Found at Glenboig Union Fire Clay Works, Glenboig.
This could also be Glenboig KG 92 80/ BW.
Glenboig Union Fireclay Company, Glenboig, Lanarkshire.
Alternative brickworks include:
- Glenboig Star Fireclay Works, Glenboig, Lanarkshire.
- Glenboig Fireclay Works, (Old Works) Glenboig, Lanarkshire
According to Harley Marshall, this is likely to be a firebrick for a ship’s boiler. The hole in the block is recessed for about 3/4 of the block depth. At the bottom of the opening, there is a further opening to the left and right. This opening is to take the head of a long bolt. This bolt has a special head with flanges that you twist once seated into the opening so the flanges enter each of the gaps at the side. The bolt is then entered through a hole in the boiler wall and tightened pulling the block in tight to the wall. You, therefore, have a firewall lining but with no bolt heads sticking into the boiler itself. This was an Admiralty Patent. (AP – was often an abbreviation referring to Admiralty Patent). Apologies to those with a technical head for this very non-technical explanation but I hope you get the idea.
The BW possibly refers to Babcock and Wilcox who made ships boilers – Click me
14 3/4″ X 7 3/4″ X 2 1/2″
Opening measures 1 3/4″ x 3/4″ and is 1 3/4″ deep
Below – The bottom edge (left of pic) slopes backwards.
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