Electromechanical memory device

Claim 1

AN ELECTROMECHANICAL MEMORY DIVICE COMPRISING IN COMBINATION A CYLINDRICAL DRUM ROTATABLE ABOUT AN AXIS AND HAVING A RESILIENT MATERIAL LINING, CIRCUMFERENTIALLY EXTENDING GROOVES WITHIN SAID LINING, BALLS COOPERATING WITH SAID GROOVES AND REPRESENTATIVE OF BINARY DIGITS OF DATA TO BE RECORDED, MEANS FOR SELECTIVELY FORCING SAID BALLS INTO SAID GROOVES AT POSITIONS OF THE SAME ALIGNED UPON SAID DRUM IN ACCORDANCE WITH DATA ITEMS TO BE RECORDED, AN ARM PIVOTALLY MOUNTED ABOUT THE DRUM AXIS, BALL DETECTOR MEANS CARRIED BY SAID PIVOTED ARM, A FIRST DRIVE MEANS FOR ROTATING SAID DRUM IN A FORWARD DIRECTION, A SECOND DRIVE MEANS ROTATING IN A BACKWARD DIRECTION, MEANS FOR CONTROLLING THE BALL DETECTOR MEANS AND READINGOUT SAID DATA ITEMS, MEANS CONTROLLED BY BOTH SAID FORCING MEANS AND SAID CONTROLLING AND READING-OUT MEANS FOR SELECTIVELY ENGAGING SAID PIVOTED ARM TO SAID FIRST AND SECOND DRIVE MEANS, WHEREBY SAID DRUM AND PIVOTED ARM ROTATE AS A SINGLE UNIT IN THE FORWARD DIRECTION EACH TIME DATA ITEMS ARE RECORDED WHILE SAID PIVOTED ARM ROTATES ALONE IN THE BACKWARD DIRECTION AND SAID DRUM REMAINS STATIONARY EACH TIME DATA ITEMS ARE READ-OUT.