https://www.instructables.com/The-Allen-Hydrautomat-a-working-paint-tin-model/
The Allen Hydrautomat, a Working Paint Tin Model. : 13 Steps (with Pictures) - Instructables
The Allen Hydrautomat, a Working Paint Tin Model.: A silent system of raising water patented in 1926 by Thomas Gaskell Allen, was alleged to have an efficiency...