19 Mar
2008
19 Mar
'08
12:40 a.m.
Tom Peters wrote:
Brent Hilpert wrote:
I do believe I addressed that in the message which you were replying to:
Does anybody know what the signalling technique
(protocol) for these devices
was? I've always been curious about this but never had a mechanism to peruse.
Weren't they driven via a current loop with 5-level baudot? Brent Hilpert wrote:
>My recollection from readings is that async bit-serial devices (tty, baudot
>codes & c.) ("automated telegraphy") were not really successful until
into
>the 20th century, while these stock ticker networks were functioning decades
>before that.
Also:
>Looking at the photo gallery on the site and the
apparent simplicity of the
>mechanism ...