One of the Men’s Sheds recently got in contact with me to try to help identify some tools that were in an old chippies toolbox.
Does anyone recognise what these are, and their purpose? Either end of each is a lead sphere.
I don’t have a good answer, but it strikes me that they may have something to do with balance, and/or heat. If one end heats up faster or hotter than the other, whether this is a trigger for what these are attached to, or a way or measuring differential temperature.
Anyone have a more knowledgeable answer?