Detent controlling mechanism

Claim 1

IN A MACHINE OF THE CLASS DESCRIBED, CONSTRUCTED AND ARRANGED TO PERFORM A MACHINE OPERATION, THE COMBINATION OF (A) A PLURALITY OF DIFFERENTIALLY-SETTABLE MEMBERS; (B) A PLURALITY OF KEYS MOUNTED ON A KEYBOARD INCLUDING A FIRST SET OF KEYS FOR CONTROLLING THE EXTENT OF MOVEMENT OF THE SETTABLE MEMBERS DURING EACH MACHINE OPERATION; (C) A PLURALITY OF DETENT MEMBERS SLIDABLY MOUNTED IN SAID KEYBOARD, SAID DETENT MEMBERS DISABLING SAID PLURALITY OF KEYS WHEN MOVED TO A FIRST POSITION; (D) MEANS FOR MOVING SAID DETENT MEMBERS TO SAID FIRST POSITION DURING EACH MACHINE OPERATION INCLUDING (E) A SHAFT MOUNTED ADJACENT SAID PLURALITY OF DETENT MEMBERS; (F) MEANS INTERCONNECTING EACH OF SAID DETENT MEMBERS WITH SAID SHAFT, WHEREBY, UPON ROTATION OF SAID SHAFT, EACH OF SAID DETENT MEMBERS IS MOVED TO SAID FIRST POSITION; (G) A PAIR OF CYCLE CONTROL ACTUATING MEANS OPERATED DURING EACH MACHINE OPERATION; (H) MEANS FOR ACTUATING SAID SHAFT WHEN OPERATED INCLUDING A YOKE MEMBER HAVING A STOP PORTION; (I) A LINK ASSEMBLY HAVING TWO MEMBERS RESILIENTLY CONNECTED, SAID ASSEMBLY BEING ACTUATED BY ONE OF SAID CYCLE CONTROL MEANS DURING THE FIRST PART OF A MACHINE OPERATION TO YIELDINGLY ENGAGE ONE OF SAID LINK MEMBERS AGAINST SAID STOP PORTION; (J) A SECOND LINK ACTUATED BY THE OTHER OF SAID CYCLE CONTROL ACTUATING MEANS FOR OPERATING SAID SHAFT ACTUATING MEANS THEREBY MOVING EACH OF SAID DETENT MEMBERS TO SAID FIRST POSITION, SAID OPERATION OF