Living in the age of technological progress, a wide range of machines and tools, we sometimes underestimate the technical ingenuity of our ancestors. Meanwhile, they used mechanisms and adaptations in design is surprisingly simple and rational.
The article by S. Razumov “Spit not afraid of stone”, reminded me of an interesting device that I saw as a boy in a village in the Leningrad region.
Usually a crooked or blunt scythe is ruled by a hammer on the anvil: one is uniformly strikes the blade, the other gradually advances when the actions of both must be accurate and consistent.
A simple “machine” — the whole, with the exception of the hammer and anvil of wooden components — simplifies and accelerates the work.
Sturdy frame is mounted on the wheel-the flywheel is driven in rotation by a winch of the type well. The edge of the wheel is equipped with a bound in sheet metal teeth.