|
GB360725A
|
|
Improvements in indicating devices for electro-magnetic talking machines
|
|
GB350852A
|
|
Improvements in magnetic sound records
|
|
US1846110A
|
|
Magnetic sound record carrier
|
|
DE571543C
|
|
Drum for winding the speaking wire on steel wire speaking machines
|
|
DE569983C
|
|
Device for making the drive parts sitting on the work plate of sound recording machines accessible
|
|
DE587671C
|
|
Device for shutting down the speaking wire or cord of magnetic speaking machines
|
|
DE547469C
|
|
Device for displaying the position of the speaking wire or tape in steel wire speaking machines with exchangeable coil set
|
|
DE557997C
|
|
Circuit arrangement for speech current transmitters in steel wire speech machines
|
|
DE585454C
|
|
Speech head for recording or scanning speech exchange currents
|
|
US1846531A
|
|
Electromagnetic recording arrangement for acoustic vibrations
|
|
DE580026C
|
|
Speaking machine, in particular roller speaking machine with electric motor drive
|
|
DE555630C
|
|
Rewinding device for wires or tapes, especially for speech wires of electromagnetic speech machines
|
|
DE564538C
|
|
Playback magnet system for magnetic sound recordings on steel wire
|
|
DE472013C
|
|
Electric sound box, microphone sound box for speaking machines or the like with several induction coils
|
|
DE572877C
|
|
Carrier for electromagnetic sound recordings
|
|
CA321295A
|
|
Electro-magnetic sound recording device
|
|
DE571923C
|
|
Method and device for marking moving steel wires or steel strips
|
|
DE584276C
|
|
Device on speaking machines with magnetizable wire or tape-shaped sound carrier
|
|
DE555631C
|
|
Talk head for magnetograms
|
|
CA325030A
|
|
Magnetic sound record carrier
|
