CU Phosco P.107 post-top lantern for 35w SOX lamps

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Still available from CU Phosco in 2007, the P107 post-top lantern has be a popular seller for the Company for many years. Availible for use with either GLS, MBF, SON, or CMD lamps, the P107 can supplied with, or without control gear. There are other options available too, such as clear or opal cones, 12" or 24" diameter canopies (P107/12 and P107/24), and various paint finishes. Like other post top lanterns from CU Phosco, the P107 can be supplied with 'Duoptic' refractors for asymmetrical distribution should it be a requirement of the customer.

The lantern in the collection is a remote gear version that burns a 35w SOX lamp in the cap-up poistion. The lantern also incorporates two 'stacked' Duoptic refractor rings, to control the distribution from the vertically mounted sodium lamp. The lantern with its 24" aluminum canopy is in very good condition and came from Woodlands Grove in Edinburgh on 9th March 2007, where it and was resuced along with several others by fellow collector John Thompson, who happened to be passing by when contractors were removing these lanterns as part of the City's PFI street lighting renewal scheme. John has kindly passed most of these lanterns on to other collectors, including myself; so many thanks John.

  

A side view of the Edinburgh P107 lantern rescued by John Thompson. The lantern is in good condition, but will need a replacement clear cone; as can be seen, the original has gone 'milky' at the base. Hopefully, the mobile phone gives some idea as to the physical dimensions of the lantern.

 

Looking down on the P107's 24" diameter aluminium spun canopy, we can see that it is unmarked and in very good condition; thankfully, it hasn't been drilled for a two-part photocell detector.

Unscrewing the plastic securing ring allows for the removal of the thin aluminium canopy. The screw hole through the canopy looks to have been deliberately elongated, probably because the canopy didn't quite centralise when it was originally fitted to the lantern?

 

With the canopy removed, we can see the two spines that support the lampholder assembly and on to which the glass refractor rings are mounted. The canopy fixing screw has been put back into the lantern to show where it screws into.

With the canopy removed we can see the way in which the two 'stacked' refractor rings have been arranged around the 35w SOX lamp in an effort to give the lantern some sort of asymmetrical light distribution. Clearly this was something that Edinburgh's lighting engineers must have requested, as I've seen other SOX lamped P107s that have single refractors.

Looking up under the refractors we can see the spring-loaded hooks that hold them into place and the cork gaskets fitted between the glass and the mountings rings.

 

Looking down on the top of the lantern's lampholder assembly show the mounting bridges onto which the the lampholder and the refractors are fixed.

 The base of the unit showing the aluminium die-cast column-top/spigot receptor, which uses three Allen grub screws to secure the lantern to the column. The word 'Road' is cast into the unit and indicates to the lighting engineer which side of the lantern needs to face the roadway to obtain the correct alignment.

No image of an in-service P107/24 available

Awaiting image of a P107/24

As a comparison, here's a P107/12 with the smaller 12"diameter canopy; this has an opal bowl and was photographed in Chester in April 2007 mounted onto a much older ESLA No44 column.

 

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Copyright(c) 2005-2007 Claire Pendrous. All rights reserved.

Please note that all pictures are by Claire Pendrous, or are part of the Claire Pendrous photographic collection unless otherwise stated; none of these images can be copied without obtaining prior permission.