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Any idea what this is?

You are here: Home > Forum > Miscellaneous > The real thing (signalling) > Any idea what this is?

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Any idea what this is? 13/06/2015 at 12:35 #73260
Peter Bennet
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Found this in the attic and think it came from my wife's father who was in the S&T dept at Hitchin. It looks as though it's probably part of the signalling system but what I'm not sure.



Peter

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I identify as half man half biscuit - crumbs!
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Any idea what this is? 13/06/2015 at 12:40 #73261
AndyG
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Looks like a typical signal repeater, but not sure what the 'GK' would be, assuming 55 is the signal number.
I can only help one person a day. Today's not your day. Tomorrow doesn't look too good either.
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Any idea what this is? 13/06/2015 at 12:41 #73262
headshot119
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It's a semaphore signal repeater, usually found on the block shelfs in mechanical signs, boxes.

It'll show on if the arm is detected at danger.
Off if the arm is detected off,
Or wrong otherwise.

"Passengers for New Lane, should be seated in the rear coach of the train " - Opinions are my own and not those of my employer
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Any idea what this is? 13/06/2015 at 12:50 #73263
AndyG
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Some pics from Danny Scroggins's web site, Yeovil Pen Mill has some good examples:

http://photos.signallingnotices.org.uk/photo.php?pc=360&p=IMG_1151.JPG

I can only help one person a day. Today's not your day. Tomorrow doesn't look too good either.
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Any idea what this is? 13/06/2015 at 13:15 #73264
Peter Bennet
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Thanks for that, can't work out where GK could have been (I guess it's not a box reference), as I say he was based in Hitchin till he left the Railways in around 1975 but he looked after the lines all the way from Peterborough Up to Hatfield including some now closed lines in the area. Teresa's now looking up railway auctions and exclaiming at some of the prices things seem to get! There's a load more stuff in our attic and in her mother's.

I'll photograph anything else that looks interesting and post.

Peter

I identify as half man half biscuit - crumbs!
Last edited: 13/06/2015 at 13:17 by Peter Bennet
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Any idea what this is? 13/06/2015 at 16:44 #73290
Danny252
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GK strikes me as being an interlocking circuit identifier, and looking at http://valleysignals.org.nz/petone/apparatusnames.html (which I'm told accurately reflects UK practice), 55GK quite appropriately translates to "Signal Indicator for 55"
Last edited: 13/06/2015 at 16:46 by Danny252
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Any idea what this is? 13/06/2015 at 16:52 #73291
AndyG
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Danny, that would make perfect sense to me, G being a signal circuit (eg GR is the signal off relay), and K being a locking/indication circuit.
I can only help one person a day. Today's not your day. Tomorrow doesn't look too good either.
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Any idea what this is? 13/06/2015 at 16:55 #73292
eddy
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The GK is the signalling mnemonic used in signalling G = Signal. K= Indicator this would be used to indicate to the signaller the position of a signal arm

Eddy

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Any idea what this is? 13/06/2015 at 23:50 #73312
Stephen Fulcher
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GK is indeed S&T terminology for the item of equipment.

What is slightly more unusual here though is that the top bit is normally coloured either red or yellow depending on the type of signal it repeats.

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Any idea what this is? 14/06/2015 at 13:51 #73328
kbarber
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" said:
GK is indeed S&T terminology for the item of equipment.

What is slightly more unusual here though is that the top bit is normally coloured either red or yellow depending on the type of signal it repeats.

Also unusual in that the 'GK' is shown; in my experience repeaters on the block shelf for the signalman simply had the signal number. So I wonder if this was under the box somewhere, provided for the lineman's benefit?

Peter: what was your wife's unmarried name? (PM probably best way to respond.) Her father was certainly active in that part of the world when my father was a signalman down there, so they will almost certainly have come across each other. Sam Barber is the name if there are any stories, he was a senior relief signalman and covered a not-dissimilar area.

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Any idea what this is? 14/06/2015 at 17:40 #73347
Danny252
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" said:
Also unusual in that the 'GK' is shown; in my experience repeaters on the block shelf for the signalman simply had the signal number. So I wonder if this was under the box somewhere, provided for the lineman's benefit
Yes, that seems very odd to me as well - especially as the signalman doesn't really need the "GK" to identify that it's a signal repeater, nor is he likely to be able to "translate" it anyway.

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Any idea what this is? 14/06/2015 at 20:11 #73359
Forest Pines
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" said:
GK is indeed S&T terminology for the item of equipment.

What is slightly more unusual here though is that the top bit is normally coloured either red or yellow depending on the type of signal it repeats.
It's always hard to judge colour from digital photos, but I did think it could possibly be an extremely faded red.

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Any idea what this is? 14/06/2015 at 22:33 #73368
TomOF
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I'm wondering if it's possible that the backplane is in fact supplied as uncoloured and would be painted to the correct colour when required?
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Any idea what this is? 15/06/2015 at 09:30 #73392
Izzy
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To my mind GK could either be "signal Indicator" as Steven says, or it may have been used as a slot repeater (hence no colour) and GK might be an abbreviation of the signal box next door who shares the slot.

Looking at it again, I doubt the slot idea. 55 GK suggests "55 Signal Indication/Indicator". Although it isn't common for the S&T "Signalling Alphabet" to show up like this, is is certainly not unheard of - and the indicator would have been shown as this in the drawings, so they may have just copied the equipment name from these, especially if this was an item used to replace an original that had gone defective. This would also explain why there is no colour representing the signal - these indicators can be used to repeat all sorts of things - slots, lamps (in/out), signals, even track circuits in the really old days, amongst other things.

If this was all they had in the stores when it was needed, (bearing in mind there are never many items like this in a signalling store (well, not the places i have worked anyway)) then this is what would have been used to get the signalman his indication back.

Another look at the phot - and i'd suggest that the top of the backplate was painted red at some distant point in the past, just extremely faded now.

Last edited: 15/06/2015 at 09:44 by Izzy
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Any idea what this is? 16/06/2015 at 08:21 #73431
kbarber
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Actually an even closer look suggests the 'backplate' might be a hastily applied paper label complete with grease stains...
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