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Thanks Grimm, I’ve since learned that they were a primitive safety device to prevent the pressure tank from exploding. They are made of solid copper wire and attached to the bottom of the tank. If the fuel tank reaches the limits of its structural integrity because of excessive pressure, the...

Hello There, I have an interest in vintage blow torches and I'm puzzled about an element that appears on some torches but I'm unaware of their purpose. They are small copper protrusions that emanate from the pressure vessel of the torch. My question is, what is their function? Do they simply...