Means for producing or controlling movements

Claim 1

PHOTOGRAPHIC TYPE COMPOSING APPARATUS IN WHICH SUCCESSIVE LINES OF CHARACTERS ARE PHOTOGRAPHICALLY COMPOSED BY OPTICAL PROJECTION OF THE CHARACTERS SUCCESIVELY ONTO A RADIATION SENSITIVE TAPE, WHICH APPARATUS COMPRISES A TAPE TRANSPORT BAR WHICH MOVES FROM AND TO A FIXED STARTING POSITION TAKING THE TAPE WITH IT DURING ITS RETURN MOVEMENTS TO ADVANCE THE TAPE IN INTERMITTENT STEPS BETWEEN SUCCESSIVE PROJECTIONS OF CHARACTERS, AN OPTICAL PROJECTION SYSTEM FOR PROJECTING A LINEAR DIMENSION SIGNAL ASSOCIATED WITH EACH CHARACTER DURING THE PROJECTION OF THE CHARACTER, A SENSING DEVICE CARRIED BY THE TAPE TRANSPORT BAR FOR SENSING THE PROJECTED SIGNAL DURING THE MOVEMENT OF THE TAPE TRANSPORT BAR OUTWARDLY FROM THE FIXED STARTING POSITION, MEANS ACTUATED BY SAID SENSING DEVICE CONTROLLING THE DISTANCE THE TAPE IS ADVANCED DURING THE RETURNED MOVEMENT OF THE TRANSPORT BAR , AND A SECOND BAR ARRANGED TO BE MOVED IN PARALLEL RELATIONSHIP WITH SAID TAPE TRANSPORT BAR BY MEANS WHICH ARE CONTROLLED BY THE MOVEMENT OF THE TAPE TRANSPORT BAR AND ARE ADJUSTABLE TO MOVE THE SAID SECOND BAR EITHER THE SAME DISTANCE OR DOUBLE THE DISTANCE THE TRANSPORT BAR MOVES, THE SECOND BAR CARRYING A SECOND SENSING DEVICE SPACED FROM THE SAID FIRST-MENTIONED SENSING DEVICE A DISTANCE EQUAL TO THE SELECTED LENGTH OF LINE.