Pluggy has it. Bancroft Engine.
Next for shaving?
Tiz, interesting. The site was in full production in the 1960s when I used to have a regular run from The Arran Barytes Company, Dalintober Street to the site. Ten tons of bagged, ground barytes which was used as a filler to make the sticks of Unigel. They used to search me at the gate, make sure I had rubber soled boots on and the battery was taken off the wagon. I was towed to the place where the barytes was used and was only allowed to take the sheet off and fold it. The workers did everything else. There was always a guard with me and I remember seeing through the door men with wooden paddles stirring what I think was Nitro glycerine in round copper vats. All the tools on the site were made of copper and that winch was used for the aerial rope-way that transferred the finished explosive to the old quarry which was on the top of the hill. There was only one naked light on the site, a gas jet in a class brick walled enclosure in the canteen so you could have a smoke....
One thing that intrigued me was that the vans they used to deliver the explosives were painted plain maroon all over and the only identifying mark was a small brass plate on the bottom near side corner of the box body that said 'Cooke's Explosives' and was heavily painted over. Those vans weren't allowed to transport detonators with the finished explosives. When ICI vans took over they were labelled 'Explosives' and they tell me that detonators were transported with the gelignite. The load paid well and I always enjoyed it.