Step by step linear feed mechanism for photo-type composing machines

Claim 1

IN A PHOTO-TYPE COMPOSING MACHINE IN WHICH CHARACTER IMAGES ARE PROJECTED ON TO A SENSITIZED SHEET TO FORM JUSTIFIED LINES AND INCLUDING A CARRIER MEANS FOR SAID SENSITIZED SHEET AND MEANS FOR DIRECTING SAID IMAGES ON TO SAID SHEET, ONE OF SAID CARRIER MEANS AND SAID IMAGE DIRECING MEANS CONSTITUTING A MOVABLE MEMBER MOVABLE STEPBY-STEP TO POSITION SUCCESSIVELY PROJECTED IMAGES SIDE-BYSIDE; THE PROVISION OF VARIABLE STEP-BY-STEP FEED MECHANISM FOR MOVING SAID MOVABLE MEMBER, SAID MECHANISM COMPRISING AN OUTPUT MEMBER, MEANS CONNECTING SAID OUTPUT MEMBER TO SAID MOVABLE MEMBER FOR MOVEMENT AS ONE THEREWITH, A PLURALITY OF SLIDE MEMBERS, MEANS FOR RECIPROCATING SAID SLIDE MEMBERS WITH A CONSTANT STROKE, A PLURALITY OF FEED RACKS EACH RECIPROCABLE BY ONE OF SAID SLIDE MEMBERS, A PLURALITY OF SELECTOR MEMBERS ONE ASSOCIATED WITH EACH SLIDE MEMBERS AND THE FEED RACK RECIPROCATED THEREBY, MEANS CONNECTING SAID SELECTOR MEMBER TO ONE OF SAID SLIDE MEMBER AND FEED RACK FOR RECIPROCATION THEREWITH, MEANS ON SAID SELECTOR MEMBER ADJUSTABLE TO PRODUCE VARIABLE LOST MOTION BETWEEN SAID SELECTOR MEMBER AND THE OTHER ONE OF SAID SLIDE MEMBER AND FEED RACK, MEANS FOR MOVING SAID ADJUSTABLE MEANS, A PLURALITY OF PINIONS ONE DRIVEN BY EACH OF SAID FEED RACKS AS THE RACK MOVES IN ONE DIRECTION, DIFFERENTIAL MECHANISMS TO COMBINED THE MOVEMENTS OF THE PINIONS, AN OUTPUT SHAFT TO WHICH THE SAID COMBINED MOVEMENTS ARE APPLIED, AND MEANS FOR CONVERTING ROTATION OF SAID OUTPUT SHAFT INTO LINEAR MOVEMENT OF SAID OUTPUT MEMBER.