On 07/12/2013 16:11, Recliner wrote:
Graeme Wall wrote:
On 07/12/2013 15:35, Recliner wrote:
Graeme Wall wrote:
On 07/12/2013 15:09, Recliner wrote:
On Sat, 07 Dec 2013 12:20:30 +0000, Graeme Wall
wrote:

On 07/12/2013 11:26, d wrote:
On Sat, 07 Dec 2013 10:59:09 +0000
Graeme Wall wrote:
On 07/12/2013 10:46, d wrote:
so why do they need a timetable? Even on more complicated
lines you could have some sort of train recognition system whereby the driver
types in his route at the start of his trip and the signalling sets the
route according to the trains id when it gets to certain junctions. No need
for a timetable.


Reinventing the wheel. I suggest you read up on TfL's regulatory system.

AFAIK its done by a timetable system - not by simply picking up a train id
at the trackside and setting the route accordingly.



Back in the 1960s the Northern Line was using automatic route setting
equipment. Used a giant pianola type roll with punched holes.

The first LU Programme Machines went into service in 1955

cough 1958 at Kennington, though it wasn't patented till 1960.

I was going by this official timeline:
http://www.tfl.gov.uk/assets/downloa...-transport.pdf
"1955 First system of programme machine signalling introduced at Camden
Town"


Well TfL ought to know :-) I think that only worked at Camden Town
According to "How the Underground Works" full programme machine operating
on the Northern Line was introduced progressively from 1958 till about
1968. District line installation commenced in 1960.

What I found harder to ascertain is how many of the original mechanical
programme machines are still in use (and for how much longer)?


Just says "some" are still in use!

--
Graeme Wall
This account not read, substitute trains for rail.
Railway Miscellany at http://www.greywall.demon.co.uk/rail