Electronic calculators

Claim 1

IN AN ELECTRONIC CALCULATOR ARRANGEMENT COMPRISING A CALCULATING UNIT, A PLURALITY OF DATA STORES AND SWITCH MEANS FOR SELECTIVELY CONNECTING ANY ONE OF THE DATA STORES TO THE CALCULATING UNIT, THE IMPROVEMENT WHICH COMPRISES SELECTOR SWITCH CONTROL MEANS FOR CONTROLLING THE CONNECTION OF ANY ONE OF THE DATA STORES TO THE CALCULATING UNIT, SAID SELECTOR SWITCH CONTROL MEANS COMPRISING A RING COUNTER HAVING ONE STAGE FOR EACH DATA STORE, AND A CONTROL CIRCUIT FOR EACH DATA STORE ASSOCIATED WITH EACH STAGE OF THE COUNTER, EACH CONTROL CIRCUIT COMPRISING FOUR COLD CATHODE GAS DISCHARGE TUBES, THE FIRST OF SAID TUBES BEING NORMALLY EXTINGUISHED AND BEING CONNECTED TO CONTROL THE CONDUCTANCE OF THE SECOND OF SAID TUBES WHICH IS NORMALLY CONDUCTING, THE THIRD OF SAID TUBES BEING NORMALLY EXTINGUISHED AND BEING CONNECTED TO CONTROL THE CONDUCTANCE OF THE FOURTH OF SAID TUBES WHICH IS NORMALLY CONDUCTING, CONNECTIONS BETWEEN SAID FIRST AND THIRD TUBES AND THE ASSOCIATED STAGE OF THE RING COUNTER, MEANS FOR FEEDING A STRIKING POTENTIAL TO THE FIRST TUBE FROM THE ASSOCIATED DATA STORE WHEN IT IS DESIRED TO CONNECT THAT STORE TO THE CALCULATING UNIT, MEANS FOR APPLYING A CHANGE IN POTENTIAL CAUSED BY THE STRIKING OF SAID FIRST TUBE TO STOP THE CYCLING OF THE RING COUNTER AND TO EXTINGUISH SAID SECOND TUBE, MEANS FOR FEEDING A POTENTIAL FROM THE RING COUNTER TO STRIKE SAID THIRD TUBE WHICH IN TURN EXTINGUISHES SAID FOURTH TUBE AND CONNECTS THE ASSOCIATED DATA STORE TO THE CALCULATING UNIT WHEREBY DATA IN THE STORE MAY BE FED TO THE CALCULATING UNIT, MEANS FOR FEEDING A SIGNAL FROM THE CALCULATING UNIT AT THE END OF A CALCULATION TO CAUSE THE SECOND AND FOURTH TUBES TO STRIKE, WHICH IN TURN RESPECTIVELY EXTINGUISH THE FIRST AND THIRD TUBES SO THAT SAID CONTROL CIRCUIT REVERTS TO ITS INITIAL CONDITION, AND THE EXTINGUISHING OF SAID FIRST TUBE APPLYING A POTENTIAL TO THE RING COUNTER TO ALLOW IT TO CONTINUE ITS CYCLIC OPERATION.