Nondestructive readout memory

Claim 1

A MAGNETIC-STORAGE DEVICE COMPRISING A BASE OF MAGNETIC MATERIAL, A RECTANGULAR GRID OF GROOVES ON THE SURFACE OF SAID BASE, SAID GROOVES SEPARATING LANDS OF MATERIALS, A PLURALITY OF SENSING WIRES, A DIFFERENT ONE OF WHICH IS IN AND EXTENDS ALONG A DIFFERENT ONE OF THE GROOVES IN SAID RECTANGULAR GRID WHICH ARE PARALLEL TO ONE ANOTHER, A PLURALITY OF DRIVING WIRES A DIFFERENT ONE OF WHICH IS IN AND EXTENDS ALONG A DIFFERENT ONE OF THE GROOVES IN SAID RECTANGULAR GRID WHICH ARE AT RIGHT ANGLES TO THE GROOVES WHEREIN SAID SENSING WIRES ARE DISPOSED, SAID SENSING AND DRIVING WIRES CROSSING EACH OTHER SUBSTANTIALLY AT RIGHT ANGLES AND BEING INSULATED FROM ONE ANOTHER, A NONMAGNETIC NONCONDUCTIVE SHEET ADJACENT TO SAID BASE OF MAGNETIC MATERIAL AND EXTENDING OVER THE SURFACE THEREOF, SAID NONMAGNETIC NONCONDUCTIVE SHEET HAVING A PLURALITY OF OPENINGS THERETHROUGH WHICH ARE DISPOSED TO AFFORD ACCESS TO EACH OF THE INTERSECTIONS OF THE GROOVES IN SAID RECTANGULAR GRID, A PLURALITY OF PLUG MEMBERS A DIFFERENT ONE OF WHICH IS ROTATABLY INSERTED INTO A DIFFERENT ONE OF SAID PLURALITY OF OPENINGS, EACH OF SAID PLUG MEMBERS CARRYING A BRIDGING MEMBER MADE OF MAGNETIC MATERIAL, SAID BRIDGING MEMBER BEING POSITIONED AT THE END OF THE PLUG MEMBER FOR CONTACTING DIAGONALLY OPPOSED LANDS AT AN INTERSECTION OF THE GROOVES, SAID PLUG BEING ROTATABLE FOR AFFORDING A SELECTION OF THE DIAGONAL POSITION OF THE BRIDGING MEMBER.