Tokyo Kogaku Kikai Kabushiki Kaisha

Hideo Iwai

Akio Kimura

Yasuo Iwafune

Fumitomo Kondo

There is disclosed a rotation axis fine adjustment apparatus for finely adjusting rotation of a mounting portion rotatably mounted on a rotation axis with respect to a base portion through a fastening frame by suitably fastening and finely adjusting the rotation axis. It comprising an outer tube inserted in and fixed to the mounting portion with its end portion projecting outward; an intermediate hollow axial body formed at its outer peripheral surface with a flange portion and at its inner peripheral portion with a female thread portion, and inserted into inside of the outer tube and concentrically secured to the outer tube by screw means with the flange portion abutted against the end portion and other outer tubes kept being spaced apart from the outer tube; a fastening intermediate hollow axial body rotatably attached to an inner side of the outer tube at outside of the intermediate hollow axial body, and fixed at its one end with a fastening control handle; and a fine adjustment axial body formed with a male thread portion for being in threaded engagement with the female thread portion and reciprocally movably attached to an inner side of the intermediate hollow axial body in order to finely rotate the mounting portion, and coaxially fixed at its one end with a fine adjustment control handle with respect to the fastening control handle.

Rotation axis fine adjustment apparatus

A base board device for detachably mounting a measuring instrument such as a transit. The base board device has a centering telescope for locating the base board directly above a point on the ground. The centering telescope has a mark in the eyepiece which defines a viewing axis directed vertically downwardly. In order to determine whether or not the viewing axis as defined by the mark is directed accurately downwardly, the centering telescope is used. To facilitate that use, the base board is formed at the center thereof with an aperture so as to make it possible to observe the vertically downward point through the centering telescope.

Growing community of inventors

Tokyo, Japan

Hideo Iwai