Push-down memory

Claim 1

A PUSH-DOWN MEMORY SYSTEM FOR BINARY INFORMATION WHICH PROVIDES AN ORDERED READ OUT OF WORDS IN SEQUENCE PROCEEDING FROM ONE EXTREME VALUE TO THE OTHER COMPRISING: (A) A PLURALITY OF WORD STORAGE REGISTERS EACH FORMING AN INDIVIDUAL WORD POSITION STORAGE ROW IN THE MEMORY, (B) MEANS FOR ENTERING EACH WORD TO BE STORED INTO THE UPPER END STORAGE REGISTER OF SAID MEMORY, (C) MEANS INTERCONNECTING SAID WORD STORAGE REGISTERS AND OPERABLE DURING THE ENTRY OF AS NEW WORD TO SHIFT ALL WORDS STORED IN STORAGE REGISTERS ABOVE THE UPPERMOST EMPTY WORD STORAGE REGISTER SO THAT EACH SUCH SHIFTED WORD WILL OCCUPY THE NEXT LOWER STORAGE REGISTER TO MAKE ROOM FOR SAID NEW WORD IN SAID END STORAGE REGISTER, (D) A CONDITION DETECTION MEANS FOR EACH DIGIT IN EACH REGISTER, (E) EACH OF SAID CONDITION DETECTION MEANS BEING ACTIVE IN THE PRESENCE OF AN INPUT SIGNAL FOR INDICATING FIRST AND SECOND CONDITIONS OF THE ASSOCIATED DIGIT, (F) ONE OF SAID CONDITION BEING THE "ZERO" CONDITION AND THE OTHER BEING THE "ONE" CONDITION, (G) MEANS FOR PROVIDING AN INPUT SIGNAL TO EACH OF SAID CONDITION DETECTION MEANS FOR THE HIGHEST ORDER COLUMN FOR ALL WORD STORAGE REGISTERS FROM WHICH WORDS ARE TO BE READ OUT, (H) EACH OF SAID CONDITION DETECTION MEANS BEING OPERABLE WHEN ACTIVE TO PROVIDE AN OUTPUT SIGNAL IN RESPONSE TO SAID FIRST CONDITION AND TO PROVIDE AN ALTERNATIVE OUTPUT SIGNAL IN THE PRESENCE OF THE SECOND CONDITION AT ALL OF THE ACTIVE CONDITION DETECTION MEANS FOR THE ASSOCIATED COLUMN, (J) EACH CONDITION DETECTION MEANS BEING CONNECTED TO PROVIDE EITHER OF THE OUTPUT SIGNALS THEREFROM AS AN INPUT SIGNAL TO ANY LOWER ORDER CONDITION DETECTION MEANS FOR THE SAME STORAGE REGISTER, (K) AND AN OUTPUT SIGNAL FROM ANY CONDITION DETECTION MEANS OF THE LOWEST ORDER CONSTITUTING A WORD SELECTION CONTROL SIGNAL INDICATING AN EXTREME VALUE WORD SELECTED TO BE READ OUT, (L) A READ OUT MEANS OPERABLE TO READ OUT THE WORD FROM A SINGLE SELECTED REGISTER, (M) AND MEANS THEREAFTER OPERABLE TO MAKE THE CONDITION DETECTION MEANS FOR THAT WORD STORAGE REGISTER INACTIVE BY SUPPRESSING THE INPUT SIGNAL THERETO.