Harrow-on-the-Hill signal box
Harrow-on-the-Hill signal box was opened by London Transport in 1948. It was built to the London Transport Type design and was originally fitted with a 95 lever Westinghouse 'N' frame (frame number 190). A push button route setting panel was installed in 1962. The box is very much still open and with no plans that I am aware of to replace it (2009) and probably the busiest frame box on LUL
Above: Underground Signalman Mr T A Brook is seen at work in Harrow on the Hill signal cabin
General view of the N2 style lever frame with track diagram overhead. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use. There are more track diagram pictures after several more lever frame pictures.
Starting at the left hand end of the frame, this is a push - pull frame with route setting. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
Middle section at the left hand end of the frame, this is a push - pull frame with route setting. The spare levers on the frame have an insert placed into the lever quadrant a common LUL practice I believe. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
View of the whole of the push - pull section of the frame which provides route setting. The computer screen in the middle of the left hand part of the frame is an automatic train recorder to replace the old grade of apprentice acting as a booking boy. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
The right hand end is actually a N2 remote frame for Harrow North remote controlled from part of the left hand part of the frame, a very strange arrangement. Point indications with the red bit around the normal indication show that the points are fitted with point heaters. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
Again another slightly different view looking from levers 112 onwards.These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
Another closer view the N2 remote frame for Harrow North remote controlled from part of the left hand part of the frame, you will notice the very strange arrangement for the lever numbering This has resulted from alterations over the years.These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
There is also a panel to control Northwood Siding. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
The main track diagram for Harrow on the Hill including the station in the centre section. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
The flyover section for the track diagram. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.
The blue diagram is for Northwood and is separate from the main diagram for the frame being to the right of the main diagram. These pictures are from the Stuart Johnson collection © who has kindly given permission for there use.