Printer carriage and tunnelling shield: what they have in common

1. Step 1. Printer carriage — is part of — Spinning jenny. It draws out the roving.
2. Step 2. Spinning jenny — evolved from — Spinning wheel. Many spindles driven by one wheel.
3. Step 3. Spinning wheel — has part — Belt drive. The wheel is linked to the spindle by a cord.
4. Step 4. Belt drive — is used in — Conveyor belt. The belt runs around the drive and tension drums.
5. Step 5. Conveyor belt — is part of — Tunnel boring machine. Spoil is removed by a conveyor.
6. Step 6. Tunnel boring machine — evolved from — Tunnelling shield. A development of the tunnelling shield.

Open Evothings