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Re: [ARSCLIST] Strips of plastic play audio when you run your teeth over them
From: Patent Tactics, George Brock-Nannestad
Jon Noring wrote:
...................
>
> Related question:
>
> Did anyone in the distant past work on a "tape" or "wire" system based
> on groove or shape for mechanical playback (not magnetic)?
----- yes, the German Tefifon was a cartridge with an endless strip of
plastic (I think acetate again) with lateral grooves embossed from a master
nickel strip, played back with a sapphire stylus totally integrated in the
replay system. It was somewhat bulky ca. 1939, but the postwar development
was for a smaller cartridge. I think they featured compilations and complete
operattas, and certainly had a long duration. It was a reproduction format
only.
Kind regards,
George