Automatic lock for head-carriage assembly in a disk file
Automatic music selecting device for tape recorder
Automatic reverse cassette type recorder
Automatic reverse tape recorder with head turn-over
Automatic scan tracking mechanism
Axial resonance attenuating apparatus for rotation drum apparatu
Azimuth adjusting device for magnetic head
Azimuth angle adjusting device for a tape player
Azimuth angle adjustment for a magnetic head
Azimuth regulating mechanism in floppy disc drive
Azimuthally adjustable means for attaching magnetic heads