Impression control mechanism in power driven typewriters

Claim 1

UNIFORM IMPRESSION CONTROL ADJUSTMENT MECHANISM FOR A POWER DRIVEN TYPEWRITER, COMPRISING: A TYPE ELEMENT ACUTATING ROTATABLE POWER MEMBER HAVING A SPLIT PULLEY MOUNTED ON ONE END THEREOF; CONSTANT SPEED POWER SOURCE MEANS OPERABLY CONNECTED TO SAID PULLEY; A ROTARY MEMBER PROVIDDED WITH A PLURALITY OF INTERNAL TEETH; A MOTION TRANSMITTING MEMBER CONTINUOUSLY OPERATED BY SAID POWER MEMBER AND HAVING A PORTION ARRANGED TO ENGAGE ONE OF SAID INTERNAL TEETH AND THEREBY MOVE SAID MEMBER A PRE-SELECTED ANGULAR DISTANCE FOR EACH REVOLUTION OF SAID POWER MEMBER; MEANS ARRANGED TO BIAS SAID MEMBER INTO ENGAGEMENT WITH SAID TEETH; MEANS OPERATED BY SAID ROTARY MEMBER FOR VARYING THE EFFECTIVE DIAMETER OF SAID SPLIT PULLEY AS SAID ROTARY MEMBER IS ROTATED; AND MEANS FOR SELECTIVELY CONNECTING SAID MOTION TRANSMITTING MEMBER IN DRIVING RELATIONSHIP TO THE INTERNAL TEETH OF SAID ROTARY MEMBER, SAID CONNECTING MEANS INCLUDING A PIVOTED KEY MEMBER AND MEANS BIASING SAID MOTION TRANSMITTING MEMBER TO AN INOPERATIVE POSITION WHEREIN SAID KEY MEMBER PRECLUDES SAID MOTION TRANSMITTING MEMBER BIASING MEANS FROM BIASING SAID MOTION TRANSMITTING MEMBER INTO ENGAGEMENT WITH SAID TEETH, SAID KEY MEMBER BEING SELECTIVELY PIVOTABLE TO AN ALTERNATIVE OPERATIVE POSITION WHEREIN SAID MOTION TRANSMITTING MEMBER BIASING MEANS MAY BIAS SAID MOTION TRANSMITTING MEMBER INTO ENGAGEMENT WITH SAID TEETH.