Program control of a machine and sickle: what they have in common

1. Step 1. Program control of a machine — is used in — Automaton. The sequence of movements is “recorded” in cams and cylinders.
2. Step 2. Automaton — has part — Cam. Cams set the figures’ movements.
3. Step 3. Cam — is part of — Trip hammer. Cams on the shaft lift the hammer.
4. Step 4. Trip hammer — evolved from — Hammer. A trip hammer is a hammer lifted and dropped by a water wheel.
5. Step 5. Hammer — evolved from — Stone tool. The first hammer was a stone in the hand.
6. Step 6. Stone tool — evolved into — Sickle. The first sickles had flint inserts.

Open Evothings