Heat pump and screw press: what they have in common

1. Step 1. Heat pump — uses — Thermodynamics. A heat pump moves heat from cold to warm by spending work — by the laws of thermodynamics.
2. Step 2. Thermodynamics — was inspired by — Watt steam engine. Carnot wrote “Reflections on the Motive Power of Fire” trying to understand steam engines.
3. Step 3. Watt steam engine — is part of — Rotary printing press. The first rotary presses were steam-driven.
4. Step 4. Rotary printing press — evolved from — Gutenberg printing press. Cylinders instead of a flat press.
5. Step 5. Gutenberg printing press — has part — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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