Patent ID: 6901671
Filing Date: 2005-06-07
Classification: G01C

Abstract:
1. A level capable of fine inclination measurement, comprising: a stick member having four rectangular planar members joined along an elongated central axis to form a cross sectional profile of “+”; a base member having a through hole having a center and being connected to the stick member, wherein the base member is bounded by two rectangular planar members, and further wherein the perpendicular axis running through the center of the through hole is perpendicular to the elongated central axis of the stick member; a circular rotatory plate having an insertion axis inserted into the through hole of the base member at its center one side, wherein the circular rotatory plate rotates on the base member; a resilient member provided on the insertion axis, for adhering the rotatory plate to the base member with a given resilient force; a bolt member screwed to the end of the insertion axis in an axis direction, for supporting the resilient member; and an inclination measurement sphere provided at one side of the rotatory plate, wherein the inclination measurement sphere has one side of a flat or semi-spherical shape and the other side of a large radius of curvature being almost flat, and wherein scales of a given distance are indicated on an outer circumferential surface of the inclination measurement sphere.