Keyboard assembly for accounting machine

Claim 1

IN AN ACCOUNTING MACHINE, DIFFERENTIAL MEANS OPERABLE TO SPACED SETTINGS, A BANK OF KEYS OPERABLE FROM NORMAL POSITIONS TO ACTUATED POSITIONS TO CONTROL THE SETTING OF SAID DIFFERENTIAL MEANS, ZERO STOP MEANS CONTROLLED BY SAID KEYS AND OPERABLE BETWEEN AN INEFFECTIVE POSITION AND AN EFFECTIVE POSITION IN WHICH THE OPERATION OF SAID DIFFERENTIAL MEANS IS ARRESTED, MODE OF OPERATION MEANS OPERABLE TO A PLURALITY OF SETTINGS TO CONDITION SAID MACHINE FOR DIFFERENT MODES OF OPERATION, DRIVE MEANS FOR OPERATING SAID MACHINE THROUGH A CYCLE OF OPERATION, MEANS OPERATED BY SAID DRIVE MEANS DURING ONE PORTION OF EACH CYCLE OF OPERATION FOR CONTROLLING THE MOVEMENT OF SAID ZERO STOP MEANS TO AN EFFECTIVE POSITION, TESTING MEANS OPERATED BY SAID DRIVE MEANS DURING A CYCLE OF OPERATION OF SAID MACHINE FOR DETECTING THE SETTING OF SAID MODE OF OPERATION MEANS, AND MEANS COUPLED TO AND CONTROLLED BY THE TESTING MEANS AND ACTUATED BY THE DRIVE MEANS FOR SELECTIVELY OPERATING SAID ZERO STOP MEANS FROM AN EFFECTIVE POSITION TO AN INEFFECTIVE POSITION DURING DIFFERENT PORTIONS OF A CYCLE OF OPERATION SUBSEQUENT TO SAID ONE PORTION IN ACCORDANCE WITH THE SETTING OF THE MODE OF OPERATION MEANS DETECTED BY THE TESTING MEANS.