Mystery Key

[High Dyke]

I was asked about the mystery key (as shown in the photos). It is marked Highdyke Box, on.one side, and the number 3 on the other.

Discussing with railway colleagues, both retired and present has not yielded any answers as to what it was used for. It isn't a door key. I post this to a wider audience.

 

[Mcr Warrior]

A key to access manually operated points (normally covered) so allowing a train into (or out from) sidings?

 

[WesternLancer]

I was asked about the mystery key (as shown in the photos). It is marked Highdyke Box, on.one side, and the number 3 on the other.

Discussing with railway colleagues, both retired and present has not yielded any answers as to what it was used for. It isn't a door key. I post this to a wider audience.
View attachment 156598 View attachment 156599

What sort of size is it? How long for example.

 

[High Dyke]

What sort of size is it? How long for example.

Apologies. I didn't think to measure it, but I believe it's approximately 15cm long.

The item turned up at a carboot sale in Bedfordshire last year.

 

[Ashley Hill]

Signal replacement key?

 

[John Webb]

Where was Highdyke Box? There seem to be a number of places with a similar name scattered around the country.
Does the Number 3 refer to a lever, perhaps? And was it a way of locking the lever at danger while work was being carried out on the track the signal referred to?

 

[High Dyke]

Where was Highdyke Box? There seem to be a number of places with a similar name scattered around the country.
Does the Number 3 refer to a lever, perhaps? And was it a way of locking the lever at danger while work was being carried out on the track the signal referred to?

The assumption from the Tracks Through Grantham team is Highdyke, South of Grantham. This may / may not be correct.

A key to access manually operated points (normally covered) so allowing a train into (or out from) sidings?

A retired signaller friend has confirmed that, if it is Highdyke nr Grantham, then all the points were worked from the frame.

 

[Rescars]

The assumption from the Tracks Through Grantham team is Highdyke, South of Grantham. This may / may not be correct.

A retired signaller friend has confirmed that, if it is Highdyke nr Grantham, then all the points were worked from the frame.

Just a thought, but it appears that Highdyke box was rebuilt in 1916, when a 12 lever frame was replaced by a 40 lever frame to control a new branch to Closterworth as well as extensive sidings. Could the key belong to the old 12 lever frame installation perhaps?

 

[High Dyke]

Just a thought, but it appears that Highdyke box was rebuilt in 1916, when a 12 lever frame was replaced by a 40 lever frame to control a new branch to Closterworth as well as extensive sidings. Could the key belong to the old 12 lever frame installation perhaps?

Maybe.

 

[John Webb]

The assumption from the Tracks Through Grantham team is Highdyke, South of Grantham. This may / may not be correct....

In that case Highdyke Box was a short distance away from the North end of Stoke Tunnel. Could this have been a key for locking a south-bound (Up) signal at danger to prevent trains entering the tunnel while work was being undertaken in the tunnel? (The key would reside in a lock on the lever and could only be removed when the lever was 'normal' and the signal at danger.) A signal diagram for the box might confirm or refute this theory.

 

[zwk500]

There's a signal diagram from 1974 on Flikr here: https://www.flickr.com/photos/32297024@N08/6973402327

It shows signal 3 as being the signal controlling the exit from the Up Goods to the Up Main, mounted on a gantry. I'm not sure what the symbols below the Stop signals controlling the exit from the Up Goods mean. Of course the '3' may refer to something else completely.

 

[John Webb]

There's a signal diagram from 1974 on Flikr here: https://www.flickr.com/photos/32297024@N08/6973402327

It shows signal 3 as being the signal controlling the exit from the Up Goods to the Up Main, mounted on a gantry. I'm not sure what the symbols below the Stop signals controlling the exit from the Up Goods mean. Of course the '3' may refer to something else completely.

Signal 3 allows trains from the Goods loop onto the main line, signal 7 appears to allow trains to cross over into the Down Sidings, and signal 8 allows trains onto the line to Stainby. The 'D' sign below each signal indicates either a plunger or a telephone to contact the signal box is available; this allows the train crew to remind the box that they are there in the absence of track circuits. (This removes the need for one of the crew to go the 262 yards to the box to comply with the old Rule 55.)

That Signal 3 allows trains to approach Stoke tunnel (signal 13 near the tunnel mouth is obviously a later addition) reinforces my view that the key probably locked signal 3 at 'Danger' when work was being undertaken in the tunnel. I would expect there to have been a similar key for signal 12.

 

[Railsigns]

I'm not sure what the symbols below the Stop signals controlling the exit from the Up Goods mean.

Those are "D" signs, which (in LNER practice) denote that a telephone is provided.