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