I have a vague memory from a chemistry class many years ago of a type of one-way pressure valve for use in balloons or gas bags. As I recall, it involved the gas entering the balloon via a long opening that tunneled into the balloon by running in the substance of the balloon wall, so that the tension on the balloon’s wall as it was inflated tended to pinch the opening closed. I suppose another example would be a ‘regular’ balloon with a very long neck, with the neck folded along the side of the balloon and then balloon and all placed in a rigid container so that inflation of the balloon would crush the neck against the wall. ISTM that the filling tube had to be long in order for this to work.
The thing is, I remember this setup as being named after a chemist or other Enlightenment natural philosopher, but Google searches for ‘Le Chatelier valve’ or ‘La Place valve’ or ‘Pascal valve’ or ‘Priestley valve’ turn up nothing. So did I hallucinate all this, or is there some setup like this named after some 18th century gentleman scientist?
