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Claim 1

IN A TEN-KEY KEYBOARD CALCULATING MACHINE HAVING A REGISTER COMPRISING A PLURALITY OF DEMONINATIONAL ORDERS OF NUMERAL WHEELS AND A KEYBOARD OF TEN SELECTIVELY DEPRESSIBLE KEYS, EACH IDENTIFIABLE FROM THE OTHER BY AN INDICIUM THEREON OF ONE OF A SEQUENCE OF TEN DIGITS OF FROM ZERO TO NINE, BOTH INCLUSIVE, IN COMBINATION, A ROTARY SHAFT MEANS, A PRINCIPAL ACTUATOR MOUNTED ON THE SHAFT FOR MOVEMENT THEREON AND TO ROTATE THEREWITH, DETACHABLE COUPLING MEANS TO COUPLE SAID PRINCIPAL ACTUATOR SELECTIVELY TO SAID NUMERAL WHEELS FOR ACTUATION THEREOF; A TRANSPORTER MEANS FOR TRANSPORTING SAID PRINCIPAL ACTUATOR FROM THE ONE POSITION THEREOF IN ENGAGEMENT WITH ONE OF SAID NUMERAL WHEELS AXIALLY TO ANOTHER POSITION IN ENGAGEMENT WITH A SUCCEEDING NUMERAL WHEEL OF NEXT LOWER DENOMINATIONAL ORDER IN SUCCESSION IN DESCENDING DENOMINATIONAL ORDER; SPRING MEANS RESPONSIVE TO MOTION OF THE PRINCIPAL ACTUATOR IN THE DESCENDING DIRECTION TO STORE ENERGY; RELEASE MEANS TO BE ENGAGED BY THE PRINCIPAL ACTUATOR AFTER ACTUATION OF THE LAST NUMERAL WHEEL TO RELEASE SAID SPRING MEANS FOR TRANSPORTING SAID PRINCIPAL ACTUATOR FROM THE POSITION IN ENGAGEMENT WITH THE NUMERAL WHEEL OF THE LOWEST DENOMINATIONAL ORDER BACK TO ITS STARTING POSITION; A MEMBER ACTUATABLE BY SAID KEYS AND MOVABLE BY THE RESPECTIVE KEYS IN DIFFERING AMOUNTS; AND MOTION MODIFYING MEANS TO CONVERT MOVEMENT OF THE MEMBER IN THE ONE DIRECTION INTO A ROTARY MOTION OF SAID ROTARY SHAFT MEANS.