[GreenKeys] Rock and Roll Teletype 'experts'
vp at cs.drexel.edu
Tue Jun 14 20:29:33 CDT 2005
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
> A bit later, but I have a set of 6 books entitled 'Modern Electrical
> Engineering' which I estimate date from between 1910 and 1920. These
> contain a description of the Baudot telegraph system with diagrams of the
> machinerey, circuits for the 'Quadruplex', etc. It appears to have been
> well in use by then.
> Said books also contain a description of a lovely electromechanical FIFO
> system used to store train descriptors on the London Underground (and its
> associated binary to 1-of-n decoder) ...
which I suppose are still in use in the New York subway :-)
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