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Post by Deleted on Nov 10, 2014 17:28:17 GMT
I've just joined the forum and realize I should have joined years ago! I have been laboriously building in Microsoft Train Simulator the Chiltern Line from Marylebone to Banbury set around 1960 and have included most of the LT lines that either run alongside the Chiltern (eg the Central from West Ruislip to North Acton and the Bakerloo -as it was then - and Metropolitan from Baker Street to Stanmore for the former and Amersham for the latter) or cross the Chiltern (eg the Piccadilly at Park Royal).
I have used the diagram available on Harsig's site of the 1939 Bakerloo line signalling from Baker Street to Stanmore (including the Met as far as Stanmore Junction) for guidance on the signalling of this part of my route. The diagram includes icons for what appear to be two- and three- headed fog repeaters. Can someone please enlighten me as to 1. how these particular signals function (eg. do the icons represent some kind of junction fog repeater?) and 2. what they looked like in reality (eg. were they really a two- or three-headed signal perhaps mounted on a bracket)?
I'd be very grateful for any advice.
DocMartin
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Post by Harsig on Nov 10, 2014 19:43:14 GMT
The diagram includes icons for what appear to be two- and three- headed fog repeaters. Can someone please enlighten me as to 1. how these particular signals function (eg. do the icons represent some kind of junction fog repeater?) and 2. what they looked like in reality (eg. were they really a two- or three-headed signal perhaps mounted on a bracket)? I'd be very grateful for any advice. DocMartin They were indeed multi-headed fog repeaters. You should find that each group is the fog repeater for a junction signal and one fog repeater head was provided for each route. The photo below is a cruelly enlarged image of the interior of the standard stock train at the LT Museum Depot. There are a number of interesting photos on display in this car and one of them (the centre photo in the image below) is of a multi-headed fog repeater, which if memory serves is on the approach to Harrow on the Hill northbound fast (FRJB2/13/14). I hope you can make out some detail. Unfortunately I've not come across any other images of a multi-headed fog repeater as they have all been long ago phased out. The multi-headed repeater and fog repeater signals were a hold over from the early days of colour light signalling where even the main junction signal had multiple heads. This image of Arnos Grove shows an example. It is clear how much space this takes up and the development of the position light junction indicator for the main signal was rapidly adopted. At first however separate heads were retained for repeaters and fog repeaters, before the decision was taken to fit them with miniature position light junction indicators so that only one signal head would be required here as well In the 1950s, and probably into the 1960s, LT went through a process of standardizing signal aspects with the result that most if not all multi-headed signals disappeared. |
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Post by Deleted on Nov 10, 2014 23:42:57 GMT
Thanks for your post, Harsig. Just what I needed! Since my route is nominally set in a time frame around 1960, I think I might use some route builder's licence and allow myself some multi-head fog repeaters along the lines of the poster in the museum photo. Very interesting stuff and very helpful.
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DWS
every second count's
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Post by DWS on Nov 11, 2014 8:25:49 GMT
Multi-headed colour light signals at junctions replaced the the multi post semerphore signals used at junctions.
When the Piccadilly Line was extended from Finsbury Park to Cockfosters the signalling was partly based on the District Railway practice where multi post semerphore signals at Mill Hill Park /Acton Town were replaced by multi-headed colour light signals at junctions.
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