Electromagnetic transducer apparatus

Claim 1

RANDOM ACCESS MEMORY APPARATUS COMPRISING, (A) ONE OR MORE ELECTROMAGNETIC TRANSDUCERS, (B) A FRAME ASSEMBLY INCLUDING LOADING MEANS SUPPORTING SAID TRANSDUCERS FOR MOVEMENT ABOUT AT LEAST TWO SUBSTANTIALLY PERPENDICULAR AXES ADJACENT THE SURFACE OF A RECORD MEMBER WITH WHICH SAID TRANSDUCERS MAY BE OPERABLY ASSOCIATED. (C) TENSION MEANS URGING SAID TRANSDUCERS LATERALLY IN ONE DIRECTION OVER SAID RECORD MEMBER. (D) A FLEXIBLE MEMBER SECURED AT ONE END TO SAID TRANSDUCER FRAME ASSEMBLY AND HAVING ITS OPPOSITE END SECURED TO A FIXED SUPPORT. (E) A PLURALITY OF ELECTROMAGNETS EACH OF WHICH INCLUDES A MOVABLE PLUNGER MECHANISM. (F) A PULLEY MOUNT CARRYING A ROTATABLE PULLEY WHEEL ROCKABLY DISPOSED ADJACENT EACH ELECTROMAGNET, (G) SAID FLEXIBLE MEMBER BEING WOUND IN A ZIG-ZAG PATH BACK AND FORTH AROUND PORTIONS OF EACH PULLEY WHEEL, (H) DAMPING MEANS INTERMEDIATE THE ENDS OF SAID FLEXIBLE MEMBER FOR LIMITING ANY OVER-TRAVEL OF SAID TRANSDUCER AND, (I) MEANS OPERABLY INTERCONNECTING EACH SAID PULLEY MOUNT WITH THE PLUNGER OF A RESPECTIVE ONE OF SAID ELECTROMAGNETS EFFECTIVE WHEN SAID ELECTROMAGNET IS ENERGIZED TO ROCK SAID PULLEY WHEEL SO AS TO VARY THE EFFECTIVE LENGTH OF SAID FLEXIBLE MEMBER IN A MANNER MOVING SAID TRANSDUCERS LATERALLY AGAINST THE TENSION OF SAID URGING MEANS THEREBY SELECTIVELY POSITIONING SAID TRANSDUCERS RELATIVE TO SAID RECORD MEMBER.