Anchor escapement and elevator: what they have in common

1. Step 1. Anchor escapement — is part of — Pendulum clock. An anchor escapement.
2. Step 2. Pendulum clock — has part — Pendulum. The pendulum sets the period.
3. Step 3. Pendulum — is used in — Tuned mass damper. A pendulum.
4. Step 4. Tuned mass damper — is part of — Skyscraper. A damper.
5. Step 5. Skyscraper — has part — Elevator. A skyscraper is impossible without a lift.

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