197598 ⎘
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 for repeating a part of the record; for beginning or stopping at a desired point of the record using automatic means using mechanical means for detecting the end of the recording