12/04/2026
In researching Armathwaite signal box, we have discovered that the first two track circuits installed in 1931 were (like most of the rest of the S&C) repeated using the square LMS repeaters, rather than the later ubiquitous circular Thompson banner repeaters.
(The second tranch of track circuits installed in 1938 did use the Thompson ones).
Does anyone have one that they would be prepared to photograph the internal workings, please? And accurate dimensions would be useful as well. I suspect that they are approximately 4" square and 6" deep.
I suppose hoping that there are two of them for sale is optimistic?
The first photo shows one that was sold in auction in 2019. The Thompson unit beside it gives a good indication of size.
The second photo shows the interior of Armathwaite signal box in the late 1960s.