Rectifiers for differential strip-by-strip rectification of aerial photographs

Claim 1

A RECTIFIER FOR DIFFERENTIAL STRIP-BY-STRIP RECTIFICATION OF AERIAL PHOTOGRAPHS, COMPRISING AT LEAST ONE COLUMN, A PROJECTION SYSTEM CONNECTED TO SAID COLUMN AND CONSISTING OF AN IMAGE PLANE, A PROJECTION OBJECTIVE AND A PROJECTION PLANE, AT LEAST TWO OF SAIDPARTS OF SAID PROJECTION SYSTEM BEING DISPLACEABLE RELATIVELY TO EACH OTHER ALONG SAID COLUMN AND INCLINABLE TO EACH OTHER ABOUT TWO AXES AT RIGHT ANGLES TO EACH OTHER, ONE OF SAID AXES OF SAID TWO PARTS BEING AT RIGHT ANGLES TO SAID COLUMN, FIRST MEANS FOR DISPLACING SAID TWO PARTS, TWO BLINDS PARALLEL TO SAID PROJECTION PLANE AND IN CLOSE VICINITY THERETO, THE ONE OF SAID BLINDS BEING FIXED TO A PROJECTION TABLE AND EXTENDING PARALLEL TO SAID ONE AXIS AND AT RIGHT ANGLES TO SAID COLUMN AND FORMING A FIRST SLIT EXTENDING AT RIGHT ANGLES TO SAID ONE AXIS, THE OTHER OF SAID BLINDS BEING FIXED TO SAID ONE BLIND AND COVERING SAID FIRST SLIT AND FORMING A SECOND SLIT PARALLEL TO SAID ONE AXIS, A SYSTEM OF CROSS-SLIDES FOR DISPLACING SAID SECOND SLIT PARALLEL TO SAID PROJECTION TABLE AND PARALLEL AND AT RIGHT ANGLES TO SAID ONE AXIS, A BEVEL PROTRACTOR, THE ONE LEG OF SAID BEVEL PROTRACTOR BEING STATIONARY, THE OTHER LEG OF SAID BEVEL PROTRACTOR BEING MOUNTED ON THE SAID ONE LEG FOR ROTATION ABOUT AN AXIS AT RIGHT ANGLES THERETO, A FIRST ROD AT RIGHT ANGLES TO AND ENGAGING SAID ONE LEG, SAID FIRST ROD BEING DISPLACEABLE ON SAID ONE LEG AT A DISTANCE FROM THE AXIS OF ROTATION OF SAID OTHER LEG, SAID DISTANCE DEPENDING ON THE PHOTOGRAPHIC FOCAL LENGTH AND THE IMAGE INCLINATION, A SECOND ROD PARALLEL TO SAID FIRST ROD, SAID SECOND ROD BEING DISPLACEABLE ALONG SAID ONE LEG AT A DISTANCE EQUAL TO THE RECTIFICATION FOCAL LENGTH AND BEING CONNECTED TO SAID OTHER LEG, SECOND MEANS FOR TRANSMITTING THE HORIZONTAL DISPLACEMENTS FROM SAID STEREOPLOTTER TO SAID SYSTEM OF CROSS-SLIDES, AND THIRD MEANS FOR TRANSMITTING VERTICAL DISPLACEMENT FROM A STEREOPLOTTER TO SAID FIRST ROD, SAID SECOND ROD ACTING ON SAID FIRST MEANS.