14 Jun
2005
14 Jun
'05
6:29 p.m.
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 :-)
**vp