Carrier mechanism for proportional escapement typewriter

Claim 1

CARRIER MECHANISM FOR A PROPORTIONAL ESCAPEMENT TYPEWRITER COMPRISING: TYPEWRITER FRAME AND A CARRIER; A SINGLE PRINT ELEMENT HAVING CHARACTERS FORMED THEREON MOVABLY MOUNTED ON SAID CARRIER; CHARACTER SELECTION APPARATUS FOR MOVING SAID PRINT ELEMENT TO BRING A SELECTED CHARACTER INTO PRINTING POSITION; AN ELONGATED LEAD SCREW ROTATABLY SUPORTED IN SAID FRAME; A FOLLOWER MOUNTED ON SAID CARRIER AND ENGAGING SAID LEAD SCREW; A GENERALLY CIRCULAR DISC SHAPED PIN WHEEL CARRYING A PLURALITY OF SPACED PINS LOCATED ADJACENT ONE END OF SAID LEAD SCREW; MEANS DRIVINGLY INTERCONNECTING SAID LEAD SCREW AND SAID PIN WHEEL; EACH OF SAID PINS BEING MOVABLE TO AT LEAST TOW POSITIONS DEFINING AT LEAST TWO STATES; DRIVE MEANS OPERATIVELY COUPLED TO AND LOCATED ADJACENT THE OTHER END OF SAID LEAD SCREW TENDING TO ROTATE THE SAME IN ONE DIRECTION; AN ESCAPEMENT ASSEMBLY COMPRISING PAWL MEANS FOR ENGAGING SAID PINS TO HOLD SAID PIN WHEEL AND SAID LEAD SCREW AGAINST ROTATION BY SAID DRIVE MEANS; MEANS TO SET SELECTED ONES OF SAID PINS AND OPERATE SAID ESCAPEMENT ASSEMBLY IN RESPONSE TO ACTUATION OF SAID CHARACTER SELECTION APPARATUS TO PERMIT SAID LEAD SCREW TO ROTATE AND SAID CARRIER TO ADVANCE BY DISTANCES CORRESPONDING TO THE WIDTHS OF SELECTED CHARACTERS; MEANS TO INITIATE A FUNCTION OPOERATION; MEANS TO REMOVE SAID FOLLOWER FROM ENGAGEMENT WITH SAID LEAD SCREW IN RESPONSE TO INITIATION OF SAID FUNCTION OPERATION; MEANS TO MOVE SAID CARRIER WHEN SAID FOLOWER IS OUT OF ENGAGEMENT WITH SAID LEAD SCREW;