UM.73: Difference between revisions

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Link back to [[Control Functions]].
Link back to [[Control Functions]].
[[File:UM73.jpg|thumb|300px|right|UM73 Signal (Left) and SN681 Signal (Right) ''(Photo by Danny Scroggins)'']]


==Origin==
==Origin==


UM.73 was a 3-aspect automatic signal commissioned at [[Swindon MAS Stage 1]] on 14 November 1966<ref name="S.2498">Signalling Notice [[S.2498]]</ref>. At that stage it was supervised by [[Highworth]] Junction SB. It was the first colour light stop signal on teh Up Main in the new set of track circuit block sections that had been installed between [[Highworth]] Junction and [[Uffington]] SBs.
UM.73 was a 3-aspect automatic signal commissioned at [[Swindon MAS Stage 1]] on 14 November 1966<ref name="S.2498">Signalling Notice [[S.2498]]</ref>. At that stage it was supervised by [[Highworth]] Junction SB. It was the first colour light stop signal on the Up Main in the new set of track circuit block sections that had been installed between [[Highworth]] Junction and [[Uffington]] SBs.


It had its own repeater, [[UM.73R]] (which eventually became [[UM.75]] under [[Swindon MAS Stage 5]]).
It had its own repeater, [[UM.73R]] (which eventually became [[UM.75]] under [[Swindon MAS Stage 5]]).
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|NextSignal=[[UM.72]]
|NextSignal=[[UM.72]]
}}
}}
==Alterations in connection with Reversible Signalling==
From 6 March 1977 the signal was mounted on a right-hand cantilever, in readiness for the future installation of [[SN.683R]].
[[File: 1977-03.png|border]]
The reversible signalling was brought into use in 1981 <ref>Signalling Notice [[31/W/2773]]</ref>. [[SN.683R]] later became [[SN.681]]<ref>Signalling Notice [[GWS.15]] and [[GWS.27]]</ref>.





Latest revision as of 12:51, 15 November 2014

Link back to Control Functions.

UM73 Signal (Left) and SN681 Signal (Right) (Photo by Danny Scroggins)

Origin

UM.73 was a 3-aspect automatic signal commissioned at Swindon MAS Stage 1 on 14 November 1966[1]. At that stage it was supervised by Highworth Junction SB. It was the first colour light stop signal on the Up Main in the new set of track circuit block sections that had been installed between Highworth Junction and Uffington SBs.

It had its own repeater, UM.73R (which eventually became UM.75 under Swindon MAS Stage 5).

Previous Signal Line Line Next Signal
Highworth's Up Main Starting (Semaphore) Up Main Up Main UM.72
Highworth's Up Goods Loop Starting (Semaphore) Up Goods Loop
Highworth's Up Siding Starting (Semaphore) Up Siding

Supervision of UM.73 passed to Swindon Panel under Swindon MAS Stage 5 on 3rd March 1968.

Previous Signal Line Line Next Signal
UM.75 Up Main Up Main UM.72

Alterations in connection with Reversible Signalling

From 6 March 1977 the signal was mounted on a right-hand cantilever, in readiness for the future installation of SN.683R.

1977-03.png

The reversible signalling was brought into use in 1981 [2]. SN.683R later became SN.681[3].


References

  1. Signalling Notice S.2498
  2. Signalling Notice 31/W/2773
  3. Signalling Notice GWS.15 and GWS.27