Calculator apparatus

Claim 1

A CALCULATOR APPARATUS COMPRISING: A MEMORY HAVING A PLURALITY OF NUMBER STORAGE REGISTERS, EACH NUMBER STORAGE REGISTER INCLUDING A PLURALITY OF DIGIT STORAGE LOCATIONS, EACH DIGIT STORAGE LOCATION INCLUDING A PLURALITY OF BIT STORAGE POSITIONS; SOURCE MEANS PERIODICALLY PROVIDING A CLOCK PULSE; READOUT MEANS FOR READING FROM EACH OF SAID NUMBER STORAGE REGISTERS; WRITE IN MEANS FOR WRITING INTO EACH OF SAID NUMBER STORAGE REGISTERS; A KEYBOARD INCLUDING A PLURALITY OF REGISTER KEYS, A PLURALITY OF NUMERIC KEYS, AND A PLURALITY OF FUNCTION KEYS; A COUNTER; MEANS RESPONSIVE TO THE ACTUATION OF EACH OF SAID NUMERIC KEYS FOR ENTERING A DIFFERENT DIGIT INTO SAID COUNTER; MEANS FOR CONNECTING SAID SOURCE MEANS TO SAID COUNTER FOR DECREMENTING SAID COUNTER IN RESPONSE TO EACH OF SAID PROVIDED CLOCK PULSES; A GATE; MEANS FOR CONNECTING SAID SOURCE MEANS AND SAID COUNTER TO SAID GATE FOR CAUSING SAID GATE TO DEVELOP OUTPUT PULSES IN SYNCHRONISM WITH EACH OF SAID CLOCK PULSES FOR SO LONG AS SAID COUNTER IS IN A NON-ZERO STATE; MEANS FOR IDENTIFYING ONE OF SAID DIGIT STORAGE LOCATIONS; MEANS RESPONSIVE TO THE ACTUATION OF EACH OF SAID REGISTER KEYS FOR COUPLING SAID GATE TO SAID WRITE IN MEANS FOR RECORDING SAID OUTPUT PULSES IN SAID IDENTIFIED DIGIT STORAGE LOCATION WITH EACH OF SAID OUTPUT PULSES BEING RECORDED IN A DIFFERENT ONE OF SAID BIT STORAGE POSITIONS; AND MEANS RESPONSIVE TO THE SELECTIVE ACTUATION OF EACH OF SAID FUNCTION KEYS FOR PERFORMING SELECTED OPERATIONS WITH RESPECT TO THE NUMBERS STORED IN SAID REGISTERS.