SN.20: Difference between revisions

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Back to [[Control Functions]].
Back to [[Control Functions]].


[[File:SN20.jpg|thumb|300px|right|SN20 (left) and SN620 (right) Signals ''(Photo by Danny Scroggins)'']]
[[File:SN20.jpg|thumb|400px|right|SN20 (left) and SN620 (right) Signals ''(Photo by Danny Scroggins)'']]
 
==Origin==


This signal previously [[DM.72]], but was converted into a controlled signal when [[Bourton]] Interlocking was commissioned on 1/10/77, as described in the following WON entry:
This signal previously [[DM.72]], but was converted into a controlled signal when [[Bourton]] Interlocking was commissioned on 1/10/77, as described in the following WON entry:


[[File:WON_Bourton_1977.png]]
[[File:1977-08.png]]
 
The signal was formerly an automatic - [[DM.72]]
 
==Conversion to four-aspect==


The signal was converted from a three-aspect head to a four-aspect head, and positioned on a new gantry at 04.50 on Monday 14 January 2002. The top yellow was not yet brought into use.
The signal was converted from a three-aspect head to a four-aspect head, and positioned on a new gantry at 04.50 on Monday 14 January 2002. The top yellow was not yet brought into use.


[[File:WON-2002-01.png | border]]
[[File:WON-2002-01.png | border]]
The top yellow aspect was planned to be brought into use on 7 February 2000, as described in [[GWS.15]], but, due to 'construction difficulties' the work did not take place.
[[File:WON-2000-03.png | border]]
The top yellow was then planned to be brought into use on 11 February 2002, as described in [[GWS.27]].
[[File:WON-2002-06.png | border]]
and
[[File:WON-2002-03.png | border]]
but wasn't until 18 February 2002....
[[File:WON-2002-04.png | border]]

Latest revision as of 13:15, 15 November 2014

Back to Control Functions.

SN20 (left) and SN620 (right) Signals (Photo by Danny Scroggins)

Origin

This signal previously DM.72, but was converted into a controlled signal when Bourton Interlocking was commissioned on 1/10/77, as described in the following WON entry:

1977-08.png

The signal was formerly an automatic - DM.72

Conversion to four-aspect

The signal was converted from a three-aspect head to a four-aspect head, and positioned on a new gantry at 04.50 on Monday 14 January 2002. The top yellow was not yet brought into use.

WON-2002-01.png

The top yellow aspect was planned to be brought into use on 7 February 2000, as described in GWS.15, but, due to 'construction difficulties' the work did not take place.

WON-2000-03.png

The top yellow was then planned to be brought into use on 11 February 2002, as described in GWS.27.

WON-2002-06.png

and

WON-2002-03.png

but wasn't until 18 February 2002....

WON-2002-04.png