Projection device for projectors with twin lens system

Claim 1

A PROJECTION DEVICE FOR PROJECTORS FITTED WITH A TWIN LENS SYSTEM FOR SIMULTANEOUS PROJECTION OF TWO IMAGES FROM A VERTICALLY PROPELLED FILM BAND, SAID LENS SYSTEM COMPRISING A NUMBER OF LENSES ON ONE SIDE OF THE HORIZONTAL CENTRAL PLANE OF THE LENS SYSTEM FORMING ONE OF THE PORTIONS OF THE TWIN LENS SYSTEM, AND AN EQUAL NUMBER OF CORRESPONDING LENSES FORMING THE OTHER PORTION OF THE SAID TWIN LENS SYSTEM ON THE OPPOSITE SIDE OF THE HORIZONTAL CENTRAL PLANE, POSITIONED IN PAIRS WITH THE FIRST MENTIONED LENSES, EACH PAIR OF LENSES BEING POSITIONED ONE BEHIND THE OTHER, AND THE LENSES BEING IN THE SHAPE OF SEGMENTS IN SIZE SLIGHTLY LARGER THAN HALF LENSES, TWO HOLDERS HAVING THE SHAPE OF APPROXIMATE HALF PORTIONS OF A CYLINDER CARRYING THE LENSES, ONE OF THE HOLDER PORTIONS HOUSING THE LENS SEGMENTS OF ONE SIDE, AND THE OTHER HOLDER PORTION HOUSING THE LENS SEGMENTS OF THE OTHER SIDE, A CYLINDRICAL CASING FIXED TO THE PROJECTOR AND IN WHICH SAID HOLDER PORTIONS ARE SLIDABLY AND ROTATABLY MOUNTED, SAID HOLDER PORTIONS BEING LOCATED WITHIN SAID CASING SO AS TO PROVIDE AN INTERSPACE THEREBETWEEN IN THE HORIZONTAL CENTRAL PLANE, ADJUSTING SCREWS AND TIGHTENING BOLTS COOPERABLE WITH SAID HOLDER PORTIONS FOR ADJUSTING SAID PORTIONS RELATIVE TO EACH OTHER, SAID ADJUSTING SCREWS AND TIGHTENING BOLTS WHILE CROSSING THE INTERSPACE BEING TANGENTIALLY DISPOSED BEYOND THE RANGE OF THE LENS SEGMENTS ON OPPOSITE SIDES OF THE VERTICAL LONGITUDINAL MIDDLE PLANE OF THE LENS SYSTEM, SAID ADJUSTING SCREWS AND TIGHTENING BOLTS BEING ARRANGED IN PAIRS WITH EACH PAIR BEING SET OPPOSITE EACH OTHER ON OPPOSITE SIDES OF THE VERTICAL LONGITUDINAL MIDDLE PLANE OF THE LENS SYSTEM, AND A PAIR OF ADJUSTING SCREWS BEING DISPOSED BETWEEN EACH PAIR OF TIGHTENING BOLTS THEREBY PERMITTING A TILTING ADJUSTMENT AROUND THE ADJUSTING SCREWS OF ONE HOLDER PORTION IN RELATION TO THE OTHER WHILE RETAINING THE OPTICAL AXIS OF EACH HOLDER PORTION IN ONE AND THE SAME VERTICAL PLANE.