14 Jun
2005
14 Jun
'05
4:30 p.m.
Really? I would have thought most people here knew
that Baudot's
teletype dates back to 1870, and was operational in 1877.
His keyboard had only five keys, but it was ITU 1.
Or do think it is little known because Britain were late adopters and
the US was on a different trail?
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) ...
-tony