Platen indexing mechanism

Claim 1

IN AN ELECTRIC TYPEWRITER HAVING A ROTATABLE PLATEN INCLUDING A PLATEN SHAFT, A CONSTANTLY ROTATING POWER SHAFT AND A TRAVERSABLE CARRIAGE HAVING SIDE FRAMES ON WHICH THE PLATEN SHAFT IS MOUNTED, THE COMBINATION OF, AN INDEXING RATCHET CONNECTED TO SAID PLATEN, ROCKABLE PAWL MEANS MOUNTED ON SAID PLATEN SHAFT AND ENGAGEABLE WITH SAID RATCHET TO INDEX SAID PLATEN STOP MEANS TO LIMIT INDEXING MOVEMENT OF SAID PAWL MEANS, AN INDEXING LEVER ROCKABLY MOUNTED ON SAID PLATEN SHAFT, RESILIENT DRIVING MEANS INTERCONNECTING SAID PAWL MEANS AND SAID INDEXING LEVER WHEREBY SAID INDEXING LEVER IS OPERABLE TO DRIVE SAID PAWL MEANS AND IS ALSO MOVABLE RELTAIVE THERETO WHEN SAID PAWL AND MEANS HAS REACHED THE LIMIT OF ITS INDEXING MOVEMENT, A DRAWBAND REEL FREELY MOUNTED ON SAID POWER SHAFT, A CLUTCH ASSOCIATED WITH SAID REEL AND SAID POWER SHAFT, A DRAWBAND HAVING ONE END CONNECTED TO SAID LEVER AND FRICTIONALLY COUPLE WITH SAID INDEXING LEVER WHEREBY UPON ENGAGEMENT OF SAID CLUTCH SAID DRAWBAND IS WOUND ON SAID REEL FIRST, TO ROCK SAID INDEXING LEVER TO INDEX THE PLATEN UNTIL SAID PAWL MEANS REACHES THE LIMIT OF ITS INDEXING MOVEMENT AND THEREAFTER TO IMPART OF ITS INDEXING TO SAID CARRIAGE, A MARGIN BAR RESILIENTLY MOUNTED ON SAID CARRIAGE SIDE FRAMES FOR LIMITED LONGITUDINAL MOVEMENT FROM AND TO A NORMAL POSITION RELATIVE TO SAID CARRIAGE AND HAVING A LEFT HAND MARGIN STOP ADJUSTABLY MOUNTED THEREON, A CAM MEMBER ROTATABLY MOUNTED ON ONE OF SAID SIDE FRAMES AND ENGAGEABLE WITH SAID MARGIN BAR, SAID CAM MEMBER INCLUDING A BY-PASS ARM ENGAGEABLE BY SAID INDEXING LEVER UPON INDEXING MOVEMENT THEREOF TO ROTATE SAID CAM MEMBER THEREBY TO MOVE SAID MARGIN BAR LONGITUDINALLY IN A CARRIAGE RETURN DIRECTION RELATIVE TO SAID CARRIAGE, AND MEANS OPERABLE BY SAID LEFT HAND MARGIN STOP UPON SUCH LONGITUDINAL MOVEMENT OF SAID MARGIN BAR TO DISENGAGE SAID CLUTCH AT THE COMPLETION OF PLATEN INDEXING TO THEREBY PRECLUDE RETURN MOVEMENT OF SAID CARRIAGE DURING REPEAT INDEXING OF SAID PLATEN.