Ribbon positioning arrangement

Claim 1

IN A RIBBON POSITIONING ARRANGEMENT FOR TYPEWRITERS, IN COMBINATION, SUPPORT MEANS; RIBBON POSITIONING MEANS MOUNTED ON SAID SUPPORT MEANS FOR MOVEMENT FROM AN INOPERATIVE POSITION TO FIRST AND SECOND OPERATIVE POSITIONS, RESPECTIVELY, IN WHICH THE HIGHER AND THE LOWER PORTIONS OF A TYPEWRITER RIBBON, RESPECTIVELY, ARE IN A TYPING POSITION, SAID RIBBON POSITIONING MEANS INCLUDING A CAM FOLLOWER; MANUALLY OPERATED SETTING MEANS INCLUDING A SELECTOR LEVER MOUNTED ON SAID SUPPORT MEANS FOR TURNING MOVEMENT BETWEEN FIRST AND SECOND POSITIONS RESPECTIVELY ASSOCIATED WITH SAID HIGHER AND LOWER RIBBON PORTIONS; CONTROL LEVER MEANS MOUNTED ON SAID SELECTOR LEVER FOR TURNING MOVEMENT ABOUT A FIRST AXIS AND BEING FORMED WITH A CAM SLOT RECEIVING SAID CAM FOLLOWER, THE EFFECTIVE RADIUS OF SAID CONTROL LEVER MEANS BETWEEN SAID FIRST AXIS AND SAID CAM FOLLOWER BEING DIFFERENT IN SAID FIRST AND SECOND POSITIONS OF SAID SELECTOR LEVER, SAID CONTROL LEVER MEANS INCLUDING A COUPLING PORTION; OPERATING MEANS INCLUDING AN OPERATING LEVER MOUNTED ON SAID SUPPOORT MEANS FOR TURNING MOVEMENT ABOUT A SECOND AXIS, SAID OPERATING LEVER HAVING A COUPLING ELEMENT COOPERATING WITH SAID COUPLING PORTION, THE EFFECTIVE RADIUS OF SAID OPERATING LEVER BETWEEN IN SAID FIRST AND SECOND SAID SECOND AXIS BEING DIFFERENT IN SAID FIRST AND SECOND POSITIONS OF SAID SELECTOR LEVER; KEY MEANS MOVABLY MOUNTED ON SAID SUPPORT MEANS AND OPERATIVELY CONNECTED WITH SAID OPERATING LEVER FOR TURNING THE SAME; ARRESTING MEANS FOR DETACHABLY ARRESTING SAID SELECTOR LEVER IN SAID FIRST POSITION; FIRST ADJUSTING MEANS MOUNTED ON SAID SUPPORT MEANS AND ACTING ON SAID ARRESTING MEANS FOR ADJUSTING THE POSITION OF THE SAME AND THEREBY SAID FIRST POSITION OF SAID SELECTOR LEVER; AND SECOND ADJUSTING MEANS OPERABLE INDEPENDENTLY OF SAID FIRST ADJUSTING MEANS FOR ADJUSTING SAID SECOND POSITION OF SAID SELECTOR LEVER RELATIVE TO SAID SUPPORT MEANS WHEREBY BY INDEPENDENT ADJUSTMENT OF SAID FIRST AND SECOND ADJUSTMENT MEANS THE STROKE OF SAID RIBBON POSITIONING MEANS TO SAID FIRST AND SECOND OPERATIVE POSITIONS CAN BE ADJUSTED.