197591 ⎘
Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor; Arrangements of heads; Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means; Driving the head the head being driven by means independent of the record carrier driving means for fixed arms carrying a movable head