Kent & East Sussex Railway
Tenterden Town Signal Box
Tenterden signal box was re-constructed at Tenterden in 1973 and commissioned in 1976, having been moved from Chilham, Kent, its former home on the rail network.
The Tablet System
Among the equipment in the signal box is a tablet instrument, which controls the single line to the next station.
The signalman, with permission from his colleague at Rolvenden, takes a tablet from the machine. It is a brass disc, rather like an outsize biscuit, which he hands to the train driver as authority to enter the section.
Once he has removed one tablet, his machine and the identical one at Rolvenden become locked, and no more tablets can be issued.
The tablet travels on the footplate to the far end of the section, where it is replaced in the instrument there.
This frees the instruments so that either signalman can now send another train into the section.