Thanks.I don't have a copy of a yellow peril to reference to at hand, but my immediate thoughts are that it is a three state banner repeater,
1. Arm horizontal - signal on
2. Arm diagonal - signal showing yellow
3. Arm diagonal and banner lit green vice white - signal showing green
Looking at Aviemore by any chance?
Its known as the 'screwhead' symbol.
Signals have :
Symbol
Prefix
Number
Suffix
The symbol for a three stage banner is a White circle with a black stripe down the middle. The symbols used in the table A diagrams, NR route diagrams, local route maps tend to reflect the signal symbol or have a linked key.
If you have a picture it would be helpful
I don't have one to hand to check, but is it not signal aspects?
I know the exact ones you mean !! Can't find the other map with them on :/
Depending on the drawing and the physical item 'on the ground', the three circles could be superimposed (so, on the plan, looking like an incomplete star in a circle) for those signals where the three colours all show in the same aspect (not all at once, obviously!). You probably know that; just some extra info for those that don't.I don't have one to hand to check, but is it not signal aspects? Ie circle with horizontal bar the red aspect, yellow aspect circle with diagonal, green with vertical? So a three aspect main signal would be three circles with horizontal on the bottom, a diagonal above, vertical on top?
View attachment 60379
Found one \o/
Aren't the different directions of lines in case the diagram is printed in greyscale?
Well yes, and that site was already linked a few posts back.Google is your friend, especially if you know how to do site-specific searches and which site to specify...
https://www.google.com/search?q="banner+repeater"+site:railsigns.uk
The real thanks goes to Jonfun for providing the correct answer. It's hard to go off a description and a picture truly says a thousand words.
http://www.railsigns.uk/sect9page3/sect9page3.html
Bottom of the page is the signal plate indication for the three stage banner.
The OP described the way a 3 aspect signal is drawn on a track plan. But later, in post #11, a coloured version of a four aspect signal was presented in explanation. But when drawn in black and white these signal symbols, consisting of 2, 3 or 4 circles in a row, use the position of the lines to denote the possible colours of the signal.Well I am confused
Green in the middle, yellow on top! Is it related to British signalling or elsewhere?The one below is pulled from the tinterweb and shows a 3 aspect/black and white diagram.
View attachment 60415
I perhaps should have asked whether it’s supposed to represent UK practice . I’m just curious whether that arrangement’s actually used somewhere else in the world, or whether it’s just a pretty fundamental error on the part of whoever drew the diagram.Is a Yellow Peril one of those resignalling diagrams with a yellow cover?
If so, they use(d) standard signalling diagram conventions for c/l signals (and for semaphores).
@Tomnick it's not correct for UK practice (you can have YGY though).
Green in the middle, yellow on top! Is it related to British signalling or elsewhere?
So, to recap:
OP had a track diagram with some markers representing signals, similar to the one in #11, and was wondering what the specific parts of them meant.
As it turns out, they show a colour light signal, and use directional lines as well as colours to distinguish the different colour lamps.
Is the item mentioned in #13 actually relevant to the answer? Or was it an aside showing how there could be a "vertical" position banner repeater, at least in sign form, if not as an actual signal?
or whether it’s just a pretty fundamental error on the part of whoever drew the diagram.