Electrically powered keyboard and transfer mechanism for ten key adding or calculating machine

Claim 1

A CALCULATING MACHINE COMPRISING A SERIES OF NUMERAL KEYS, A SERIES OF TOOTHED TRANSFER WHEELS MOVABLE FROM A NORMAL INOPERATIVE POSITION TO A SINGLE OPERATIVE POSTION, MEANS FOR SETTING UP NUMERALS IN THE SUCCESSIVE TRANSFER WHEELS IN THE OPERATIVE POSITION ACCORDING TO WHICH KEY IS OPERATED, SAID MEANS COMPRISING A SINGLE OPERATIVE UNIT INCLUDING A FORWARDLY AND BACKWARDLY MOVABLE MEMBER, A TOOTHED SEGMENT OPERATED BY SAID MEMBER, A MOTOR FOR OPERATING SAID UNIT, A TOOTHED DRIVE WHEEL CAPABLE OF MESHING WITH A TRANSFER WHEEL IN THE OPERATIVE POSITION, A ONE-WAY RATCHET DRIVE FROM THE SEGMENT TO THE DRIVE WHEEL OPERABLE TO TURN SAID WHEEL ONLY ON REVERSE MOVEMENT OF THE SEGMENT AND MOVABLE MEMBER, AND MEANS OPERABLE BY SAID UNIT ON FORWARD MOVEMENTS OF THE MOVABLE MEMBER TO SHIFT THE TRANSFER WHEELS SUCCESSIVELY TO THE OPERATIVE POSITION.