[GreenKeys] Teletype tape to Morse tape converter

[COURYHOUSE at aol.com]

Jim  -  did the  bi polar transmissions   handle  the  factor of the cable 
length  better?  explain/...
 
 
In a message dated 1/31/2016 1:52:04 P.M. US Mountain Standard Time,  
jhhaynes at earthlink.net writes:

On Sun,  31 Jan 2016, Ed Sharpe Archivist for SMECC via GreenKeys wrote:

>  There were a lot of them used  ww2  I was  told but how far  back do 
they go?
>  
Patented in 1914, pats 1,085,984 and  1,085,985

I believe the original use was for undersea cable  transmission, where they
used bipolar signals, one polarity for dot and the  other for dash.  Then
with radio used for very high speed operation  with dots and dashes.
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