Two-register calculator for performing multiplication and division using identical operational steps

Claim 1

APPARATUS FOR PERFORMING THE OPERATIONS OF DIVISION AND MULTIPLICATION COMPRISING: A FIRST REGISTER FOR THE DIVIDEND AND QUOTIENT OR MULTIPLIER AND PRODUCT RESPECTIVELY, A SECOND REGISTER FOR THE DIVISOR OR MULTIPLICAND, AN ADDER-SUBTRACTER CIRCUIT HAVING A FIRST (AUGEND-MINUEND) INPUT, A SECOND (ADDEND-SUBTRAHEND) INPUT AND A SUMDIFFERENCE OUTPUT, THE OUTPUT OF SAID FIRST REGISTER BEING CONNECTED TO SAID ADDER-SUBTRACTER FIRST INPUT, THE INPUT TO SAID FIRST REGISTER BEING CONNECTED TO SAID ADDER-SUBTRACTER OUTPUT, THE OUTPUT OF SAID SCOND REGISTER BEING CONNECTED TO SAID ADDER-SUBTRACTER SECOND INPUT, MEANS FOR PRODUCING A SIGNAL WHEN THE OUTPUT FROM SAID ADDER-SUBTRACTER GOES THROUGH ZERO, MEANS FOR CONTROLLING SAID ADDER-SUBTRACTER TO EITHER ADD OR SUBTRACT IN RESPONSE TO SAID THROUGH-ZERO SIGNALS TO CAUSE SAID ADDER-SUBTRACTER TO DO THE ALTERNATE OPERATION, MEANS FOR MULTIPLYING THE CONTENTS OF SAID FIRST REGISTER BY THE RADIX OF THE NUMBER SYSTEM IN USE IN RESPONSE TO THE SAID THROUGH-ZERO SIGNALS AND COUNTING MEANS FOR COUNTING CERTAIN OF SAID THROUGHZERO SIGNALS AND FOR TERMINATING THE OPERATION WHEN SAID COUNTER REACHES A PREDETERMINED COUNT, WHEREBY THE NATURE OF THE OPERATION PERFORMED, BE IT MULTIPLICATION OR DIVISION, DEPENDS ENTIRELY UPON THE ORIGINAL PLACEMENT OF THE NUMBERS IN THE FIRST AND SECOND REGISTERS.