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G.N. signalling Moorgate line

British signalling of the past (UK, excepting Northern Ireland)

G.N. signalling Moorgate line

Unread postby scarpa » Fri Apr 21, 2017 9:50 am

The G. N. was responsible for building the underground line from Drayton Park to Moorgate about the turn of the century. Is there any information on the type of signalling installed and location of signalboxes ,power frame types .Were trainstops employed .Were steam engines banned from the tunnels, condensing type?
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Re: G.N. signalling Moorgate line

Unread postby davidwoodcock » Fri Apr 21, 2017 10:00 am

It ran from Finsbury Park (underground) via Drayton Park to Moorgate when it was built - and it was built by a private company, which admittedly had aspirations of linking with the Great Northern but was thwarted by that company. It sold out to the Metropolitan Railway which operated it until the LPTB was formed. It had a central conductor rail but I am not certain about the signalling.
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Re: G.N. signalling Moorgate line

Unread postby Harsig » Fri Apr 21, 2017 3:12 pm

H. Rayner Wilson's 'Power Railway Signalling' has a description of the original signalling on this line (Pages 180 to 183) (Part 1B if you have the Peter Kay reprint)
The equipment was provided by Spagnoletti and Co. Two aspect colour light signals were provided (with the red aspect above the green). Signal boxes were provided at all the stations. However to quote: 'Signal boxes with attendant signalmen, are provided at each station. These men are not necessary for signalling purposes, and they do not interfere at all with the operation of the signals, but they are useful for booking the passage of the trains and watching that all is right, whilst their presence would be extremely useful in case of emergency. All the relays and operating mechanism, too are in the signal boxes so that the men keep them under constant observation.'
Train detection was by means of track circuits, reinforced with what are described as treadles located between 350 and 400 feet in advance of signals. These worked by completing and electrical circuit when they came into contact with a special brush mounted on the rear vehicle of the train.
Where points existed (Finsbury Park, Drayton Park and Moorgate) these were worked mechanically from lever frames, these frames also controlling the signals in the area.
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Re: G.N. signalling Moorgate line

Unread postby scarpa » Sat Apr 22, 2017 12:07 pm

Thankyou for the replies. If 2 aspect colour light signals were used ,and the line opened in 1904 these would predate the Liverpool overhead railway where it is claimed colour light signals were among the first installed.The red aspect was the top aspect ,were they provided by the same company. Is there any record how the rolling stock was moved onto the line.Was there a connection at Drayton Park? Were trainstops in use on the Moorgate line.
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