ANGULAR ENCODER FOR ZENITHAL ANGLE CODING BETWEEN A VARIABLE DETERMINED DIRECTION AND THE VERTICAL, PARTICULARLY FOR THEODOLITE

摘要

P THE ENCODER INCLUDES A PENDULUM P ROTATING AROUND A HORIZONTAL AXIS O-O MIXED WITH THE REFERENCE AXIS R-R OF AN INDEXED DISC AND WHICH HAS VERTICAL OPTICAL EQUIPMENT T, T; T, T, OPTICAL GUIDANCE MEANS M, M, M, M, M PENDULUM SOLIDARIES SUITABLE FOR GUIDING RADIATION GENERATED BY AN OPTICAL TRANSMITTER T, TOWARDS AN ASSOCIATED RECEIVER T, ACCORDING TO A PREDETERMINED OPTICAL PATH INTERSECTING 11 THE DISC, AND A DEVICE FORMING A LIQUID LEVEL L, SOLIDARITY OF PENDULUM P, AND INTERCALING ON THE OPTICAL ROUTE UPSTREAM OF THE INTERSECTION POINT, BETWEEN SAME AND THE DISC, SAID MEANS OF OPTICAL GUIDANCE M, M, M, M AND THE LIQUID LEVEL DEVICE IS SUITABLE FOR PROVIDING AN ANGULAR DEVIATION OF THE INTERSECTION POINT OF LIGHT RADIATION AND OF THE DISC, RELATIVE TO THE PIVOTING AXIS OO, WHICH COMPENSATES THE ANGULAR GAP BETWEEN THE PENDULUM P AND THE VERTICAL. /P