Welcome! These quick drawings are of fluidic devices that can be used to perform logic functions. I actually built these devices from balsa wood with an Exacto knife over 30 years ago. They were powered by a vaccume cleaner exhaust. There is lots more that could be done, but this is what I remember. These drawings were made at the request of users on a mailing list.
If you need additional information, please drop me some e-mail if you want more information.
... Jack (jack at coats dot org)