Magnetic card random access memory

Claim 1

A CARD MEMORY SYSTEM COMPRISING A PLURALITY OF CARDS, EACH CARD HAVING A PLURALITY OF PARALLEL MAGNETIC STRIPS FOR RECORDING BINARY INFORMATION BITS AND HAVING A PLURALITY OF SLOTS ALONG THE TOP EDGE, SELECTED ONES OF THE SLOTS ON EACH CARD HAVING UNDERCUT PORTIONS AT THE BOTTOM OF THE SLOT ACCORDING TO A PREDETERMINED CODED PATTERN, EACH CARD BEING INIQUELY IDENTIFIED BY THE PATTERN OF UNDERCUT PORTIONS AT THE BOTTOM OF THE PLURALITY OF SLOTS IN THE CARD, RETRACTABLE MEANS FOR SUPPORTING THE CARDS IN A HORIZONTALLY STACKED POSITION WITH THE SLOTS ALIGNED, A PLURALITY OF BAILS EXTENDING HORIZONTALLY THROUGH THE ALIGNED SLOTS, MEANS RESPONSIVE TO AN ADDRESS SIGNAL FOR SELECTIVELY MOVING THE BAILS LATERALLY TOWARDS THE EDGES OF THE SLOTS INTO ENGAGEMENT WITH THE UNDERCUT PORTIONS, MEANS FOR RETRACTING SAID CARD SUPPORTING MEANS SO THAT THE CARDS ARE PERMITTED TO DROP, THE BAILS PREVENTING ALL BUT ONE OF THE CARDS FROM DROPPING ACCORDING TO THE PATTERN OF UNDERCUT PORTIONS OF THE SLOTS BY ENGAGING AT LEAST ONE OF THE UNDERCUT PORTIONS OF EACH OF THE OTHER CARDS, A TRANSDUCER HEAD, MEANS RESPONSIVE TO AN ADDRESS SIGNAL FOR MOVING THE TRANSDUCER HEAD PARALLEL TO, BUT BELOW, THE STACK OF CARDS TO A SELECTED POSITION, THE HEAD BEING MOVED SIMULTANEOUSLY WITH THE SELECTION AND DROPPING OF A CARD, WHEREBY THE HEAD IS MOVED INTO POSITION TO SCAN ANY CARD SELECTED BY THE BAILS, MEANS FOR SCANNING THE HEAD TRANSVERSELY BENEATH THE STACK OF CARDS ACROSS THE FACE OF THE SELECTED CARD DROPPED OUT OF THE STACK, MEANS FOR OPERATING THE TRANSDUCER HEAD TO READ OFF AND WRITE ON NEW INFORMATION DURING THE OPERATION OF THE SCANNING MEANS, AND MEANS RESPONSIVE TO AN ADDRESS SIGNAL FOR CONTROLLING THE VERTICAL POSITION OF THE DROPPED CARD RELATIVE TO THE TRANSDUCER HEAD FOR POSITIONING A SELECTED ONE OF SAID PLURALITY OF MAGNETIC STRIPS IN POSITION OPPOSITE THE TRANSDUCER HEAD.