Printer with detent means on the print motion producing means

Claim 1

A PRINTING MECHANISM COMPRISING A CARRIAGE, MEANS FOR MOUNTING SAID CARRIAGE FOR TRANSLATORY MOVEMENT ALONG A PREDETERMINED PATH, A YOKE PIVOTALLY MOUNTED IN SAID CARRIAGE FOR OSCILLATION ABOUT AN AXIS PARALLEL TO SAID PREDETERMIONED PATH, A FIRST SPLINED SHAFT SECURED TO SAID YOKE AND HAVING AN AXIS EXTENDING PERPENDICULAR TO THE OSCILLATORY AXIS OF SAID YOKE, A TYPE FRONT SLIDABLE ALONG SAID FIRST SPLINED SHAFT AND HAVING INTERNAL SPLINES MATING WITH THE SPLINES OF SAID FIRST SPLINED SHAFT, A SECOND SPLINED SHAFT EXTENDING PARALLEL TO SAID PREDETERMINED PATH AND PASSING THROUGH SAID CARRIAGE, AN INTERNALLY SPLINED SHAFT DISPOSED ABOUT SAID SECOND SPLINED SHAFT AND POSITIONED WITHIN SAID HOUSING, MEANS CONSTRAINING SAID INTERNALLY SPLINED SHAFT TO TRANSLATE WITH SAID CARRIAGE, THE SPLINES OF SAID SECOND AND INTERNALLY SPLINED SHAFTS CONSTRAINING SAID INTERNALLY SPLINED SHAFT TO ROTATE WITH SAID SECOND SPLINED SHAFT, A FIRST GEAR SECURED TO SAID INTERNALLY SPLINED SHAFT, A SECOND GEAR MATING WITH SAID FIRST GEAR AND SECURED TO SAID FIRST SPLINED SHAFT WHEREBY ROTATION OF SAID SECOND SPLINED SHAFT PRODUCES ROTATION OF SAID FIRST SPLINED SHAFT, SELECTION MEANS FOR ROTATING SAID SECOND SHAFT THROUGH A PRESCRIBED ARC AND MULTIPLES THEREOF, SAID GEARS BEING LOCATED ON ONE SIDE OF THE AXIS OF ROTATION OF SAID YOKE, LOCATED ON ONE SAID YOKE IN A DIRECTION SO AS TO PARTIALLY DISENGAGE SAID GEARS AND MEANS FOR DETENTING SAID FIRST SPLINED SHAFT UPON ROTATION OF SAID YOKE.