Patent ID: 6968626
Filing Date: 2005-11-29
Classification: G01C

Abstract:
1. A level adapted for use in limited spaces having a reference surface; a vial of fluid containing a bubble and having a flat lower surface disposed in contact with said reference surface, said vial being adapted to center said bubble when said reference surface is level and when said vial is oriented at any azimuthal angle; a prism having a 45 degree surface disposed above said vial and oriented to direct an image of said vial along a substantially horizontal line of sight; further comprising adjusting means in contact with said reference surface and said prism for adjusting the orientation of said prism to tilt said line of sight in a vertical plane, said adjusting means being rotatable about an axis substantially perpendicular to said reference surface while said vial is fixed, whereby said line of sight may be oriented at any azimuthal angle.