London, Southport & ‘Supervia’ Mantle
(This is an element of ‘Lighting – Street Lamps‘)
The London Lamp
12 Lt. London Lamp illustrating effect of mirror reflectors
End Section showing arrangement for adjusting reflectors
Literature for the London Lamp with Extended Canopy (above)
12 Lt Model 3020 with ‘Modern Streamlined’ Casing
6 Lt London Lamp with Extended Canopy
The original display page with text describing the installation of “London” lamps on London Bridge. The following pictures illustrate the largely manual aspect of this installation in 1948. The text is incorrect in that the lamps were 10 lt not 12 lt.
Final photo of completed installation. 10 Lt London Lamps, London Bridge 25 ft Mounting, 120 ft spacing
London Lamps in N4 and, on the right, Lighting the Southend Arterial Road
Centrally Suspended London Lamps on the Thames Embankment and on Concrete Columns in W2
The lamps both above and below all have raising and lowering gear which utilised a gas connection which rotated up a spiral to unlock and allow the lamp to be lowered to the ground. In the case of the centrally suspended models, the lamp could be drawn along the suspension cable to one side before being unlocked and lowered.
Twin 12 Lt. London Lamps clearly showing the Raising and Lowering Gear
12 Lt. London Lamp fitted with 1 Lt. ARP (Air raid precaution) Wartime Fitting to comply with Emergency Regulations.
Picture of Blackfriars Bridge during Installation of 10 Lt. London Lamps
about 1948 (but see note below!)
I was advised by Graham Feakins (in early 2015) that “With respect, I suggest that the view is post-1952 because the left-hand carriageway is devoid of tram tracks, which sadly ceased running over Blackfriars Bridge on 5th July, 1952 and the photo seems rather more to do with carriageway reconstruction as a result of the abandonment of the tramway.” In addition Graham provided two postcard pictures showing Blackfriars with the tram tracks and trams travelling over the bridge.
Whilst the earlier picture is delightful, showing the bridge in the 1920’s, the later picture from 1950 has a peculiarity I believe! The nearest post looks to me as if it has been shortened to fit in the picture! I see no reason why this post should be shorter than the others and, if you look closely, the raising and lowering cable which is just visible on the next post (click to enlarge) is not visible on the nearer one which could easily have been ignored in photo alteration! But maybe someone knows better!
Station Road, Harrow-on-the-Hill circa 1952
From the late Dennis Edwards’ collection by kind permission of Mrs P Edwards 2011.
The Single and Double Southport Lamps
The ‘Southport’ Lamp, whilst following the general shape of the London Lamp achieved its performance by the use of refracting panels made by Holophane.
The ‘Double Unit Southport’ Lamp clearly showing
the Holophone refracting panels
Development drawing of the Group ‘B’ Southport Lamp
Comparison between the double (in the middle) and single unit Southport’s. The section drawings also illustrate the way in which the light is refracted by the Holophane panels to provide the ‘even road surface brightness and good visibility without excessive glare’ claimed in the leaflet above. On the left, the diagram shows how the circulation of the incoming air cools the panels and also the relative simplicity of the overall construction by comparison with the cross section of the London Lamp at the top of this page.
Group ‘B’ Southport in Hyde Park about 1950
Group ‘B’ Southport in Buckingham Palace Road on left and Holborn, 1950
UNDER CONTINUOUS DEVELOPMENT – PLEASE TRY AGAIN LATER
Copyright © Chris Sugg 2006-13