Swindon MAS Stage 1: Difference between revisions

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==Swindon MAS Stage 1 - Uffington to Highworth Junction==
==Swindon MAS Stage 1 - Uffington to Highworth Junction==


The first stage of the Swindon MAS scheme was planned to be introduced over the period Saturday 12th November to Monday 14th November 1966 between [[Uffington]] and [[Highworth]] Junction.
===Overview===
 
The main purpose of Stage 1 of the Swindon MAS scheme was to remove the mechanical signal boxes between [[Uffington]] and [[Highworth]] Junction and instroduce MAS and TCB between the signal boxes, in readiness for future migration to the Panel.
 
===Detail===
 
This stage was planned to be introduced over the period Saturday 12th November to Monday 14th November 1966 between [[Uffington]] and [[Highworth]] Junction.


As part of this stage of the scheme, [[Knighton]], [[Ashbury]] Crossing and Marston Crossing West Signal Boxes were all taken out of use, with all the signalling removed and the level crossings at [[Knighton]] and [[Ashbury]] temporarily closed pending conversion to AHB. [[Knighton]] Signal Box was planned to be taken out of use between 0700 and 0800 on Saturday 12th November, preliminary to the main occupation.
As part of this stage of the scheme, [[Knighton]], [[Ashbury]] Crossing and Marston Crossing West Signal Boxes were all taken out of use, with all the signalling removed and the level crossings at [[Knighton]] and [[Ashbury]] temporarily closed pending conversion to AHB. [[Knighton]] Signal Box was planned to be taken out of use between 0700 and 0800 on Saturday 12th November, preliminary to the main occupation.
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[[Highworth]] Junction’s Down Main Distant and Up Main Outer Advanced Starting were similarly treated. [Numbers??]
[[Highworth]] Junction’s Down Main Distant and Up Main Outer Advanced Starting were similarly treated. [Numbers??]


A new ground frame was installed at [[Ashbury Up Siding Ground Frame|Ashbury]] to control the trailing connection from the siding there named "[[Ashbury Up Siding Ground Frame]]". The [[Ashbury Ground Frame|existing ground frame at Ashbury]], controlling the emergency crossovers remained. Both ground frames were locked by Annetts keys released from [[Uffington]], the protecting signals were UM71 on the up and DM70 on the down.
===Ground Frames===
 
A new ground frame was installed at [[Ashbury Up Siding Ground Frame|Ashbury]] to control the trailing connection from the siding there named "[[Ashbury Up Siding Ground Frame]]". The [[Ashbury Ground Frame|existing ground frame at Ashbury]], controlling the emergency crossovers remained. Both ground frames were locked by Annetts keys released from [[Uffington]], the protecting signals were [[UM.71]] on the up and [[DM.70]] on the down.
 
===Multiple Aspect Signals===
 
On the Up Main, the MAS signal sequence, and number of aspects, was:
 
{| class="wikitable"
|-
| [[UM.73R]] || (2A, Y/G) || rowspan="2" | with telephones to [[Highworth]] Junction SB.
|-
| [[UM.73]] || (3A)
|-
| [[UM.72]] || (4A) || rowspan="8" | with telephones to [[Uffington]] SB.
|-
| [[UM.71]] || (4A, semi-automatic, protecting Ashbury GF)
|-
| [[UM.70]] || (4A)
|-
| [[UM.69]] || (4A)
|-
| [[UM.68]] || (3A)
|-
| [[UF.22]] || (3A, entrance to [[Uffington]] up loop)
|-
| [[UF.16]] || (3A, exit from [[Uffington]] up loop)
|-
| [[UM.65]] || (3A)
|}
 
[[Uffington]] already controlled several more automatics on the Up Main east of the loops, since the [[Reading PSB|Reading]] MAS scheme.
 
On the Down Main, the MAS signal sequence, and number of aspects, from [[Uffington]] was:


On the Up Main, the MAS signal sequence, and number of aspects, was: UM73R (Y/G), UM73 (3A), with telephones to [[Highworth]] Junction SB. And UM72 (4A), UM71 (4A, semi-automatic, protecting Ashbury GF), UM70 (4A), UM69 (4A), UM68 (3A), UF22 (3A, entrance to [[Uffington]] up loop), UF16 (3A, exit from [[Uffington]] up loop), UM65 (3A) with telephones to [[Uffington]]). [[Uffington]] already controlled several more automatics on the Up Main east of the loops, since the [[Reading PSB|Reading]] MAS scheme.
{| class="wikitable"
|-
| [[DM.64]] || (3A) || rowspan = "7" | with telephones to [[Uffington]]
|-
| [[UF.32]] || (3A, entrance to [[Uffington]] down loop)
|-
| [[UF.4]] || (3A, exit from [[Uffington]] down loop)
|-
| [[DM.67]] || (4A)
|-
| [[DM.68]] || (4A)
|-
| [[DM.69]] || (3A)
|-
| [[DM.70]] || (3A, semi-automatic, protecting [[Ashbury Ground Frame|Ashbury GF]])
|-
| [[DM.72]] || (3A) || rowspan="3" | with telephones to [[Highworth]] Junction SB.
|-
| [[DM.73]] || (4A)
|-
| [[HW.1]] || (4A) 
|}


