said aluminum casing, having an axial hole at the periphery, a spring fixedly secured in said axial hole, and a steel ball supported on said spring and partially projecting out of one side of said casing;
• an annular graduated scale, fixedly mounted on one side of said aluminum casing in alignment with said barrel, having a plurality of locating holes equiangularly spaced around the inner diameter and adapted for receiving said steel ball;
• a top cover mounted with said barrel at one end below and holding a first laser module on the inside, having two screw holes at two opposite locations, a horizontal chamber adapted for holding a second laser module in a horizontal position, and a vertical chamber adapted for holding a laser module in a vertical position;
• and
• an annular index dial fastened to said top cover on the outside around, having two inward projections projecting into the inner diameter, two arches calibration holes respectively made through said inward projections and releasably fixed to the screw holes of said top cover by a respective screw;
• at least one fixed bubble level mounted on said aluminum casing;
• and
• at least one adjustable bubble level mounted on said aluminum casing.