Loom heddle shafts and autoclave: what they have in common

1. Step 1. Loom heddle shafts — is part of — Loom. They lift groups of warp threads.
2. Step 2. Loom — evolved into — Power loom. A mechanized loom.
3. Step 3. Power loom — has part — Watt steam engine. Driven by a steam engine.
4. Step 4. Watt steam engine — evolved from — Newcomen engine. Watt improved Newcomen’s engine.
5. Step 5. Newcomen engine — was inspired by — Pressure cooker. Papin’s experiments with steam and a piston preceded Newcomen’s engine.
6. Step 6. Pressure cooker — works like — Autoclave. Papin’s digester was the prototype of the autoclave.

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