On the Down Main, the MAS signal sequence, and number of aspects, from [[Uffington]] was: DM64 (3A), UF32 (3A, entrance to [[Uffington]] down loop), UF4 (3A, exit from [[Uffington]] down loop), DM67 (4A), DM68 (4A), DM69 (3A), DM70 (3A, semi-automatic, protecting [[Ashbury Ground Frame|Ashbury GF]]), with telephones to [[Uffington]]. And DM72 (3A), DM73 (4A), HW1 (4A) with telephones to [[Highworth]] Junction SB. [[Uffington]] already supervised several more automatics on the Down Main east of the loops, since the [[Reading PSB|Reading]] MAS scheme.
[[Uffington]] already supervised several more automatics on the Down Main east of the loops, since the [[Reading PSB|Reading]] MAS scheme.


Telephones to [[Uffington]] were also provided at the handcrank release instruments at [[Uffington]] and the ground frames at [[Ashbury]].
Telephones to [[Uffington]] were also provided at the handcrank release instruments at [[Uffington]] and the ground frames at [[Ashbury]].


=====Related Documents=====
===Related Documents===
 
*[[S.2498|Signalling Notice S.2498]]
*[[S.2498|Signalling Notice S.2498]]


*[[Media:Stage_1_Works_Instructions.pdf|Stage 1 Works Instructions]] (7203)
*[[Media:Stage_1_Works_Instructions.pdf|Stage 1 Works Instructions]] (7203)
{{Template:Swindon MAS Stages}}

Latest revision as of 13:49, 19 August 2014

Back to List of Stages.

Swindon MAS Stage 1 - Uffington to Highworth Junction

Overview

The main purpose of Stage 1 of the Swindon MAS scheme was to remove the mechanical signal boxes between Uffington and Highworth Junction and instroduce MAS and TCB between the signal boxes, in readiness for future migration to the Panel.

Detail

This stage was planned to be introduced over the period Saturday 12th November to Monday 14th November 1966 between Uffington and Highworth Junction.

As part of this stage of the scheme, Knighton, Ashbury Crossing and Marston Crossing West Signal Boxes were all taken out of use, with all the signalling removed and the level crossings at Knighton and Ashbury temporarily closed pending conversion to AHB. Knighton Signal Box was planned to be taken out of use between 0700 and 0800 on Saturday 12th November, preliminary to the main occupation.

Continuous track circuiting was installed on both lines from Uffington to Highworth Jn, and track circuit block (TCB) applied between the two boxes.

Uffington’s Up Main Distant and Home and its Down Main Starting were all removed in favour of the new sequence of automatic signals west of the loops.

Highworth Junction’s Down Main Distant and Up Main Outer Advanced Starting were similarly treated. [Numbers??]

Ground Frames

A new ground frame was installed at Ashbury to control the trailing connection from the siding there named "Ashbury Up Siding Ground Frame". The existing ground frame at Ashbury, controlling the emergency crossovers remained. Both ground frames were locked by Annetts keys released from Uffington, the protecting signals were UM.71 on the up and DM.70 on the down.

Multiple Aspect Signals

On the Up Main, the MAS signal sequence, and number of aspects, was:

UM.73R (2A, Y/G) with telephones to Highworth Junction SB.
UM.73 (3A)
UM.72 (4A) with telephones to Uffington SB.
UM.71 (4A, semi-automatic, protecting Ashbury GF)
UM.70 (4A)
UM.69 (4A)
UM.68 (3A)
UF.22 (3A, entrance to Uffington up loop)
UF.16 (3A, exit from Uffington up loop)
UM.65 (3A)

Uffington already controlled several more automatics on the Up Main east of the loops, since the Reading MAS scheme.

On the Down Main, the MAS signal sequence, and number of aspects, from Uffington was:

DM.64 (3A) with telephones to Uffington
UF.32 (3A, entrance to Uffington down loop)
UF.4 (3A, exit from Uffington down loop)
DM.67 (4A)
DM.68 (4A)
DM.69 (3A)
DM.70 (3A, semi-automatic, protecting Ashbury GF)
DM.72 (3A) with telephones to Highworth Junction SB.
DM.73 (4A)
HW.1 (4A)

Uffington already supervised several more automatics on the Down Main east of the loops, since the Reading MAS scheme.

Telephones to Uffington were also provided at the handcrank release instruments at Uffington and the ground frames at Ashbury.

Related Documents


Swindon MAS Stages
Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6 Stage 7
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