On: Basics of Pneumatic Logic

[emersonrsantos]

There’s not much open literature around it, but one of the inventors was an engineer called Charles Barker https://en.wikipedia.org/wiki/Barker_lever

This document has some designs and more details: http://www.gutenberg.org/files/21204/21204-h/21204-h.htm , chapter III.

[LiquidSky → emersonrsantos]

Thanks!