Electronic memory attachment for accounting machines or the like

Claim 1

A DATA INPUT-OUTPUT CIRCUIT FOR RECEIVING AND STORING DECIMAL INPUT SIGNALS AND BINARY INPUT SIGNALS AND FOR DEVELOPING DECIMAL OUTPUT SIGNALS AND BINARY OUTPUT SIGNALS, SAID DATA INPUT/OUTPUT CIRCUIT COMPRISING A PLURALITY OF DECADE COUNTER/SHIFT REGISTER STAGES EACH HAVING A COUNT INPUT TERMINAL, A COUNT OVERFLOW OUTPUT TERMINAL, A SHIFT PULSE INPUT TERMINAL, A SHIFT INFORMATION INPUT TERMINAL, AND A SHIFT INFORMATION OUTPUT TERMINAL, SAID DECADE COUNTER/SHIFT REGISTER STAGES BEING COUPLED TOGETHER IN CASCADE WITH THE SHIFT INFORMATION OUTPUT OF EACH STAGE COUPLED TO THE SHIFT INFORMATION OUTPUT OF THE PRECEDING STAGE AND THE SHIFT INFORMATION OUTPUT OF EACH STAGE COUPLED TO THE SHIFT INFORMATION INPUT OF THE SUCCEEDING STAGE, A SHIFT PULSE SOURCE COUPLED TO THE SHIFT PULSE INPUT OF EACH OF SAID STAGES, MEANS FOR APPLYING BINARY INPUT SIGNALS TO THE SHIFT INFORMATION INPUT TERMINALS OF THE FIRST STAGE OF SAID CASCADED REGISTER CIRCUITS TO ENTER BINARY SIGNALS THEREINTO, A PLURALITY OF INPUT GATING CIRCUITS EACH COUPLED TOTHE COUNT INPUT OF A CORRESPONDING DECADE COUNTER STAGE, MEANS COUPLED TO EACH OF SAID INPUT GATING CIRCUITS FOR DEVELOPING A TRAIN OF PULSES CORRESPONDING IN NUMBER TO A PREDETERMINED DECIMAL DIGIT TO ENTERR DECIMAL SIGNAL INTO SAID REGISTER, A PLURALITY OF OUTPUT GATING CIRCUITS EACH COUPLED TO THE COUNT OVERFLOW OUTPUT OF A CORRESPONDING DECADE COUNTER STAGE, EACH OF SAID OUTPUT GATING CIRCUITS BEING ADAPTED TO PRODUCE AN OUTPUT SIGNAL IN RESPONSE TO AN OVERFLOW OUTPUT SIGNAL FROM THE CORRESPONDING DECADE, AND MEANS FOR APPLYING A TRAIN OF ROLL-OUT PULSES TO EACH OF SAID INPUT GATING CIRCUIT TO DEVELOP DECIMAL OUTPUT SIGNAL IN SAID OUTPUT GATING CIRCUITS.