Positioner for magnetic heads coacting with multitrack magnetic records

Claim 1

POSITIONING APPARATUS FOR POSITIONING AT LEAST ONE MAGNETIC TRANSDUCER ADJACENT ONE TRACK OF A PLULARITY OF TRACKS ON A MAGNETIC RECORD CARRIER, COMPRISING: A PLURALITY OF DRIVER MEANS, EACH DRIVER BEING ADAPTED TO BE DRIVEN INTO ONE OF TWO POSITIONS IN RESPONSE TO AN INPUT SIGNAL, A PLURALITY OF DIFFERENTIAL LEVERS CORRESPONDING IN NUMBER TO SAID PLURALITY OF DRIVER MEANS, A PLURALITY OF COUPLING MEANS EACH COUPLING ONE DRIVER TO ITS CORRESPONDING DIFFERENTIAL LEVER, SAID COUPLING MEANS IMPARTING A SUBSTANTIALLY SINUSOIDAL MOVEMENT TO EACH LEVER IN RESPONSE TO A CHANGE IN POSITION OF THE CORRESPONDING DRIVER, EACH LEVER HAVING TWO ENDS WHICH ARE FIXED DISTANCE APART AND ARE AT DIFFERENT DISTANCES RESPECTIVELY FROM AN INTERMEDIATE POINT ACTUATED BY SAID COUPLING MEANS, A PLURALITY OF LINK MEANS LINKING TOGETHER PREDETERMINED ENDS OF SAID LEVERS, AND AT LEAST ONE MAGNETIC HEAD COUPLED TO SAID LINK MEANS, SAID HEAD HAVING A SUBSTANTIALLY SINUSOIDAL MOVEMENT IN RESPONSE TO THE SUBSTANTIALLY SINUSOIDAL LEVER MOVEMENTS AND ASSUMING A PARTICULAR POSITION DETERMINED BY THE PARTICULAR POSITIONS OF SAID PLURALITY OF DRIVER MEANS IN RESPONSE TO AN INPUT SIGNAL.