
Photo: N L Cadge 22/10/80.
Unfortunately the quality of the original photogrpah does not reveral the detail of the raised lettering in the metalwork.
John
JRB wrote:.....apart from the unhelpful "TYER & Co...".
JRB wrote:Would it put the tablet instruments out if phase? It might just interrupt their line wires.
Mackay wrote:There is a full description of the system - which was designed to allow a PW trolley to occupy an ETS section without a token - in an issue of Railway Gazette. There were specified locations where the trolley could be taken off the track and an electric plug on the trolley inserted in a fixed socket, and the key turned, to restore token working. Don't have this to hand right now, and need to leave shortly. Will dig it out in due course. The trolley keys appear in auction from time to time.
Andrew Waugh wrote:[snipped]
*If* this is the system in the photo, then the lower box would be the dummy plugbox with its key present. However, if this is so, the key is present, but the cable is missing. So it might not be this system.
I obviously wasn't clear John - that's basically what I was saying, although I thought there could also be a similar control box at the far end, which would be unnecessary if the trolley lived at one end as indicated by your photo.John Hinson wrote:Pure conjecture, but:
- Upper device breaks the tablet circuit and activates the bottom instrument
- The bottom instrument could be just one of several along the section allowing a trolley key to be withdrawn. I would disagree with Mike H - there could potentially be a key in every instrument, except that would preclude the "putting in of one" if there was one already there. It would appear, though, that the trolley normally lived at Bedale so there would be no need to have keys in the mid-section instruments
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