Power Porcelain
Shackles
Key distinguishing points
- Held in situ via a centre pin to top and bottom straps.
- Power usage shackles are usually brown.
- Single or double wire ridges.
- Design attributed to Sir C.T.Bright in 1858.
Bullers Ltd were a major manufacture of this type, both telegraph and power versions. Other suppliers included J & P limited and Gaskell & grocott and Doulton.
Bullers 1947
Above - Three views of an unusual shackle type insulator. Both top and bottom sheds of this electricity supply line shackle consist of two sheds. There are no manufacturers markings and the undersides are heavily sooted due to being once located in a busy marshalling yard, sadly, now closed and devoid of track.
Latest - I now have four more examples of the above, all dated 1947 with the Bullers hand logo. 09/01/2005
Bullers 1959
Above - Three views of an shackle type insulator made by Bullers Ltd in 1959. Made with a double top shed and single bottom shed.
Bullers no date
Above - Three views of another variant made by Bullers Ltd. Made with a single top and bottom shed and no wire ridges. The plain simple printed Bullers Logo is the only marking.
Doulton 1124
Above - Three views of a Doulton shackle. The underneath is unglazed and plain. The top face however, has 1124 printed under the glaze along with the Doulton logo.
Gaskell & Grocott
Above - Three views of a reddish brown shackle manufactured by Gaskell & grocott. The underneath is unglazed and other than the underglaze G&G Made in England impression there are no other markings. Its dimensions are comparable with the other shackle type insulators shown.
J & P Limted 1600
Above - Three views of a dark brown shackle supplied by Johnson & Phillips Limited. The underneath, unglazed, is stamped J&P LTD 1600. The 1600 presumably refers to a pattern number. Its dimensions are comparable with the other shackle type insulators shown, probably made to fit within a universal specification.