Jacquard loom and elevator: what they have in common

1. Step 1. Jacquard loom — was inspired by — Automaton. Vaucanson, the maker of automata, built an automatic loom whose ideas Jacquard used.
2. Step 2. Automaton — has part — Spring. The mainspring stores the energy.
3. Step 3. Spring — is part of — Elevator safety brake. Springs throw out the catches when the rope goes slack.
4. Step 4. Elevator safety brake — is part of — Elevator. Otis’s safety brakes.

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